Zwitterion Co-Polymer PEI-SBMA Nanofiltration Membrane Modified by Fast Second Interfacial Polymerization
Zwitterion Co-Polymer PEI-SBMA Nanofiltration Membrane Modified by Fast Second Interfacial Polymerization
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DOI：
10.3390/polym12020269
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发表时间：
2020-02-01
期刊：
影响因子：
5
通讯作者：
Lai, Juin-Yih
中科院分区：
文献类型：
--
作者：
Chiao, Yu-Hsuan;Patra, Tanmoy;Lai, Juin-Yih
纳滤膜以其低能耗和环境友好的操作条件，已成为解决清洁水短缺和废水处理工艺的一种有前途的解决方案。薄膜复合纳滤膜具有高渗透性、优异的防污和抗菌性能，是污水处理和清洁饮用水生产装置的重要组成部分。在本研究范围内，采用聚丙烯腈（PAN）为载体，通过接枝聚胺和两性离子甲基丙烯酸磺丁烷基团，采用快速二次界面聚合改性的方法制备了薄膜复合纳滤膜。利用ATR-FTIR光谱、XPS分析、FESEM和AFM成像等方法表征了膜的化学和物理结构变化。研究了二次界面聚合对聚酰胺层和“离子对”特性的影响，以及水接触角和表面电荷分析与纳滤性能的关系。此外，还利用牛血清白蛋白和溶菌酶等模型蛋白污染物对膜的防污性能进行了评价。以大肠杆菌为模型生物污染物，研究了改性膜的抗菌性能。总体而言，在不影响纳滤膜选择层的情况下，对二次界面聚合的影响进行了详细的研究。
Nanofiltration membranes have evolved as a promising solution to tackle the clean water scarcity and wastewater treatment processes with their low energy requirement and environment friendly operating conditions. Thin film composite nanofiltration membranes with high permeability, and excellent antifouling and antibacterial properties are important component for wastewater treatment and clean drinking water production units. In the scope of this study, thin film composite nanofiltration membranes were fabricated using polyacrylonitrile (PAN) support and fast second interfacial polymerization modification methods by grafting polyethylene amine and zwitterionic sulfobutane methacrylate moieties. Chemical and physical alteration in structure of the membranes were characterized using methods like ATR-FTIR spectroscopy, XPS analysis, FESEM and AFM imaging. The effects of second interfacial polymerization to incorporate polyamide layer and 'ion pair' characteristics, in terms of water contact angle and surface charge analysis was investigated in correlation with nanofiltration performance. Furthermore, the membrane characteristics in terms of antifouling properties were evaluated using model protein foulants like bovine serum albumin and lysozyme. Antibacterial properties of the modified membranes were investigated using E. coli as model biofoulant. Overall, the effect of second interfacial polymerization without affecting the selectivity layer of nanofiltration membrane for their potential large-scale application was investigated in detail.