218 results on '"Di Maio, Luciano"'
Search Results
202. Supramolecular Structure of Liquid-Crystalline Polyesters in Triclinic Cell
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Acierno, Domenico, primary, Concilio, Simona, additional, Di Maio, Luciano, additional, Iannelli, Pio, additional, Lotz, Bernard, additional, and Scarfato, Paola, additional
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- 2002
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203. Three-layered coextruded cast films based on conventional and metallocene poly(ethylene/α-olefin) copolymers.
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Scarfato, Paola, Di Maio, Luciano, Garofalo, Emilia, and Incarnato, Loredana
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MULTILAYERED thin films , *COPOLYMERS , *LOW density polyethylene , *METALLOCENES , *TENSILE strength , *PERMEABILITY , *ATOMIC force microscopy - Abstract
Multilayer films of a conventional linear low-density poly(ethylene/α-octene) (LLDPE) and a metallocene linear low-density poly(ethylene/α-hexene) (mLLDPE) copolymers were produced by cast co-extrusion process. Coextruded films were obtained by varying the position and the relative thicknesses of the two polymers. Mechanical (tensile and impact) tests, permeability, haze and hot tack measurements were carried out on the produced films in order to verify the effect of layer composition and position on the performances of the coextruded samples. Thermal and atomic force microscopy characterizations of the three-layer structures were also performed to correlate the resulting morphology with the film properties. The experiments demonstrated that, at fixed composition, the structures having the mLLDPE copolymer as external layers exhibit generally better mechanical performances and a widening in the sealability temperature window due to a lowering of 5℃ in the seal-initiation temperature, with only a small increase (max 3.5%) in the film haze percentages. The oxygen permeability values do not seem to be significantly affected by the structure composition and layout. [ABSTRACT FROM PUBLISHER]
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- 2014
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204. Supramolecular hexagonal structure of a segmented liquid crystalline polyester with allyl group as lateral substituent
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Acierno, Domenico, primary, Di Maio, Luciano, additional, and Iannelli, Pio, additional
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- 1999
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205. Crosslinking of a fibrous sample to a macro-oriented mesomorphic network
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Di Maio, Luciano, primary, Iannelli, Pio, additional, Pragliola, Stefania, additional, Roviello, Antonio, additional, and Sirigu, Augusto, additional
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- 1998
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206. Cellulose Nanofiber-Based Nanocomposite Films Reinforced with Zinc Oxide Nanorods and Grapefruit Seed Extract.
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Roy, Swarup, Kim, Hyun Chan, Panicker, Pooja S., Rhim, Jong-Whan, Kim, Jaehwan, Di Maio, Luciano, and Incarnato, Loredana
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ZINC oxide films ,ZINC oxide synthesis ,ACTIVE food packaging ,ZINC oxide ,NANORODS ,VAPOR barriers ,GRAPEFRUIT - Abstract
Here, we report the fabrication and characterization of cellulose nanofiber (CNF)-based nanocomposite films reinforced with zinc oxide nanorods (ZnOs) and grapefruit seed extract (GSE). The CNF is isolated via a combination of chemical and physical methods, and the ZnO is prepared using a simple precipitation method. The ZnO and GSE are used as functional nanofillers to produce a CNF/ZnO/GSE film. Physical (morphology, chemical interactions, optical, mechanical, thermal stability, etc.) and functional (antimicrobial and antioxidant activities) film properties are tested. The incorporation of ZnO and GSE does not impact the crystalline structure, mechanical properties, or thermal stability of the CNF film. Nanocomposite films are highly transparent with improved ultraviolet blocking and vapor barrier properties. Moreover, the films exhibit effective antimicrobial and antioxidant actions. CNF/ZnO/GSE nanocomposite films with better quality and superior functional properties have many possibilities for active food packaging use. [ABSTRACT FROM AUTHOR]
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- 2021
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207. Polylactide Nanocomposites As a New Solution for Eco-compatible Packaging Materials.
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Incarnato, Loredana, Di Maio, Luciano, Garofalo, Emilia, and Scarfato, Paola
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NANOCOMPOSITE materials , *PACKAGING equipment , *SILICATES , *NANOPARTICLES , *TRANSMISSION electron microscopy , *X-ray diffraction , *RHEOLOGY - Abstract
This work focuses on the possibility of improving performance properties of polylactide films for packaging applications by melt mixing silicate nanoparticles within PLA matrix. Nanocomposites at various silicate loadings were produced by cast-film extrusion using two different temperature profiles. Oxygen barrier and mechanical properties of the produced films were investigated and correlated to their nanostructure through analytical techniques sensitive to different aspect of the same morphology, such as TEM, XRD and rheological analyses. [ABSTRACT FROM AUTHOR]
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- 2010
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208. Weatherability Evaluation of Nanocomposite Polymeric Treatments for Surface Protection of Construction Materials.
