428 results on '"Poliéster"'
Search Results
2. The Influence of Microfibres in Municipal Sludge on Biogas Production.
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Lekše, N., Bulc, T. Griessler, and Gotvajn, A. Žgajnar
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SEWAGE disposal plants , *ANAEROBIC digestion , *SEWAGE sludge digestion , *SEWAGE sludge , *CARBON dioxide , *BIOGAS production , *BIOGAS , *METHANE as fuel - Abstract
Wastewater treatment plants (WWTPs) contribute to the release of microplastics into the environment. While the removal efficiency of MPs in WWTPs can reach up to 99.9 %, the highest amount of microplastics is retained in the sludge. Anaerobic digestion, one of the most promising and common processes, can help reduce sludge volume and odour, and due to the formation of biogas, mainly consisting of methane (CH4) and carbon dioxide (CO2), can help decrease the operating costs of WWTPs. A test measuring the inhibition of biogas production using the OxiTop® measuring system was employed to determine the effect of added microfibres (MFs) on biogas production. Particles less than 1 mm in size of polyester, polyamide, and polyacrylic, were added to anaerobic sludge at concentrations ranging from 0.05 to 0.10 g l–1 to simulate their effect on biogas production. The yields of CH4 and CO2 produced during anaerobic digestion of the MFs-contaminated sludge were determined. The addition of MFs to sewage sludge affects methane production. The results indicated that the lowest added concentrations of 0.05 g l–1 of MFs promoted methane production, while the presence of 0.1 g l–1 decreased methane production for all types of MFs used. Polyacrylic at 0.1 g l–1 had the most negative effect on methane production (up to 27 %), while polyamide at 0.05 g l–1 reached the highest methane production (up to 25 %). [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
3. Inspección de microplásticos en aguas de consumo en España y la Unión Europea
- Author
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Rafael Marín Galvín
- Subjects
agua de consumo ,microplásticos (MP) ,nanoplásticos (NP) ,contaminantes de preocupación emergente ,poliéster ,polipropileno ,Medicine - Abstract
En el recientemente aprobado RD español 3/2023 sobre aguas de consumo humano, adaptación de la primitiva Directiva UE 2020/2184, se incluye en su artículo 19 la denominada Lista de Observación que engloba los denominados «contaminantes de preocupación emergente que se consideren un riesgo para la salud». Así, en el apartado 4 del Anexo IV del reseñado RD, se publica la Lista de Observación nacional con las referencias a 17b-Estradiol, nonilfenol, azitromicina y diclofenaco, indicándose literalmente además que «los microplásticos se incluirán en la lista cuando la Comisión Europea adopte una metodología normalizada para medir los microplásticos en el agua de consumo». Este artículo tiene un doble objetivo: (i) pasar revista a la última posición sobre el tema publicada por la UE en septiembre de 2022 desde el organismo que se ocupa de este tipo de cuestiones, el Centro Común de Investigación de la Comisión Europea (conocido por sus siglas inglesas como JRC); (ii) en segundo lugar, se recogerán los más recientes resultados sobre MP en aguas españolas. En este sentido, los tipos de microplásticos (MP, en adelante) mayoritariamente encontrados fueron poliéster (PES), polipropileno (PP) y polietileno (PE), detectándose, asimismo, poliestireno, ABS y poliamida. Además, los MP reducían su concentración en una ETAP desde agua bruta a (0,96 MP/L) tras filtración por arena, carbón activo granular y ósmosis inversa en más del 93 % respecto al agua cruda de entrada a planta. Finalmente, las concentraciones de MP en aguas de consumo fueron muy bajas, entre 0 y 0,05 MP/L, con un promedio de 0,01 MP/L.
- Published
- 2024
4. PET, GERİ DÖNÜŞÜMLÜ PET (r-PET) ve BİYOBOZUNABİLİR PET (bio-PET) İÇERİKLİ KUMAŞLARIN MEKANİK VE YAPISAL ÖZELLİKLERİNİN İNCELENMESİ ÜZERİNE BİR ÇALIŞMA
- Author
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Cansu İşbilir Salih, Zeynep Atlas, Semiha Eren, and Aliye Akarsu Özenç
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poliester ,geri dönüştürülmüş poliester ,biyobozunur poliester ,boyama ,polyester ,recycled polyester ,biodegradable polyester ,dyeing ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Poliester (PET) lifleri tekstil endüstrisinde dünya genelinde en çok kullanılan sentetik liftir. Dünya genelinde çevresel ve ekolojik kaygıların artmasıyla sentetik liflerin geri dönüştürülmesi, biyobozunurluğunun sağlanması yönünde çalışmalar yapılmaktadır. Bu deneysel çalışmada poliester, geri dönüştürülmüş poliester (r-PET) ve biyobozunur poliester (bio-PET) içerikli kumaşların boyama ve fiziksel performansları karşılaştırılmıştır. Elde edilen sonuçlarda r-PET ve bio-PET içerikli numunelerin en az PET içerikli kumaşlar kadar iyi boyandığı haslık ve mukavemet değerlerinde belirgin farklılıklar olmadığı tespit edilmiştir. Bu kapsamda r-PET ve bio-PET liflerinin PET liflerine alternatif olabileceği düşünülmektedir.
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- 2023
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5. Effect of Blending Cotton/Bamboo on UV Protection and Functional Purposes of Trilobal Polyester Microfibers Knitted Fabrics Using Different Structures.
- Author
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Ali, Marwa A. and Seddik, Khaled Mohamed
- Abstract
The article focuses on enhancing ultra-violet protection and reducing electrostatic charge in fabric manufacturing, particularly in response to global climate changes, by blending cellulose yarns (bamboo and cotton) with trilobal polyester microfiber yarn. Topics discussed include the impact of different knitted structures (single jersey and fleece), with bamboo showing preferable performance in mitigating electrostatic charge and improving ultraviolet protection factor (UPF) properties.
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- 2023
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6. PET, GERİ DÖNÜŞÜMLÜ PET (r-PET) ve BİYOBOZUNABİLİR PET (bio-PET) İÇERİKLİ KUMAŞLARIN MEKANİK VE YAPISAL ÖZELLİKLERİNİN İNCELENMESİ ÜZERİNE BİR ÇALIŞMA.
- Author
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EREN, Semiha, AKARSU ÖZENÇ, Aliye, ATLAS, Zeynep, and İŞBİLİR SALİH, Cansu
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POLYESTERS , *DYES & dyeing - Abstract
Polyester (PET) fibers are the most widely used synthetic fiber in the textile industry worldwide. With the increasing environmental and ecological concerns around the world, efforts are being made to recycle synthetic fibers and to ensure their biodegradability. In this experimental study, the dyeing and physical performances of polyester, recycled polyester (r-PET) and biodegradable polyester (bio-PET) fabrics were compared. In the results obtained, it was determined that the samples containing r-PET and bio-PET were dyed at least as well as the fabrics containing PET, and there were no significant differences in fastness and strength values. In this context, it is thought that r-PET and bio-PET fibers can be alternatives to PET fibers. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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7. SÜPERKRİTİK VE KLASİK ORTAMDA POLİESTER BOYAMANIN YAŞAM DÖNGÜSÜ ANALİZİ İLE DEĞERLENDİRİLMESİ
- Author
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Hüseyin Aksel Eren, İdil Yiğit, Neslihan Karadağ, and Semiha Eren
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poliester ,klasik boyama ,susuz (scco2) boyama ,yaşam döngüsü analizi (lca) ,polyster ,classical dyeing ,waterless (scco2) dyeing ,life cycle analysis (lca) ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Su hem yaşam için hem de sahip olduğu özellikleri nedeniyle de değerli bir kaynaktır. Bu nedenle, su kıtlığı ve artan çevre bilinci dünya çapında endişeye sebep olmaktadır. Tekstil sektörü genel olarak su tüketiminin yoğun olduğu proseslerden oluşmaktadır. Özellikle boyama işleminde çok fazla su kullanılmaktadır. Bu sebeple su kullanımının azalmasına yönelik boyama çalışmaların her geçen gün öneminin artacağı görülmektedir. Bu çalışmada, süperkritik karbondioksit (scCO2) ortamda susuz ve klasik sulu ortamda bir adet % 100 poliester dokuma kumaş açık ve koyu tonda olmak üzere boyanmış, boyama proseslerinin aşamaları her iki ortam için de yaşam döngüsü analizi (LCA) yöntemi ile değerlendirilmiştir. Analiz için SimaPro 9.3 programı kullanılmış ve yapılan karşılaştırma kümülatif olarak süperkritik ortamda yapılan boyamada çevresel etkinin klasik sulu ortamda boyamayla karşılaştırıldığında göre daha az olduğu dolayısıyla daha avantajlı olduğu sonucuna varılmıştır.
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- 2022
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8. Análisis FT-IR de una Pasta de CPO Adicionada con Poliéster Sintetizado a Partir de Metanol/Ácido Cítrico.
- Author
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Fuentes Chávez, Fernando, Cuadros Portales, Juan Andrés, Gallardo Heredia, Marisol, Martínez Sánchez, Erika, and Ávila López, Ulises
- Abstract
Copyright of Congreso Internacional de Investigacion Academia Journals is the property of PDHTech, LLC and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
9. Farklı Yapıdaki Kumaşlara Antimikrobiyal Apre Uygulaması ve Etkinliklerinin Karşılaştırılması
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Tuğba Zengin, Aysun Saraç, Ekrem Akbulut, and Nisa Sipahi
- Subjects
antimikrobiyal apre ,gümüş ,kuarterner amonyum tuzu ,salgın ,pamuk ,poliester ,antimicrobial finishing ,silver ,quaternary ammonium salt ,epidemic ,cotton ,polyester ,antimicrobial finishing, silver, quaternary ammonium salt, epidemic, cotton, polyester ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Science ,Science (General) ,Q1-390 - Abstract
Hastalıklardan korunmada tekstil ürünlerin büyük rolü bulunmaktadır. Tekstil materyaller günlük hayatın birçok yerinde karşımıza çıkmaktadır. Özellikle son iki yıldır yaşanan covid-19 pandemisi tekstilin önemine daha da dikkat çekmiştir. Bununla birlikte “tekstil bizi salgınlardan koruyabilir mi?” sorusunu da gündeme getirmiştir. Bakterilerle dolu bir çevremiz olması, virüslerin bakterilere tutunarak saçılması ve nozokomiyal hastalıkların son yıllarda artış göstermesi, antimikrobiyal tekstil üretimine gereksinim olduğunu düşündürmektedir. Bu çalışmada farklı yapıdaki kumaşlara gümüş ve kuarterner amonyum tuz (QAS) apre uygulanması ve antimikrobiyal etkinliklerinin karşılaştırılması amaçlanmıştır. Kumaşlardan birisi %100 pamuk liflerden diğeri ise %100 poliester liflerden dokunmuştur. Uygulanan antimikrobiyal bitim işlemleri sonrası etkinlikleri AATCC 100 test metoduna göre belirlenmiştir. Kontrol olarak apre uygulanmamış kumaşlar aynı teste tabi tutulmuştur; ancak herhangi bir mikrobiyal inhibisyona rastlanmamıştır. Buna göre tüm gümüş apreli pamuk kumaşlarda etkinin diğerlerine oranla daha yüksek olduğu tespit edilmiştir. En yüksek inhibisyon oranı %99,03 ±0,49 olarak gümüş apreli pamuk kumaşta tespit edilmiştir. En düşük inhibisyon oranı ise QAS apreli poliester kumaşta %59,43 ±1,87 olarak bulunmuştur. Ayrıca kumaşların gram pozitif bakterilere karşı daha etkin olduğu görülmüştür. Aynı zamanda uygulanan apre işleminin kumaşlarda renk değişimi, pilling (boncuklanma) ve hidrofiliteye neden olup olmadığı da test edilmiş ve herhangi bir etki olmadığı görülmüştür. Sonuç olarak bu çalışmada farklı yapıdaki kumaşlara uygulanan antimikrobiyal bitim işlemlerinin yüksek etkinlik gösterdiği görülmüştür. Çeşitli enfeksiyon hastalıklarındaki eradikasyon çalışmalarında, günümüz pandemisi ve hastane enfeksiyonları ile mücadelede antimikrobiyal tekstil sektörünün oldukça büyük bir yere sahip olduğu ve geliştirilmesi gerektiği düşünülmektedir.
