Multilayer Sulfonated Polyhedral Oligosilsesquioxane (S-POSS)-Sulfonated Polyphenylsulfone (S-PPSU) Composite Proton Exchange Membranes
| Autor: | Pasco R. Santurri, Berryinne Decker, Peter I. Carver, Claire Hartmann-Thompson, Steven E. Keinath |
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| Rok vydání: | 2009 |
| Předmět: |
Conductive polymer
chemistry.chemical_classification Materials science Polyphenylsulfone General Chemical Engineering Composite number Proton exchange membrane fuel cell General Chemistry Polymer Conductivity chemistry.chemical_compound Membrane chemistry Nafion Materials Chemistry Composite material |
| Zdroj: | Chemistry of Materials. 22:942-948 |
| ISSN: | 1520-5002 0897-4756 |
| DOI: | 10.1021/cm901820s |
| Popis: | Single-layer proton exchange membranes (PEMs) have been under development for several decades. The current use of conductive polymers in PEM fuel cells has been limited primarily to single layered sulfonated fluoro polymers, e.g. Nafion. Although this architecture has certain positive characteristics, it lacks the robust properties required for use in high-temperature, low=humidity conditions. In this work, a multilayer composite PEM consisting of outer layers of sulfonated polyphenylsulfone (S-PPSU) and an inner layer blend of octa-sulfonated octaphenyl-POSS (S-POSS) and S-PPSU has been developed and shown to exhibit good conductivity, physical and chemical durability, and high strength. The multilayer composite PEM showed improved conductivity at 90 °C and 25% RH relative to analogous single-layer S-POSS-S-PPSU PEMs and to the typical sulfonated fluoro polymers currently in use. |
| Databáze: | OpenAIRE |
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