Monitoring the spontaneous wetting process of hydrophobic microporous membrane assisted by alternating current impedance spectroscopy

作     者：Juntian Xiao Qian Sun Liying Liu Zhongwei Ding Juntian Xiao;Qian Sun;Liying Liu;Zhongwei Ding

作者机构：Beijing Key Laboratory of Membrane Science and TechnologyCollege of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China Beijing Advanced Innovation Center for Soft Matter Science and EngineeringState Key Laboratory of Organic-Inorganic CompositesBeijing University of Chemical TechnologyBeijing 100029China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2021年第34卷第11期

页      面：96-102页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Fanatical support from the National Natural Science Foundation of China(21576011)and the kind supply of electrochemical workstation from Prof 

主　　题：Alternating current impedance Spontaneous membrane wetting Hydrophobic membrane Dynamic monitoring 

摘      要：In the process of membrane absorption,spontaneous wetting of hydrophobic microporous membrane causes membrane modification and increases membrane phase mass transfer resistance,which have attracted wide ***,due to the limitations of previous testing methods,the study of the spontaneous membrane wetting process is ***,we present a method for monitoring spontaneous membrane wetting by measuring its alternating current(AC)*** impedance tests of the PVDF flat membranes and hollow fiber membranes were conducted in a two-electrode *** results of equivalent circuit fitting indicate that the impedance value of the unwetted membrane is about 1.02×10^(10)Ω,which is close to the theoretical value of 1.4×10^(10)Ω,and this method can quantify the electrochemical impedance value of membranes with different degrees of spontaneous *** addition,a method of impedance test for real-time monitoring of spontaneous wetting was *** the experiment,the timeliness and continuity of this method are confirmed with exact judgment under different *** future work,the impedance data will be used to build model to predict the percentage of membrane wetting degree.