一、前言离子交换膜的导电性与膜内网络结构(与交联度有关)、膜内交换基团的组成、膜内电荷量(或交换容量)有关,膜的电导取决于膜内异号离子电迁移的速度并为膜的微观结构提供一定的信息。从实用角度看,离子交换膜的导电性直接影响电渗析的耗电量,是膜的重要性能之一,而用户所关心的是膜的面电阻。测定膜电阻的方法大体可分为直流法和交流法两种。直流法使用四个电极的测量槽,外推法求得膜电阻。测量时,为排除膜面附近产生的极化 I. INTRODUCTION The conductivity of an ion-exchange membrane is related to the network structure within the membrane (related to the degree of crosslinking), the composition of the exchange groups in the membrane, the amount of charge in the membrane (or exchange capacity), and the conductance of the membrane depends on the sign The rate of ion electromigration and provides some information about the microstructure of the membrane. From a practical point of view, the ion exchange membrane conductivity directly affects the power consumption of electrodialysis, is one of the important performance of the membrane, and the user is concerned about the sheet resistance. Membrane resistance measurement method can be divided into two kinds of DC method and AC method. DC method using the four electrode measuring cell, extrapolation method to obtain the membrane resistance. Measurement, to exclude the membrane near the polarization generated