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Ion exchange properties and selectivity of PSS in an electrochemically switchable PPy matrix

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Abstract

A composite of polypyrrole (PPy) and polystyrenesulfonate (PSS) exchanges cations and is a promising material for the technical application of water softening. The ion exchange properties of electrochemically prepared PPy(PSS) are studied by investigating the polymer using a electrochemical quartz crystal microbalance (EQCM) and by analysing the solution surrounding the polymer by atomic adsorption spectroscopy (AAS). The exchange of cations by PPy(PSS) is found to be caused by three driving forces: electrochemical oxidation/reduction of PPy; chemical oxidation of PPy by dissolved oxygen; gradients of cation concentration between polymer and solution. The ion selectivity of PPy(PSS) is investigated and ion exchange isotherms for the binary systems Ca2+/Na+ and Ca2+/Mg2+ are determined.

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Acknowledgements

The authors thank the Bundesministerium für Wirtschaft und Arbeit and the AiF (contract No. 62 ZN ZUTECH) for financial support, and Dr. Bernd Görlach, University of Tübingen, for elemental analysis.

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Authors and Affiliations

  1. Karl-Winnacker-Institut der DECHEMA e.V., Theodor-Heuss-Allee 25, 60486, Frankfurt am Main, Germany

    K.-M. Mangold, C. Weidlich, J. Schuster & K. Jüttner

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  1. K.-M. Mangold
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  2. C. Weidlich
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  3. J. Schuster
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  4. K. Jüttner
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Correspondence to K. Jüttner.

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Mangold, KM., Weidlich, C., Schuster, J. et al. Ion exchange properties and selectivity of PSS in an electrochemically switchable PPy matrix. J Appl Electrochem 35, 1293–1301 (2005). https://doi.org/10.1007/s10800-005-9061-3

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  • DOI: https://doi.org/10.1007/s10800-005-9061-3

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