The effect of sulfonic acid groups within a polyhedral oligomeric silsesquioxane containing cross-linked proton exchange membrane
✍ Scribed by Ying-Chieh Yen; Yun-Sheng Ye; Chih-Chia Cheng; Chu-Hua Lu; Li-Duan Tsai; Jieh-Ming Huang; Feng-Chih Chang
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 896 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0032-3861
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✦ Synopsis
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 Â 10 À7 cm 2 /s), and high selectivity (1.14 Â 10 5 Ss/cm 3 ).