Encontrados 23 documentos, a visualizar página 1 de 3
Functionalization of wool fabric with phase-change materials microcapsules afte...
Oliveira, Fernando; Fernandes, Marta; Carneiro, Noémia; Souto, A. PedroThe use of microcapsules has increased in several different areas, namely, textile applications. They have been used as a possible means of introducing new properties, namely, in medical care by antibiotics, skin moisturizers, and other drugs and for thermal comfort. In this study, we examined the influence of dielectric barrier discharge (DBD) plasma treatment on the adhesion of phase-change material (PCM) mic...
Effect of particle size on silver nanoparticle deposition onto dielectric barri...
Vu, Nguyen Khanh; Zille, Andrea; Oliveira, F. R.; Carneiro, Noémia; Souto, A. PedroThe effect on the deposition of three different size silver nanoparticles (AgNPs) onto a polyamide 6,6 (PA) fabric pre-treated using air dielectric barrier discharge (DBD) plasma was investigated. The SEM, EDS, and XPS analysis confirm that the smaller is the diameter of AgNPs, the higher the amount of adsorbed NPs on the PA. The DBD treatment on PA induces a threefold increase in Ag adsorption. The result conf...
Acabamento de têxteis multifuncionais com nanocompósitos poliméricos
Ventura, Sandra; Carneiro, Noémia; Souto, A. PedroA funcionalização dos materiais têxteis pretende melhorar as propriedades existentes e criar novas potencialidades para novos campos de aplicação dos produtos. Uma nova classe de acabamentos funcionais duráveis pode ser obtida tendo como base os nanocompósitos poliméricos. Podem obter-se e maximizar-se funcionalidades como fácil limpeza, protecção UV, antibacteriana, resistência à chama, condução eléctrica, etc...
Influence of DBD plasma modification in the dyeing process of polyamide
Souto, A. Pedro; Oliveira, F. R.; Fernandes, M.; Carneiro, NoémiaIn this work, a study of the dyeing of polyamide fabrics after surface modification by dielectric barrier discharge (DBD) plasma treatment was performed. Physical and chemical properties of the textile substrate were characterized before and after plasmatic modification, showing important changes in water contact angle, hydrophility, chemical surface composition and morphology. Dyeing properties with direct dye...
DBD treatment of diacetate, polyamide, polyester, acrylic and wool fibres and c...
Souto, A. Pedro; Carneiro, Noémia; Oliveira, F. R.; Nakagawa, A. P.; Ventura, SandraIn this work we present a study of a DBD plasma treatment of five different fibres (diacetate, polyamide, polyester, acrylic and wool), using a dielectric barrier discharge running with different dosages in air at atmospheric pressure. Based on the results above, the dosage around 600 W.min/m2 has been found to produce uniform wettability in tested materials. The experiments were conducted to determine the eff...
UV protection of polyamide fabrics with polymeric nanocomposites
Carneiro, Noémia; Souto, A. Pedro; Gowri, S.; Ventura, SandraSun protective textiles are highly important regarding health problems, not only for children, but also for people who spend a lot of time outdoors in their line of work. The present study shows results for UV protection with thin and thick polyamide textile fabrics treated with different polymeric nanocomposites. Tests with different concentrations of ZnO, Al2O3, SiO2 and TiO2 nanoparticles, dispersed in PMMA,...
Durable functionalities in polyamide 6.6 with ZnO-PMMA nanocomposites
Carneiro, Noémia; Souto, A. Pedro; Gowri, S.; Ventura, SandraHydrophobicity and hydrophility functionalities imparted in polyamide 6.6 fabrics were tested aiming their permanency facing conditions of wearable common use as domestic washing. High improvement in functional behavior is obtained for well dispersed ZnO nanoparticles in a polymeric matrix applied in polyamide 6.6 fabrics. UV protection has been assigned as very effective for the PA fabric finished with ZnO-PMM...
Tingimento da poliamida 6.6 com corantes reactivos para lã e algodão após modif...
Oliveira, F. R.; Souto, A. Pedro; Carneiro, NoémiaO tingimento de fibras de poliamida é muito comum com corantes ácidos; entretanto o uso de corantes reativos pode oferecer grandes oportunidades para o desenvolvimento de novos produtos com melhores propriedades como brilho, níveis de solidez,esgotamento, uma maior gama de cores, dentre outras. Tecidos de poliamida 6.6 foram tratados com diferentes dosagens de descarga plasmática obtidas em condições atmosféri...
Surface modification on polyamide 6.6 with double barrier discharge (DBD) plasm...
Oliveira, F. R.; Carneiro, Noémia; Souto, A. Pedro; Nascimento, J. H. O.Dyeing of polyamide fibers is normally made with acid dyes, however, it is somewhat difficult to achieve uniformity and control of pH and temperature must be carefully made. The possibility to dye polyamide 6.6 in a larger gamut of colours with good properties may be achieved using other classes of dyes after plasmatic modifications in textile substrates. Polyamide 6.6 fabrics were treated with Double Barrier D...
Tingimento da poliamida 6.6 com corantes reactivos para lã e algodão após modif...
Oliveira, F. R.; Souto, A. Pedro; Carneiro, NoémiaO tingimento de fibras de poliamida é muito comum com corantes ácidos; entretanto o uso de corantes reativos pode oferecer grandes oportunidades para o desenvolvimento de novos produtos com melhores propriedades como brilho, níveis de solidez,esgotamento, uma maior gama de cores, dentre outras. Tecidos de poliamida 6.6 foram tratados com diferentes dosagens de descarga plasmática obtidas em condições atmosféric...
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