The longevity and reusability of N95-grade filtering facepiece respirators (N95 FFRs) are limited by consecutive donning and disinfection treatments. Herein, we developed stable N97 nanofibrous respirators based on chemically modified surface to enable remarkable filtration characteristics via polarity driven interaction. This was achieved by a thin-film coated polyacrylonitrile nanofibrous membrane (TFPNM), giving an overall long-lasting filtration performance with high quality factor at 0.42 Pa⁻¹ (filtration efficiency: over 97 %; pressure drop: around 10 Pa), which is higher than that of the commercial N95 FFRs (0.10–0.41 Pa⁻¹) tested with a flow rate of 5 L min⁻¹ and the 0.26 μm NaCl aerosol. A coxsackie B4 virus filtration test demonstrated that TFPNM also had strong virus capture capacity of 97.67 %. As compared with N95 FFRs, the TFPNM was more resistant to a wider variety of disinfection protocols, and the overall filtration characteristics remained N97 standard.

中文翻译：

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基于纳米纤维膜的极性主导的稳定 N97 呼吸器，用于捕获空气传播的病毒

N95 级过滤式面罩呼吸器 (N95 FFR) 的使用寿命和可重复使用性受到连续佩戴和消毒处理的限制。在此，我们开发了基于化学改性表面的稳定 N97 纳米纤维呼吸器，通过极性驱动的相互作用实现卓越的过滤特性。这是通过薄膜涂层聚丙烯腈纳米纤维膜 (TFPNM) 实现的，具有 0.42 Pa ^{-1 的}高品质因数（过滤效率：超过 97 %；压降：约 10 Pa），具有持久的整体过滤性能，高于在 5 L min ^-1流速和 0.26 μm NaCl 气溶胶下测试的商用 N95 FFR (0.10–0.41 Pa ^{-1 )。}柯萨奇B4病毒过滤测试表明，TFPNM还具有97.67%的强大病毒捕获能力。与 N95 FFR 相比，TFPNM 更能耐受更广泛的消毒方案，并且整体过滤特性仍保持 N97 标准。