期刊
JOURNAL OF MEMBRANE SCIENCE
卷 493, 期 -, 页码 188-199出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2015.06.036
关键词
Reverse osmosis membrane; Anti-biofouling; High water flux; Zwitterionic polymer
资金
- National Natural Science Foundation of China [21276176]
- Public Science and Technology Research Funds Projects of Ocean [201405009]
- Science & technology Pillar Program of Tianjin [14ZCZDSF00006]
- Program of Introducing Talents of Discipline to Universities [B06006]
Biofouling is a critical problem to the development of reverse osmosis (RO) membrane technology. In this study, a commercial available aromatic polyamide RO membrane (TE membrane) was surface modified to improve its permselectivity and anti-biofouling property. The TE membrane was modified by the redox initiated graft polymerization of N,N'-dimethylaminoethyl methacrylater (DMAEMA), followed by the surface quaternization reaction with 3-bromopropionic acid (3-BPA) to obtain the zwitterionic carboxybetaine methacrylate (CBMA) polymer chains on the membrane surface and the modified membrane was named TE-PCBMA membrane. The grafting of DMAEMA and the quaternization reaction were analyzed by ATR-FTIR and XPS. The zeta analysis (at pH 7.0) indicated that the TE-PCBMA membrane surface was near neutrality, while the unmodified TE membrane surface was negative charged. The water flux of the TE-PCBMA membrane increased 22.55% than that of the unmodified membrane, while the salt rejections of the membranes were nearly the same. The proteins fouling tests (contaminations were positively charged lysozyme and negatively charged bovine serum albumin, pH 6.8), indicated that the water fluxes of the TE-PCBMA membrane all decreased less than those of the unmodified TE membrane, and after the membranes were cleaned, the water flux recovery rates of the TE-PCBMA membrane were higher than 92%, which were far higher than those of the unmodified TE membrane. Moreover, the mortality of Escherichia coli and Bacillus subtilis, after contacted with the TE-PCBMA membrane, could reach to 99%. The results indicated that the TE-PCBMA membrane had improved water flux, and was endowed easy cleaning, anti adhesive and anti microbial properties to prevent bacterial deposition and growth on the membrane surface. (C) 2015 Elsevier By. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据