Abstract

A model approach is developed, which enables one, using the concentration dependences of the diffusion permeability for individual layers, to estimate the density of a diffusion flux through a bilayer membrane, determine the concentration of a virtual solution at the interface between the membrane layers, and find the thickness of each layer that has constant diffusion characteristics. The approach is verified by the example of a perfluorinated MF-4SC membrane, with its surface being modified with polyaniline under different conditions. The adequacy of the approach is confirmed by a satisfactory coincidence of the modified layer thicknesses calculated in terms of the model and found by the optical examination of membrane sections.

中文翻译：

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双层离子交换膜扩散渗透性的模型描述

摘要

开发了一种模型方法，该方法可以使用各个层的扩散渗透率的浓度依赖性来估计通过双层膜的扩散通量的密度，确定膜层之间界面处虚拟溶液的浓度，并找出具有恒定扩散特性的每一层的厚度。以全氟化MF-4SC膜为例验证了该方法，该膜的表面在不同条件下被聚苯胺改性。该方法的适当性通过根据模型计算并通过对膜截面的光学检查发现的改性层厚度的令人满意的一致性来证实。