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Structure and hydration processes in perfluorinated bilayer cation-exchange membranes

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Abstract

Based on perfluorinated polymers MF-4SK and F-4KF bilayer composite ion-exchange membranes are studied by using the magic-angle-rotation NMR, electrochemical impedance spectroscopy, scanning electron microscopy, and electron-probe microanalysis. It is shown that the contact of the polymers includes an interlayer, approximately 5 μm thick. The NMR data point to slow water-molecules-exchange between hydrate-complexes of sulfo- and carboxyl-groups.

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Correspondence to S. L. Shestakov.

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Original Russian Text © S.L. Shestakov, E.V. Korostylev, S.V. Timofeev, A.V. Maksimychev, S.G. Vasil’ev, E.A. Sanginov, Yu.A. Dobrovol’skii, V.I. Volkov, 2011, published in Elektrokhimiya, 2011, Vol. 47, No. 4, pp. 420–428.

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Shestakov, S.L., Korostylev, E.V., Timofeev, S.V. et al. Structure and hydration processes in perfluorinated bilayer cation-exchange membranes. Russ J Electrochem 47, 395–403 (2011). https://doi.org/10.1134/S102319351104015X

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  • DOI: https://doi.org/10.1134/S102319351104015X

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