Abstract A novel microwave (MW)-based method was developed for in-situ cross-linking/polymerization of polyacrylic acid (PAA) onto hydrophilic polyvinylidene fluoride (PVDF) membrane for preparation of PVDFMW catalytic-membrane system. Unlike traditional thermal techniques, the use of MW radiation provided faster PAA polymerization and synthesis of PVDFMW membranes with excellent mechanical stability and high permeability. Air cooling and the dose-wise application of MW were the most influential parameters on the quality of PAA grafting and on the physical properties of PVDFMW membranes. Detailed surface characterization of PVDFMW revealed pores of the upper surface were occupied with PAA molecules. Nano zero-valent-iron (nZVI)-decorated PVDFMW membranes (nZVI-PVDFMW) were prepared and their catalytic activities were tested for the degradation of bisphenol A (BPA) in a cross-flow system. The nZVI-PVDFMW system demonstrated 52% ± 0.5 of BPA removal under low permeate flux (50 L/m2. h) in the presence of 10 mM of H2O2. The current study demonstrated MW is an advantageous technique for the preparation of composite membranes with ultra-fine morphology and improved its physical properties for use in water treatment applications.

中文翻译：

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用于水处理应用的亲水性聚偏二氟乙烯/聚丙烯酸 (PVDF/PAA) 膜的新型微波驱动合成和纳米零价铁 (nZVI) 装饰

摘要 开发了一种基于微波（MW）的新型聚丙烯酸（PAA）在亲水性聚偏二氟乙烯（PVDF）膜上原位交联/聚合制备PVDFMW催化膜体系的方法。与传统的热技术不同，使用 MW 辐射提供了更快的 PAA 聚合和 PVDFMW 膜的合成，具有优异的机械稳定性和高渗透性。空气冷却和 MW 的剂量应用是对 PAA 接枝质量和 PVDFMW 膜物理性能影响最大的参数。PVDFMW 的详细表面表征显示上表面的孔被 PAA 分子占据。制备了纳米零价铁 (nZVI) 修饰的 PVDFMW 膜 (nZVI-PVDFMW)，并测试了它们在错流系统中对双酚 A (BPA) 降解的催化活性。nZVI-PVDFMW 系统在存在 10 mM H2O2 的情况下，在低渗透通量 (50 L/m2. h) 下表现出 52% ± 0.5 的 BPA 去除率。目前的研究表明，MW 是制备具有超细形态的复合膜的一种有利技术，并改善了其用于水处理应用的物理性能。