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Scarfato, Paola, Letizia Fariello, Maria, Di Maio, Luciano, and Incarnato, Loredana
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NANOCOMPOSITE materials ,BUILDING materials research ,WEATHERING of buildings ,DISPERSING agents ,MONTMORILLONITE ,SILANE ,COLORIMETRY - Abstract
In this work the protective efficacy and stability against UV weathering of polymeric nanocomposites for concrete (CLS) surface protection have been evaluated. In particular, nanocomposite hybrids were prepared dispersing a commercial organomodified montmorillonite (Cloisite 30B) in two different polymeric matrices, one based on fluoroelastomers (Fluoline CP), the other on silane and siloxane (Antipluviol S). The obtained systems were characterized by several techniques (SAXD, DSC, TGA, FT-IR, contact angle measurements, colorimetry), before and after accelerated aging due to UV exposure, in order to evaluate the effect of the nanoscale dispersion of the organoclay on the properties and the UV stability of the treatments. [ABSTRACT FROM AUTHOR]
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- 2010
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209. Study on Improving the Processability and Properties of Mixed Polyolefin Post-Consumer Plastics for Piping Applications.
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Garofalo, Emilia, Di Maio, Luciano, Scarfato, Paola, Pietrosanto, Arianna, Protopapa, Antonio, and Incarnato, Loredana
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PLASTIC pipe , *PIPE fittings , *PACKAGING recycling , *FLEXURAL modulus , *FLEXIBLE packaging , *PILOT plants , *PIPE , *STEEL pipe - Abstract
This study focuses on the upgrading strategies to make Fil-s (acronym for film-small), a polyolefin-based material coming from the mechanical recycling of post-consumer flexible packaging, fit for re-use in the piping sector. The effects of washing treatments (at cold and hot conditions) and the addition of an experimental compatibilizer on the chemical-physical properties of Fil-s were first assessed. The measurements of some key properties (density, melt flow index, flexural modulus, yield strength), for both Fil-s as such and the different developed Fil-s based systems, was also conducted in order to evaluate the suitability of this complex and challenging waste stream to replace virgin PE-based pipe and fitting products, in compliance to ASTM D3350 standard. The outcomes of the present work contributed to define a code, for each Fil-s system investigated, useful for identifying the level of their performance in piping applications. All the recyclates were extruded as pipes by using a pilot scale plant, but the process resulted more stable and continuous with the compatibilized Fil-s, as it was deducible from its flow properties. Moreover, the best mechanical performances were exhibited by the hot-washed Fil-s pipes, with an increase in pipe stiffness equal to 65% respect to the unwashed sample. [ABSTRACT FROM AUTHOR]
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- 2021
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210. New Materials and Technologies for Durability and Conservation of Building Heritage
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Luigi Coppola, Tiziano Bellezze, Alberto Belli, Alessandra Bianco, Elisa Blasi, Miriam Cappello, Domenico Caputo, Mehdi Chougan, Denny Coffetti, Bartolomeo Coppola, Valeria Corinaldesi, Alberto D’Amore, Valeria Daniele, Luciano Di Maio, Luca Di Palma, Jacopo Donnini, Giuseppe Ferrara, Sara Filippi, Matteo Gastaldi, Nicola Generosi, Chiara Giosuè, Loredana Incarnato, Francesca Lamastra, Barbara Liguori, Ludovico Macera, Qaisar Maqbool, Maria Cristina Mascolo, Letterio Mavilia, Alida Mazzoli, Franco Medici, Alessandra Mobili, Giampiero Montesperelli, Giorgio Pia, Elena Redaelli, Maria Letizia Ruello, Paola Scarfato, Giuliana Taglieri, Francesca Tittarelli, Jean-Marc Tulliani, Antonino Valenza, Coppola, Luigi, Bellezze, Tiziano, Belli, Alberto, Bianco, Alessandra, Blasi, Elisa, Cappello, Miriam, Caputo, Domenico, Chougan, Mehdi, Coffetti, Denny, Coppola, Bartolomeo, Corinaldesi, Valeria, D'Amore, Alberto, Daniele, Valeria, Di Maio, Luciano, Di Palma, Luca, Donnini, Jacopo, Ferrara, Giuseppe, Filippi, Sara, Gastaldi, Matteo, Generosi, Nicola, Giosuè, Chiara, Incarnato, Loredana, Lamastra, Francesca, Liguori, Barbara, Macera, Ludovico, Maqbool, Qaisar, Cristina Mascolo, Maria, Mavilia, Letterio, Mazzoli, Alida, Medici, Franco, Mobili, Alessandra, Montesperelli, Giampiero, Pia, Giorgio, Redaelli, Elena, Letizia Ruello, Maria, Scarfato, Paola, Taglieri, Giuliana, Tittarelli, Francesca, Tulliani, Jean-Marc, and Valenza, Antonino
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durability, concrete structures, sustainability, new materials ,Settore ING-IND/22 - Scienza e Tecnologia dei Materiali ,new material ,concrete structures ,durability ,General Materials Science ,new materials ,sustainability ,Concrete structures ,concrete structure - Abstract
The increase in concrete structures’ durability is a milestone to improve the sustainability of buildings and infrastructures. In order to ensure a prolonged service life, it is necessary to detect the deterioration of materials by means of monitoring systems aimed at evaluating not only the penetration of aggressive substances into concrete but also the corrosion of carbon-steel reinforcement. Therefore, proper data collection makes it possible to plan suitable restoration works which can be carried out with traditional or innovative techniques and materials. This work focuses on building heritage and it highlights the most recent findings for the conservation and restoration of reinforced concrete structures and masonry buildings.
