Spider-Web-Inspired PM0.3 Filters Based on Self-Sustained Electrostatic Nanostructured Networks
Spider-Web-Inspired PM0.3 Filters Based on Self-Sustained Electrostatic Nanostructured Networks
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DOI：
10.1002/adma.202002361
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发表时间：
2020-06-08
影响因子：
29.4
通讯作者：
Ding, Bin
中科院分区：
文献类型：
--
作者：
Zhang, Shichao;Liu, Hui;Ding, Bin
颗粒物污染已成为一个严重的公共卫生问题，特别是随着新发传染病的爆发。然而，目前大多数过滤器体积庞大，不透明，并且表现出低效率的PM0.3/病原体拦截和PM去除与透气性之间的不可避免的权衡。在这里，一种独特的电喷雾网技术被用来制造蜘蛛网启发的网络发生器（SWING）空气过滤器。通过控制泰勒锥的动力学和喷射液滴的相分离，可以大规模地生成二维自充电纳米结构网络。由此产生的SWING过滤器在风振驱动下显示出特殊的远程静电特性，使PM能够自我持续粘附。与直径为12 nm的纳米线组成的斯坦纳树状孔（大小为200-300 nm）相结合，SWING过滤器具有高效率（bb0 99.995%），低空气阻力（82%），对生物危害病原体具有显著的生物保护活性。这项工作可能为设计用于环境和能源应用的新型纤维材料提供启示。
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 (82%), and remarkable bioprotective activity for biohazard pathogens. This work may shed light on designing new fibrous materials for environmental and energy applications.