Si Yang, Li Jiaying, Zhao Cunyi, Deng Yue, Ma Yue, Wang Dong, Sun Gang
Materials Science and Engineering, Wuhan Textile University, Wuhan 430073, China.
ACS Biomater Sci Eng. 2017 May 8;3(5):854-862. doi: 10.1021/acsbiomaterials.7b00111. Epub 2017 Apr 10.
There is a critical need for new efficient solutions to purify and disinfect water from source to point-of-use, especially for the water contaminated by pathogenic microbes. Traditional disinfection technologies are chemically intensive and limited, either by biofouling or by the irreversible consumption of disinfectants. Herein, we present a scalable methodology to create biocidal and rechargeable nanofibrous membranes (BNF membranes) by combining -halamine antimicrobial agent with electrospun nanofibers. Our method allows intrinsically rechargeable -halamine moieties to covalently incorporate into nanofibers with high biocidal activity and durability. The resulting BNF membranes exhibit integrated properties of high porosity, large surface area, robust mechanical strength, super hydrophilicity, rechargeable chlorination capability (>3000 ppm), and high bactericidal efficacy (99.9999% contact-killing), which enabled the BNF membranes effectively disinfect bacteria-contained water by direct filtration, with promising high durability and fluxes (10000 L m h). The successful synthesis of BNF membranes also provides a versatile platform for exploring the antimicrobial -halamine materials in a self-supporting, structurally adaptive, and nanofibrous form.
迫切需要新的高效解决方案来对从水源到使用点的水进行净化和消毒，特别是对于被致病微生物污染的水。传统的消毒技术化学用量大且存在局限性，要么受到生物污垢影响，要么受到消毒剂的不可逆消耗影响。在此，我们提出一种可扩展的方法，通过将卤胺抗菌剂与电纺纳米纤维相结合来制备具有杀菌和可充电功能的纳米纤维膜（BNF膜）。我们的方法允许本质上可充电的卤胺部分以高杀菌活性和耐久性共价结合到纳米纤维中。所得的BNF膜具有高孔隙率、大表面积、强大的机械强度、超亲水性、可充电氯化能力（>3000 ppm）和高杀菌效果（99.9999%接触杀灭）等综合性能，这使得BNF膜能够通过直接过滤有效地对含细菌的水进行消毒，具有很高的耐久性和通量（10000 L m⁻² h⁻¹）。BNF膜的成功合成还为探索自支撑、结构适应性强的纳米纤维形式的抗菌卤胺材料提供了一个通用平台。