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- 2023
211. Multilayer Nanocomposite Polymetric Packaging For Microwave Applications.
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Galdi, Maria Rosaria, Olivieri, Rita, Liguori, Loredana, Albanese, Donatella, Di Matteo, Marisa, and Di Maio, Luciano
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X-ray diffraction , *POLYMETHINES , *HETEROCYCLIC compounds , *CRYSTALLINE electric field , *ELECTRIC properties of crystals - Abstract
Microwaveable packaging material should ensure good preservation of the product before cooking/ heating such as high barriers to gases and aromas and adequate control of water vapor transmission. Among the polymers used in flexible packaging, crystalline poly(ethylene terephthalate) (CPET) is characterized by good oxygen barrier properties and quite high heat stability which ensures the absence of alterations of foods flavors. CPET trays or films are suitable for Ready To Cook (RTC) products within a temperature range from -40 to + 220°C. The aim of this work was the production and characterization of nanocomposite multilayer PET films, for microwave applications, in which the nanoclay acts as a heating enhancer. Films prototypes were made by means of laboratory compounding equipment for the production of nanocomposite CPET and by a co-extrusion equipment for producing multilayer films using two different PET copolymer matrices and a modified nanoclay (Cloisite 20A) as heating enhancer. The study of morphology of nanocomposite layer by means of X-ray diffraction experiments was carried out in order to correlate the intercalation/exfoliation degree of nanoclay with cooking performance. [ABSTRACT FROM AUTHOR]
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- 2016
212. Informe sobre el impacto de las medidas de aislamiento social preventivo en el sector productivo del Partido de General Pueyrredon
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Graña, Fernando Manuel, Barbini, Bernarda, Zaballa, Esteban, Mauro, Lucía Mercedes, Liseras, Natacha, Calá, Carla Daniela, Graña, Fernando Manuel, Castellucci, Daniela I., Corbo, Yanina A., Cruz, Gonzalo, Roldán, Nadia G., Teyseyre, Jesica, Rech, Lautaro, Giudice, Adrián José Antonio, García, Noelia, Paladino, Máximo, Di Maio, Luciano, and Vidal, Melisa
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Partido de General Pueyrredon ,COVID-19 ,Sector Turístico ,Impacto Económico ,Sector Productivo ,Sindicatos ,Sector Industrial ,Actividad Económica ,Aislamiento Social ,Cooperativas - Abstract
El presente informe caracteriza la situación del sector productivo del Partido de General Pueyrredon (PGP) frente a las medidas de Aislamiento Social Preventivo Obligatorio. Para ello inicialmente se analiza la situación de la industria desde la perspectiva empresarial y luego del sector turístico del PGP. Estos apartados fueron realizados por el Grupo de Análisis Industrial, el Grupo de Turismo y Sociedad y la Secretaría de Vinculación con el Medio. A esto se le adiciona en tres recuadros las consideraciones de representantes de instituciones empresariales vinculadas al comercio, de cooperativas y de organizaciones sindicales y sociales. Este trabajo fue realizado por el Centro de Desarrollo Económico Territorial y el Grupo de Extensión Economía Social y Solidaria de la Facultad de Ciencias Económicas y Sociales y el Consejo Social de la Universidad Nacional de Mar del Plata., Fil: Graña, Fernando Manuel. Universidad Nacional de Mar del Plata. Facultad de Ciencias Económicas y Sociales; Argentina., Fil: Barbini, Bernarda. Universidad Nacional de Mar del Plata. Facultad de Ciencias Económicas y Sociales; Argentina., Fil: Zaballa, Esteban. Universidad Nacional de Mar del Plata. Facultad de Ciencias Económicas y Sociales; Argentina.
