聚丙烯腈
膜
高分子化学
结垢
材料科学
化学工程
生物污染
高分子科学
复合材料
聚合物
工程类
化学
生物化学
作者
Yingfang He,Siying An,Feng Ma,Xiang Shen
标识
DOI:10.1007/s11998-021-00574-x
摘要
The present work reports on the surface tethering of poly(sulfobetaine methacrylate) (PSBMA) hydrogel layers to enhance the fouling resistance of polyacrylonitrile-based membrane. An amphiphilic copolymer of poly(acrylonitrile-co-2-hydroxyethyl methacrylate) (PANHEMA) was prepared into the porous membrane, followed by the condensation reaction with acryloyl chloride to introduce C=C groups. Subsequently, the PSBMA hydrogel layers were immobilized onto the membrane surface via radical grafting copolymerization and quaternization with methylenebisacrylamide (MBA) as crosslinking agent and 2-(dimethylamino)ethyl methacrylate (DMAEMA) and 1,3-propanesultone (1, 3-PS) as the monomers. With the increasing concentration of monomers in the reaction mixture, the grafting degree of hydrogel layers increases, resulting in the improvement in membrane surface hydrophilicity. The membrane surface is easily covered by tethered hydrogel layers to form the granular structure, which greatly decreases the flux of membranes. The zwitterionic membranes are capable of separating oil/water emulsion with the rejection ratio of greater than 99%. Furthermore, the two-cycle filtration shows that the irreversible oil-fouling of membranes has been inhibited due to the introduction of zwitterionic hydrogel layers.
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