Spider‐Web‐Inspired PM0.3 Filters Based on Self‐Sustained Electrostatic Nanostructured Networks. Issue 29 (8th June 2020)

• Record Type: Journal Article
• Authors: Zhang, Shichao; Liu, Hui; Tang, Ning; Zhou, Sheng; Yu, Jianyong; Ding, Bin
• Is Part Of: Advanced materials. Volume 32:Issue 29(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-06-08
• Subjects: air filtration -- bioprotective equipment -- electrospraying–netting -- electrostatic -- fibrous network -- personal protective equipment (PPE); Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202002361
• Languages: English
• ISSNs: 0935-9648

Abstract

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. Abstract : A spider‐web‐inspired network generator (SWING)‐based air filter constructed from 2D electrostatic nanostructured networks is created by a unique electrospraying–netting technique. Due to the self‐sustained electrostatic adhesion driven by aeolian vibration and Steiner‐tree‐structured pores (size 200–300 nm) consisting of nanowires (diameter 12 nm), the SWING filters achieve >99.995% PM0.3 removal, <0.09% atmosphere pressure, >82% transmittance, and remarkable bioprotective activity.