期刊
JOURNAL OF INDUSTRIAL TEXTILES
卷 52, 期 -, 页码 -出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/15280837221119411
关键词
electret filter; storage; repeated use; filtration; structure; charge; effective lifetime
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2022R1A2C2003072]
- Korea Institute for Advancement of Technology (KIAT) - Korea Government (MOTIE) [P0012770]
- National Research Foundation of Korea [2022R1A2C2003072] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study investigates the effect of storage temperature and humidity on the structural characteristics and charges of an electret filter, associating with the filtration performance. It found that humid storage conditions significantly deteriorated the filtration efficiency, and high temperature caused a lowered electrostatic filtration efficiency. The study provides scientific reference for the desirable storage condition and replacement cycle of filtering masks.
Worldwide attention has been paid to effective protection strategies against the COVID-19 pandemic. Filtering masks are generally kept for a certain period of shelf-life before being used, and frequently, they are used repeatedly with recurrent storages. This study investigates the effect of storage temperature and humidity on the structural characteristics and charges of an electret filter, associating with the filtration performance in terms of efficiency and pressure drop based on a practical use-storage scenario. For the repeated use conditions with recurrent storage, humid storage conditions significantly deteriorated the filtration efficiency as hygroscopic particles quickly wetted the surface and masked the surface charges. The high temperature rapidly deteriorated the filter charges and caused a lowered electrostatic filtration efficiency. In a heated condition, the web became fluffier, yet it did not directly affect the pressure drop or mechanical filtration efficiency. The approach of this study is progressive in that rigorous analysis was performed on examining the particle morphology and internal structure of filter media with varied storage conditions to link with the filtration performance and the effective lifetime. This study intends to provide a scientific reference guiding a desirable storage condition and replacement cycle of filtering masks considering the actual use habits and storage environment.
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