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- 2020
213. Use of End-of-Waste Foamed Fibers and Aggregates into a Cementitious Mortar
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Coppola, Bartolomeo, Reverchon, Ernesto, Nguyen, Frédéric, Di Maio, Luciano, Courard, Luc, Nobile, Maria Rossella, and Martinelli, Enzo
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Mortar ,Aggregates ,Fiber ,ING-IND/22 SCIENZA E TECNOLOGIA DEI MATERIALI - Abstract
2015 - 2016, Durability and sustainability of cementitious materials are two important issues in the field of construction materials. Durability is defined as the ability of cementitious materials to resist weathering action, chemical attack, abrasion or any other process of deterioration. The use of fibers is a viable solution to partially overcome the brittle behavior of such materials. At the same time it is demonstrated that fibers, by reducing cracking phenomena, allow to face the durability related issues. Different fibers have been used according to the aims of composite materials: high strength fibers are generally used for structural purposes (toughness increase) while low modulus synthetic fibers are mainly used to avoid plastic shrinkage cracking. The effectiveness of fibers reinforcing action lies mainly on the fiber/matrix interactions. Three types of interactions can be recognized: i) physical and/or chemical adhesion; ii) friction and iii) mechanical anchorage induced by deformations on the fiber surface (e.g. crimps, hooks, twisted or deformed fibers in general). Sustainability can be identified according to the definition of sustainable development stated in 1987 by Brundtland et al.: “the development that meets the needs of the present without compromising the ability of future generations to meet their own needs”. Sustainable development should take into account economic growth, social equality and environmental protection. The construction industry involves all these fields: the main concerns are raw materials consumption and CO2 emissions during cement production. Moreover, also the plastic production and disposal present several environmental issues. Once again, raw materials consumption and the speed with which these materials became waste. Thus, seen the aforementioned drawbacks related to cementitious materials, this Ph.D. was aimed to study the possibility of using end-ofwaste materials (i.e when waste ceases to be waste and becomes a secondary raw material) for the production of synthetic fibers and aggregates characterized by improved mechanical interactions with the cementitious matrix. To this extent, fibers and aggregates with a rough and porous surface, able to offer interlocking positions for the cementitious matrix, were produced in laboratory by melt extrusion-foaming process. Moreover, some chemical treatments (alkaline hydrolysis and sol-gel deposition of nanosilica) were performed on fibers, to improve chemical adhesion with the cement paste. Finally, taking into account the need for reducing the consumption of raw materials, foamed fibers and aggregates were produced starting from a polymeric end-of-waste material made of a polyolefins blend (HDPE, LDPE and PP). Alkaline hydrolysis promoted the creation of interlocking positions on fiber surface but the best behavior was recognized for fibers with nano-silica particles on the surface. In this case, a denser ITZ and a great amount of hydration products were observed by SEM investigations. Pull-out tests confirmed the better performances of treated fibers: a higher pull-out peak load was achieved and an increase of pull-out energy was evident. Subsequently, a foam extrusion process was used to manufacture polymeric fibers (both virgin and recycled) with a rough surface, to improve mechanical friction with the cementitious matrix. Optimizing foaming agent quantity and processing parameters was possible to produce fibers having adequate surface texture and diameter to be used in fiber reinforced mortars. Although fiber reinforced mortars workability decreases at increasing fiber volume fraction, the results demonstrated that this happens to a lower extent for mortars containing foamed fibers. Fibers mechanical properties decreased at increasing fibers porosity but fiber reinforced mortars mechanical properties, flexural and compressive strength, were not influenced by fibers addition nor their morphology. The rougher surface gives rise to a better fiber/matrix adhesion, as confirmed by pull-out tests. Durability investigations on the fiber reinforced mortars reported good results for capillary water absorption, sulfate attack and plastic shrinkage cracking. In particular, fibers length and volume fraction are key parameters in controlling plastic shrinkage cracking. Moreover, mortar samples containing foamed fibers displayed a better control of shrinkage cracking: cracks opening was delayed and the improved fiber/matrix bond was able to reduce crack width, compared to mortars containing smooth fibers. Finally, lightweight artificial aggregates (LWAs) were produced, starting from foamed strands. At increasing LWAs substitution, a sharp decrease of density was achieved. Also workability and mechanical properties decreased, but a more ductile behaviour was recognizable. Thermal conductivity and water vapor resistance were proportional to mortars density which obviously decreased at increasing natural sand substitutions. Moreover, the use of aggregates porosity as reservoir of internal curing water showed promising preliminary results. In brief, the results of this study demonstrate that engineered fibers with improved fiber/matrix bond allow to optimize (i.e. to reduce) fibers volume fraction in cementitious mortars. Foamed fibers characteristics can be in turn optimized by changing the manufacturing