Encontrados 15 documentos, a visualizar página 1 de 2
Functionalization of cork agglomerate composite with pcm microcapsules after db...
Carmo, S. N.; Oliveira, F. R.; Silva, E. A. A.; Steffens, F.; Souto, A. PedroThis research intends to study the influence of dielectric barrier discharge (DBD) plasma treatment on the adsorption of Phase Change Materials (PCM) microcapsules applied to cork agglomerate laminated with a polymer membrane. Several experimental techniques were used to evaluate cork and membrane surface modification after plasma treatment and the influence on the microcapsules adsorption, namely, Static and D...
Characterization of natural cork agglomerate functionalised by plasma treatment
Silva, E. A. A.; Oliveira, F. R.; Carmo, S. N.; Steffens, F.; Souto, A. PedroThis work intends to study the chemical and physical modifications of natural cork agglomerate after plasma treatment using dielectric barrier discharge (DBD). Different experimental techniques were used to evaluate the surface alterations of the substrate pre- treated with DBD plasma, namely, static and dynamic contact angle, surface energy, Fourier transform infrared spectroscopy (FTIR), energy dispersive spe...
Cortiça, tecnologia e moda : aplicação da descarga plasmática para viabilizar a...
Etienne, E. A. A.; Oliveira, F. R.; Carmo, S. N.; Steffens, F.; Souto, A. PedroEste trabalho pretende estudar potenciais aplicações da cortiça. Por ser tratar de um material inerte, muitas vezes torna-se necessário modificar a superfície deste substrato com o intuito de melhorar a sua interação com outros tipos de materiais nos processos de estamparia, tingimento, acabamentos entre outros. Diferentes técnicas foram utilizadas para analisar a cortiça após o tratamento plasmático. Verificou...
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...
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...
Effect of carbohydrate availability on time to exhaustion in exercise performed...
Lima-Silva,A.E.; De-Oliveira,F.R.; Nakamura,F.Y.; Gevaerd,M.S.This study examined the effects of pre-exercise carbohydrate availability on the time to exhaustion for moderate and heavy exercise. Seven men participated in a randomized order in two diet and exercise regimens each lasting 3 days with a 1-week interval for washout. The tests were performed at 50% of the difference between the first (LT1) and second (LT2) lactate breakpoint for moderate exercise (below LT2) an...
Tingimento da poliamida 6.6 com corantes ácidos, reactivos e directos após modi...
Oliveira, F. R.Dissertação de mestrado em Química Têxtil ; O tingimento de fibras de poliamida é muito comum com corantes ácidos; entretanto o uso de outras classes de corantes, como reactivos e directos, podem oferecer grandes oportunidades para o desenvolvimento de novos produtos com melhores propriedades como esgotamento, fixação, níveis de solidez, brilho, uma maior gama de cores, podendo inclusivamente gerar soluções en...
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...
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