Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 28, Issue 15, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201706680
Keywords
nylon fabrics; PM2.5; polytetrafluoroethylene (PTFE) fabrics; triboelectric air filters; washable filters
Categories
Funding
- Thousands Talents program for the pioneer researcher and his innovation team
- Minister of Science and Technology [2016YFA0202704]
- National Natural Science Foundation of China [51432005, 51608039, 5151101243, 51561145021]
- Natural Science Foundation of Beijing, China [4154090]
- Beijing Municipal Science & Technology Commission [Z171100000317001]
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Efficient removal of particulate matter (PM) is the major goal for various air cleaning technologies due to its huge impact on human health. Here, a washable high-efficiency triboelectric air filter (TAF) that can be used multiple times is presented. The TAF consists of five layers of the polytetrafluoroethylene (PTFE) and nylon fabrics. Compared with traditional electrostatic precipitator, which requires a high-voltage power supply, the TAF can be charged by simply rubbing the PTFE and nylon fabrics against each other. The electrical properties of the TAF are evaluated through the periodic contacting-separating of the PTFE and nylon fabrics using a linear motor, and an open-circuit voltage of 190 V is achieved. After charging, the TAF has a removal efficiency of 84.7% for PM0.5, 96.0% for PM2.5, which are 3.22 and 1.39 times as large as the uncharged one. Most importantly, after washing several times, the removal efficiency of the TAF maintains almost the same, while the commercial face mask drops to 70% of its original efficiency. Furthermore, the removal efficiency of the PM2.5 is very stable under high relative humidity. Therefore, the TAF is promising for fabricating a reusable and high-efficiency face mask.
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