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首页> 美国卫生研究院文献>Polymers >Enhanced Hydroxide Conductivity and Dimensional Stability with Blended Membranes Containing Hyperbranched PAES/Linear PPO as Anion Exchange Membranes
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Enhanced Hydroxide Conductivity and Dimensional Stability with Blended Membranes Containing Hyperbranched PAES/Linear PPO as Anion Exchange Membranes

机译：用含有超支化的PAE /线性PPO的混合膜增强氢氧化物电导率和尺寸稳定性因为阴离子交换膜

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摘要

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.
机译：用超支化溴化聚（亚芳基醚砜）（BR-HB-PAE）和线性氯甲基化聚（苯基）（CM-PPO）制备一系列新型混合阴离子交换膜（AEM）。用不同重量比的Br-Hb-paes的制备的混合膜与CM-PPO不同，并且通过三乙胺进行离子官能团的季铵化反应。 Q-PAES / PPO-XY（季铵化-PAES / PPO-XY）混合膜促进离子通道形成，因为保持两种聚合物的强氢键，并具有优异的热行为，提高了氢氧化物导电性。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离子电导率（90.9ms CM-1），结果由形态支持的结果由AFM分析确定的膜。此外，刚性超抗原结构显示出抑制溶胀比为17.9-24.9％，尽管在90℃下的过量吸水量为33.2-50.3％，并且在1000小时内下显示出在2.0m KOH条件下的显着碱性稳定性。

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