process conditions. Benefits could be not only in the control of plastic shrinkage cracking but also in the workability of fresh mortars, mechanical strength and durability of the hardened composite. In addition, using end-of-waste materials a more sustainable product can be obtained. In particular, replacing natural aggregates with plastic aggregates, is possible to reduce raw materials consumption and improve mortar properties (mainly unit weight, thermal conductivity and water vapor permeability). [edited by author], La durabilità e la sostenibilità dei materiali cementizi sono argomenti estremamente importanti nell’ambito dei materiali da costruzione. La durabilità è definita come l’abilità dei materiali cementizi a resistere nel tempo alle azioni di degrado, di attacco chimico, abrasione o qualunque altro processo di deterioramento. L’uso delle fibre consente di ovviare, seppur in modo parziale, al problema del comportamento fragile di tali materiali. È inoltre ampiamente dimostrato che le fibre, contrastando i fenomeni fessurativi, consentono di far fronte anche ai problemi legati alla durabilità. In letteratura sono state utilizzate diverse fibre, a seconda del composito da realizzarsi: fibre ad elevato modulo elastico vengono utilizzate per scopi strutturali (incremento di duttilità) mentre fibre con basso modulo sono utilizzate nel contrasto alla fessurazione. Nell’efficacia dell’azione esplicata dalle fibre gioca un ruolo fondamentale l’interazione fibra/matrice. Tre diverse tipologie di interazione sono riscontrabili: i) adesione di tipo fisica e/o chimica; ii) frizione e iii) ancoraggio meccanico dovuto alle deformazioni presenti sulla superficie delle fibre (ad esempio rilievi, uncini, scanalature ecc.). La sostenibilità può essere definita per tramite del concetto di sviluppo sostenibile, espresso nel 1987 dal rapporto Brundtland, come lo “sviluppo che incontra i bisogni della generazione presente senza compromettere la possibilità delle generazioni future di soddisfare i propri”. Lo sviluppo sostenibile deve portare in conto la crescita economica, l’uguaglianza sociale e la protezione ambientale. L’industria delle costruzioni coinvolge tutti questi settori ed i principali problemi sono legati al consumo delle materie prime e all’emissione di CO2 durante la produzione del cemento. Inoltre, anche la produzione della plastica e la sua relativa dismissione, pone alcuni problemi ambientali. Detto ciò, viste le problematiche precedentemente esposte relative sia ai materiali cementizi che plastici, le ricerche di dottorato sono state dedicate allo studio della possibilità di utilizzare materiali end-of-waste (cioè materiali che hanno cessato di essere rifiuti e sono diventati materie prime seconde) per la produzione di fibre ed aggregati sintetici, caratterizzati da una migliore interazione di tipo meccanico con la matrice cementizia. A tale scopo, le fibre e gli aggregati sono state prodotti in laboratorio attraverso un processo di melt-extrusion foaming, per ottenere una superficie scabra e porosa, capace di offrire posizioni di incastro per la matrice cementizia. Inoltre, sono stati sperimentati sulle fibre anche due trattamenti chimici (idrolisi alcalina e deposizione tramite processo sol-gel di nano-silice), in maniera tale da incrementare l’affinità chimica con la pasta cementizia. Infine, considerando anche la necessità di ridurre il consumo delle materie prime, delle fibre e degli aggregati schiumati sono stati prodotti partendo da un materiale polimerico end-of-waste costituito da una miscela di poliolefine (HDPE, LDPE e PP). L’idrolisi alcalina ha promosso la creazione di posizioni di incastro sulla superfice delle fibre ma il miglior comportamento è stato riscontrato per le fibre ricoperte di nano-silice in superficie. In questo caso è riconoscibile una più densa ITZ e sono stati osservati anche un gran numero di prodotti di idratazione tramite SEM. Le prove di pull-out hanno confermato le migliori prestazioni delle fibre trattate poiché è stato raggiunto un carico di pull-out più elevato oltre ad un incremento dell’energia di pull-out. Successivamente, un processo di foam extrusion è stato utilizzato per produrre fibre polimeriche (sia vergini che riciclate) con una superficie ruvida, per incrementare la frizione meccanica con la malta cementizia. Ottimizzando la quantità di agente schiumante ed i parametri di processo è stato possibile produrre fibre con un’adeguata tessitura superficiale e diametro, tali da poter essere utilizzate per il rinforzo di una malta cementizia. Nonostante la riduzione di lavorabilità delle malte, all’aumentare della frazione volumetrica di fibre, le prove sperimentali hanno dimostrato che l’entità di tale riduzione è minore nel caso in cui vengano utilizzate fibre schiumate. Le proprietà meccaniche delle fibre diminuiscono all’aumentare della porosità delle fibre ma le proprietà meccaniche delle malte rinforzate con tali fibre (resistenza a compressione e flessione) non risultano influenzate dalla presenza delle fibre né dalla loro morfologia. La maggiore rugosità della superficie porta ad una migliore adesione fibra/matrice, come confermato dalle prove di pull-out. Lo studio della durabilità sulle malte fibro-rinforzate ha restituito buoni risultati nei confronti dell’assorbimento d’acqua per capillarità, attacco solfatico e fessurazione da ritiro plastico. In particolare, la lunghezza e la frazione volumetrica delle fibre sono dei parametri chiave nel controllo di tale fenomeno. Inoltre, i campioni di malta contenenti le fibre schiumate hanno mostrato un maggior controllo nei confronti della fessurazione da ritiro, ritardando l’apertura delle fessure e riducendo l’ampiezza delle stesse, grazie alla migliore adesione, rispetto alle malte contenenti fibre lisce. Infine, a partire dai