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- 2022
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10. SÜPERKRİTİK VE KLASİK ORTAMDA POLİESTER BOYAMANIN YAŞAM DÖNGÜSÜ ANALİZİ İLE DEĞERLENDİRİLMESİ.
- Author
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EREN, Semiha, KARADAĞ, Neslihan, YİĞİT, İdil, and EREN, Hüseyin Aksel
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SUPERCRITICAL carbon dioxide , *WATER shortages , *WATER use , *NATURAL dyes & dyeing , *DYES & dyeing , *TEXTILE industry , *WATER consumption , *SUPERCRITICAL water - Abstract
Water is a valuable resource both for life and because of its properties. Therefore, water scarcity and increasing environmental awareness cause worldwide concern. The textile industry generally consists of processes with intense water consumption. Especially in the dyeing process, a lot of water is used. For this reason, the importance of dyeing studies aimed at reducing water use that increases day by day. In this study, one %100 polyester woven fabrics were dyed in dark and light shade in supercritical carbon dioxide (scCO2) media (waterless) and classic media (aqueous) and the dyeing process was evaluated by life cycle analysis (LCA) method in both media. SimaPro 9.3 program was used for the analysis and it was concluded that the environmental effect of dyeing cumulatively performed in the supercritical medium is less compared to dyeing in a classical aqueous medium, thus it is more advantageous. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
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11. Diseño de un proceso para el reciclaje químico de poliéster
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Carrillo Navarrete, Fernando, González Portilla, Emmanuel, Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Carrillo Navarrete, Fernando, and González Portilla, Emmanuel
- Abstract
El present projecte de final de grau té com a objectiu el disseny d'un procés de reciclatge químic de polièster, enfocat més específicament en les fibres tèxtils de polièster *PET (tereftalat de polietilè), que busca transformar aquestes fibres en productes químics valuosos mitjançant un procés d'hidròlisi alcalina. Buscant com a resultat un procés dissenyat que resulti eficient, sostenible i econòmicament viable. Amb la finalitat de complir amb aquest objectiu s'ha desenvolupat un disseny detallat del procés que inclou la hidròlisi alcalina com a etapa central, definint condicions de reacció i fluxos de procés. A més, dels respectius càlculs dels balanços de matèria i energia per a garantir l'eficiència i la viabilitat del procés, també s'ha dut a terme el disseny dels equips principals. Així mateix, s'ha realitzat una anàlisi econòmica on s'estimen els costos de capital de la planta dissenyada i s'avalua la viabilitat econòmica del projecte. Tot això amb la finalitat d'oferir una solució innovadora i sostenible als desafiaments associats amb l'acumulació de residus tèxtils de polièster en el món contemporani. Aquesta proposta de disseny s'ha fonamentat en una revisió de literatura científica i tècnica disponible que ha servit per al posterior disseny del procés de reciclatge químic del polièster. Finalment, s'ha aconseguit dissenyar un sistema totalment operatiu que compleix la seva funció. No obstant això, les conclusions i resultats obtinguts porten a pensar que actualment, a l'ésser un procés relativament nou que es troba encara en una etapa de desenvolupament i recerca, no es podria definir com un projecte viable, a pesar que el seu benefici va més enllà del merament econòmic. Tanmateix, malgrat l'anteriorment esmentat, s'ha aconseguit obtenir una base sòlida per a la continuació d'aquest treball, amb l'aspiració de promoure canvis positius en la forma en què abordem i valorem els recursos en la indústria tèxtil., El presente proyecto de final de grado tiene como objetivo el diseño de un proceso de reciclaje químico de poliéster, enfocado más específicamente en las fibras textiles de poliéster PET (tereftalato de polietileno), que busca transformar estas fibras en productos químicos valiosos mediante un proceso de hidrólisis alcalina. Buscando como resultado un proceso diseñado que resulte eficiente, sostenible y económicamente viable. Con el fin de cumplir con este objetivo se ha desarrollado un diseño detallado del proceso que incluye la hidrólisis alcalina como etapa central, definiendo condiciones de reacción y flujos de proceso. Además, de los respectivos cálculos de los balances de materia y energía para garantizar la eficiencia y la viabilidad del proceso, también se ha llevado a cabo el diseño de los equipos principales. Asimismo, se ha realizado un análisis económico donde se estiman los costes de capital de la planta diseñada y se evalúa la viabilidad económica del proyecto. Todo esto con la finalidad de ofrecer una solución innovadora y sostenible a los desafíos asociados con la acumulación de residuos textiles de poliéster en el mundo contemporáneo. Esta propuesta de diseño se ha fundamentado en una revisión de literatura científica y técnica disponible que ha servido para el posterior diseño del proceso de reciclaje químico del poliéster. Finalmente, se ha conseguido diseñar un sistema totalmente operativo que cumple su función. No obstante, las conclusiones y resultados obtenidos llevan a pensar que actualmente, al ser un proceso relativamente nuevo que se encuentra todavía en una etapa de desarrollo e investigación, no se podría definir como un proyecto viable, a pesar de que su beneficio va más allá de lo meramente económico. Sin embargo, pese a lo anteriormente mencionado, se ha logrado obtener una base sólida para la continuación de este trabajo, con la aspiración de promover cambios positivos en la forma en que abordamos y valoramos los recursos., The objective of this final degree project is the design of a polyester chemical recycling process, focused more specifically on PET (polyethylene terephthalate) polyester textile fibers, which seeks to transform these fibers into valuable chemical products through an alkaline hydrolysis process. Seeking as a result a designed process that is efficient, sustainable, and economically viable. In order to meet this objective, a detailed design of the process has been developed that includes alkaline hydrolysis as a central stage, defining reaction conditions and process flows. In addition, the respective calculations of the material and energy balances to guarantee the efficiency and viability of the process, and the design of the main equipment has also been carried out. Likewise, an economic analysis has also been carried out where the capital costs of the designed plant are estimated, and the economic viability of the project is evaluated. All this with the aim of offering an innovative and sustainable solution to the challenges associated with the accumulation of polyester textile waste in the contemporary world. This design proposal has been based on a revision of available scientific and technical literature that has for the subsequent design of the polyester chemical recycling process. Finally, it has been possible to design a fully operational system that fulfills its function. Even though, the conclusions and results obtained lead us to think that currently, being a relatively new process that is still in a development and research stage, it could not be defined as a viable project, despite the fact that its benefit goes beyond of the merely economic. However, despite the aforementioned, it has been possible to obtain a solid foundation for the continuation of this work, with the aspiration of promoting positive changes in the way we approach and value resources in the textile industry.
- Published
- 2024
12. Microplastics control in drinking water in Spain and the UE
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Marín Galvín, Rafael and Marín Galvín, Rafael
- Abstract
In the recently approved spanish RD 3/2023 on human consumption water (text transposed from the EU Directive 2020/2184) the so-called observation list is included in its article 19: there are the emerging concern pollutants taking into account their potential health risk for humans. More specifically, in Annex IV of the RD review, section 4, the national observation list is published with the reference to 17b−stradiol, nonilphenol, azithromycin and diclofenac; likewise, it is literally indicated that “microplastics will be included in the list when the European Commission adopts a standardized methodology to measure microplastics in drinking water”. For above, this article will review the position on the subject published by the EU in September 2022 from the agency that deals with this type of issues, the Common Research Center of the European Commission, known by its English acronym JRC. At the same time, we will also refer the situation in Spain. In this way, the main types of MP detected were polyester (PES), polypropylene (PP) and polyethylene (PE), while polystyrene, ABS and polyamide were also detected. At the same time, results at a DWTP were reduced >93% from raw water (0.96 MP/L) after use of sand filtration, granular actived carbon, and reverse osmosis. Finally, concentration found in drinking water was very low, between 0 and 0.05 MP/L, with an average of 0.01 MP/L., En el recientemente aprobado RD español 3/2023 sobre aguas de consumo humano, adaptación de la primitiva Directiva UE 2020/2184, se incluye en su artículo 19 la denominada Lista de Observación que engloba los denominados «contaminantes de preocupación emergente que se consideren un riesgo para la salud». Así, en el apartado 4 del Anexo IV del reseñado RD, se publica la Lista de Observación nacional con las referencias a 17b-Estradiol, nonilfenol, azitromicina y diclofenaco, indicándose literalmente además que «los microplásticos se incluirán en la lista cuando la Comisión Europea adopte una metodología normalizada para medir los microplásticos en el agua de consumo». Este artículo tiene un doble objetivo: (i) pasar revista a la última posición sobre el tema publicada por la UE en septiembre de 2022 desde el organismo que se ocupa de este tipo de cuestiones, el Centro Común de Investigación de la Comisión Europea (conocido por sus siglas inglesas como JRC); (ii) en segundo lugar, se recogerán los más recientes resultados sobre MP en aguas españolas. En este sentido, los tipos de microplásticos (MP, en adelante) mayoritariamente encontrados fueron poliéster (PES), polipropileno (PP) y polietileno (PE), detectándose, asimismo, poliestireno, ABS y poliamida. Además, los MP reducían su concentración en una ETAP desde agua bruta a (0,96 MP/L) tras filtración por arena, carbón activo granular y ósmosis inversa en más del 93 % respecto al agua cruda de entrada a planta. Finalmente, las concentraciones de MP en aguas de consumo fueron muy bajas, entre 0 y 0,05 MP/L, con un promedio de 0,01 MP/L., No recentemente aprovado RD espanhol 3/2023 sobre água para consumo humano, adaptação da primitiva Diretiva da UE 2020/2184, o Artigo 19 inclui a chamada Lista de Observação, que inclui os chamados “poluentes de preocupação emergente que são considerados um risco para a saúde”. Assim, na secção 4 do Anexo IV do referido RD, é publicada a Lista Nacional de Observação com referências ao 17b-Estradiol, ao nonilfenol, à azitromicina e ao diclofenac, indicando também literalmente que“os microplásticos serão incluídos na lista quando a Comissão Europeia adotar uma metodologia padronizada para medir microplásticos em água potável. Este artigo tem um duplo objetivo: (i)rever a última posição sobre o assunto publicada pela UE em setembro de 2022 pelo órgão que trata deste tipo de questões, o Centro Comum de Investigação da Comissão Europeia (conhecido pela sigla em inglês como JRC); (ii)em segundo lugar, serão recolhidos os resultados mais recentes sobre PM em águas espanholas. Nesse sentido, os tipos de PM mais encontrados foram poliéster (PES), polipropileno (PP) e polietileno (PE), sendo também detectados poliestireno, ABS e poliamida. Além disso, o PM reduziu sua concentração em uma ETAP de água bruta para (0,96 MP/L) após filtração através de areia, carvão ativo granular e osmose reversa em mais de 93% em comparação com a água bruta de entrada na planta. Por fim, as concentrações de MP na água potável foram muito baixas, entre 0 e 0,05 MP/L, com média de 0,01 MP/L.
