Spider-Web-Inspired PM<sub>0.3</sub> Filters Based on Self-Sustained Electrostatic Nanostructured Networks.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 32510646.
- Also identified by DOI 10.1002/adma.202002361 and PMC identifier 7300536.
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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 PM<sub>0.3</sub> /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% PM<sub>0.3</sub> 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.
Medical subject headings
- Air Filters
- Biomimetics
- Nanostructures
- Particulate Matter
- Spiders
- Static Electricity