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Construction and permeation/separation properties of terpolymer coating on nanofiltration membranes

Authors： SUN Jian, DENG You, ZHANG Peibin, ZHU Liping*, ZHU Baoku

Units： MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, P.R. China

KeyWords： nanofiltration membranes; terpolymer; surface coating; permeation and separation

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2016,36(4):60-66

Abstract：

A random terpolymerP(AMPS-Am-VI)was designed and synthesized via free radical polymerization of 2-acrylamido-2-methyl propanesulfonic acid, acrylamide, and N-vinylimidazole.The terpolymer was incorporated onto commercial TFCnanofiltration (NF) membranes by a simple dip-coating process to create a hydrophilic and antifouling layer.The changes in surface chemistry, morphology, hydrophilicity, and charge characteristics of the membrane after surface coating were characterized in detail. The effects of the coating conditions on membrane surface morphology and permeation/separationcharacteristics wereinvestigated anddiscussed. It was shown that the incorporation of terpolymer coating created a more hydrophilic, smooth, and neutral membrane surface without compromising the permeation/separation properties. The BSA filtration tests demonstrated that the antifouling ability of the modified membranes was improved significantly, with the flux recovery ratio being as high as 87.6%.

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Reference：

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