期刊
CHEMICAL ENGINEERING JOURNAL
卷 339, 期 -, 页码 204-213出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.01.121
关键词
PM2.5 filter; Electrospun nanofiber membrane; Surface modification; Microdust capture; Car interior air purifier
资金
- Brain Research Program and Basic Science Research Program through National Research Foundation of Korea (NRF) - Ministry of Science and ICT (MSIT) [NRF-2016M3C7A1905384, NRF-2015R1A2A2A01007166]
- BioNanoHealth-Guard Research Center
- Center for Integrated Smart Sensors (CISS) - MSIT [H-GUARD_2014M3A 6B2060489, 2011-0031870]
- KRIBB Initiative Research Program
- National Research Council of Science & Technology (NST), Republic of Korea [KGM1121824] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2016M3C7A1905384, 2015R1A2A2A01007166, 2015M3A6A6066117, 2017H1A2A1042758] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Particulate matter (PM) pollution is serious human health issue. Various filter technologies have been developed to improve the air filtration efficiency. Recently, nanofibrous membrane filters have received much attention due to its outstanding transparency and high efficiency for PM <= 2.5 mu m (PM2.5) capture/removal compared to conventional micro-structured filters. Although these filters provide high-efficiency PM2.5 capture, obtaining strong PM adhesion via surface engineering remains a challenge. In this study, we demonstrate a high efficiency PM2.5 capture air-filter by electrospun polyacrylonitrile nanofibers (EPNFs). The surface of the EPNFs was modified by oxygen plasma treatment for generating functional groups such as -CONH2, -COOH and -COOR. The EPNFs were utilized as air filter in hand-made PM removal system which is consisted of DC power supply, PM source, PM sensor and PM removal test chamber. The test result showed high air flow and effective air filtration (PM2.5 removal efficiency: 94.02%, pressure drop: 18 Pa, Time to reach the PM level recommended by the World Health Organization (T-WHO (PM2.5)): 15 min, quality factor: 0.1564 Pa-1) compared to commercial filters. The intermolecular interaction between the plasma-treated EPNFs (PEPNFs) and PMs was investigated by density functional theory (DFT) calculations. The PEPNF filter showed high long-term reproducibility in a cycle test with a high PM concentration (over 2,000 mu gm(-3)). The filter was applied as a car interior air purifier using a cigar jack as a power supply, ca. 16 min was required to reach the PM level recommended by the World Health Organization (<25 mu gm(-3)).
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