| Autor: |
Celine Abueva, Hyun Seok Ryu, Jun-Sang Bae, Jeongyun Kim, Andrew Padalhin, Ha Young Lee, So Young Park, Ji-Hun Mo, Phil-Sang Chung, Seung Hoon Woo |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
Materials & Design, Vol 238, Iss , Pp 112615- (2024) |
| Druh dokumentu: |
article |
| ISSN: |
0264-1275 |
| DOI: |
10.1016/j.matdes.2023.112615 |
| Popis: |
Fine dust and bioaerosols are significant public health concerns, showing the importance of protective measures. In this study, natural-based trimethyl chitosan, permanently burdened with a positive charge, was successfully distributed on the surface of melt-blown polypropylene sheets through a metal rod coating process. This surface modification was confirmed through scanning electron microscopy and X-ray photoelectron spectroscopy, indicating the surface adsorption of trimethyl chitosan without chemical bonding. Modifying polypropylene mask filters yielded a positive surface zeta potential for 10–20 g/m2 coat weight, increasing the filtration efficiency to 55–94 % in a standard particle filtration test using paraffin oil as a liquid aerosol. The filtration efficiency remained higher than conventional non-treated mask filters even after the humidification of sheets. In addition, the filtration test against fine dust particles, such as titanium dioxide, was performed with trimethyl chitosan-modified mask filters that captured up to 100–800 µg/m3 titanium oxide particle concentrations, showing better filtration than conventional mask filters in high fine dust events. Trimethyl chitosan-modified mask filters also exhibited potent inhibition, bactericidal, and antiviral effects against HCoV-OC43, reducing the virus infection rate by 93.69 %. Thus, trimethyl chitosan could be applied to several existing filter membranes to protect against particulate matter and dangerous airborne pathogens. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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Full Text from ScienceDirect