- Published
- 2024
13. Farklı Yapıdaki Kumaşlara Antimikrobiyal Apre Uygulaması ve Etkinliklerinin Karşılaştırılması.
- Author
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Sipahi, Nisa, Akbulut, Ekrem, Yenice, Aysun, and Zengin, Tuğba
- Abstract
Copyright of Duzce University Journal of Science & Technology is the property of Duzce University Journal of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
- View/download PDF
14. Incorporação de resíduos têxteis em polímero de estireno-butadieno-estireno (SBS) com potencial aplicação na fabricação de calçados.
- Author
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Kauer, Robson, Trindade Oliveira, Cláudia, Raquel Kunst, Sandra, Carlos Robinson, Luiz, Luís Schneider, Eduardo, and Dal Pont Morisso, Fernando
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TEXTILE fibers , *COTTON textiles , *FIBER orientation , *TEXTILE waste , *SCANNING electron microscopy , *WEAR resistance - Abstract
Currently, more than 40 types of components are used in the construction of footwear. Among these are cotton and polyester textiles. The objective of this work was to use cotton and polyester textile waste in the development of styrene-butadiene-styrene base (SBS) composites with potential application in the preparation of components for footwear. Thus, the residues were processed in a knife mill and were incorporated in the base formulation in different percentages in a single-screw extruder. The samples were characterized by optical microscopy, scanning electron microscopy, torque rheometry and wear test. The morphological characterization revealed fibers in the form of bundles and loose fibers with random orientation, in addition to the covering of textile fibers. The rheometer showed an increase in the viscosity of the composites as a function of the textile content. The abrasion wear resistance test decreased with the increase of residues within the limits for use in footwear construction. The results show technical potential in the preparation of composites and a promising alternative in the production of components from the waste generating sector itself. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
15. Sorpcijska svojstva enzimski hidroliziranih poliesterskih vlakana tijekom bojadisanja.
- Author
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Kodrić, Marija, Đorđević, Suzana, Tarbuk, Anita, Čorak, Ivana, and Đorđević, Dragan
- Abstract
Copyright of Tekstil: Journal of Textile & Clothing Technology is the property of Croatian Association of Textile Engineers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
16. Effect of Wet Laundering on Stretching and Air Permeability Properties of Polyester Warp Knitted Fabrics with Different Fabric Weights
- Author
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Gizem Karakan Günaydın and Erhan Kenan Çeven
- Subjects
warp knitting ,polyester ,stretching properties ,air permeability ,wet laundering ,çözgülü örme ,poliester ,uzama özellikleri ,hava geçirgenliği ,yıkama ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Warp knitting technology combines the two properties of dimensional stability and elasticity which are provided from woven and knitted fabrics separately. These fabrics consist of several threads (warp) which are formed as loops via needles and run through the fabric mainly in a vertical direction. These fabrics may be produced on a flat or a circular warp knitting machines. This study aims to investigate the influence of washing cycles (1, 5 and 20) on stretching (%) and air permeability properties of the polyester warp knitted fabrics of different weight. In order to analyze the effect of washing process on stretching ratios (%) and air permeability of the samples; Fyrma fabric extensometer and SDL Atlas M021A model Air Permeability Tester devices were used respectively. Additionally, the changes in fabric weight according to washing cycles of 1, 5 and 20 were also evaluated. According to test results; the stretching properties and air permeability values of the polyester warp knitted fabrics produced in different weights varied according to the laundering cycle which emphasized that caring processes should also be considered during the evaluation of mechanical properties (such as stretching, air permeability properties) of polyester warp knitted fabrics.
- Published
- 2018
- Full Text
- View/download PDF
17. Investigation of Durable Bio-polymeric Antimicrobial Finishes to Chemically Modified Textile Fabrics Using Solvent Induction System.
- Author
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Joshi, Shubham, Midha, Vinay, and Rajendran, Subbiyan
- Abstract
Copyright of Tekstilec is the property of University of Ljubljana, Faculty of Natural Sciences & Engineering, Department of Textiles and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
18. Effect of Solvent Treatment on Siro and Ring Spun TFO Polyester Yarn.
- Author
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Regar, Madan Lal, Amjad, Akhtarul Islam, and Joshi, Shubham
- Abstract
Copyright of Tekstilec is the property of University of Ljubljana, Faculty of Natural Sciences & Engineering, Department of Textiles and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
19. Statistical Analysis of Shrinkage Levels of Human Brain Slices Preserved by Sheet Plastination Technique With Polyester Resin.
- Author
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Ottone, Nicolás Ernesto, Guerrero, Marco, Alarcón, Eduardo, and Navarro, Pablo
- Subjects
- *
POLYESTERS , *STATISTICS , *ORGANS (Anatomy) , *GUMS & resins - Abstract
Plastination is currently the most important anatomical preservation technique due to the possibility of preserving bodies and organs for an indefinite period, in a dry and biosecure form, while preserving the morphological characteristics of the tissues. However, the shrinkage of the samples is also part of the plastination, perhaps becoming one of its few disadvantages. This paper presents the shrinkage caused by the classic technique of sheet plastination with polyester resin (Biodur® P40) in human brain slices, with the aim of statistically establishing the percentages of tissue shrinkage caused by this plastination protocol. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
20. Flok Üretimi, Karşılaşılan Hatalar ve Çözüm Önerileri
- Author
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Pelin GÜRKAN ÜNAL
- Subjects
Engineering ,Mühendislik ,Flok ,hata ,süet ,poliamid ,poliester ,üretim ,Fault ,flock ,polyamide ,polyester ,production ,suede - Abstract
Flok, 0,3-5 mm uzunluğunda ve 1,2-28 dtex inceliğine sahip olan kesik elyaftır. Flok, süet kumaş üretiminde, döşemelik kumaş, halı üretimi, giysilik, ayakkabı ve çanta üretimi, otomotiv sektörü, paketleme, kâğıt, karton, oyuncak vb. gibi pek çok alanda kullanılmaktadır. Flok üretildikten sonra floklama işlemine geçilir. Floklama işlemi ise, küçük elyaf parçacıklarının yapışkan kaplı yüzeylere saplanması ve sabitlenmesi işlemidir. Bu işlem esnasında nem miktarı, iletkenlik, elektrostatik alandaki uçma süresi ve topak miktarı gibi proses parametreleri, flok kalitesini etkileyen önemli parametrelerdir. Flok, farklı elyaf kullanarak yapılabilmektedir. Bu çalışma kapsamında flok üretimi bağlamında ayrıntılı bir literatür çalışması gerçekleştirilmiştir. Flok üretiminde önemli olan parametrelerden bahsedilmiş ve üretim sürecinde sık karşılaşılan problem ve çözüm önerileri sunulmuştur., Flock is a staple fiber with a length of 0.3-5 mm and a fineness of 1.2-28 dtex. Flock is used in many fields such as suede, upholstery fabric, carpet production, clothing, shoes and bags, automotive industry, packaging, paper, cardboard, toys, etc. After the flock is produced, the flocking process is started. The flocking process, on the other hand, is the process of sticking and fixing small fiber particles onto adhesive-coated surfaces. During this process, process parameters such as the amount of moisture, conductivity, volatility in the electrostatic field and the amount of clustering are the most important parameters affecting the flock quality. Flock can be made using different fibers. Within the scope of this study, a detailed literature study was carried out in the context of flock production. The parameters that are important in flock production are mentioned and common problems and solution suggestions are presented in the production stages.
