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The self-diffusion of water and saturated aliphatic alcohols in cation-exchange membranes

  • Physical Chemistry of Surface Phenomena
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Abstract

The self-diffusion of water, methanol, ethanol, isopropanol, and butanol in membranes based on polyethylene and sulfonated copolymer of styrene and divinylbenzene (MK-100) and membranes based on sulfo-containing aromatic polyamides (PA) and a copolymer of 1,2,4,5-benzenetetracarboxylic acid with 4,4′-diaminodiphenyl oxide (PAK) was investigated by the pulsed magnetic field gradient NMR technique. In MK-100 sulfo cation-exchange membranes and PAK carboxylic membranes, two types of sorbate molecules with translational mobilities differing by an order of magnitude were observed. It was established that, in these membranes, the major diffusant portion was transferred trough transport channels formed by functional groups of membranes, counterions, and diffusant molecules (ionogenic channels). The conclusion was drawn that, in PA membranes, water and alcohol molecules were distributed uniformly and carbonyl croups of the polymeric matrix participated in the formation of transport channels. Relations between the structure of membranes, the character of diffusant-polymeric matrix interaction, and the translational mobility of sorbate molecules were found.

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia

    V. I. Volkov

  2. Glinka State Agricultural University, Voronezh, Russia

    V. V. Kotov & G. A. Netesova

Authors
  1. V. I. Volkov
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  2. V. V. Kotov
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  3. G. A. Netesova
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Correspondence to V. I. Volkov.

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Original Russian Text © V.I. Volkov, V.V. Kotov, G.A. Netesova, 2008, published in Zhurnal Fizicheskoi Khimii, 2008, Vol. 82, No. 7, pp. 1337–1341.

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Volkov, V.I., Kotov, V.V. & Netesova, G.A. The self-diffusion of water and saturated aliphatic alcohols in cation-exchange membranes. Russ. J. Phys. Chem. 82, 1184–1188 (2008). https://doi.org/10.1134/S0036024408070236

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  • DOI: https://doi.org/10.1134/S0036024408070236

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