Fluorene-containing poly(arylene ether sulfone nitrile)s multiblock copolymers as anion exchange membranes |
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| Affiliation: | 1. College of Chemical Engineering, Huaqiao University, Xiamen, 361021, PR China;2. College of Materials Science and Engineering, Fujian University of Technology, Fuzhou, 350118, PR China;1. College of Chemical Engineering, Changchun University of Technology, China;2. School of Materials Science and Engineering, Changchun University of Technology, China;3. Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China;1. Key Laboratory of Applied Surface and Colloid Chemistry (MOE), School of Materials Science and Engineering, Shaanxi Normal University, Xi''an 710062, PR China;2. Xi''an Modern Chemistry Research Institute, Xi''an 710065, PR China;1. State Key Laboratory of Fine Chemicals, School of Chemical Engineering, School of Petroleum and Chemical Engineering, Dalian University of Technology, 2 Dagong Road, Panjin, LN 124221, China;2. Panjin Institute of Industrial Technology, Dalian University of Technology, 2 Dagong Road, Panjin, LN 124221, China |
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| Abstract: | A series of novel fluorene-containing poly(arylene ether sulfone nitrile)s (FPESN-m/n) multiblock copolymers bearing 1,2-dimethylimidazole groups (ImFPESN-m/n) were synthesized for preparing anion exchange membranes (AEMs). Bromination rather than chloromethylation was used in this work. The bulky and rigid fluorene groups were introduced to force each chain apart to create large interchain spacing. Strong polar nitrile groups were introduced into the hydrophobic segments with the intention of enhancing the anti-swelling property of the AEMs. The length of fluorene–containing hydrophobic segment was varied to study the structure–property of the AEMs. With the ion groups anchored selectively and densely on the hydrophilic segments, all the AEMs exhibited well-defined hydrophilic/hydrophobic microphase-separated structures. As a result, the AEMs showed high hydroxide conductivities in the range of 35.2–118.3 mS cm−1 from 30 to 80 °C and superb ratios of ionic conductivity to swelling at 80 °C. Furthermore, the AEMs also exhibited good mechanical properties, thermal and alkaline stabilities. |
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| Keywords: | Anion exchange membranes poly(arylene ether sulfone nitrile)s Multiblock copolymers Fluorene groups Conductivity |
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