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The effect of sulfonic acid groups within a polyhedral oligomeric silsesquioxane containing cross-linked proton exchange membrane |
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| Authors: | Ying-Chieh Yen Chih-Chia Cheng Li-Duan Tsai Feng-Chih Chang |
| Affiliation: | a Institute of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan b Material and Chemical Research Laboratories, Industrial Technology Research Institute, Chutung, Taiwan c Department of Chemical and Materials Engineering, Van Nung Institute of Technology, Chungli, Taiwan |
| Abstract: | In this study, polyhedral oligomeric silsesquioxane (POSS) moieties were incorporated into sulfonated poly(ether ether ketone) (SPEEK) to form a new cross-linked proton exchange membrane (PEM). The distribution of the POSS containing cross-linkers with or without sulfonic acid groups dictates the water behavior and connectivity of hydrophilic domains of the PEM. A PEM formed by incorporating 17.5 wt% of the cross-linker (containing POSS macromer and sulfonic acid groups) into SPEEK exhibits high proton conductivity (0.0153 S/cm), low methanol permeability (1.34 × 10−7 cm2/s), and high selectivity (1.14 × 105 Ss/cm3). |
| Keywords: | POSS PEM SPEEK |
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