亲水剂对磺化聚醚砜基阳离子交换膜结构与性能的影响  

Effect of hydrophilic agents on the structure and properties of cation exchange membranes based on sulfonated polyethersulfone

作　　者：赵津礼 陈青柏 王建友[1] ZHAO Jinli;CHEN Qingbai;WANG Jianyou(Nankai University,Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution,College of Environmental Science and Engineering,Tianjin 300350,China)

机构地区：[1]天津市跨介质复合污染环境治理技术重点实验室,南开大学环境科学与工程学院,天津300350

出　　处：《膜科学与技术》2020年第1期93-99,共7页Membrane Science and Technology

基　　金：国家重点研发计划(2017YFC0404003,2016YFC0400707);南开大学基本科研项目(20180017);天津市生态环境治理科技重大专项(18ZXSZSF00050);省部共建分离膜与膜过程国家重点实验室开放基金(M2-201703)。

摘　　要：以低磺化度磺化聚醚砜(SPES)为基质材料,与亲水剂聚乙烯吡咯烷酮K60(PVPK60)共混,通过改变SPES与PVP的质量比[m(SPES)/m(PVP)],制备阳离子交换膜(CEM),考察膜结构与性能.研究发现,随m(SPES)/m(PVP)的减小,CEM的力学性能先增加后降低,膜中PVP未发生明显泄露,膜稳定性良好;亲水性逐渐增加;膜表面规整,表面粗糙度先降低后增加;SPES与PVP相容性良好;电渗析脱盐(ED)测试表明m(SPES)/m(PVP)为6/4和5/5阳离子交换膜优于商品对照膜的脱盐效果.因此,m(SPES)/m(PVP)为6/4和5/5时,制备的CEM整体性能较为理想.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.

关 键 词：磺化聚醚砜 阳离子交换膜 脱盐 聚乙烯吡咯烷酮 

分 类 号：TQ028.8[化学工程]