Partitioning and polymerization of pyrrole into perfluorosulfonic acid (Nafion) membranes

被引：29

作者：

Langsdorf, BL ^{[1
]}

MacLean, BJ ^{[1
]}

Halfyard, JE ^{[1
]}

Hughes, JA ^{[1
]}

Pickup, PG ^{[1
]}

机构：

[1] Mem Univ Newfoundland, Dept Chem, St Johns, NF A1B 3X7, Canada

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2003年 / 107卷 / 11期

关键词：

D O I：

10.1021/jp026840c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：2480 / 2484

页数：5

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