Enhanced Hydroxide Conductivity and Dimensional Stability with Blended Membranes Containing Hyperbranched PAES/Linear PPO as Anion Exchange Membranes.
Enhanced Hydroxide Conductivity and Dimensional Stability with Blended Membranes Containing Hyperbranched PAES/Linear PPO as Anion Exchange Membranes.
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DOI：
10.3390/polym12123011
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发表时间：
2020-12-16
期刊：
影响因子：
5
通讯作者：
Yoo DJ
中科院分区：
文献类型：
--
作者：
Kim SH;Lee KH;Chu JY;Kim AR;Yoo DJ
以超支化溴化聚芳醚砜（Br-HB-PAES）和线性氯甲基化聚苯醚（CM-PPO）为原料，制备了一系列新型共混阴离子交换膜。以Br-HB-PAES和CM-PPO为原料，通过三乙胺季铵化反应引入离子官能团，制备了不同配比的Br-HB-PAES/CM-PPO共混膜。Q-PAES/PPO-XY（季铵化PAES/PPO-XY）共混膜由于保持了两种聚合物之间的强氢键而促进了离子通道的形成，并显示出改善的氢氧化物电导率和优异的热行为。特别地，与原始Q-HB-PAES膜（32.8mS cm-1）相比，Q-PAES/PPO-55膜显示出非常高的氢氧根离子电导率（90.9mS cm-1），这一结果得到了AFM分析所确定的膜形态的支持。此外，刚性超支化结构显示出17.9-24.9%的抑制溶胀比，尽管在90 °C下过量吸水为33.2-50.3%，并且在2.0M KOH条件下超过1000小时显示出显著的碱性稳定性。
A series of novel blended anion exchange membranes (AEMs) were prepared with hyperbranched brominated poly(arylene ether sulfone) (Br-HB-PAES) and linear chloromethylated poly(phenylene oxide) (CM-PPO). The as-prepared blended membranes were fabricated with different weight ratios of Br-HB-PAES to CM-PPO, and the quaternization reaction for introducing the ionic functional group was performed by triethylamine. The Q-PAES/PPO-XY (quaternized-PAES/PPO-XY) blended membranes promoted the ion channel formation as the strong hydrogen bonds interconnecting the two polymers were maintained, and showed an improved hydroxide conductivity with excellent thermal behavior. In particular, the Q-PAES/PPO-55 membrane showed a very high hydroxide ion conductivity (90.9 mS cm−1) compared to the pristine Q-HB-PAES membrane (32.8 mS cm−1), a result supported by the morphology of the membrane as determined by the AFM analysis. In addition, the rigid hyperbranched structure showed a suppressed swelling ratio of 17.9–24.9% despite an excessive water uptake of 33.2–50.3% at 90 °C, and demonstrated a remarkable alkaline stability under 2.0 M KOH conditions over 1000 h.
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影响因子：
4.6
作者：
Becerra-Arciniegas, R-A;Narducci, R.;Di Vona, M. L.
通讯作者：
Di Vona, M. L.
影响因子：
8.4
作者：
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通讯作者：
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影响因子：
9.5
作者：
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通讯作者：
Yoo, Dong Jin
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影响因子：
9.5
作者：
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通讯作者：
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影响因子：
15
作者：
Chen, Chen;Tse, Ying-Lung Steve;Voth, Gregory A.
通讯作者：
Voth, Gregory A.