Structure and Electrochemical Properties of Cation-Exchange Membranes Based on Partially Imidized Polyamidoacid |
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| Authors: | Kotov V. V. D'yakonova O. V. Sokolova S. A. Volkov V. I. |
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| Affiliation: | (1) Voronezh State Agricultural University, Voronezh, Russia;(2) Russian Academy of Sciences, Shubnikov Institute of Crystallography, Leninskii pr. 59, Moscow, 117333, Russia |
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| Abstract: | The transport of water molecules and the distribution of functional groups in polyamidoacid carboxyl-containing cation-exchange membranes based on pyromellitic acid are studied by NMR and ESR techniques. It is shown that the self-diffusion coefficients of water differ in the gel and intergel regions. Structural parameters of conducting channels in the gel regions are determined. In electrodialysis of one-component and binary solutions, polyamidoacid membranes possess higher transport numbers and separation coefficients of counterions that are less hydrated in solution. |
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