Experimental heterogeneous membranes with different particle sizes of cation-exchange resin KU-2–8 (the diameter of resin particles varied from 20 to 71 μm) were manufactured under the production conditions of LLC “IE “Shchekinoazot”. It is established that at currents higher than the limiting current the main mechanisms of electrolyte ion transport are classical electrodiffusion and electroconvection. It is shown for the first time that at the same degree of membrane polarization the fraction of electroconvection contribution increases, and the fraction of contribution of water splitting reaction products decreases with decreasing size of resin particles in membranes. The theoretical evaluation of the influence of the size of resin particles in the membrane on the internal parameters of electromembrane systems MK-40/0.01M NaCl solution has shown that the crucial role in the development of electroconvection is played not by the field effect, but by the peculiarities of electrical heterogeneity of the membrane surface.

中文翻译：

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用于超限电流电渗析的优化阳离子交换膜：膜中树脂颗粒尺寸与离子传输机制之间的相关性


在LLC“IE“Shchekinoazot”的生产条件下制造了不同粒径的阳离子交换树脂KU-2-8（树脂颗粒直径从20至71μm）的实验异质膜。已经确定，在高于极限电流的电流下，电解质离子传输的主要机制是经典的电扩散和电对流。首次表明，在相同的膜极化程度下，随着膜中树脂颗粒尺寸的减小，电对流贡献的分数增加，而水分解反应产物的贡献分数减少。膜中树脂颗粒尺寸对电膜系统MK-40/0.01M NaCl溶液内部参数影响的理论评估表明，电对流发展的关键作用不是由场效应发挥的，而是由场效应发挥的。通过膜表面电不均匀性的特性。