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Superhydrophobic and Self-Sterilizing Surgical Masks Spray-Coated with Carbon Nanotubes

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Title
Superhydrophobic and Self-Sterilizing Surgical Masks Spray-Coated with Carbon Nanotubes
Author(s)
Soni, Ritesh; Joshi, Shalik Ram; Mamata Karmacharya; Min, Hyegi; Kim, Shin-Kwan; Sumit Kumar; Kim, Gun-Ho; Yoon-Kyoung Cho; Lee, Chang Young
Publication Date
2021-08-27
Journal
ACS Applied Nano Materials, v.4, no.8, pp.8491 - 8499
Publisher
American Chemical Society
Abstract
© 2021 American Chemical Society.Coronavirus has affected the entire global community owing to its transmission through respiratory droplets. This has led to the mandatory usage of surgical masks for protection against this lethal virus in many countries. However, the currently available disposable surgical masks have limitations in terms of their hydrophobicity and reusability. Here, we report a single-step spray-coating technique for the formation of a superhydrophobic layer of single-walled carbon nanotubes (SWCNTs) on a melt-blown polypropylene (PP) surgical mask. The sprayed SWCNTs form a nanospike-like architecture on the PP surface, increasing the static contact angle for water from 113.6° ± 3.0° to 156.2° ± 1.8° and showing superhydrophobicity for various body fluids such as urine, tears, blood, sweat, and saliva. The CNT-coated surgical masks also display an outstanding photothermal response with an increase in their surface temperature to more than 90 °C within 30 s of 1 sun solar illumination, confirming its self-sterilization ability. Owing to the cumulative effect of the superhydrophobicity and photothermal performance of the SWCNTs, the CNT-coated masks show 99.99% higher bactericidal performance toward Escherichia coli than pristine masks. Further, the virucidal ability of the SWCNT-coated mask, tested by using virus-like particles, was found to be almost 99% under solar illumination. As the spray-coating method is easily scalable, the nanotube-coated mask provides cost-effective personal protection against respiratory diseases.
URI
https://pr.ibs.re.kr/handle/8788114/10446
DOI
10.1021/acsanm.1c01082
ISSN
2574-0970
Appears in Collections:
Center for Soft and Living Matter(첨단연성물질 연구단) > 1. Journal Papers (저널논문)
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