- Published
- 2022
- Full Text
- View/download PDF
21. PENGARUH JENIS BAHAN PAKAIAN TERHADAP RESPON FISIOLOGI DAN PSIKOLOGI MANUSIA PADA SAAT BEROLAHRAGA DI LINGKUNGAN PANAS
- Author
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Arnes Faradilla
- Subjects
Respon Fisiologi ,Respon Psikologi ,Katun ,Poliester ,Treadmill ,Industrial engineering. Management engineering ,T55.4-60.8 - Abstract
Abstrak Penyebaran panas (thermal) dan kelembaban/ uap air melalui pakaian melibatkan proses penguapan, kondensasi, penyerapan, dan desorpsi. Pakaian bertindak sebagai penghalang yang menghambat penguapan sehingga pakaian yang memiliki kemampuan penguapan yang baik akan menguntungkan pada saat melakukan berolahraga. Tujuan dari penelitian ini adalah mengetahui respon fisiologi dan psikologi manusia pada saat berolahraga di lingkungan panas. Penelitian dilakukan pada 4 orang laki-laki dengan memakai dua jenis pakaian dengan bahan berbeda, yakni: katun dan poliester pada kondisi temperatur di lingkungan 30°C. Mereka berolahraga menggunakan treadmill dengan kecepatan 7 km/ jam untuk setiap jenis pakaian selama 30 menit, dimana setiap 10 menit melakukan treadmill kemudian istirahat selama 5 menit. Setelah itu, dilakukan proses recovery selama 30 menit sebanyak dua kali. Hasil penelitian menunjukan bahwa kemampuan absorbsi keringat pada saat exercise pada bahan pakaian katun lebih tinggi dibandingkan bahan poliester, sedangkan kemampuan evaporasi keringat ketika proses recovery, bahan pakaian poliester lebih baik dibandingkan katun, sehingga pada saat ini berolahraga, bahan poliester cenderung lebih kering dibandingkan bahan pakaian katun. Untuk respon psikologi, pada saat responden berolahraga menggunakan bahan pakaian katun, mereka merasakan badan lebih terasa panas, basah dan sangat berkeringat. Abstract Thermal and humidity can be transfered using evaporation, condensation and absorption process. Clothing as a mediator to evaporation process. There are many kinds of clothing which can help to evaporating the thermal, especially while exercise. The purpose of this research is to know the Psychological and Physiological responds of human while exercise in hot environment. This research is conducted to four man who using two different kinds of clothing, which are cotton and polyester. The condition of hot environment is 30°C. They are doing exercise using treadmill with speed 7 km/hour for every kind of cloth during 30 minutes; where every 10 minutes is exercise then 5 minutes is break. After that, recovery process is 30 minutes in two times. The result of this research is shown that the ability of sweat absorbtion when exercise using cotton is higher than polyester, and the ability of sweat evaporation when recovery using polyester is more drying rather than using cotton. Polyester is better than cotton when it was used in exercise, because of polyester is easier to be dried. In Psychologycal respond, the respondences said that when using cotton while exercise, they feel the body is more warm, wet and vigorously sweating. Keywords: Pshycological, Phisiological, Cotton, Polyester, Treadmill
- Published
- 2017
- Full Text
- View/download PDF
22. La industria del poliéster en Casariche: Automatización, mano de obra e (in)certidumbre del trabajador
- Author
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Fleta González, Agustín, Universidad de Sevilla. Departamento de Sociología, Romero Fernández, Francisco José, Fleta González, Agustín, Universidad de Sevilla. Departamento de Sociología, and Romero Fernández, Francisco José
- Abstract
El presente trabajo aborda el impacto de la automatización sobre la mano de obra y la forma en que los trabajadores se adaptan a estos cambios. Para ello, centro la mirada en el ámbito local, en los cambios experimentados por la industria del poliéster en la localidad sevillana de Casariche. Adopto la metodología del "estudio de caso" analizando, en primer lugar, las principales características sociodemográficas y económicas del municipio. El trabajo se completa con la realización de entrevistas a diferentes perfiles de actores haciendo especial énfasis en cinco dimensiones: ámbito sociodemográfico, naturaleza de trabajo, condiciones laborales, seguridad y salud laboral y por último, perspectiva de futuro. Los resultados ponen de manifiesto cómo, en este caso concreto, la inserción de la automatización tiene lugar en respuesta a los cambios en el mercado de trabajo. Más que producir transformaciones en la mano de obra, la automatización acudiría a mitigar las consecuencias de cambios en la disponibilidad de la fuerza de trabajo., This paper addresses the impact of automation on the workforce and how workers adapt to these changes. To do so, I focus on the local context, examining the changes experienced by the polyester industry in the town of Casariche, Seville. I adopt the methodology of a "case study," analyzing first the main sociodemographic and economic characteristics of the municipality. The study is complemented by conducting interviews with different actor profiles, placing special emphasis on five dimensions: sociodemographic scope, nature of work, working conditions, occupational safety and health, and finally, future perspective. The results highlight how, in this specific case, the implementation of automation takes place in response to changes in the labor market. Rather than producing transformations in the workforce, automation would help mitigate the consequences of changes in the availability of labor force.
- Published
- 2023
23. Estudi de l'implementació d'estratègies sostenibilistes per a processos de tintura de cotó i polièster: reducció del consum d'aigua, d'energia i de temps
- Author
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Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, Riba Moliner, Marta, Crespí Pascual, Ariadna Aurora, Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, Riba Moliner, Marta, and Crespí Pascual, Ariadna Aurora
- Abstract
Aquest treball tracta d'optimitzar dos processos de tintura tèxtil diferents per esgotament al laboratori de l'empresa Auxicolor: una tintura del cotó amb colorants reactius; i una tintura de polièster amb colorants dispersos. Per aquests dos processos l'objectiu és crear un procés optimitzat on es disminueixi el consum d'aigua i d'energia, a través d'una reducció en el temps del procés i en la temperatura utilitzada. Aquest objectiu neix de la situació de crisi actual en el sector tèxtil a causa de les conseqüències; que encara es pateixen, de la COVID-19 i l'augment en el cost de recursos com l'aigua i el gas. Per validar els processos es comparen els resultats del procés estàndard(el que actualment es fa servir a Auxicolor) amb els obtinguts amb el nou procés proposat. Aquesta comparativa es realitza a través dels valors assolits per colorimetria, les solideses a l'aigua i les solideses al fregament en sec i en humit. Finalment, el procés optimitzat es valida tant pel procés de tintura de cotó amb colorants reactius com pel procés de tintura per polièster amb colorants dispersos. En el cas de la tintura per cotó s'aconsegueix disminuir de 290 minuts el procés estàndard, fins a 225 minuts, aconseguint un estalvi d'aigua d'un 16,67%, i d'energia d’un 18,27%. Per la tintura de polièster, inicialment triga 320 minuts, i optimitzat 200 minuts, és a dir, un 37,50% de temps; pel que fa al consum d’aigua l’estalvi és del 25%; i pel que fa a l'energia l’estalvi és del 18,27%
- Published
- 2023
24. Pasión por lo sintético. El objeto pop en la Barcelona del 'desarrollismo' (1960- 1975)
- Author
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Isabel Campi, Marta González Colominas, and Pilar Mellado Lluch
- Subjects
diseño pop ,pop art ,poliéster ,metacrilato ,André Ricard ,Miguel Milà ,Drawing. Design. Illustration ,NC1-1940 ,Arts in general ,NX1-820 - Abstract
El diseño pop fue durante los años sesenta y principios de los años setenta la expresión de la cultura juvenil, reflejada en una pasión por los materiales sintéticos y los entornos artificiales. En España, este fenómeno transcurrió en el conflictivo periodo del llamado “desarrollismo”, durante el régimen militar del general Franco. El pop tuvo en Cataluña una expresión vivaz pero industrialmente limitada. Los diseñadores André Ricard, Miguel Milá, Jordi Galí y Rafael Carreras, entre otros, se prestaron con profesionalidad a experimentar con el poliéster, el metacrilato y el ABS. Este artículo se propone rescatar un fenómeno de modernización poco estudiado y culturalmente muy significativo.
- Published
- 2019
- Full Text
- View/download PDF
25. Caracterización físicotérmica de un compósito de fibra de Cocos Nucifera y resina poliéster para su aplicación en la construcción.
- Author
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Tun Dzul, Efrain, Domínguez Lepe, José Antonio, Castillo Ávila, Set Jubal, Cruz Argüello, Julio Cesar, and Trejo Arroyo, Danna Lizeth
- Abstract
Copyright of Congreso Internacional de Investigacion Academia Journals is the property of PDHTech, LLC and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
26. Poluarea cu microplastice - un pericol global real.
- Author
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Țîntoc, Alina, Pîntea, Ioana, Bălan, Elena, Manea, Alina-Silviana, Orbeanu, Janina, Neacșu, Sorinel Marius, and Mititelu, Magdalena
- Subjects
- *
WATER pollution , *PLASTIC marine debris , *SEWAGE disposal plants , *POLYESTER fibers , *SEWAGE sludge , *POLLUTION management - Abstract
Plastic pollution in the oceans and inland waters is a serious problem that affects not only the aquatic environment, but also humans. People are potentially exposed to microplastics through food, drink and air. Polyester fiber is one of the most abundant types of microplastics in the environment. Much of the fiber that enters wastewater treatment plants reaches sewage sludge, which is used as soil fertilizer in many countries. Therefore, preventive and corrective measures should be taken at international, governmental and consumer level to assess the toxicity of common polymers, to reduce the use of plastic and to encourage the use of alternative materials, recycling and the adoption of sustainable practices in the use of plastics and plastic pollution management. There is growing evidence that microplastic pollution (plastic particles below 5 mm in size) is now present in almost all marine ecosystems, even in remote areas, such as the Arctic and Antarctic. Once released into the marine environment, the ecological fate of microplastics primarily depends on the density of the polymer that influences buoyancy, position in the water column and possible interaction with the biota. [ABSTRACT FROM AUTHOR]
- Published
- 2020
27. Adhesion improvement at polyester fabric-silicone rubber interface by plasmas of argon and air to obtain conveyor belt.
- Author
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SARI, Y. BERRAK and KUTLU, BENGI
- Subjects
SILICONE rubber ,ARGON plasmas ,CONVEYOR belts ,POLYESTERS ,ADHESION ,POLYESTER fibers ,ATOMIC force microscopy - Abstract
Copyright of Industria Textila is the property of Institutul National de Cercetare-Dezvoltare pentru Textile si Pielarie and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
- View/download PDF
28. Crimping analysis of textured polyester multifilament yarn.
- Author
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STEPANOVIĆ, JOVANA, ŠARAC, TATJANA, RADMANOVAC, NATAŠA, TRAJKOVIĆ, DUŠAN, and STEPANOVIĆ, JOVAN
- Subjects
YARN ,POLYESTERS ,POLYETHERSULFONE ,POLYESTER fibers - Abstract
Copyright of Industria Textila is the property of Institutul National de Cercetare-Dezvoltare pentru Textile si Pielarie and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
- View/download PDF
29. ETİLEN OKSİT, OTOKLAV VE ULTRA VİYOLE STERİLİZASYONLARIININ PET ELEKTROÇEKİM LİFLERİN YÜZEY TOPOGRAFİSİ ÜZERİNE ETKİSİ
- Author
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Sebnem Duzyer, Asli Hockenberger, Agah Uguz, Elif Evke, and Zeynep Kahveci̇
- Subjects
elektroçekim lif ,poliester ,sterilizasyon ,karakterizasyon ,electrospun fiber ,polyester ,sterilization ,characterization ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Bu çalışmanın amacı farklı sterilizasyon metodlarının elektroçekim polyester lifleri üzerindeki etkisini incelemektir. PET lifleri; ağırlıkça %10,15 ve 20 oranında polietilen tereftalat (PET) içeren çözeltilerden elektroçekim yöntemiyle üretilmiş ve etilen oksit (EO), otoklav (AU) ve ultraviyole (UV) ile sterilize edilmiştir. Üretilen yüzeylerin yüzey karakterizasyonu taramalı elektron mikroskobu (SEM), atomik kuvvet mikroskobu (AFM), yüzey gözeneklilik boyutu analizleri ve temas açısı ölçümleriyle gerçekleştirilmiştir. Yüzeylerin termal özellikleri Diferansiyel taramalı kalorimetre (DSC) testleri; mikro yapısal özellikleri Fourier Transform Infrared spektroskopisi (FTIR) ile araştırılmıştır. SEM çalışmaları farklı sterilizasyon yöntemlerinin, polimer konsantrasyonuna bağlı olarak büyük değişikliklere neden olduğunu göstermiştir. Artan polimer konsantrasyonu ile yöntemlerin etkileri azalma gösterse de, lif yapısı -özellikle EO sterilizasyonunda oldukça zarar görmüştür. Temas açısı değerlerinde UV sterilizasyonu sonrası büyük düşüş görülmüştür.
