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.
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This work was supported by the Russian Foundation for Basic Research, project no. 18-38-20069.
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Translated by E. Khozina
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Falina, I.V., Demina, O.A., Kononenko, N.A. et al. A Model Description of Diffusion Permeability of Bilayer Ion-Exchange Membranes. Colloid J 82, 200–207 (2020). https://doi.org/10.1134/S1061933X20010044
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DOI: https://doi.org/10.1134/S1061933X20010044