Nano-structured membranes with great properties are promising alternatives for water purification. However, it remains a challenge to develop such materials, especially for purifying water contaminated by pathogenic microbes. In this work, a newly-designed nanofibrous membrane with rechargeable biocidal function was prepared through grafting poly(vinyl alcohol-co-ethylene) (EVOH) with poly[5,5-dimethyl-3-(3′-triethoxysilylpropyl)-hydratoin] (PSPH) in the form of electrospun nanofibers. The proposed strategy intrinsically allows the N-halamine compounds to homogeneously and covalently integrate with EVOH nanofibers, bringing the membranes efficiently antimicrobial capability and durability. Moreover, the resultant chlorinated membranes exhibit characteristics of good mechanical property, superior hydrophilicity, renewable chlorination activity (>4000 ppm) and outstanding microbicidal performance (>99.999%), suggesting the composite materials could be used as filtration layers for bacteria-contaminated water disinfection with a favorable flux (>2000 L m⁻² h⁻¹). The successful fabrication strategy provides innovative insights into exploring other antifouling nanofibrous materials in a renewable way.

具有出色性能的纳米结构膜是水净化的有前途的替代品。然而，开发此类材料仍然是一个挑战，特别是用于净化被病原微生物污染的水。在这项工作中，通过将聚（乙烯醇-共-乙烯）（EVOH）与聚[5,5-二甲基-3-（3'-三乙氧基甲硅烷基丙基）-水合剂]接枝，制备了一种新设计的具有可充电杀菌功能的纳米纤维膜(PSPH) 以电纺纳米纤维的形式存在。提议的策略本质上允许N-卤胺化合物与 EVOH 纳米纤维均匀共价结合，使膜具有有效的抗菌能力和耐用性。此外，所得氯化膜具有良好的机械性能、优异的亲水性、可再生氯化活性（> 4000 ppm）和出色的杀菌性能（> 99.999％），表明该复合材料可用作细菌污染水消毒的过滤层具有有利的通量（>2000 L m ^-2  h ^-1）。成功的制造策略为以可再生方式探索其他防污纳米纤维材料提供了创新见解。