- Published
- 2016
- Full Text
- View/download PDF
30. EFFECT OF POLIESTER POY FIBRE CROSS-SECTION ON THE YARN PROPERTIES OF AIRJET TEXTURING
- Author
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CANOGLU Suat and YUKSELOGLU S. Muge
- Subjects
Poliester ,Air-jet ,Textured yarn ,Mechanocal properties ,Cross-section ,Manufactures ,TS1-2301 - Abstract
POY yarns are well know and commercialized since 1970s. On the other hand, air-jet textured yarns are very common due to their unique structure which looks like natural spun-staple yarns. In the air-jet texturing process, the yarn is textured by overfeeding into a high-pressure of air to create a looped and more natural yarn appearance and also the bulkiness level of the yarn is controlled by input speed and jet-take out speed. This process reassigns flat, continous synthetic yarns into entangled, convoluted, bulky, spun like structured yarns. They are of higher bulk, exhibits increased covering power, have a more subdued lustre and are warmer in hand. Therefore, air-jet textured yarns possess some unique properties that require investigation. Hence, in this study, first the texturing process is introduced briefly and its principle of manufacturing is illustrated, later four different types of yarns were produced with two different fibre cross-sections at the three different nozzle types and three different core yarn feeding. The produced yarn production details are given and their breaking strength, elongation and work of rupture are studied along with their morphological structures by using light microscope and SEM. The aim of this study is to investigate the effect of POY fibre cross-section on air-jet textured yarn mechanical properties. The overall results showed that coarser air-jet textured yarns with a round shape have higher breaking strength, elongation and work of rupture than the trilobal shaped yarns. On the other hand, half matted yarn which was applied TiO2 has also presented better breaking strength and elongation.
- Published
- 2016
31. In situ sinteza nanodelcev ZnO s pomočjo fitokemikalij in plinske plazme za doseganje večfunkcionalnih lastnosti tekstilij
- Author
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Verbič, Anja and Gorjanc, Marija
- Subjects
in situ synthesis ,cinkov oksid ,večfunkcionalnost ,green synthesis ,plazma ,zinc oxide ,bombaž ,cotton ,in situ sinteza ,zelena sinteza ,ZnO ,poliester ,polyester ,multifunctional ,plasma - Abstract
V doktorski disertaciji je predstavljena raziskava razvoja novega okolju prijaznega postopka in situ sinteze delcev cinkovega oksida (ZnO) na bombažu (CO) in poliestru (PET), kjer so bili namesto kemičnih reducentov uporabljeni vodni ekstrakti odpadnega rastlinskega materiala (invazivne tujerodne rastline in živilski odpadki) in namesto kemične alkalije uporabljen vodni ekstrakt lesnega pepela. Receptura in situ sinteze ZnO je bila optimizirana s proučevanjem različnih metod sinteze in vplivov parametrov sinteze (vrsta in koncentracija prekurzorja in »zelenih« reducentov, vrsta reducenta, vrstni red reagentov pri sintezi, čas in temperatura sinteze). Zaradi različne vsebnosti fenolnih skupin (TPC) »zelenih« reducentov, ki vplivajo na stopnjo antioksidativnosti in redukcijske sposobnosti reducenta, se je kot ključni parameter za uspešno oblikovanje ZnO direktno na CO in enakomerno porazdelitev po vlaknih ter odlično sposobnost tkanine blokiranja ultravijoličnega (UV) sevanja (50+), izkazal vrstni red reagentov (Alkalija–Zn-prekurzor–Reducent). Cinkov acetat je bolj primeren prekurzor za sintezo na CO kot cinkov nitrat, saj se s slednjim mehanske lastnosti tkanine močno poslabšajo. Ugotovljeno je bilo, da se lahko glede na uporabljen »zeleni« reducent prilagodi tudi omočljivost CO, in sicer reducenti z višjo vsebnostjo TPC omogočajo hidrofilne lastnosti, tisti z nižjo vsebnostjo TPC pa hidrofobne. Pri sinteznem postopku na PET je bila vpeljana plazma kisika za povečanje reaktivnost tkanine do reakcijskih raztopin in kasneje kot zamenjava alkalije. S plazmo se je povečala hidrofilnost PET in enakomerna adsorpcija reagentov, kar je omogočilo homogenost in situ sintetiziranih ZnO po celotni tkanini oz. vlaknih. Pri tem se je s številom plazemskih obdelav višala tudi UV zaščita tkanine, kot posledica zvišanja vsebnosti ZnO. Tako alkalija kot plazma kisika vplivata na povečanje aktivnih mest na PET, ki predstavljajo nukleacijska mesta prekurzorja za oblikovanje ZnO s pomočjo »zelenega« reducenta. S stališča čim bolj okolju prijazne in situ sinteze ZnO, zmanjšanja porabe vode, časa priprave reagentov in homogenosti in situ sintetiziranih ZnO na tkanini, se namesto alkalije lahko uporabi plazma kisika. This doctoral dissertation presents the development of a novel, environmentally friendly process for in situ synthesis of zinc oxide (ZnO) on cotton (CO) and polyester (PET) using aqueous extracts of invasive alien plants and food waste instead of classical chemical reducing agents, and aqueous extract of wood ash instead of chemical alkali. The ZnO synthesis procedure was optimised by studying different synthesis methods and parameters (type and concentration of precursor and »green« reducing agent, the order of synthesis solutions, synthesis time and temperature). Due to the different amounts of phenolic compounds (TPC) present in the »green« reducing agents, the order of the synthesis solutions (Alkali䀒Precursor-Reducing agent) proved to be a key parameter influencing the successful in situ synthesis and the uniform distribution of ZnO particles on fibres and consequently achieving the excellent ultraviolet (UV) protective properties (50+) of the CO fabric. Zinc acetate is a more suitable precursor for the in situ synthesis of ZnO than zinc nitrate, since with the latter, mechanical properties of the fabric are greatly impaired. Depending on the »green« reducing agent used, the wettability of the CO fabric can be adjusted. The reducing agents with higher TPC values enable hydrophilic properties, while the ones with lower TPC values enable hydrophobic properties of the CO. Oxygen plasma treatment was incorporated into the synthesis process on PET, first to increase the reactivity of PET to the synthesis solutions, and finally as a substitute for alkali. Plasma increased the hydrophilicity of PET and enabled an even adsorption of the reagents, resulting in uniform distribution of the in situ synthesised ZnO on the fabric. As the number of plasma treatments increased, the UV protection of fabrics also increased, due to higher ZnO content. Both alkali and oxygen plasma increase the amount of active binding sites on PET, which represent precursor nucleation sites for the formation of ZnO using »green« reducing agent. From the point of view of the most environmentally friendly in situ synthesis of ZnO, reduction of water consumption, preparation time for reagents and homogeneity of in situ synthesized ZnO on the fabric, oxygen plasma can be used instead of alkali.
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- 2023
32. Primarni osjetni indeksi starene poliesterske tkanine
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Šaravanja, Ana, Dekanić, Tihana, Pušić, Tanja, Kaurin, Tea, Vujasinović, Edita, and Dekanić, Tihana
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Poliester ,umjetno starenje ,površinska struktura poliestera ,ocjene udobnosti - Abstract
Općepoznato je da je čovjek svojim nekontroliranim i nepažljivim ponašanjem utjecao na ravnotežu u životnom ciklusu Zemlje. Uvidom u problematiku procjene otpuštanja mikroplastike iz poliesterske tkanine, postalo je važno proučavati i površinsku strukturu same tkanine. Utjecaj atmosferilija, kao što je sunčeva energija, vlaga ili oborine dodatno oslabljuju poliestersku tkaninu čime povećavaju otpuštanje mikroplastike. Zbog dugotrajnog ispitivanja u realnim vanjskim uvjetima te u svrhu njihove ubrzane simulacije, standardna poliesterska tkanina je podvrgnuta procesu umjetnog starenja. Umjetno starena poliesterska tkanina karakterizirana je na uređaju za mjerenje opipa tkanine Fabric Touch Testeru, tzv. FTT. Na standardnoj te starenoj standardnoj poliesterskoj tkanini mjereni su moduli i fizikalna svojstva povezana s opipom. Za svaku stranu tkanine upotrijebljeni su indeksi koji se koriste za predviđanje subjektivnog primarnog osjeta. Analiza tkanine starene u okviru ovog rada u odnosu na standardnu poliestersku tkaninu nije dala neke značajnije promjene kojima bi se ušlo u dubinu karakterizacije parametara koje nudi FTT. Iako nisu postignuti očekivani rezultati, ova analiza je dala smjernice za daljnja istraživanja. Jedna od ideja je produžiti vrijeme izlaganja procesu umjetnog starenja, te obuhvatiti različite parametre poput načina izlaganja i utjecaj atmosferilija.
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- 2023
33. EVALUACIÓN DE BOLSAS PLÁSTICAS PARA EL ENVASADO DE QUESO MOZZARELLA AL VACÍO.
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Bejerano-Salgado, Danilo, Rodríguez, Ariel, Pacheco, Divina, and Bolumen, Soledad
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- *
WATER vapor , *MOZZARELLA cheese , *ORGANIC solvents , *POLYESTERS , *PLASTIC bags - Abstract
The plastic bag used in the packaging of mozzarella cheese was characterized, for which the quality of the bag was evaluated through its identification by the method of solubility in organic and inorganic solvents, the quality of sealing by the colorful solution method, the determination of the speed of transmission to water vapor by the method gravimetric, dimensions and thickness. The results of the functional length and width presented average values of 396 mm and 374 mm respectively, the material proved to be made up of two flexible layers with a total thickness of 67.17 μm; an inner layer of polyethylene with a thickness of 47 μm and an outer layer of polyester with a thickness of 21 μm. The transmission speed to water vapor of the container was 2.33 g/m2d. [ABSTRACT FROM AUTHOR]
- Published
- 2020
34. Pasión por lo sintético. El objeto pop en la Barcelona del "desarrollismo" (1960-1975).
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Campi Valls, Isabel, González Colominas, Marta, and Mellado Lluch, Pilar
- Abstract
Copyright of Immaterial is the property of BAU, Centro Universitario de Diseno de Barcelona and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
35. Kompozit malzeme üretiminde kullanılan poliesterlerin mekanik, termal ve kimyasal özelliklerine başlatıcı etkisinin incelenmesi.