filamenti schiumati sono stati prodotti degli aggregati artificiali alleggeriti (LWAs). All’aumentare della sostituzione della sabbia naturale con LWAs, è stata ottenuta una marcata riduzione di densità. Inoltre, anche la lavorabilità e le proprietà meccaniche sono diminuite, ma è stato riscontrato un comportamento più duttile. La conducibilità termica e la resistenza al passaggio di vapor d’acqua diminuiscono all’aumentare della sostituzione di sabbia silicea, in maniera proporzionale alla riduzione di densità. Inoltre, l’uso della porosità degli aggregati come serbatoio d’acqua per l’internal curing ha riportato risultati promettenti. In conclusione, i risultati di questo studio hanno dimostrato che l’utilizzo di fibre ingegnerizzate con una migliore adesione all’interfaccia fibra/matrice permette di ottimizzare (cioè di ridurre) la frazione volumetrica di fibre da utilizzare nelle malte cementizie. Le caratteristiche delle fibre schiumate possono di volta in volta essere cambiate ed ottimizzate, cambiando il processo di produzione. I vantaggi ottenuti sono sia in termini di controllo della fessurazione da ritiro plastico che nella lavorabilità allo stato fresco delle malte rinforzate, ma anche proprietà meccaniche e di durabilità del composito indurito. In aggiunta, utilizzando un materiale endof-waste, può essere ottenuto un materiale più sostenibile. In particolare, sostituendo gli aggregati naturali con aggregati plastici, è possibile ridurre il consumo di materie prime e migliorare alcune proprietà della malta: in particolare densità, conducibilità termica e permeabilità al vapor d’acqua. [a cura dell'autore], XV n.s. (XXIX)
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- 2018
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214. Binders alternative to Portland cement and waste management for sustainable construction – Part 2
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Letterio Mavilia, Franco Medici, Francesco Todaro, Andrea Brenna, Luigi Coppola, Matteo Maria Gastaldi, Tiziano Bellezze, Alberto Belli, Giorgio Vilardi, Valeria Corinaldesi, Milena Marroccoli, Denny Coffetti, Domenico Caputo, Fan Yang, Giorgio Pia, Valeria Daniele, Andrea Petrella, Marco Ormellese, Ilenia Farina, Maria Cristina Mascolo, Luciano Di Maio, Alida Mazzoli, Marta Cappai, Sebastiano Candamano, Ludovica Casnedi, Ottavio Marino, Marina Cabrini, Glauco Merlonetti, Elena Redaelli, Francesco Colangelo, Francesco Delogu, Bartolomeo Coppola, Paola Scarfato, Raffaele Cioffi, Stefania Manzi, Fabio Maria Bolzoni, MariaPia Pedeferri, Loredana Incarnato, Barbara Liguori, Ombretta Cocco, Maddalena Carsana, Francesca Tittarelli, Tommaso Pastore, Giuliana Taglieri, Michele Notarnicola, Giuseppina Roviello, Paola Meloni, G Scoccia, Fortunato Crea, Sergio Lorenzi, Jacopo Donnini, Alessandra Mobili, Antonio Telesca, Elena Crotti, Sabino De Gisi, Maria Vittoria Diamanti, Maria Chiara Bignozzi, Rosa Di Mundo, Claudio Ferone, Patrizia Frontera, Federica Lollini, Chiara Giosuè, Luca Di Palma, Coppola, Luigi, Bellezze, Tiziano, Belli, Alberto, Bignozzi, Maria C, Bolzoni, Fabio, Brenna, Andrea, Cabrini, Marina, Candamano, Sebastiano, Cappai, Marta, Caputo, Domenico, Carsana, Maddalena, Casnedi, Ludovica, Cioffi, Raffaele, Cocco, Ombretta, Coffetti, Denny, Colangelo, Francesco, Coppola, Bartolomeo, Corinaldesi, Valeria, Crea, Fortunato, Crotti, Elena, Daniele, Valeria, De Gisi, Sabino, Delogu, Francesco, Diamanti, Maria V, Di Maio, Luciano, Di Mundo, Rosa, Di Palma, Luca, Donnini, Jacopo, Farina, Ilenia, Ferone, Claudio, Frontera, Patrizia, Gastaldi, Matteo, Giosuè, Chiara, Incarnato, Loredana, Liguori, Barbara, Lollini, Federica, Lorenzi, Sergio, Manzi, Stefania, Marino, Ottavio, Marroccoli, Milena, Mascolo, Maria C, Mavilia, Letterio, Mazzoli, Alida, Medici, Franco, Meloni, Paola, Merlonetti, Glauco, Mobili, Alessandra, Notarnicola, Michele, Ormellese, Marco, Pastore, Tommaso, Pedeferri, Maria Pia, Petrella, Andrea, Pia, Giorgio, Redaelli, Elena, Roviello, Giuseppina, Scarfato, Paola, Scoccia, Giancarlo, Taglieri, Giuliana, Telesca, Antonio, Tittarelli, Francesca, Todaro, Francesco, Vilardi, Giorgio, and Yang, Fan
- Subjects
Engineering ,Settore ING-IND/22 - Scienza e Tecnologia dei Materiali ,traditional binder ,0211 other engineering and technologies ,Biophysics ,Biomedical Engineering ,construction materials ,Portland-free binders ,Sustainability ,traditional binders ,waste management ,Bioengineering ,Biomaterials ,02 engineering and technology ,engineering.material ,law.invention ,law ,021105 building & construction ,Production (economics) ,Recycling ,Lime ,Waste management ,business.industry ,Green Chemistry Technology ,Oxides ,General Medicine ,construction material ,Calcium Compounds ,021001 nanoscience & nanotechnology ,Silicon Dioxide ,Natural resource ,Biomaterial ,Portland-free binder ,Cultural heritage ,Portland cement ,Sustainable construction ,Biophysic ,Sustainability, waste management, traditional binders, Portland-free binders, construction materials ,Clay ,Rubber ,Waste Management ,Construction Materials ,0210 nano-technology ,business - Abstract
The paper represents the “state of the art” on sustainability in construction materials. In Part 1 of the paper, issues related to production, microstructures, chemical nature, engineering properties, and durability of mixtures based on binders alternative to Portland cement were presented. This second part of the paper concerns the use of traditional and innovative Portland-free lime-based mortars in the conservation of cultural heritage, and the recycling and management of wastes to reduce consumption of natural resources in the production of construction materials. The latter is one of the main concerns in terms of sustainability since nowadays more than 75% of wastes are disposed of in landfills.
