29 documents found, page 1 of 3
Size effects on antimicrobial efficiency of DBD plasma coated silver nanopartic...
Zille, Andrea; Fernandes, Margarida Maria Macedo; Francesko, Antonio; Tzanov, Tzanko Kaloyanov; Fernandes, Marta Susana MachadoThis work studies the surface characteristics, the antimicrobial activity and the aging effect, of plasma pre-treated polyamide 6,6 fabrics (PA66) coated with silver nanoparticles (AgNPs), with the aim to identify the optimum size of nanosilver exhibiting antibacterial properties suitable for manufacturing of hospital textiles. The release of bactericidal Ag+ ions from the 10, 20, 40, 60 and 100 nm AgNPs-coated...
Glycerol/PEDOT:PSS coated woven fabric as flexible heating element on textiles
Moraes, Maria R.; Alves, Alexandra Manuela Vieira Cruz Pinto; Toptan, Fatih; Martins, Marcos Silva; Vieira, E. M. F.; Paleo, A. J.; Souto, A. PedroA polyamide 6,6 (PA66) fabric pre-treated with a double barrier dielectric (DBD) atmospheric plasma in air was coated with 1 and 5 layers of an intrinsically conducting glycerol-doped PEDOT:PSS polymer (PEDOT:PSS + GLY) with the final objective of developing a cost-competitive and temperature controllable flexible-heating element to be used in clothing encapsulated between an outer and an inner separator layer ...
Size and aging effects on antimicrobial efficiency of silver nanoparticles coat...
Zille, Andrea; Fernandes, Margarida Maria Macedo; Francesko, Antonio; Tzanov, Tzanko Kaloyanov; Fernandes, Marta Susana MachadoRecently, renewed interest has arisen in silver nanopar@cles for biomedical devices because of their high surface energy, enhanced physicochemical and biological proper@es and extremely large surface area, which provides beAer contact with microorganisms. Atmospheric plasma is an alterna@ve and cost- compe@@ve method to wet chemical nanopar@cles deposi@on methods, avoiding the need of toxic solvents, expensive ...
Plasma treatment of polyester fabrics to increase the adhesion of reduced graph...
Molina, J.; Fernandez, J.; Fernandes, M.; Souto, A. Pedro; Esteves, M. de Fátima; Bonastre, J.; Cases, F.Polyester (PES) fabrics were treated with plasma to enhance the adhesion of reduced graphene oxide (RGO) and produce conductive fabrics. The surface energy of the plasma treated fabrics was measured using contact angle measurements and showed a stabilization of this parameter with plasma dosages of 3000 W min m(-2). The surface roughness measured by atomic force microscopy (AFM) also showed a stabilization with...
Size and aging effects on antimicrobial efficiency of silver nanoparticles coat...
Zille, Andrea; Fernandes, Margarida M.; Francesko, Antonio; Tzanov, Tzanko; Fernandes, Marta; Oliveira, Fernando; Almeida, Luís deThis work studies the surface characteristics, antimicrobial activity, and aging effect of plasma-pretreated polyamide 6,6 (PA66) fabrics coated with silver nanoparticles (AgNPs), aiming to identify the optimum size of nanosilver exhibiting antibacterial properties suitable for the manufacture of hospital textiles. The release of bactericidal Ag+ ions from a 10, 20, 40, 60, and 100 nm AgNPs-coated PA66 surface ...
Application of nanotechnology in antimicrobial finishing of biomedical textiles
Zille, Andrea; Almeida, Luís de; Amorim, M. T. Pessoa de; Carneiro, Noémia; Esteves, M. de Fátima; Silva, Carla J. S. M.; Souto, A. PedroIn recent years, the antimicrobial nanofinishing of biomedical textiles has become a very active, high-growth research field, assuming great importance among all available material surface modifications in the textile industry. This review offers the opportunity to update and critically discuss the latest advances and applications in this field. The survey suggests an emerging new paradigm in the production and...
Novel copolymer for SiO2 nanoparticles dispersion
Gowri, S.; Almeida, Luís de; Amorim, M. T. Pessoa de; Carneiro, Noémia; Souto, A. Pedro; Esteves, M. de FátimaHigh performance polymers exhibiting multifunctional characteristics can be achieved by the introduction of inorganic nanoparticles like SiO2 into the functional polymers. In the present work a copolymer epoxy poly(dimethylacrylamide) was synthesized to disperse the SiO2 nanoparticles. The aim of the work is to develop a new method/process/material for the dispersion of nanoparticles and evaluating the performa...
Polyaniline coated conducting fabrics : chemical and electrochemical characteri...
Esteves, M. de Fátima; Molina, J.; Fernandéz, J.; Bonastre, J.; Cases, F.Polyaniline coated conducting fabrics have been obtained by chemical oxidation of aniline by potassium peroxydisulfate on polyester fabrics. Two different acids have been employed to carry out the synthesis (HCl and H2SO4), obtaining the best results of conductivity with the latter one. The conducting fabrics have been characterized chemically by means of Fourier transform infrared spectroscopy with attenuated ...
Functional finishing of polyamide fabrics using ZnO-PMMA nanocomposites
Gowri, S.; Almeida, Luís de; Amorim, M. T. Pessoa de; Carneiro, Noémia; Souto, A. Pedro; Esteves, M. de Fátima; Kumar, S.Polymer nanocomposites offer possibility of developing a new class of nanofinishing materials for textiles with their own manifold of structure property relationship. Approaches to modify the polymer nanocomposites by various inorganic substances can lead to a huge number of additional functionalities which are increasingly demanded by the textile industries. In the present work, zinc oxide nanoparticles were p...
Polymer nanocomposites for multifunctional finishing of textiles: a review
Gowri, S.; Almeida, Luís de; Amorim, M. T. Pessoa de; Carneiro, Noémia; Souto, A. Pedro; Esteves, M. de FátimaImprovement of existing properties and the creation of new material properties are the most important reasons for the functionalization of textiles. Polymer nanocomposites offer the possibility of developing a new class of nanofinishing materials for textiles with their own manifold of structure property relationship only indirectly related to their components and their micron and macro-scale composite counterp...