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The Enhanced Durability of AgCu Nanoparticle Coatings for Antibacterial Nonwoven Air Conditioner Filters

Fang Zhou, Jiabing Peng, Yujie Tao, Longlai Yang, De-Quan Yang and Edward Sacher

Article (2023)

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Abstract

Antibacterial nonwoven fabrics, incorporated with Ag, have been applied as masks and air conditioner filters to prevent the spread of disease from airborne respiratory pathogens. In this work, we present a comparison study of Ag ions: Ag and AgCu nanoparticles (NPs) coated onto nonwoven fabrics intended for use as air conditioner antibacterial filters. We illustrate their color changes and durability running in air conditioners using antibacterial activity testing and X-ray Photoelectron Spectroscopic (XPS) analysis. We found that AgCu NPs showed the best antibacterial efficacy and durability. XPS analysis indicated that the Ag concentration, on both the AgCu and Ag- NP-coated fibers, changed little. On the contrary, the Ag concentration on Ag ion-coated fibers decreased by ~30%, and the coated NPs aggregated over time. The color change in AgCu NP-coated fabric, from yellow to white, is caused by oxide shell formation over the NPs, with nearly 46% oxidized silver. Our results, both from antibacterial evaluation and wind blowing tests, indicate that AgCu NP-coated fibers have higher durability, while Ag ion-coated fibers have little durability in such applications. The enhanced durability of the AgCu NP-coated antibacterial fabrics can be attributed to stronger NP–fiber interactions and greater ion release.

Uncontrolled Keywords

Ag and AgCu nanoparticles; air conditioner; antibacterial filter; durability; nonwoven

Subjects: 2000 Materials science and technology > 2004 Polymers and coatings
3100 Physics > 3100 Physics
Department: Department of Engineering Physics
Research Center: RQMP - Regroupement québécois sur les matériaux de pointe
PolyPublie URL: https://publications.polymtl.ca/54365/
Journal Title: Molecules (vol. 28, no. 14)
Publisher: Multidisciplinary Digital Publishing Institute
DOI: 10.3390/molecules28145446
Official URL: https://doi.org/10.3390/molecules28145446
Date Deposited: 02 Nov 2023 14:11
Last Modified: 10 Apr 2024 09:42
Cite in APA 7: Zhou, F., Peng, J., Tao, Y., Yang, L., Yang, D.-Q., & Sacher, E. (2023). The Enhanced Durability of AgCu Nanoparticle Coatings for Antibacterial Nonwoven Air Conditioner Filters. Molecules, 28(14), 5446 (14 pages). https://doi.org/10.3390/molecules28145446

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