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Open AccessArticle

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

1
Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China
2
Industrial Research Institute of Nonwovens & Technical Textiles, College of Textiles & Clothing, Qingdao University, Qingdao 266071, China
3
Department of Mechanical Engineering, Columbia University, New York, NY 10027, USA
4
Center for Nanofibers & Nanotechnology, Faculty of Engineering, National University of Singapore, Singapore
*
Author to whom correspondence should be addressed.
These two authors contributed to this work equally.
Polymers 2019, 11(4), 590; https://doi.org/10.3390/polym11040590
Received: 28 February 2019 / Revised: 22 March 2019 / Accepted: 25 March 2019 / Published: 1 April 2019
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 °C. Compared to PTFE microfiber substrates, the composite PTFE fiber membranes (CPFMs) have improved filtration efficiency by 70% and water contact angle by 23°. Experimental test data showed that the water contact angle of the sample increased from about 107° to 130°, 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. View Full-Text
Keywords: electrospinning; PTFE nanofiber membrane; air filter; PM electrospinning; PTFE nanofiber membrane; air filter; PM
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MDPI and ACS Style

Li, X.; Wang, X.-X.; Yue, T.-T.; Xu, Y.; Zhao, M.-L.; Yu, M.; Ramakrishna, S.; Long, Y.-Z. Waterproof-breathable PTFE nano- and Microfiber Membrane as High Efficiency PM2.5 Filter. Polymers 2019, 11, 590.

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