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Surface-modified polymer nanofiber membrane for high-efficiency microdust capturing
- Source :
- Chemical Engineering Journal. 339:204-213
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- 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 μm (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 (TWHO 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 μg m−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 (
- Subjects :
- Pressure drop
General Chemical Engineering
Airflow
02 engineering and technology
General Chemistry
Particulates
Surface engineering
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Industrial and Manufacturing Engineering
0104 chemical sciences
Chemical engineering
Filter (video)
Nanofiber
Environmental Chemistry
Air purifier
0210 nano-technology
Air filter
Subjects
Details
- ISSN :
- 13858947
- Volume :
- 339
- Database :
- OpenAIRE
- Journal :
- Chemical Engineering Journal
- Accession number :
- edsair.doi...........95efb138c1ccb89fdef04211cc4769a0