Abstract Air pollution resulted from particulate matter (PM) has rendered great risks to the global safety concerns. However, most existing filters used for air filtration are usually thick, bulky, and suffer from the trade-off between filtration capability and air permeability. Here, for the first time, an innovative electronetting technique is reported to create continuous and totally integrated 2D ultrathin polyacrylonitrile nanonets with true nanoscale fiber diameters (~30 nm) and 2D spider-web-like network structures. Such ultrafine diameters combined with their small pore sizes (~0.26 μm) endowed the 2D nanonet filters with greatly enhanced PM capture capacity (PM0.3 removal efficiency of 99.996%). Meanwhile, the features of thin thickness (~0.4 μm), high porosity (92.1%), and ultra-light base weight (0.68 g m−2) allowed the filters to exhibit low air resistance of 73.5 Pa. This work may shed light on developing new type of high-performance air filters for environmental and public protection.

中文翻译：

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基于仿生超薄纳米纤维网络的高效超透气空气过滤器

摘要 颗粒物（PM）造成的空气污染给全球安全问题带来了巨大风险。然而，大多数现有的用于空气过滤的过滤器通常很厚、体积大，并且在过滤能力和透气性之间存在权衡。在这里，首次报道了一种创新的电渗技术，以创建具有真正纳米级纤维直径（~30 nm）和 2D 蜘蛛网状网络结构的连续且完全集成的 2D 超薄聚丙烯腈纳米网。这种超细直径与其小孔径（~0.26 μm）相结合，使二维纳米网过滤器具有大大增强的 PM 捕获能力（PM0.3 去除效率为 99.996%）。同时，厚度薄（~0.4 μm）、高孔隙率（92.1%）和超轻基重（0.