Comparative analysis of the effect of ion-exchanger content in heterogeneous sulfonated ion-exchange membranes Ralex CM Pes produced by MEGA a.s. (Czech Republic) on their microstructure, current-voltage characteristics and intensity of electroconvective instability was carried out. Using the SEM method, it has been found that with an increase in resin content from 45 to 70 wt%, fraction of the ion-exchanger on the surface of swollen membranes increases 1.8 times, and the distance between them is halved. At the cross-section of membranes, the growth of fraction of ion-exchange regions is 46%. An increase in the resin loading into the membrane causes a 1.7-fold and a twofold increase in the fraction of macropore on the surface and on the cross-section, respectively.

With an increase in the ion-exchanger content in membranes, a decrease in the potential of the onset of the overlimiting state and a decrease in the plateau length of the limiting current on the current-voltage curve were revealed. It is shown that a change in resin/inert binder ratio determines the occurrence and development of heteroelectroconvection. Using laser interferometry and flicker noise spectroscopy, evidences of more intense electroconvective mixing of the solution at the boundary with the Ralex cation-exchange membrane with maximum resin loading were obtained.

比较了由MEGA as（Czech Republic）生产的非均质磺化离子交换膜Ralex CM Pes中离子交换剂含量对其微观结构，电流-电压特性和电对流不稳定性强度的影响。使用SEM方法，发现随着树脂含量从45wt％增加到70wt％，溶胀膜表面上离子交换剂的分数增加1.8倍，并且它们之间的距离减半。在膜的横截面处，离子交换区分数的增长为46％。树脂在膜中的负载增加导致表面和横截面上的大孔率分别增加1.7倍和2倍。

随着膜中离子交换剂含量的增加，在电流-电压曲线上显示出超限状态发生的电位降低和极限电流的平稳长度减小。结果表明，树脂/惰性粘合剂比率的变化决定了异电对流的发生和发展。使用激光干涉法和闪烁噪声光谱学，获得了在树脂负载最大的情况下，溶液与Ralex阳离子交换膜的边界处进行更强烈的电对流混合的证据。