A convenient crosslinking method for sulfonated poly(ether ether ketone) membranes via friedel–crafts reaction using 1,6‐dibromohexane and aluminum trichloride |
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| Authors: | Sanghee Han Mei‐Shan Zhang Junhwa Shin Youn‐Sik Lee |
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| Affiliation: | 1. Department of Energy Storage and Conversion Engineering, Chonbuk National University, Jeollabuk‐do, Republic of Korea;2. Division of Chemical Engineering Nanomaterials Processing Research Center, Chonbuk National University, Jeollabuk‐do, Republic of Korea;3. Department of Chemistry, College of Science, Yan Bian University, Yanji, People's Republic of China;4. Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jellabuk‐do, Republic of Korea |
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| Abstract: | In this study, sulfonated poly(ether ether ketone) (SPEEK) was very efficiently crosslinked via a Friedel–Craft reaction using 1,6‐dibromohexane and AlCl3. The resulting crosslinked SPEEK (c‐SPEEK) membranes exhibited improved dimensional stability, thermal and chemical stability, and mechanical strength with slight reduction in the elongation. The methanol permeability was reduced by approximately two orders of magnitude by the crosslinking reaction. The proton conductivities of c‐SPEEK membranes were greater than Nafion‐212 in the temperature range of 30–90°C. Overall, this new crosslinking method can be conveniently and efficiently applicable to most aromatic hydrocarbon polymer membranes. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40695. |
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| Keywords: | batteries crosslinking fuel cells membranes |
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