- Published
- 2018
215. Binders alternative to Portland cement and waste management for sustainable construction—part 1
- Author
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Marco Ormellese, Andrea Brenna, Rosa Di Mundo, Chiara Giosuè, Luca Di Palma, Bartolomeo Coppola, Luigi Coppola, Denny Coffetti, G Scoccia, Paola Scarfato, Letterio Mavilia, Giorgio Vilardi, Ottavio Marino, Tommaso Pastore, Elena Crotti, Milena Marroccoli, Franco Medici, Giuliana Taglieri, Francesca Tittarelli, Valeria Daniele, Elena Redaelli, Maria Chiara Bignozzi, Sergio Lorenzi, Tiziano Bellezze, Alida Mazzoli, Marta Cappai, Claudio Ferone, Stefania Manzi, Raffaele Cioffi, Giorgio Pia, Sebastiano Candamano, Fabio Maria Bolzoni, Ludovica Casnedi, Maria Cristina Mascolo, Maria Vittoria Diamanti, Francesco Todaro, Patrizia Frontera, MariaPia Pedeferri, Glauco Merlonetti, Ilenia Farina, Sabino De Gisi, Andrea Petrella, Matteo Maria Gastaldi, Federica Lollini, Alberto Belli, Marina Cabrini, Valeria Corinaldesi, Ombretta Cocco, Domenico Caputo, Maddalena Carsana, Fan Yang, Loredana Incarnato, Jacopo Donnini, Alessandra Mobili, Antonio Telesca, Fortunato Crea, Michele Notarnicola, Giuseppina Roviello, Paola Meloni, Luciano Di Maio, Francesco Colangelo, Francesco Delogu, Barbara Liguori, Coppola, Luigi, Bellezze, Tiziano, Belli, Alberto, Bignozzi, Maria Chiara, Bolzoni, Fabio, Brenna, Andrea, Cabrini, Marina, Candamano, Sebastiano, Cappai, Marta, Caputo, Domenico, Carsana, Maddalena, Casnedi, Ludovica, Cioffi, Raffaele, Cocco, Ombretta, Coffetti, Denny, Colangelo, Francesco, Coppola, Bartolomeo, Corinaldesi, Valeria, Crea, Fortunato, Crotti, Elena, Daniele, Valeria, De Gisi, Sabino, Delogu, Francesco, Diamanti, Maria Vittoria, Di Maio, Luciano, Di Mundo, Rosa, Di Palma, Luca, Donnini, Jacopo, Farina, Ilenia, Ferone, Claudio, Frontera, Patrizia, Gastaldi, Matteo, Giosuè, Chiara, Incarnato, Loredana, Liguori, Barbara, Lollini, Federica, Lorenzi, Sergio, Manzi, Stefania, Marino, Ottavio, Marroccoli, Milena, Mascolo, Maria Cristina, Mavilia, Letterio, Mazzoli, Alida, Medici, Franco, Meloni, Paola, Merlonetti, Glauco, Mobili, Alessandra, Notarnicola, Michele, Ormellese, Marco, Pastore, Tommaso, Pedeferri, Maria Pia, Petrella, Andrea, Pia, Giorgio, Redaelli, Elena, Roviello, Giuseppina, Scarfato, Paola, Scoccia, Giancarlo, Taglieri, Giuliana, Telesca, Antonio, Tittarelli, Francesca, Todaro, Francesco, Vilardi, Giorgio, and Yang, Fan
- Subjects
Engineering ,alternative binders ,Building materials ,concrete ,Portland cement ,sustainability ,waste management ,Alkalies ,Aluminum Compounds ,Aluminum Silicates ,Calcium Compounds ,Corrosion ,Sulfur Compounds ,Waste Management ,Construction Materials ,Green Chemistry Technology ,Biophysics ,Bioengineering ,Biomaterials ,Biomedical Engineering ,0211 other engineering and technologies ,02 engineering and technology ,law.invention ,law ,021105 building & construction ,Sulfur Compound ,Waste management ,General Medicine ,021001 nanoscience & nanotechnology ,Environmentally friendly ,Calcium Compound ,cement ,binders ,construction materials ,Building materials, concrete, Portland cement, sustainability, alternative binders, waste management ,Alkalie ,0210 nano-technology ,Settore ING-IND/22 - Scienza e Tecnologia dei Materiali ,alternative binder ,Clay ,business.industry ,Biomaterial ,Construction Material ,Sustainable construction ,Biophysic ,Aluminum Silicate ,Greenhouse gas ,Sustainability ,Building material ,Mortar ,business ,Aluminum Compound - Abstract
This review presents “a state of the art” report on sustainability in construction materials. The authors propose different solutions to make the concrete industry more environmentally friendly in order to reduce greenhouse gases emissions and consumption of non-renewable resources. Part 1—the present paper—focuses on the use of binders alternative to Portland cement, including sulfoaluminate cements, alkali-activated materials, and geopolymers. Part 2 will be dedicated to traditional Portland-free binders and waste management and recycling in mortar and concrete production.
