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Spider-Web-Inspired PM0.3 Filters Based on Self-Sustained Electrostatic Nanostructured Networks |
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| Authors: | Shichao Zhang Hui Liu Ning Tang Sheng Zhou Jianyong Yu Bin Ding |
| Affiliation: | 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai, 201620 China Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 200051 China Department of Orthopedics, School of Medicine, West Virginia University, Morgantown, WV, 26506 USA;2. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai, 201620 China Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 200051 China;3. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai, 201620 China;4. Department of Orthopedics, School of Medicine, West Virginia University, Morgantown, WV, 26506 USA |
| Abstract: | Particulate matter (PM) pollution has become a serious public health issue, especially with outbreaks of emerging infectious diseases. However, most present filters are bulky, opaque, and show low-efficiency PM0.3/pathogen interception and inevitable trade-off between PM removal and air permeability. Here, a unique electrospraying–netting technique is used to create spider-web-inspired network generator (SWING) air filters. Manipulation of the dynamic of the Taylor cone and phase separation of its ejected droplets enable the generation of 2D self-charging nanostructured networks on a large scale. The resultant SWING filters show exceptional long-range electrostatic property driven by aeolian vibration, enabling self-sustained PM adhesion. Combined with their Steiner-tree-structured pores (size 200–300 nm) consisting of nanowires (diameter 12 nm), the SWING filters exhibit high efficiency (>99.995% PM0.3 removal), low air resistance (<0.09% atmosphere pressure), high transparency (>82%), and remarkable bioprotective activity for biohazard pathogens. This work may shed light on designing new fibrous materials for environmental and energy applications. |
| Keywords: | air filtration bioprotective equipment electrospraying–netting electrostatic fibrous network personal protective equipment (PPE) |