The excessive use of fluoride in fibrous membranes poses significant bioaccumulative threats to the environment and human health. However, most existing membranes used in protective clothing and desalination systems show high fluorine dependence and inevitable trade-offs between liquid repellency and breathability. Herein, fluorine-free bonded scaffolded nanofiber/network membranes are developed using the electro-coating-netting technique to achieve high-performance liquid-repellency and breathability. By manipulating the stretching of electrospun jets and the polarization of electrets, rough and electrostatic wetting nanofibers are obtained as scaffolds, on which long-chain alkyl precursors are coated to assemble 2D networks consisting of nanowires with diameters of ∼42 nm and bonding points. The resultant fluorine-free membranes exhibit small pore sizes of ∼460 nm, highly interconnected tortuous channels, a water contact angle of ∼138°, and elastic elongation up to 300%, thereby providing both high-performance liquid repellency (125 kPa) and vapor permeability (4206 g m^–2 d^–1), making them effective for use in protective clothing and desalination. This work could inspire innovative design of ecofriendly nanofibrous materials for high-performance filtration and separation.

中文翻译：

---

无氟纳米纤维/网络膜，具有互连的曲折通道，可实现高性能的防液性和透气性


在纤维膜中过度使用氟化物对环境和人类健康构成重大生物累积威胁。然而，大多数用于防护服和海水淡化系统的现有膜都显示出高度的氟依赖性，并且不可避免地需要在液体疏斥性和透气性之间进行权衡。在此，使用电泳涂层网技术开发了无氟粘合支架纳米纤维/网络膜，以实现高性能的拒液性和透气性。通过纵静电纺丝射流的拉伸和驻极体的极化，获得粗糙和静电润湿纳米纤维作为支架，在其上涂覆长链烷基前驱体以组装由直径为 ∼42 nm 的纳米线和键合点组成的 2D 网络。所制备的无氟膜具有 ∼460 nm 的小孔径、高度互连的曲折通道、∼138° 的水接触角和高达 300% 的弹性伸长率，从而提供高性能的拒液性 （125 kPa） 和透气性 （4206 g m^–2 d^–1），使其可有效用于防护服和海水淡化。这项工作可以激发用于高性能过滤和分离的环保纳米纤维材料的创新设计。