膜科学与技术

Different SPES/PVP cation exchange membranes (S/P CEM) were prepared by blending hydrophilic polyvinylpyrrolidone (PVPK60) with sulfonated polyethersulfone (SPES) with low sulfonation degree. The structure and properties of S/P CEM were investigated. The shortcoming of low density of functional groups in the membranes was offset by improving the hydrophilicity of the membranes. The results showed that with the decrease of mass ratio of SPES to PVP, the mechanical properties of S/P CEM increased firstly and then decreased. The hydrophilicity gradually increased. The surface regularity of the membranes decreased, and the surface roughness decreased firstly and then increased. There was no obvious leakage of PVP in the membranes. The compatibility between SPES and PVP was good. The electrodialysis desalination (ED) test showed that the desalination effect of the ED device fitted with S-6/P-4 and S-5/P-5 CEM was better than that of the commercial control membrane. The overall performance of the S-6/P-4 CEM was the best.

第一作者简介：赵津礼（1987－），男，博士后；从事膜分离、电驱动膜技术研究；联系电话：13682065282；电子邮件：zhaojinli-1016@163.com 联系作者：王建友，教授；电子邮件：wangjy72@nankai.edu.cn

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