7 results on '"Demir, Aslı"'
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2. A new application method of chitosan for improved antimicrobial activity on wool fabrics pretreated by different ways
- Author
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Demir, Aslı, Arık, Buket, Ozdogan, Esen, and Seventekin, Necdet
- Published
- 2010
- Full Text
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3. ANALYSIS OF BIOPOLYMER APPLICATION ON COTTON FABRICS BY DIFFERENT METHODS.
- Author
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TÜREMEN, Merve and DEMİR, Aslı
- Abstract
Copyright of Journal of Textile & Apparel / Tekstil ve Konfeksiyon is the property of Tekstil ve Konfeksiyon 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
- 2017
4. A GREEN APPLICATION OF NANO SIZED CHITOSAN IN TEXTILE FINISHING.
- Author
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ŞAHAN, Görkem and DEMİR, Aslı
- Abstract
Copyright of Journal of Textile & Apparel / Tekstil ve Konfeksiyon is the property of Tekstil ve Konfeksiyon 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
- 2016
5. The synthesis and application of chitosan coated ZnO nanorods for multifunctional cotton fabrics.
- Author
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Türemen, Merve, Demir, Aslı, and Gokce, Yavuz
- Subjects
- *
COTTON textiles , *NANORODS , *CHITOSAN , *ZINC oxide , *COATED textiles , *METAL nanoparticles , *NATURAL dyes & dyeing - Abstract
It is of great interest in the interaction of fabrics with various biopolymers to improve their properties. Chitosan (CHT) is a promising biopolymer due to its abundance and challenging functions for many industries including textiles. CHT can be modified by metal and metal oxide nanoparticles to obtain new functional materials. In this study, binary chitosan-zinc oxide (CHT-ZnO) nanocomposite was successfully prepared by precipitation method. The cotton fabrics were treated by obtained bionanocomposites (BNC) using pad-dry-cure and sol-gel methods to increase their washing durability against multiple cycles. Moreover, (3-Glycidyloxypropyl) trimethoxysilane (GPTMS) was used to improve washing durability of BNC. BNC coated fabrics were tested for the antibacterial and UV protection performances. A ternary chitosan-zinc oxide-titanium dioxide (CHT-ZnO-TiO 2) nanocomposite was also synthesized to observe the changes in UV properties for the first time. The results revealed that CHT-ZnO binary complex provided very good antibacterial and UV protective properties. The results also proved that sol-gel application by GPTMS enhanced these effects against multi washing cycles of BNC treated cotton fabrics in comparison to CHT treated fabrics. The application of the ternary system changed the UV protection factor (UPF) rating of fabrics from the "very good protection" category to the "excellent protection" category. [Display omitted] • CHT-ZnO nanorods were synthesized by chemical precipitation method. • Binary CHT-ZnO and ternary CHT-ZnO-TiO 2 BNC samples were applied to cotton fabrics. • Multifunctional fabrics were successfully prepared. • GPTMS utilization increased the durability of antibacterial efficiency and UPF. • BNC treated fabrics showed better antibacterial and UPF than untreated fabrics. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
6. Tekstil terbiye işlemlerinde nanokitosan kullanımı
- Author
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Türemen, Merve, Demir, Aslı, Tekstil Mühendisliği Anabilim Dalı, and Fen Bilimleri Enstitüsü
- Subjects
Sol-Gel ,Chitosan ,Biopolymer ,Tekstil ve Tekstil Mühendisliği ,Sol-Jel ,Textile and Textile Engineering ,Atmosferik Plazma ,Wool ,Yün ,Pamuk ,Cotton ,Nanokitosan ,Nanochitosan ,Biyopolimer ,Atmospheric Plasma ,Kitosan - Abstract
Birçok sektörde olduğu gibi tekstil endüstrisinde de giderek artan çevre kirliliği, endüstriyel atıkların toksikolojik etkileri ve doğal kaynakların giderek tükenmesinin yansımaları sonucu, çevre dostu üretim yöntemleri ve yenilenebilir kaynaklardan elde edilen polimerlerin kullanımı ön plana çıkmıştır. Canlılara karşı toksik olmayan, biyobozunur ve biyouyumluluğa sahip olan kitosan tekstil endüstrisinde geniş kullanım alanı bulmuştur. Nanoteknolojinin hayatımıza girmesiyle birlikte kitosandan daha etkin bir şekilde yararlanmak için boyutu küçültülerek daha az miktarda kullanarak daha etkili sonuçlar veren nanokitosan elde edilmiştir. Kitosanın boyutunu küçültmek için birçok yöntem kullanılmasına rağmen iyonik jelleşme yöntemi kolay olması ve toksik kimyasal madde kullanımı gerektirmemesi nedeniyle en çok kullanılan yöntemdir. Bu tez çalışmasında; farklı formlardaki kitosan (nanokitosan ve kitosan-metal nanokompozit) ile normal (makro) boyuttaki