- Published
- 2018
216. Elimination of Xylophages from Wood with Microwaves: Microstructural Trials
- Author
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Cesare, Crova, Chiadini, Francesco, Luciano Di Maio, Guerriero, Luigi, Luca, Pescione, Crova, Cesare, Chiadini, Francesco, Di Maio, Luciano, Guerriero, Luigi, and Pescione, Luca
- Published
- 2017
217. Transport properties of modified concrete by surface and bulk hydrophobization via nano-clay addition
- Author
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Fariello, Maria Letizia, Ciambelli, Paolo, Di Maio, Luciano, and Incarnato, Loredana
- Subjects
Transport properties ,Nano-clay ,Concrete ,ING-IND/22 SCIENZA E TECNOLOGIA DEI MATERIALI - Abstract
2010 - 2011 In recent decades, the concrete for years considered unchangeable and with an unlimited life, with exceptional mechanical properties which have determined principally its success, was in fact subject to phenomena of degradation which over time alter its durability. The degradation of concrete is hardly attributable to a single cause because often multiple processes can occur simultaneously, interacting in a synergistic way. Any degradation mechanism occurs, it is closely related to transport and diffusion of water in the concrete, i.e. the degree of porosity. Although the porosity of the concrete substrate is an intrinsic characteristic of the material itself, and therefore unavoidable, its control is crucial. The protective polymer-based resins are the most commonly used for concrete structures, because they are very effective to provide a physical barrier to the ingress of water, ions and gases. Despite their good efficacy in prolonging the service life of the structures, there is a need for further increase the barrier properties and their compatibility with the substrate in aggressive environmental conditions. In recent times, polymer-organoclay nanocomposites have emerged as a new class of high performance materials: in these systems nanoparticles are homogeneously dispersed in the polymer matrix in order to obtain an exfoliated structure. The high aspect ratio, which means a strong interactions between the nanofillers and the polymer, make the nanocomposites excellent organic-inorganic systems (compared to pure polymer or microcomposite systems), in terms of mechanical, thermal, optical and barrier properties. This is the reason why, it has been thought to use these systems as potentially effective protective coating for building structures, even in the most severe environmental conditions. In this thesis work different systems obtained by mixing a filler, in particular two kind of montmorillonite organically modified, with fluoro-based resins and silane-siloxane have been studied. The protective efficacy of these systems, at different charge content has been verified and the results demonstrate the potential application of polymer/organoclay nanocomposites as surface treatment materials for concrete structures. Moreover, in literature very often the use of some additives such as micro and nanoparticles is studied because it is expected that both strength and durability of a concrete could be enhanced if the overall porosity is reduced. In particular in the last years different kinds of inorganic nanoparticles, due to their physical and chemical properties, are very often integrated with cement-based building materials; in fact, thanks to their high surface area to volume ratio they can react with calcium hydroxide (Ca(OH)2) crystals, arrayed in the interfacial transition zone, and produce C–S–H gel which fills the voids to improve the density of the interfacial zone. Stable gel structures can be formed and the mechanical and the service-life properties of hardened cement paste can be improved when a smaller amount of nanoparticles is added. On the other hand, the same hydrophobic agents used as surface protective, thanks to their capability in reduction significantly the molecular attraction between the water and the concrete, could be directly added in the concrete mix in order to make the whole concrete bulk hydrophobic. Thus, in this work the research is aimed to investigate the separated and combined effect of a hydrophobic resin (silanes and siloxanes in water base) and of the nanoparticles (two montmorillonites organically modified, the Cloisite 30B and the Halloysite) on concrete durability in relation with the analysis of transport properties of cement based systems, not yet deepened in literature. [edited by author] X n.s.
- Published
- 2012
218. SUPRAMOLECULAR STRUCTURE OF LIQUID-CRYSTALLINE POLYESTERS IN TRICLINIC CELL
- Author
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Pio Iannelli, Luciano Di Maio, Paola Scarfato, Bernard Lotz, Simona Concilio, Domenico Acierno, Acierno, Domenico, P., Scarfato, Concilio, S., DI MAIO, L., Iannelli, P., Lotz, B., Concilio, Simona, DI MAIO, Luciano, Iannelli, Pio, Lotz, Bernard, and Scarfato, Paola
- Subjects
Liquid crystal polymers ,Phase transition ,Materials science ,Polymers and Plastics ,Crystal structure ,Organic Chemistry ,Supramolecular chemistry ,Triclinic crystal system ,Supramolecular assembly ,Inorganic Chemistry ,Phase (matter) ,Polymer chemistry ,Solvents ,Materials Chemistry ,Side chain ,Molecular structure ,Pendant group - Abstract
We have analyzed the phase behavior of a series of liquid-crystalline polyesters bearing the n-alkoxy pendant group. For n ) 1-4, this class of polymers shows a crystalline phase, called phase I, with a layered molecular packing and two chains per unit cell. For n > 4, a new molecular packing is observed. The new phase, called phase II, is characterized by the supramolecular assembly of 10-12 chains, each structurally independent of the others. This assembly is located in a large triclinic cell: in the case of P(5), the cell parameters are a ) 18.67 A, b ) 17.54 A, c ) 21.23 A, R) 111.1°, ‚ ) 81.7°, and A ) 105.5°, with 10 chains per unit cell (dcalcd ) 1.23 g cm-3). The molecular packing of phase II is well- described in terms of a "fracture" of the layered molecular structure of phase I. This fracture is restored when samples are dipped into chlorinate solvents. The reason the packing fracture of phase I occurs is not clear: we believe that a complex balance between "packing incompatibility" of rigid chains and flexible side groups might be responsible for this phenomenon.
- Published
- 2002
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