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Percolation Effects in Ion-Exchange Materials

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Abstract

The dependence of conductivity κ m of homogeneous and heterogeneous ion-exchange materials on the volume fraction of a conducting hydrophilic phase fwas studied. Approaches of the percolation theory were used to analyze the data obtained. Parameters appearing in the percolation equation κ m = κ0( f – f cr)t were determined for the description of the conductivity behavior during water desorption from heterogeneous ion-exchange membranes, and in the preparation of various polymeric compositions from a conducting component distributed in the nonconducting medium. The obtained values of the critical exponent tagree with the theoretical value (t = 1.6 ± 0.4) for all the materials studied. The dependence of the percolation threshold f cr on the structural organization of ion-exchange materials was determined.

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Authors and Affiliations

  1. Kuban State University, ul. Stavropol'skaya 149, Krasnodar, 350040, Russia

    N. P. Berezina & L. V. Karpenko

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  1. N. P. Berezina
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  2. L. V. Karpenko
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Berezina, N.P., Karpenko, L.V. Percolation Effects in Ion-Exchange Materials. Colloid Journal 62, 676–684 (2000). https://doi.org/10.1023/A:1026670423208

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