Impact of acid containing montmorillonite on the properties of Nafion membranes |
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| Authors: | Jean-Michel Thomassin,Giuseppe Caldarella,Albert Germain,Robert Jé rô me |
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| Affiliation: | a Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, B-4000 Liège, Belgium
b Laboratoire de Chimie Industrielle, Institut de Chimie B6, University of Liège, Sart Tilman, B-4000 Liège, Belgium |
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| Abstract: | The counter-ions of montmorillonite have been exchanged for ammonium cations containing either a sulfonic acid or a carboxylic acid in order to improve the performances of sulfonated membranes in direct methanol fuel cell. These layered silicates have been dispersed within Nafion® by solution mixing. Comparison with conventional organo-modified montmorillonite (Cloisite 30B) shows that the incorporation of carboxylic acid in the clay galleries improves the filler dispersion and, consequently, the methanol barrier properties. Moreover, the negative impact of Cloisite 30B on the ionic conductivity is restricted. |
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| Keywords: | Fuel cell Nafion Montmorillonite |
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