Wang Ru, Li Yuyao, Si Yang, Wang Fei, Liu Yitao, Ma Ying, Yu Jianyong, Yin Xia, Ding Bin
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University Shanghai 201620 China
Innovation Center for Textile Science and Technology, Donghua University Shanghai 200051 China.
Nanoscale Adv. 2019 Mar 25;1(5):1948-1956. doi: 10.1039/c9na00103d. eCollection 2019 May 15.
Emerging infectious diseases (EIDs) have been acknowledged as a major public health concern worldwide. Unfortunately, most protective respirators used to prevent EID transmission suffer from the disadvantage of lacking antimicrobial activity, leading to an increased risk of cross-contamination and post-infection. Herein, we report a novel and facile strategy to fabricate rechargeable and biocidal air filtration materials by creating advanced -halamine structures based on electrospun polyamide (PA) nanofibers. Our approach can endow the resultant nanofibrous membranes with powerful biocidal activity (6 log CFU reduction against ), an ultrahigh fine particle capture efficiency of 99.999% (N100 level for masks), and can allow the antibacterial efficacy and air filtration performance to be renewed in a one-step chlorination process, which has never been reported before. More importantly, for the first time, we revealed the synergistic effect involving the intrinsic structure of polymers and the assembling structure of nanofibers on the chlorination capacity. The successful fabrication of such a fascinating membrane can provide new insights into the development of nanofibrous materials in a multifunctional, durable, and renewable form.
新发传染病（EIDs）已被公认为全球主要的公共卫生问题。不幸的是，大多数用于预防新发传染病传播的防护口罩都存在缺乏抗菌活性的缺点，导致交叉污染和感染后风险增加。在此，我们报告了一种新颖且简便的策略，通过基于静电纺聚酰胺（PA）纳米纤维构建先进的卤胺结构，来制备可充电且具有杀菌功能的空气过滤材料。我们的方法能够赋予所得纳米纤维膜强大的杀菌活性（对[具体细菌名称]减少6个对数级的菌落形成单位）、99.999%的超高细颗粒捕获效率（口罩的N100等级），并且可以在一步氯化过程中使抗菌效果和空气过滤性能得以恢复，这在此前从未有过报道。更重要的是，我们首次揭示了聚合物的固有结构和纳米纤维的组装结构对氯化能力的协同作用。这种令人着迷的膜的成功制备可为多功能、耐用且可再生形式的纳米纤维材料的开发提供新的见解。
