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ID 46762
file
creator
Balgis, Ratna
Murata, Hiroyuki
Kobayashi, Makoto
Bao, Li
abstract
Aerosol particle filtration in most penetrating particle size (MPPS) region is of great challenge for conventional nonwoven filter mats. The present work, therefore, redesigns conventional filter mats by introducing porous structure. A combination of thermally induced phase separation and breath figure mechanism was employed to synthesize porous cellulose triacetate fibers, in conjunction with the volatile solvent methylene chloride. The ambient humidity, the concentration of the polyvinylpyrrolidone (PVP) secondary polymer, and the ethanol cosolvent were all adjusted to modify the Taylor cone formation, jet stability,and fiber porosity. After fiber formation, the PVP was removed to obtain a superhydrophobic material. To distinguish the effect of pores, the performance of porous and nonporous nanofibers having similar sizes was conducted. Tests were performed using various dust particle sizes, and the results show that the collection efficiency of the porous fibers, resulting from particle diffusion, inertial impaction, and interception, was improved. Interestingly, the efficiency of the porous fibers in the MPPS region was exceptionally enhanced (up to 95%), demonstrating that the presence of dynamic pores greatly contributes to particle capture.
description
This research was supported by JSPS KAKENHI Grant-in-Aid numbers 26709061 and 16K13642 and by the Center for Functional Nano Oxides at Hiroshima University.
journal title
ACS Omega,
volume
Volume 3
issue
Issue 7
start page
8271
end page
8277
date of issued
2018-07-25
publisher
American Chemical Society
issn
2470-1343
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
© 2018 American Chemical Society, This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
relation url
department
Graduate School of Engineering