Partitioning and Polymerization of Pyrrole into Perfluorosulfonic Acid (Nafion) Membranes

Details of Nafion/polypyrrole composite formation have been obtained using electronic absorption spectroscopy. Three distinct processmonomer loading, polymerization, and removal of unreacted monomerhave been studied. Pyrrole loading displays a square root dependence on time, indicative of a diffus...

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Bibliographic Details
Published inThe journal of physical chemistry. B Vol. 107; no. 11; pp. 2480 - 2484
Main Authors Langsdorf, Brandi L, MacLean, Brian J, Halfyard, John E, Hughes, Jeremy A, Pickup, Peter G
Format Journal Article
LanguageEnglish
Published American Chemical Society 20.03.2003
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Summary:Details of Nafion/polypyrrole composite formation have been obtained using electronic absorption spectroscopy. Three distinct processmonomer loading, polymerization, and removal of unreacted monomerhave been studied. Pyrrole loading displays a square root dependence on time, indicative of a diffusion controlled partitioning process. Partitioning of pyrrole into Nafion, however, is complicated by protonation of pyrrole and acid-catalyzed oxidation to give oligomeric and polymeric species. These processes are affected by the presence of oxygen and are photosensitive. A variety of oxidizing agents have been used to effect polymerization including Fe3+, H2O2, ammonium persulfate, and UV irradiation.
Bibliography:istex:314E110DFF8E8EE5BCE819A918905381DAF2A4EE
ark:/67375/TPS-G287NF6B-P
ISSN:1520-6106
1520-5207
DOI:10.1021/jp026840c