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Eren, Şevki, Poyraz, Bayram, Gökçe, Neslihan, Şamandar, Ayhan, Aykanat, Batuhan, and Subaşi, Serkan
- Abstract
Unsaturated polyester (UP) resins, used as a matrix material in polymer based composite, has been extensively utilized in industry due to the fact that revealing high mechanical properties, rapid curing, endurance against chemical substances and physical conditions. Determination of the optimum ratio of inititator (curing agent), requiring for polymerization process is of great importance for the production of composite material having desirable mechanical properties. For this purpose, the physical, chemical, thermal and mechanical properties of the polyesters used in the production of composite materials were investigated by using initiators at different ratios. In scope of the study, orthophtalic and isophtalic resins (polymer based resin) were used as a resin. During polymerization procees, methyl ethyl keton peroxide (MEKP) has been used as initiator (curing agent) with different the ratio; 1%, 1.5%, 2% ve 2.5%. Cobalt octaoate (C16H30CoO4) was added as catalyst (accelarating) in the rate of 1% to increase curing rate and yield of polymerization. To determine physical parameters, gelation temperature, gelation time, peak exotherm temperature and viscosity analysis were carried out. Thermogravimetric analyzes (TGA) were performed to determine thermal stability. Fourier transform Infrared Spectroscopy (FT-IR) was used to investigate the molecular interaction in the end of the polymerization. Mechanical properties (tensile strength, elastic modulus, flexture strength and flexture modulus) were determined with the Universal Test Machine. The initiator and resin ratio which have optimum parameters and performance were determined by evaluating the results obtained from experimental studies. As a result, the mechanical properties of the unsaturated polyester resin were changed based on initiator ratio. When the relation between initiator ratio and the mechanical properties is examined, mechanical strengths of the composites which composed of the isophthalic resin generally have higher than the composites composed of the orthophtalic resin. Optimum initiator ratio for mechanical strength values were determined as 1% for the composite obtained from both isophtalic and orthophtalic resins. [ABSTRACT FROM AUTHOR]
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- 2018
- Full Text
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36. Remoción de hemicelulosa en fibras de Curaua (Ananas erectifolius) para compósitos de poliéster.
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Rodrígues, Beatriz S., García, Rafael M., Leão, Rosineide M., Amico, Sandro C., and Luz, Sandra M.
- Abstract
Introduction: Alkaline treatments extract hemicellulose from the fibers, which can be reused in the manufacture of other materials, and the cellulosic portion can be applied as reinforcement in a composite. This way, all components of the fibers are utilized. Method: In this work, curaua fibers (Ananas erectifolius) were treated with potassium hydroxide (KOH) to solubilize part of the hemicellulose and lignin, and the cellulose-rich fibers were used to manufacture composites with unsaturated polyester, which were characterized to investigate the effect of the treatment on their properties. Results: The alkaline treatment removed large portions of hemicellulose and significantly degraded the crystalline cellulose and lignin, resulting in a small increase (2.4%) in overall crystallinity and with a negative impact on their thermal stability. SEM images showed defibrillation of the treated fiber and fibril separation, increasing roughness and surface contact area. Conclusions: In all, although the alkaline treatment substantially modified the fibers and no significant changes were observed in the mechanical properties of the composite, the total removal of hemicellulose was found to affect the integrity of cellulose fibers making harder their application as reinforcement. However, the higher cellulose content could be useful for other applications. [ABSTRACT FROM AUTHOR]
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- 2018
- Full Text
- View/download PDF
37. Vpliv substrata in nanosa tiskarske barve na delovanje RFID-anten.
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Klančnik, Maja, Rijavec, Brigita, Pivar, Matej, and Muck, Deja
- Abstract
Copyright of Tekstilec is the property of University of Ljubljana, Faculty of Natural Sciences & Engineering, Department of Textiles and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
- Full Text
- View/download PDF
38. Lamination of starch/polyesters by thermocompression for food packaging purposes
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Carla I. La Fuente Arias, Chelo González-Martínez, and Amparo Chiralt
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POLIÉSTER - Abstract
Multilayer films were obtained by thermocompression to design laminates with better fit food packaging requirements. Films of glycerol-plasticised corn starch, both non-modified and modified by dry heating (DH) or PHBV layers containing 0, 10 or 20% PEG 1000 were combined with amorphous PLA sheets. Combinations of starch-PLA-PHBV tri-layers were also obtained and characterised as to their functional properties for the first time. The surface tension of the different polymer films was determined to estimate the adhesion work (Wa) of each polymer pair, which was compared to the experimental seal strength (SS). The analyses of the functional properties of the mono, bi- and tri-layers revealed a marked reduction in the water vapour permeability of starch films by DH modification while PEG weakened the strength of PHBV films and greatly increased their oxygen permeability. An overall improvement was observed in the functional properties of PLA-starch laminates with respect to the monolayers, although PLA-PHBV combinations and tri-layers did not offer great additional benefits as compared to the individual non-plasticised PHBV films. The interlayer migration of plasticisers, including the water present in starch films, altered the expected tensile and barrier properties of multilayers, which resulted in advanced materials with unique characteristics.
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- 2022
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39. Estudo de painéis sanduíches de poliéster reforçado com fibras vegetais para aplicação como forro
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Ferreira, Monise Ramos da Silva, Cunha, Jesiel, Motta, Leila Aparecida de Castro, Silva, Turibio José da, and Lima, Paulo Roberto Lopes
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Sponge gourd ,Forro ,Placas (Engenharia) ,Sandwich panel ,Polyester ,Compósitos poliméricos ,Composite ,Rami ,Compósitos ,Ramie ,ENGENHARIAS::ENGENHARIA CIVIL [CNPQ] ,Ceiling ,Bucha vegetal ,Painel sanduíche ,EPS ,Poliéster - Abstract
The purpose of the work is to produce and characterize mechanically sandwich panels to using as ceiling in buildings. The faces of the panels were made of composites reinforced by ramie and sponge gourd fibers, and the cores were made of sponge gourd and expanded polystyrene-EPS. The faces of the sandwich panels were produced with different fiber contents, characterized for tensile mechanical properties and numerically simulated. The EPS and sponge gourd were studied as core materials. The flexural mechanical performance of the panels was tested experimentally and simulated by Finite Element Method. The numerical simulation was also used as tool for qualitative analyzes in the pre-design of the panel components considering variation of materials, fiber contents and thickness of faces and cores. The faces of the sandwich panels were manufactured with composite of polyester reinforced by ramie bidirectional cloth, and combined with the cores of EPS and sponge gourd. The results show the manufactured sandwich panels are feasible for use as ceiling. O objetivo deste trabalho é produzir e caracterizar mecanicamente painéis sanduíches para uso como forro em edificações, a partir de compósitos de poliéster reforçado com fibras vegetais de rami e bucha vegetal, e núcleos constituídos de bucha vegetal impregnada de resina poliéster e poliestireno expandido - EPS. Os compósitos foram produzidos com diferentes teores de fibras, caracterizados mecanicamente à tração e testados numericamente como constituintes das faces do painel sanduíche. O EPS e a bucha vegetal foram estudados como componentes de núcleo dos painéis. O desempenho mecânico à flexão dos painéis foi testado experimentalmente e pelo Método dos Elementos Finitos. A simulação numérica foi usada também como ferramenta de análises qualitativas para o pré-dimensionamento dos componentes dos painéis, com variação de materiais, teores de volumes de fibras dos compósitos e espessuras de faces e núcleos. As faces dos painéis sanduíches foram constituídas com o compósito de matriz de poliéster reforçada com o tecido bidirecional de fios de rami e combinadas com os núcleos de EPS e bucha vegetal. Os resultados obtidos permitiram concluir que é viável a utilização dos painéis sanduíches estudados para uso como forro. Meste em Engenharia Civil
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- 2022
- Full Text
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40. Propuesta de placas de yeso laminado para tabiques autoportantes con material reciclado procedente de bayetas de microfibras sintéticas
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Pérez Gálvez, Filomena, Ruiz Etayo, Carlos, Pérez Gálvez, Filomena, and Ruiz Etayo, Carlos
- Abstract
El reciclaje de todo tipo de productos y materiales se ha convertido en una de las acciones más importantes en la sociedad actual. Este trabajo se centra en el reciclaje de bayetas de microfibras sintéticas para el ámbito de la arquitectura, así como la reducción de contaminación y residuos gracias a estas. Se estudiarán las capacidades físicas y mecánicas, de dicho material, en una matriz de yeso y se comprobará la respuesta de estas a distintos tipos de ensayos. Para ello se realizarán probetas con tres porcentajes de aditivos distintos (1%, 1,5% y 2% del peso) las cuales se someterán a ensayos de peso, densidad aparente, capacidad a flexión y capacidad a compresión. El análisis de los resultados obtenidos indica la viabilidad del producto sintético en rehabilitaciones, concretamente en placas de yeso laminado en tabiques autoportantes, gracias a su disminución en el peso y la densidad, con respecto a otros materiales comercializados., The recycling of all kinds of products and materials has become one of the most important actions in today's society. This work focuses on the recycling of synthetic microfiber cloths for the field of architecture, as well as the reduction of pollution and waste thanks to these. The physical and mechanical capacities of this material in a gypsum matrix will be studied and the response of these to different types of tests will be checked. To do this, specimens will be made with three percentages of different additives (1%, 1.5% and 2% of the weight) which will be subjected to tests of weight, bulk density, bending capacity and compression capacity. The analysis of the results obtained indicates the viability of the synthetic product in rehabilitations, specifically in laminated plasterboard in self-supporting partitions, thanks to its decrease in weight and density with respect to other materials marketed.
