TY - JOUR
T1 - Self-charging electrostatic face masks leveraging triboelectrification for prolonged air filtration
AU - Peng, Zehua
AU - Shi, Jihong
AU - Xiao, Xiao
AU - Hong, Ying
AU - Li, Xuemu
AU - Zhang, Weiwei
AU - Cheng, Yongliang
AU - Wang, Zuankai
AU - Li, Wen Jung
AU - Chen, Jun
AU - Leung, Michael K.H.
AU - Yang, Zhengbao
N1 - Funding Information:
The work described in this paper was supported by General Research Grants (Project Nos. 11212021 and 11210822) from the Research Grants Council of the Hong Kong Special Administrative Region, Innovation and Technology Fund (Project No. ITS/065/20) from Innovation and Technology Commission of Hong Kong Special Administrative Region, Shenzhen Fundamental Research Program (No. JCYJ20200109143206663), National Natural Science Foundation of China (No. 11902282), and City University of Hong Kong (No. 6000765).
Publisher Copyright:
© 2022, The Author(s).
PY - 2022/12
Y1 - 2022/12
N2 - Electrostatic adsorption is an important complement to the mechanical filtration for high-efficiency air filtering. However, the electrostatic charge decays with time, especially in humid conditions. In this work, a self-charging air filter is presented to capture airborne particles in an efficient and long-lasting manner without the need of external power sources. Leveraging the triboelectric effect between the electrospun poly(vinylidene fluoride) nanofiber film and nylon fabric, the self-charging air filter-based mask excited by breathing can continuously replenish electrostatic charges. As a result, its effective lifespan is up to 60 hours (including 30 hours of wearing), with a minimum filtration efficiency of 95.8% for 0.3-μm particles. The filtration efficiency and lifespan are significantly higher than those of a commercial surgical mask. Furthermore, we uncover the quantitative relation between filtration efficiency and surface electrostatic potential. This work provides an effective strategy to significantly prolong the electrostatic adsorption efficacy for high-performance air-filtering masks.
AB - Electrostatic adsorption is an important complement to the mechanical filtration for high-efficiency air filtering. However, the electrostatic charge decays with time, especially in humid conditions. In this work, a self-charging air filter is presented to capture airborne particles in an efficient and long-lasting manner without the need of external power sources. Leveraging the triboelectric effect between the electrospun poly(vinylidene fluoride) nanofiber film and nylon fabric, the self-charging air filter-based mask excited by breathing can continuously replenish electrostatic charges. As a result, its effective lifespan is up to 60 hours (including 30 hours of wearing), with a minimum filtration efficiency of 95.8% for 0.3-μm particles. The filtration efficiency and lifespan are significantly higher than those of a commercial surgical mask. Furthermore, we uncover the quantitative relation between filtration efficiency and surface electrostatic potential. This work provides an effective strategy to significantly prolong the electrostatic adsorption efficacy for high-performance air-filtering masks.
UR - http://www.scopus.com/inward/record.url?scp=85144297746&partnerID=8YFLogxK
U2 - 10.1038/s41467-022-35521-w
DO - 10.1038/s41467-022-35521-w
M3 - Journal article
C2 - 36539426
AN - SCOPUS:85144297746
SN - 2041-1723
VL - 13
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 7835
ER -