123rd General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Exhibition Hall 2
Time 4월 19일 (금요일) 11:00~12:30
Code MAT.P-426
Subject Reusable Polybenzimidazole Nanofiber Air Filter for PM2.5 Dust Proof Mask
Authors Ara Cho, Min Hyung Lee1,*
Chemistry, Kyung Hee University, Korea
1Department of Applied Chemistry, Kyung Hee University, Korea
Abstract Recently, ultrafine particulate matters (PMs) are serious causes of air pollution. The size of ultrafine PMs is similar or even smaller than that of human tissues, thus PMs are easy to accumulate in the body and may cause respiratory disease. Many researchers have developed a variety of dust-proof masks that filter out fine dust. However, in order to increase the dust-proof efficiency, most commercial filters are made of relatively thick and dense microfiller, resulting in a significant pressure drop, which can lead to uncomfortable breathing. In this work, we developed electrospun polybenzimidazole (PBI) nanofiber filters, and investigated its PM 2.5 dust-proof filtering performance for potential use as dust-proof mask filters. The PBI has a high dipole moment (6.12 D) as confirmed by density function theory (DFT) calculations. The kelvin probe force microscope (KPFM) measurement confirms that the surface potential of the PBI nanofiber filter is higher than the surface potential of other commercial filters. The PBI air filter exhibits a high PM filtering efficiency (~ 98.5%) with much lower pressure drop (130 Pa) than commercial masks (pressure drop of 386 Pa) with similar filtering efficiency. We have also developed an effective cleaning method for filters contaminated with inorganic and organic PMs to reuse filters with negligible performance degradation. This research was supported by Creative Materials Discovery Program (NRF-2017M3D1A1039379) through the National Research Foundation of Korea(NRF) funded by Ministry of Science and ICT, and Korea Ministry of Environment (MOE) as “Advanced Technology Program for Environmental Industry Program”.
E-mail choara311@hanmail.net