武汉工程大学学报2017，Vol.39Issue(5)：466-470,5.DOI:10.3969/j.issn.1674-2869.2017.05.011
分离膜孔结构的电化学交流阻抗谱表征
Characterization of Pore Structure in Separation Membrane by Electrochemical Impedance Spectroscopy
摘要
Abstract
An electrochemical characterization method was developed for probing the pore structure of separation membrane by electrochemical impedance spectroscopy obtained from electrochemical work station. A series of polysulfone membranes with different hole structures were prepared by altering the mass fraction of polyvinyl pyrrolidone (PVP). The hole structure and water flux of the membranes were evaluated by the electrochemical work station,the pore analyzer and the membrane performance tester. The results show that the resistance of the open pore decreases in separation membrane and the mean pore size and the water flux become larger when the mass fraction of PVP rises. We find an inverse relationship between the water flux and the pore resistance over the range of pore size from 10 nm to 40 nm,which can be well explained by the pore model, suggesting that the electrochemical impedance spectroscopy is an effective method for evaluating the open-pore structure of separation membrane.关键词
分离膜/孔结构/电化学交流阻抗谱/水通量Key words
separation membrane/pore structure/electrochemical impedance spectroscopy/water flux分类
通用工业技术引用本文复制引用
王帅,杨小波,刘海平,尹成,周伟琪,林志东,付萍,陈喆,张勇,吴江渝,海吉忠..分离膜孔结构的电化学交流阻抗谱表征[J].武汉工程大学学报,2017,39(5):466-470,5.基金项目
国家自然科学基金(NSFC11205118) （NSFC11205118）
青海盐湖资源综合利用重点实验室开放基金(Q-SYS-201516-KF-04, Q-SYS-201516-KF-05) （Q-SYS-201516-KF-04, Q-SYS-201516-KF-05）
