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Synthesis and application of silver nanoparticles as biocidal agent in polyurethane coating / M. Bechtold in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)
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Titre : Synthesis and application of silver nanoparticles as biocidal agent in polyurethane coating Type de document : texte imprimé Auteurs : M. Bechtold, Auteur ; A. Valério, Auteur ; Antônio Augusto Ulson de Souza, Auteur ; D. de Oliveira, Auteur ; C. V. Franco, Auteur ; R. Serafim, Auteur ; S. M. A. Guelli U. Souza, Auteur Année de publication : 2020 Article en page(s) : p. 613–620 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens
Argent
Caractérisation
Essais de résilience
Nanoparticules
Polyuréthanes
Rayonnement ultraviolet B
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- AdditifsIndex. décimale : 667.9 Revêtements et enduits Résumé : Nanostructured materials have become increasingly widespread, and in recent decades, the processing industries have shown a great interest in coating materials with antibacterial properties. In this research, the biocidal effect of silver nanoparticles in the water-soluble polyurethane paint composition was evaluated. Silver nanoparticles in the aqueous phase were prepared by chemical reduction at 500 ppm using polyvinyl alcohol. The material was characterized by UV–Vis, inductively coupled plasma mass spectrometry, dynamic light scattering, zeta potential, and transmission electron microscopy. The effect of silver nanoparticles in terms of yellowing and gloss variation was evaluated by a UV-B radiation test. Silver nanoparticles had no effect on the gloss and yellowing paint film. In addition, positive results were obtained for the protection and resistance against bacteria but not satisfactory resistance against fungi. Note de contenu : - MATERIALS AND METHODS : Synthesis and characterization of silver nanoparticles (AgNPs) - Polyurethane paint preparation - UV-B radiation test - Microbial content - In-can preservation - Fungal resistance - Bacterial resistance
- RESULTS AND DISCUSSION : Synthesis and characterization of AgNPs - UV-B radiation test - Microbial contentDOI : https://doi.org/10.1007/s11998-019-00297-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00297-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34093
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 3 (05-06/2020) . - p. 613–620[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21734 - Périodique Bibliothèque principale Documentaires Disponible The colour properties of polyester/cotton knitted fabrics coated with poly(N-vinyl-2-pyrrolidone) / Giovana A. Vieira in COLORATION TECHNOLOGY, Vol. 135, N° 2 (04/2019)
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Titre : The colour properties of polyester/cotton knitted fabrics coated with poly(N-vinyl-2-pyrrolidone) Type de document : texte imprimé Auteurs : Giovana A. Vieira, Auteur ; André Cadore Pereira, Auteur ; Ana Paula Serafini Immich, Auteur ; Antônio Augusto Ulson de Souza, Auteur ; Ivonete Oliveira Barcellos, Auteur Année de publication : 2019 Article en page(s) : p. 90-96 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles).
Enduction textile
Polyesters
Polyvinylpyrrolidone
Résistance à l'éclatement
Résistance au lavage
Solidité de la couleur
Statistique
Teinture -- Fibres textiles
TricotIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The objective of this research was to investigate the use of crosslinked poly(N-vinyl-2-pyrrolidone) (PVP) to coat polyester/cotton knitted fabric, without adversely affecting its dyeing properties. Before dyeing, the knitted fabrics were tested for bursting strength to assess the influence of the coating on their resistance. The dyeing parameters were evaluated as the exhaustion (%), K/S value, colour difference (δE), relative strength (RS %) and colour fastness to washing. Bursting strengths were 9.4 for coated and 9.7 kgf cm−2 for uncoated knitted fabric samples, confirming an insignificant loss in resistance. In the evaluation of K/S, δE and RS%, the values for the samples with the highest concentration of PVP were the most different to those for the standard sample. The colour fastness showed satisfactory results indicating that neutralisation and washing after dyeing were effective. These results could lead to increased quality in the textile industry, adding value to products. Note de contenu : - EXPERIMENTAL : Coating of knitted fabric using PVP and crosslinking with ultraviolet (UV)-C radiation - Determination of bursting strength - Calculation of the gel content - Dyeing procedure - Determination of the dyeing properties - Determination of colour fastness to washing - Statistical evaluation of data
- RESULTS AND DISCUSSION : Determination of bursting strength - Determination of gel content - Determination of dyeing properties - Determination of colour fastness to washingDOI : 10.1111/cote.12375 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12375 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32321
in COLORATION TECHNOLOGY > Vol. 135, N° 2 (04/2019) . - p. 90-96[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20869 - Périodique Bibliothèque principale Documentaires Disponible