kitosanı klasik terbiye işlemlerine alternatif çevreci yöntemler olan atmosferik plazma ve sol jel yöntemleriyle pamuklu ve yünlü kumaşlara uygulanmıştır. İşlem görmüş kumaşlar fiziksel ve kimyasal açıdan (FTIR, SEM, XPS, mukavemet, sürtünme katsayısı, hava geçirgenliği, haslık ve boyanma özellikleri vb.) değerlendirilerek karşılaştırılmıştır., Because of constantly increasing environmental pollution, toxicological effects of industrial waste and the reflection of decreasing natural resources, environmental friendly manufacturing methods and usage of biopolymers obtained from sustainable resources became an important issue in textile industry. Chitosan has several application areas in textile industry because of its biodegradability, biocompatibility and nontoxicological effects on living organisms. With the introduction of nanotechnology into our lives, nanochitosan particles were obtained in order to take the advantage of macro-sized chitosan more effectively. Therefore, more effective results were achieved by using less amount of chitosan. Although there are several methods to reduce the size of chitosan, ionic gelation is most the commonly used method because it is an easy method and it does not require the use of toxic chemicals In this study; to make the applicaton of different forms of chitosan (nanochitosan and chitosan-metal nanocomposites) and normal (macro) sized chitosan onto the cotton and wool fabrics by environmental friendly methods such as plasma and sol gel as an alternative to conventional finishing methods. The treated fabrics are compared to physically and chemically (FTIR, SEM, XPS, strength, friction coefficient, air permeability, colour fastness and dyeing properties, etc.).
- Published
- 2017
7. A research about the utilization of chitosan biopolymer in various forms with wool fibres
- Author
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Şahan, Görkem, Demir, Aslı, Tekstil Mühendisliği Anabilim Dalı, and Ege Üniversitesi, Fen Bilimleri Enstitüsü
- Subjects
Plasma ,Chitosan ,Tekstil ve Tekstil Mühendisliği ,Tekstil Mühendisliği A.B.D ,Textile and Textile Engineering ,Nanokitosan, kitosan, yün, plazma, enzim ,Wool ,Nanochitosan, chitosan, wool, plasma, enzyme - Abstract
Kitosan dünyada en çok bulunan ikinci biyopolimer olan kitinin en önemli türevidir. Bu yenilenebilir kaynaktan daha etkili bir şekilde yararlanmak için kitosanın boyutlarını küçültme çalışmaları son yıllarda hız kazanmaya başlamıştır. Kitosanın boyutunu küçültmek için birçok yöntem kullanılmasına rağmen iyonik jelleşme yöntemi kolay olması ve toksik kimyasal madde kullanımı gerektirmemesi nedeniyle en çok kullanılan yöntemdir.Çevre bilinci ve tüketici farkındalığı, günümüzde tekstil terbiyesinde uygulanan geleneksel kimyasal işlemler yerine çevre dostu yeni teknolojilerin kullanımını gündeme getirmiştir. Ekolojik yöntemler olarak atmosferik plazma ve enzimatik işlem tekstil terbiyesinde çok önemli bir yere sahiptir.Bu tez çalışmasında; ham, enzim ve/veya plazma ile işlem görmüş yünlü kumaşların boyama, haslık, çekmezlik ve mukavemet gibi özellikleri üzerinde kitosan ve nanokitosanın etkisi karşılaştırmalı olarak araştırılmıştır. Antimikrobiyal aktivite deneylerinde gümüş yüklü nanokitosan partikülleri de kullanılmıştır. Kitosan, nanokitosan ve gümüş yüklü nanokitosan ile işlem gören yün liflerinin antimikrobiyal aktivitesi incelenmiştir. Chitosan is the most important derivative of chitin which is the second most abundant biopolymer in the world. To take advantage of this renewable resource more effectively, size reduction efforts has begun to gain momentum in recent years. Although there are several methods to reduce the size of chitosan, ionic gelation is most the commonly used method because it is an easy method and it does not require the use of toxic chemicals. Environmental concerns and consumer awareness has brought prominence to eco-friendly new technologies as an alternative to the traditional chemical processes in textile finishing today. As two of the ecological methods, the atmospheric plasma method and enzymatic method have a very significant place among the rest of the textile finishing processes.In this study, the use of chitosan and nanochitosan are investigated on untreated, enzyme or/and plasma treated wool fabrics. The effects of chitosan and nanochitosan are compared in regards to their performances such as dyeing, fastness, anti-shrinkage properties and strenght. For the antimicrobial property activity test, silver loaded nanochitosan particles are also used. Chitosan, nanochitosan and silver loaded nanochitosan treated wool fabrics of antimicrobial activity are invesigated. 145
- Published
- 2014
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