芳烯
共聚物
芴
砜
乙醚
腈
高分子化学
膜
材料科学
化学
离子交换
热稳定性
离子
聚合物
有机化学
芳基
烷基
生物化学
作者
Ao Nan Lai,Peng Cheng Hu,Jing Wei Zheng,Shu-Feng Zhou,Lei Zhang
标识
DOI:10.1016/j.ijhydene.2019.07.134
摘要
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.
科研通智能强力驱动
Strongly Powered by AbleSci AI