Waterproof-breathable PTFE nano- and Microfiber Membrane as High Efficiency PM2.5 Filter

Authors :: Yun-Ze Long
Yuan Xu
Seeram Ramakrishna
Miao Yu
Tian-Tian Yue
Xiao-Xiong Wang
Ming-Liang Zhao
Xiao Li
Source :: Polymers, Volume 11, Issue 4, Polymers, Vol 11, Iss 4, p 590 (2019)
Publication Year :: 2019
Publisher :: MDPI AG, 2019.
Abstract: This study shows the feasibility of using electrospinning technique to prepare polytetrafluoroethylene/poly (vinyl alcohol) (PTFE/PVA) nanofibers on PTFE microfiber membrane as substrate. Then, PVA in the fiber membrane was removed by thermal treatment at about 350 &deg<br />C. Compared to PTFE microfiber substrates, the composite PTFE fiber membranes (CPFMs) have improved filtration efficiency by 70% and water contact angle by 23&deg<br />Experimental test data showed that the water contact angle of the sample increased from about 107&deg<br />to 130&deg<br />the filtration efficiency of PM2.5 increased from 44.778% to 98.905%, and the filtration efficiency of PM7.25 increased from 66.655% to 100% due to the electrospun PTFE nanofiber layer. This work demonstrates the potential of CPFMs as a filter for the production of indoor or outdoor dust removal and industrially relevant gas filtration.

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