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Open AccessFeature PaperArticle

Antimicrobial Efficacy of Low Concentration PVP-Silver Nanoparticles Deposited on DBD Plasma-Treated Polyamide 6,6 Fabric

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2C2T-Centro de Ciência e Tecnologia Têxtil, Universidade do Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
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Department of Textile Engineering, Federal University of Rio Grande do Norte, Natal/RN 1524, Brazil
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Jožef Stefan Institute, 1000 Ljubljana, Slovenia
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National Institute for Lasers, Plasma and Radiation Physics, 077125 Măgurele, Romania
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Department of Applied Physics, Ghent University, 9000 Ghent, Belgium
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Centexbel Ghent, Technologie park 7, 9052 Ghent, Belgium
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(9), 581; https://doi.org/10.3390/coatings9090581
Received: 1 August 2019 / Revised: 3 September 2019 / Accepted: 12 September 2019 / Published: 14 September 2019
(This article belongs to the Special Issue Functional Coatings for Textile Applications)
In this study, a low concentration (10 μg·mL−1) of poly(N-vinylpyrrolidone) (PVP)-coated silver nanoparticles (AgNPs) were deposited by spray and exhaustion (30, 70 and 100 °C) methods onto untreated and dielectric barrier discharge (DBD) plasma-treated polyamide 6,6 (PA66) fabric. DBD plasma-treated samples showed higher AgNP deposition than untreated ones for all methods. After five washing cycles, only DBD plasma-treated samples displayed AgNPs on the fabric surface. The best-performing method was exhaustion at 30 °C, which exhibited less agglomeration and the best antibacterial efficacy against S. aureus (4 log reduction). For E. coli, the antimicrobial effect showed good results in all the exhaustion samples (5 log reduction). Considering the spray method, only the DBD plasma-treated samples showed some bacteriostatic activity for both strains, but the AgNP concentration was not enough to have a bactericidal effect. Our results suggest DBD plasma may be a low cost and chemical-free method for the preparation of antibacterial textiles, allowing for the immobilization of a very low—but effective—concentration of AgNPs. View Full-Text
Keywords: silver nanoparticles; dielectric barrier discharge; plasma; antimicrobial; exhaustion; spray silver nanoparticles; dielectric barrier discharge; plasma; antimicrobial; exhaustion; spray
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Ribeiro, A.I.; Senturk, D.; Silva, K.K.; Modic, M.; Cvelbar, U.; Dinescu, G.; Mitu, B.; Nikiforov, A.; Leys, C.; Kuchakova, I.; De Vrieze, M.; Souto, A.P.; Zille, A. Antimicrobial Efficacy of Low Concentration PVP-Silver Nanoparticles Deposited on DBD Plasma-Treated Polyamide 6,6 Fabric. Coatings 2019, 9, 581.

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