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Self-charging electrostatic face masks leveraging triboelectrification for prolonged air filtration

Author

Listed:
  • Zehua Peng

    (City University of Hong Kong)

  • Jihong Shi

    (City University of Hong Kong)

  • Xiao Xiao

    (University of California, Los Angeles)

  • Ying Hong

    (City University of Hong Kong)

  • Xuemu Li

    (City University of Hong Kong)

  • Weiwei Zhang

    (City University of Hong Kong)

  • Yongliang Cheng

    (Northwest University)

  • Zuankai Wang

    (City University of Hong Kong
    The Hong Kong Polytechnic University)

  • Wen Jung Li

    (City University of Hong Kong)

  • Jun Chen

    (University of California, Los Angeles)

  • Michael K. H. Leung

    (City University of Hong Kong
    City University of Hong Kong)

  • Zhengbao Yang

    (City University of Hong Kong
    Shenzhen Research Institute)

Abstract

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.

Suggested Citation

  • Zehua Peng & Jihong Shi & Xiao Xiao & Ying Hong & Xuemu Li & Weiwei Zhang & Yongliang Cheng & Zuankai Wang & Wen Jung Li & Jun Chen & Michael K. H. Leung & Zhengbao Yang, 2022. "Self-charging electrostatic face masks leveraging triboelectrification for prolonged air filtration," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35521-w
    DOI: 10.1038/s41467-022-35521-w
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    References listed on IDEAS

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    1. Haiyang Zou & Ying Zhang & Litong Guo & Peihong Wang & Xu He & Guozhang Dai & Haiwu Zheng & Chaoyu Chen & Aurelia Chi Wang & Cheng Xu & Zhong Lin Wang, 2019. "Quantifying the triboelectric series," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
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