SPEEK based composite PEMs containing tungstophosphoric acid and modified with benzimidazole derivatives
| Autor: | Raquel Santos Mauler, Ailton S. Gomes, Ueiler Lisoski Duarte, Fabrício Celso, Serge Kaliaguine, Serguei D. Mikhailenko |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
chemistry.chemical_classification
Benzimidazole Materials science Hydrogen Composite number chemistry.chemical_element Filtration and Separation Polymer Conductivity Biochemistry chemistry.chemical_compound Membrane chemistry Chemical engineering Nafion Polymer chemistry medicine General Materials Science Physical and Theoretical Chemistry Swelling medicine.symptom |
| Zdroj: | Journal of Membrane Science. 336:118-127 |
| ISSN: | 0376-7388 |
| DOI: | 10.1016/j.memsci.2009.03.017 |
| Popis: | Composite SPEEK based PEMs, containing tungstophosphoric acid (TPA) and modified with benzimidazole derivatives as cross-linking spacers, were prepared and characterized by a number of physico-chemical methods. It was observed, that the cross-linking agents strongly affect membrane properties, reducing their swelling, but at the same time decreasing their proton conductivity. However the cross-linkers provided a better retention of the TPA particles embedded within the composite membranes. The TPA particles enhanced the polymer conductivity to values overpassing that of the non-modified membranes. The performance of the PEMs was tested in hydrogen/air FC and found to be superior to that of Nafion 212 commercial PEM. The stability of the composite PEMs was adequate at least for 2 days, during which no degradation of the performance was observed. |
| Databáze: | OpenAIRE |
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