生物污染
两性离子
膜
化学
牛血清白蛋白
嫁接
高分子化学
化学工程
色谱法
有机化学
聚合物
分子
生物化学
工程类
作者
Dong Yan Zhang,Shu Xiong,Yu Shi,J. Zhu,Qiao Li Hu,Jie Liu,Yan Wang
出处
期刊:Chemosphere
[Elsevier]
日期:2018-05-01
卷期号:198: 30-39
被引量:38
标识
DOI:10.1016/j.chemosphere.2018.01.120
摘要
In order to improve the water flux and antifouling property of polyimide (PI) membrane, zwitterions are grafted on PI membrane surface via a two-step modification route by reactions with N,N-diethylethylenediamine (DEDA) and 1,3-propane sultone (PS) sequentially. The reaction mechanism and physicochemical properties of membranes are confirmed via various characterization techniques. The anti-biofouling performance of the zwitterion-grafted PI membranes is evaluated by bacterial suspension immersion tests in Escherichia coli (E. coli) and staphylococcus aureus (S. aureus) solutions. The antifouling property is assessed via the filtration test using the bovine serum albumin (BSA) and dodecyl trimethyl ammonium bromide (DTAB) aqueous feed solutions. The effect of the reaction time with DEDA in the zwitterion-grafted process on the antifouling property is further investigated systematically. The results show that both the anti-biofouling and antifouling performances of zwitterion-grafted PI membranes are significantly improved.
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