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- 2022
41. Recuperació de la cel·lulosa provinent de teixits polièster/cotó a partir de la utilització de líquids iònics
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Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, Lis Arias, Manuel José, Riba Moliner, Marta, Villalta Boza, Emma, Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, Lis Arias, Manuel José, Riba Moliner, Marta, and Villalta Boza, Emma
- Abstract
El consum de tèxtil per habitant creix de manera exponencial, de manera que, el desenvolupament de nous processos sobre la gestió i els tractaments de residus tèxtils resulta una oportunitat clau per aconseguir models integrals d’economia circular que assegurin el tancament dels cicles. Actualment, es calcula que aproximadament un 80% dels residus tèxtils generats estan constituïts per fibres de cotó (CO) i polièster (PES). L’heterogeneïtat en els residus tèxtils és tot un repte per a la indústria tèxtil, per la qual cosa en aquest projecte s’estudia la recuperació de la cel·lulosa provinent de teixits PES/CO a partir de l’ús de líquids iònics (ILs). Inicialment s’analitza l’efecte dels líquids iònics sobre la superfície del teixit, determinant els factors influents referents a l’entrada del IL a l’interior del teixit i el mecanisme químic que governa el sistema. En aquest projecte es contempla l’estudi de les variables de temps, ràtio i temperatura del sistema, amb l’objectiu de definir quina d’elles té una major influència sobre el procés. S’avalua la capacitat dels líquids iònics, en concret de l’AmimCl, per a dissoldre la cel·lulosa i posteriorment regenerar la matèria mitjançant una simulació del procés wet spinning. El medi d’inflament de la fibra, aigua o DMSO, també ha estat un altre factor estudiat, examinant així la influència de cada dissolvent i les interaccions quan entren en contacte amb el líquid iònic. Finalment, de la matèria regenerada es caracteritza la seva estructura superficial a partir del microscopi electrònic d’escombratge (SEM), la seva estructura molecular mitjançant un anàlisis d’espectroscòpia infraroja (FTIR) i la seva estabilitat tèrmica amb un anàlisi termogravimètric (TGA)., El consumo de textil por habitante crece de manera exponencial, de manera que, el desarrollo de nuevos procesos sobre la gestión y los tratamientos de residuos textiles resulta una oportunidad clave para conseguir modelos integrales de economía circular que aseguren el cierre de ciclos. Actualmente, se calcula que aproximadamente un 80% de los residuos textiles generados están constituidos por fibras de algodón (CO) y poliéster (PES). La heterogeneidad en los residuos textiles es todo un reto para la industria textil, por lo que en este proyecto se estudia la recuperación de la celulosa proveniente de tejidos PES/CO a partir del uso de líquidos iónicos (ILs). Inicialmente se analiza el efecto de los líquidos iónicos sobre la superficie del tejido, determinando los factores influyentes referentes a la entrada del IL en el interior del tejido y el mecanismo químico que gobierna el sistema. En este proyecto se contempla el estudio de las variables de tiempo, ratio y temperatura del sistema, con el objetivo de definir cuál de ellas tiene una mayor influencia sobre el proceso. Se evalúa la capacidad de los líquidos iónicos, en concreto del AmimCl, para disolver la celulosa y posteriormente regenerar la materia mediante una simulación del proceso wet spinning. El medio de inflamiento de la fibra, agua o DMSO, también ha sido otro factor estudiado, examinando así la influencia de cada disolvente y las interacciones cuando entran en contacto con el líquido iónico. Finalmente, de la materia regenerada se caracteriza su estructura superficial a partir del microscopio electrónico de barrido (SEM), su estructura molecular mediante un analisis de espectroscopia infrarroja (FTIR) y su estabilidad térmica con un analisis termogravimétrico (TGA)., Textile consumption per inhabitant is growing exponentially, and therefore the development of new processes related to the management and treatment of textile waste is a key opportunity to achieve comprehensive circular economy models that ensure the closure of cycles. Nowadays, it has been estimated that approximately an 80% of the textile waste generated is composed of cotton (CO) and polyester (PES) fibers. The heterogeneity in the textile waste is a huge challenge for the textile industry, and for this reason this project studies the recovery of cellulose coming from textile fabrics composed of PES/CO making use of ionic liquids (ILs). Initially, the effect of ionic liquids on the surface of the textile is analyzed, determining the influencing factors related to the entry of IL inside the textile and the chemical mechanism that controls the system. This project considers the study of the time, ratio, and temperature variables of the system, with the aim of defining which of them has a greater influence on the process. The ability of ionic liquids, specifically AmimCl, to dissolve cellulose and subsequently regenerate the material through a simulation of the wet spinning process is evaluated. The responsible for the fiber’s inflation, water or DMSO, has also been another factor of study, analyzing the influence of each solvent and the interactions when in contact with the ionic liquid. Finally, the regenerated substance is characterized by: its surface structure using the scanning electron microscope (SEM), its molecular structure by infrared spectroscopy analysis (FTIR) and its thermal stability by thermogravimetric analysis (TGA).
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- 2022
42. Estudi sobre la influència de la fibra reciclada de polièster sobre la intensitat de color
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Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, Riba Moliner, Marta, Cayuela Marín, Diana, Valldeperas Soley, Pol, Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, Riba Moliner, Marta, Cayuela Marín, Diana, and Valldeperas Soley, Pol
- Abstract
La producció de fibres de polièster ha estat present i en augment des de la seva sortida al mercat l’any 1951, sent una de les fibres amb major nombre d’aplicacions. Tot i les grans avantatges que ofereix, el procés d’obtenció, es dur a terme a partir de productes químics derivats del petroli o del gas natural. És per això que aquest projecte té com a objectiu l’estudi de la relació de la composició de teixits de polièster amb diferents percentatges de fibres de polièster verge i de polièster reciclat a la intensitat de color. S’han filat i teixit diverses mostres amb diferents percentatges de fibra reciclada i s’han sotmès a un procés de termofixat i una tintura per termosol amb les mateixes condicions. Finalitzat el procés, es sotmeten les mostres en el colorímetre i s’estudia les possibles variacions del color obtingut per determinar el possible afecte de les fibres de polièster reciclat en el resultat final. Addicionalment, també s’intentarà correlacionar la microestructura dels diferents fils amb el percentatge de fibres de polièster reciclada a partir d’un estudi diferencial d'escombrat. Amb els termogrames resultants, s’estudia la possible variància de propietats en funció del procés aplicat en la mostra i també en funció del percentatge de fibra reciclada de la mostra
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- 2022
43. SÜPERKRİTİK VE KLASİK ORTAMDA POLİESTER BOYAMANIN YAŞAM DÖNGÜSÜ ANALİZİ İLE DEĞERLENDİRİLMESİ
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Semiha EREN, Neslihan KARADAĞ, İdil YİĞİT, Hüseyin Aksel EREN, Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü., Eren, Semiha, Yiğit, İdil, and Eren, Hüseyin Aksel
- Subjects
Classical dyeing ,Malzeme Bilimleri, Tekstil ,Klasik boyama ,Life cycle analysis (LCA) ,Poliester ,Polyester ,Yaşam döngüsü analizi (LCA) ,Waterless (scCO2) dyeing ,Materials Science, Textiles ,General Medicine ,polyster ,classical dyeing ,waterless (scCO2) dyeing ,Life Cycle Analysis (LCA) ,Susuz (scCO2) boyama ,poliester ,klasik boyama ,susuz (scco2) boyama ,Yaşam Döngüsü Analizi (LCA) - Abstract
Su hem yaşam için hem de sahip olduğu özellikleri nedeniyle de değerli bir kaynaktır. Bu nedenle, su kıtlığı ve artan çevre bilinci dünya çapında endişeye sebep olmaktadır. Tekstil sektörü genel olarak su tüketiminin yoğun olduğu proseslerden oluşmaktadır. Özellikle boyama işleminde çok fazla su kullanılmaktadır. Bu sebeple su kullanımının azalmasına yönelik boyama çalışmaların her geçen gün öneminin artacağı görülmektedir. Bu çalışmada, süperkritik karbondioksit (scCO2) ortamda susuz ve klasik sulu ortamda bir adet % 100 poliester dokuma kumaş açık ve koyu tonda olmak üzere boyanmış, boyama proseslerinin aşamaları her iki ortam için de yaşam döngüsü analizi (LCA) yöntemi ile değerlendirilmiştir. Analiz için SimaPro 9.3 programı kullanılmış ve yapılan karşılaştırma kümülatif olarak süperkritik ortamda yapılan boyamada çevresel etkinin klasik sulu ortamda boyamayla karşılaştırıldığında göre daha az olduğu dolayısıyla daha avantajlı olduğu sonucuna varılmıştır., Water is a valuable resource both for life and because of its properties. Therefore, water scarcity and increasing environmental awareness cause worldwide concern. The textile industry generallyconsists of processes with intense water consumption. Especially in the dyeing process, a lot of water is used. For this reason, the importance of dyeing studies aimed at reducing water use that increases day by day. In this study, one %100 polyester woven fabrics were dyed in dark and light shade in supercritical carbon dioxide (scCO2) media (waterless) and classic media (aqueous) and the dyeing process was evaluated by life cycle analysis (LCA) method in both media. SimaPro 9.3 program was used for the analysis and it was concluded that the environmental effect of dyeing cumulatively performed in the supercritical medium is less compared to dyeing in a classical aqueous medium, thus it is more advantageous..
- Published
- 2022
44. Recuperació de la cel·lulosa provinent de teixits polièster/cotó a partir de la utilització de líquids iònics
- Author
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Villalta Boza, Emma, Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, Lis Arias, Manuel José, and Riba Moliner, Marta
- Subjects
Ions ,Polièster ,Enginyeria química [Àrees temàtiques de la UPC] ,Residus tèxtils ,Enginyeria tèxtil [Àrees temàtiques de la UPC] ,Polyesters ,Polièsters ,Cotó ,Cel·lulosa ,Líquids iònics ,Reciclatge químic ,Cotton ,Textile waste - Abstract
El consum de tèxtil per habitant creix de manera exponencial, de manera que, el desenvolupament de nous processos sobre la gestió i els tractaments de residus tèxtils resulta una oportunitat clau per aconseguir models integrals d’economia circular que assegurin el tancament dels cicles. Actualment, es calcula que aproximadament un 80% dels residus tèxtils generats estan constituïts per fibres de cotó (CO) i polièster (PES). L’heterogeneïtat en els residus tèxtils és tot un repte per a la indústria tèxtil, per la qual cosa en aquest projecte s’estudia la recuperació de la cel·lulosa provinent de teixits PES/CO a partir de l’ús de líquids iònics (ILs). Inicialment s’analitza l’efecte dels líquids iònics sobre la superfície del teixit, determinant els factors influents referents a l’entrada del IL a l’interior del teixit i el mecanisme químic que governa el sistema. En aquest projecte es contempla l’estudi de les variables de temps, ràtio i temperatura del sistema, amb l’objectiu de definir quina d’elles té una major influència sobre el procés. S’avalua la capacitat dels líquids iònics, en concret de l’AmimCl, per a dissoldre la cel·lulosa i posteriorment regenerar la matèria mitjançant una simulació del procés wet spinning. El medi d’inflament de la fibra, aigua o DMSO, també ha estat un altre factor estudiat, examinant així la influència de cada dissolvent i les interaccions quan entren en contacte amb el líquid iònic. Finalment, de la matèria regenerada es caracteritza la seva estructura superficial a partir del microscopi electrònic d’escombratge (SEM), la seva estructura molecular mitjançant un anàlisis d’espectroscòpia infraroja (FTIR) i la seva estabilitat tèrmica amb un anàlisi termogravimètric (TGA). El consumo de textil por habitante crece de manera exponencial, de manera que, el desarrollo de nuevos procesos sobre la gestión y los tratamientos de residuos textiles resulta una oportunidad clave para conseguir modelos integrales de economía circular que aseguren el cierre de ciclos. Actualmente, se calcula que aproximadamente un 80% de los residuos textiles generados están constituidos por fibras de algodón (CO) y poliéster (PES). La heterogeneidad en los residuos textiles es todo un reto para la industria textil, por lo que en este proyecto se estudia la recuperación de la celulosa proveniente de tejidos PES/CO a partir del uso de líquidos iónicos (ILs). Inicialmente se analiza el efecto de los líquidos iónicos sobre la superficie del tejido, determinando los factores influyentes referentes a la entrada del IL en el interior del tejido y el mecanismo químico que gobierna el sistema. En este proyecto se contempla el estudio de las variables de tiempo, ratio y temperatura del sistema, con el objetivo de definir cuál de ellas tiene una mayor influencia sobre el proceso. Se evalúa la capacidad de los líquidos iónicos, en concreto del AmimCl, para disolver la celulosa y posteriormente regenerar la materia mediante una simulación del proceso wet spinning. El medio de inflamiento de la fibra, agua o DMSO, también ha sido otro factor estudiado, examinando así la influencia de cada disolvente y las interacciones cuando entran en contacto con el líquido iónico. Finalmente, de la materia regenerada se caracteriza su estructura superficial a partir del microscopio electrónico de barrido (SEM), su estructura molecular mediante un analisis de espectroscopia infrarroja (FTIR) y su estabilidad térmica con un analisis termogravimétrico (TGA). Textile consumption per inhabitant is growing exponentially, and therefore the development of new processes related to the management and treatment of textile waste is a key opportunity to achieve comprehensive circular economy models that ensure the closure of cycles. Nowadays, it has been estimated that approximately an 80% of the textile waste generated is composed of cotton (CO) and polyester (PES) fibers. The heterogeneity in the textile waste is a huge challenge for the textile industry, and for this reason this project studies the recovery of cellulose coming from textile fabrics composed of PES/CO making use of ionic liquids (ILs). Initially, the effect of ionic liquids on the surface of the textile is analyzed, determining the influencing factors related to the entry of IL inside the textile and the chemical mechanism that controls the system. This project considers the study of the time, ratio, and temperature variables of the system, with the aim of defining which of them has a greater influence on the process. The ability of ionic liquids, specifically AmimCl, to dissolve cellulose and subsequently regenerate the material through a simulation of the wet spinning process is evaluated. The responsible for the fiber’s inflation, water or DMSO, has also been another factor of study, analyzing the influence of each solvent and the interactions when in contact with the ionic liquid. Finally, the regenerated substance is characterized by: its surface structure using the scanning electron microscope (SEM), its molecular structure by infrared spectroscopy analysis (FTIR) and its thermal stability by thermogravimetric analysis (TGA).
