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Synthesis and properties of new side-chain-type poly(arylene ether sulfone)s containing tri-imidazole cations as anion-exchange membranes
International Journal of Hydrogen Energy ( IF 7.2 ) Pub Date : 2018-10-14 , DOI: 10.1016/j.ijhydene.2018.08.182
Chenyi Wang , Yuanpeng Zhou , Chang Xu , Xiaoyan Zhao , Jian Li , Qiang Ren

In order to enhance the properties of polymer anion-exchange membranes (AEMs), a class of side-chain-type poly (arylene ether sulfone)s containing tri-imidazole cations in pendant phenoxyphenyl spacer (i.e., Im-PES-xx) were designed and prepared by polymer grafting reaction. Based on these imidazole functionalized polymers, a series of new AEMs were successfully prepared by their solution coating and ion exchange. The obtained membranes exhibited good alkaline stability with the retention of ion-exchange capacity in the range of 78.5%–83.3% after immersion in 4 M NaOH solution at 80 °C for 336 h. The membranes also had high hydroxide conductivity with the values of 34.1–70.5 mS cm−1 at 80 °C. Meanwhile, these membranes possessed good dimensional stability, and their swelling ratio was in the range of 2.5%–7.0% at 80 °C. The incorporation of the dense and local imidazole cations in the side chains for AEMs plays an important role for their properties.



中文翻译:

含三咪唑阳离子作为阴离子交换膜的新型侧链型聚(亚芳基醚砜)的合成与性能

为了增强聚合物阴离子交换膜(AEM)的性能,对一类在侧苯氧苯基间隔基(即Im-PES-xx)中包含三咪唑阳离子的侧链型聚(亚芳基醚砜)进行了研究。通过聚合物接枝反应设计和制备。基于这些咪唑官能化的聚合物,通过溶液涂覆和离子交换成功制备了一系列新型AEM。将所得膜在80°C下浸入4 M NaOH溶液中336 h后,具有良好的碱性稳定性,离子交换能力保持在78.5%– 83.3%范围内。膜还具有较高的氢氧化物电导率,值为34.1–70.5 mS cm -1 在80°C下。同时,这些膜具有良好的尺寸稳定性,其在80°C时的溶胀率在2.5%–7.0%的范围内。AEM的侧链中稠密和局部咪唑阳离子的掺入对其性能起重要作用。

更新日期:2018-10-14
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