Electrospun magnetic nanoparticle-decorated nanofiber filter and its applications to high-efficiency air filtration

Title
Electrospun magnetic nanoparticle-decorated nanofiber filter and its applications to high-efficiency air filtration
Authors
배귀남정재희김주영홍승찬
Keywords
Electrospun; Nanofiber; Filter; Magnetic; Nanoparticle
Issue Date
2017-10
Publisher
Environmental science & technology
Citation
VOL 51, NO 20-11975
Abstract
Filtration technology has been widely studied due to concerns about exposure to airborne dust, including metal oxide nanoparticles, which cause serious health problems. The aim of these studies has been to develop mechanisms for the continuous and efficient removal of metal oxide dusts. In this study, we introduce a novel air filtration system based on the magnetic attraction force. The filtration system is composed of a magnetic nanoparticle (MNP)-decorated nanofiber (MNP-NF) filter. Using a simple electrospinning system, we fabricated continuous and smooth electrospun nanofibers with evenly distributed Fe3O4 MNPs. Our electrospun MNPNF filter exhibited high particle collection efficiency (∼97% at 300 nm particle size) compared to the control filter (w/o MNPs, ∼ 68%), with a ∼ 64% lower pressure drop (∼17 Pa) than the control filter (∼27 Pa). Finally, the filter quality factors of the MNPNF filter were 4.7 and 11.9 times larger than those of the control filter and the conventional high-efficiency particulate air filters (>99% and ∼269 Pa), respectively. Furthermore, we successfully performed a field test of our MNP-NF filter using dust from a subway station tunnel. This work suggests that our novel MNP-NF filter can be used to facilitate effective protection against hazardous metal oxide dust in real environments.
URI
http://pubs.kist.re.kr/handle/201004/66312
ISSN
0013-936X
Appears in Collections:
KIST Publication > Article
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