- Published
- 2022
45. Propuesta de placas de yeso laminado para tabiques autoportantes con material reciclado procedente de bayetas de microfibras sintéticas
- Author
-
Ruiz Etayo, Carlos and Pérez Gálvez, Filomena
- Subjects
Rayón ,Microfibras ,Waste ,Plaster ,Microfibers ,Comportamiento mecánico ,Yeso ,Mechanical behavior ,Residuos ,Polypropylene ,Poliéster ,Polipropileno ,Rayon, polyester - Abstract
El reciclaje de todo tipo de productos y materiales se ha convertido en una de las acciones más importantes en la sociedad actual. Este trabajo se centra en el reciclaje de bayetas de microfibras sintéticas para el ámbito de la arquitectura, así como la reducción de contaminación y residuos gracias a estas. Se estudiarán las capacidades físicas y mecánicas, de dicho material, en una matriz de yeso y se comprobará la respuesta de estas a distintos tipos de ensayos. Para ello se realizarán probetas con tres porcentajes de aditivos distintos (1%, 1,5% y 2% del peso) las cuales se someterán a ensayos de peso, densidad aparente, capacidad a flexión y capacidad a compresión. El análisis de los resultados obtenidos indica la viabilidad del producto sintético en rehabilitaciones, concretamente en placas de yeso laminado en tabiques autoportantes, gracias a su disminución en el peso y la densidad, con respecto a otros materiales comercializados. The recycling of all kinds of products and materials has become one of the most important actions in today's society. This work focuses on the recycling of synthetic microfiber cloths for the field of architecture, as well as the reduction of pollution and waste thanks to these. The physical and mechanical capacities of this material in a gypsum matrix will be studied and the response of these to different types of tests will be checked. To do this, specimens will be made with three percentages of different additives (1%, 1.5% and 2% of the weight) which will be subjected to tests of weight, bulk density, bending capacity and compression capacity. The analysis of the results obtained indicates the viability of the synthetic product in rehabilitations, specifically in laminated plasterboard in self-supporting partitions, thanks to its decrease in weight and density with respect to other materials marketed. Universidad de Sevilla. Grado en Fundamentos de la Arquitectura
- Published
- 2022
46. Modelling of Dyeing of Modified Polyester at Lower Temperature by Ultrasound.
- Author
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Kodric, Marija, Djordjevic, Dragan, Konstatinovic, Sandra, and Kostic, Mirjana
- Abstract
Copyright of Tekstilec is the property of University of Ljubljana, Faculty of Natural Sciences & Engineering, Department of Textiles and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
47. Life cycle assesment of waterless and conventional polyester dyeing
- Author
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Karadağ, Neslihan, Eren, Hüseyin Aksel, and Bursa Uludağ Üniversitesi/Fen Bilimleri Enstitüsü/Tekstil Mühendisliği Anabilim Dalı.
- Subjects
Classic dyeing ,Klasik boyama ,CO2 dyeing ,Life cycle analysis (LCA) ,Poliester ,Süperkritik boyama ,Susuz boyama ,Yaşam döngüsü analizi (LCA) ,Polyester ,CO2 ile boyama ,Waterless dyeing ,Supercritical dyeing - Abstract
Dünya nüfusunun kontrolsüz bir şekilde artması, bir yandan yaşam standartlarını yükseltmeye yönelik faaliyetler, diğer yandan kıt olan tatlı su kaynakları nedeniyle insanların su kullanım ihtiyaçları gün geçtikçe artmaktadır. Tekstil üretiminin her aşamasında çok fazla miktarda su tüketilmektedir. Bunlardan biri de boyama sırasında harcanan su miktarıdır. Bu sebeple su kullanımının günümüzde hızla artan bir öneme sahip olacağı ön görülmektedir. Bu çalışmada, poliester ipliğinin boyanmasında susuz, süperkritik karbondioksit (scCO2) boyama prosesi ile klasik boyama prosesi karşılaştırılmış ve sonuçlar yaşam döngüsü analizi (LCA) yöntemi ile değerlendirilmiştir. Karşılaştırmanın sonucunda susuz boyama prosesinin çevresel etkisi klasik boyamaya göre daha düşük seviyede olduğu gözlemlenmiştir. People's water usage needs are increasing day by day with the uncontrolled increase in the world population and activities aimed at raising the living standards, although the fresh water resources are scarce. A large amount of water is consumed at every stage of textile production. One of them is the amount of water consumed during dyeing. For this reason, it is foreseen that the use of water will have a rapidly increasing importance today. In this study, anhydrous supercritical carbon dioxide (scCO2) dyeing process and classical dyeing process were compared in dyeing polyester yarn and the results were evaluated by life cycle analysis (LCA) method. As a result of the comparison, it has been observed that the environmental impact of the waterless dyeing process is lower than the conventional dyeing. BUTEKOM Akbaşlar Tekstil
- Published
- 2022
48. Utjecaj starenja na svojstva poliesterskih tkanina u pranju
- Author
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Šaravanja, Ana, Firšt Rogale, Snježana, Šaravanja, Bosiljka, Pušić, Tanja, and Flinčec Grgac, Sandra
- Subjects
poliester ,mikroplastika ,otpadne vode ,starenje, proces pranja - Abstract
Sintetička vlakna čine gotovo 60 % ukupne svjetske proizvodnje vlakana, od čega najveći udio pripada poliesteru (PET). Značajno svojstvo poliesterskih vlakana u tekstilijama s aspekta njege su dobra uporabna svojstva. Međutim, u posljednje vrijeme se ističe negativan utjecaj otpuštenih mikro/nano vlakana u procesu pranja na sastav efluenata. Istraživanja u doktorskom radu usmjerit će se na utjecaj fizikalnog i kemijskog starenja poliesterskih tkanina na svojstva i stupanj opterećenja efluenata od procesa pranja.
- Published
- 2022
49. Bio-inovirani poliesterski materijal za ciljanu primjenu u bolničkom okruženju
- Author
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Čorak, Ivana, Firšt Rogale, Snježana, Šaravanja, Bosiljka, Pušić, Tanja, and Flinčec Grgac, Sandra
- Subjects
poliester ,hidroliza ,kitozan - Abstract
Istraživanja u okviru doktorskog rada obuhvatit će razvoj bio-inoviranih poliesterskih materijala za ciljanu primjenu u bolničkom okruženju u tri faze. Prva faza je aktivacija površine poliesterske tkanine hidrolizom s naglaskom na održivost procesa. Druga faza obuhvaća pripremu sub-mikron čestica kitozana u homogeni polimer te implementaciju na površinu aktivirane tkanine. U trećoj fazi ispitat će se antimikrobna učinkovitost uz postojanost obrade na proces održavanja.
- Published
- 2022
50. Comparative Study of Possible Fabrics Used as Reinforcement of the Reverse of the Mural Paintings Removed from the Vault of the Church of los Santos Juanes (Valencia)
- Author
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Esteban García, Isabel
- Subjects
Palomino de Castro y Velasco, Antonio (1655-1726) ,Tejidos ,Conservación del patrimonio cultural ,PINTURA ,Refuerzo de fibras ,Máster Universitario en Conservación y Restauración de Bienes Culturales-Màster Universitari en Conservació i Restauració de Béns Culturals ,Tejido de refuerzo ,Parroquia de los Santos Juanes (Valencia) ,Restauración de pinturas murales ,Pinturas murales ,Poliéster - Abstract
[ES] En el presente trabajo se realiza un estudio comparativo de diferentes tejidos, susceptibles de ser utilizados como refuerzo del reverso de las pinturas murales arrancadas en los años 50-60 de la bóveda de la nave central de la Iglesia de los Santos Juanes de Valencia. Para ello se han estudiado 12 tipos de tejidos sintéticos distintos, aplicados sobre el reverso de los repintes encontrados en áreas sin pintura original en dichas obras arrancadas. Con ello, se han generado 36 probetas. Las cuales han sido tratadas de igual forma que las intervenciones ejecutadas sobre la pintura original. Así pues, teniendo como finalidad el estudio de las diversas características de las telas, se han desarrollado ensayos que examinen la efectividad de cada uno de los tejidos, con el fin de determinar cuál sería el más adecuado., [EN] This study deals with the comparative analysis of different fabrics, susceptible to be used as reinforcement of the back of the mural paintings removed in the 50-60s from the vault of the central aisle of the Church of Santos Juanes in Valencia, Spain. For this purpose, 12 different types of synthetic fabrics have been studied, applied on the back of the repainting found in areas without original paint in these removed works. With this, 36 test specimens have been generated. These have been treated in the same way as the interventions executed on the original painting. Thus, with the aim of studying the different characteristics of the fabrics, tests have been developed to examine the effectiveness of each of the fabrics, in order to determine which would be the most suitable.
- Published
- 2022
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