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Co-existing “spear-and-shield” air filter: Anchoring proteinaceous pathogen and self-sterilized nanocoating for combating viral pandemic

Authors
Daheui ChoiMOONHYUN CHOIHYEJOONGJEONGJIWOONGHEO김태현SOHYEONPARKYoungho JinSangmin LeeJINKEE HONG
Issue Date
15-Dec-2021
Publisher
ELSEVIER SCIENCE SA
Keywords
Laponite; Copper ion; SARS-CoV-2; Protein-trapping performance; Antibacterial
Citation
CHEMICAL ENGINEERING JOURNAL, v.426, pp.130763-1 - 130763-8
Journal Title
CHEMICAL ENGINEERING JOURNAL
Volume
426
Start Page
130763-1
End Page
130763-8
URI
https://yscholarhub.yonsei.ac.kr/handle/2021.sw.yonsei/5266
DOI
10.1016/j.cej.2021.130763
ISSN
1385-8947
Abstract
Infectious pollutants bioaerosols can threaten human public health. In particular, the indoor environment provides a unique exposure situation to induce infection through airborne transmission like SARS-CoV-2. To prevent the infection from spreading, personal protective equipment or indoor air purification is necessary. However, it has been discovered that the conventional filter can become contaminated by pathogen-containing aerosols, meaning that advanced filtering and self-sterilization systems are required. Here, we fabricate a multilayered nanocoating around the fabric using laponite (LAP) with Cu2+ ions (LAP-Cu2+ nanocoating) two contradictory functions in one system: trapping proteinaceous pathogens and antibacterial effect. Due to the strong LAP-protein interaction, albumin and spike protein (S-protein) are trapped into the fabric when proteins are sprayed using a nebulizer. The protein-blocking performance of the nanocoated fabric is 9.55-fold higher than bare fabric. These trapping capacities are retained after rinsing and repeated adsorption cycles, showing reproducibility for air filtration. Even though the protein-binding occurred, the LAP-Cu2+ fabric indicates antibacterial effect. LAP-Cu2+ fabric has an equivalent air and water transmittance rate to that of bare fabric with a stability under physiological environment. Therefore, given its excellent “Spear-and-shield” functions, the proposed LAP-Cu2+ fabric shows great potential for use in filter and masks during the viral pandemic.
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