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Article

Copper-Coated Polypropylene Filter Face Mask with SARS-CoV-2 Antiviral Ability

1
Department of Nano-Bio Convergence, Korea Institute of Materials Science, 797 Changwondae-ro, Changwon 51508, Korea
2
Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
3
Department of Organic Material Science and Engineering, Pusan National University, Busan 609-755, Korea
4
Clinical Research Centre, Masan National Tuberculosis Hospital, 215 Gaporo, Masanhappo-gu, Changwon 51755, Korea
5
Building Energy Technology Center and Center for Climatic Environment Real-scale Testing, Korea Conformity Laboratories, 7 Jeongtong-ro Deoksan-myeon, Jincheon-gun, Chungcheongbuk-do 27872, Korea
6
Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Chi-wai Kan
Polymers 2021, 13(9), 1367; https://doi.org/10.3390/polym13091367
Received: 29 March 2021 / Revised: 16 April 2021 / Accepted: 19 April 2021 / Published: 22 April 2021
(This article belongs to the Collection Polymeric Materials for COVID-19 Prevention and Treatment)
Face masks will be used to prevent pandemic recurrence and outbreaks of mutant SARS-CoV-2 strains until mass immunity is confirmed. The polypropylene (PP) filter is a representative disposable mask material that traps virus-containing bioaerosols, preventing secondary transmission. In this study, a copper thin film (20 nm) was deposited via vacuum coating on a spunbond PP filter surrounding a KF94 face mask to provide additional protection and lower the risk of secondary transmission. Film adhesion was improved using oxygen ion beam pretreatment, resulting in cuprous oxide formation on the PP fiber without structural deformation. The copper-coated mask exhibited filtration efficiencies of 95.1 ± 1.32% and 91.6 ± 0.83% for NaCl and paraffin oil particles, respectively. SARS-CoV-2 inactivation was evaluated by transferring virus-containing media onto the copper-coated PP filters and subsequently adding Vero cells. Infection was verified using real-time polymerase chain reaction and immunochemical staining. Vero cells added after contact with the copper-coated mask did not express the RNA-dependent RNA polymerase and envelope genes of SARS-CoV-2. The SARS-CoV-2 nucleocapsid immunofluorescence results indicated a reduction in the amount of virus of more than 75%. Therefore, copper-coated antiviral PP filters could be key materials in personal protective equipment, as well as in air-conditioning systems. View Full-Text
Keywords: SARS-CoV-2; antiviral activity; copper film SARS-CoV-2; antiviral activity; copper film
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MDPI and ACS Style

Jung, S.; Yang, J.-Y.; Byeon, E.-Y.; Kim, D.-G.; Lee, D.-G.; Ryoo, S.; Lee, S.; Shin, C.-W.; Jang, H.W.; Kim, H.J.; Lee, S. Copper-Coated Polypropylene Filter Face Mask with SARS-CoV-2 Antiviral Ability. Polymers 2021, 13, 1367. https://doi.org/10.3390/polym13091367

AMA Style

Jung S, Yang J-Y, Byeon E-Y, Kim D-G, Lee D-G, Ryoo S, Lee S, Shin C-W, Jang HW, Kim HJ, Lee S. Copper-Coated Polypropylene Filter Face Mask with SARS-CoV-2 Antiviral Ability. Polymers. 2021; 13(9):1367. https://doi.org/10.3390/polym13091367

Chicago/Turabian Style

Jung, Sunghoon, Jun-Yeoung Yang, Eun-Yeon Byeon, Do-Geun Kim, Da-Gyum Lee, Sungweon Ryoo, Sanggu Lee, Cheol-Woong Shin, Ho Won Jang, Hyo Jung Kim, and Seunghun Lee. 2021. "Copper-Coated Polypropylene Filter Face Mask with SARS-CoV-2 Antiviral Ability" Polymers 13, no. 9: 1367. https://doi.org/10.3390/polym13091367

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