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首页> 外文期刊>Journal of Applied Polymer Science >Preparation of Anion Exchange Membrane Based on Homogeneous Quaternization of Bromomethylated Poly(arylene ether sulfone)
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Preparation of Anion Exchange Membrane Based on Homogeneous Quaternization of Bromomethylated Poly(arylene ether sulfone)

机译：基于溴甲基化聚亚芳基醚砜均相季铵化的阴离子交换膜的制备

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摘要

This article presented the synthetic and preparation route of quaternary ammonium functionalized anion exchange membranes (AEMs), which were derived from an engineering plastics polymer, poly(arylene ether sulfone) with 3,3',5,5'-tetramethyl-4,4'-dihydroxybipheny moiety (PAES-TM). The benzylmethyl groups on the main-chain of PAES-TM were converted to the bromomethyl groups via a radical reaction, thereby avoiding complicated chloromethylation, which required carcinogenic reagents. The chemical structure of the bromomethylated PAES was characterized by ~1H NMR spectrum. Following a homogeneous quaternization with trimethylamine in the solution, a series of flexible and tough membranes were obtained by a solution casting and anion exchange process. The ion exchange capacity values were ranging from 1.03 to 1.37 meq g~(-1). The properties of the membranes, including water uptake, hydroxide conductivity, and methanol permeability were evaluated in detail. The AEM showed a high conductivity above 10~(-2) S cm~(-1) at room temperature and extremely low methanol permeability of 4.16-4.94 × 10~(-8) cm~2 s~(-1). The high hydroxide conductivity of TMPAES-140-NOH could be attributed to the nano-scale phase-separated morphology in the membrane, which was confirmed by their transmission electron microscopy images.
机译：本文介绍了季铵盐官能化阴离子交换膜（AEMs）的合成和制备路线，该膜是由具有3,3'，5,5'-四甲基-4,4的工程塑料聚合物聚亚芳基醚砜制成的-二羟基联苯部分（PAES-TM）。 PAES-TM主链上的苄基甲基通过自由基反应转化为溴甲基，从而避免了复杂的氯甲基化，而这是需要致癌试剂的。溴甲基化PAES的化学结构通过〜1H NMR光谱表征。在溶液中用三甲胺进行均相季铵化后，通过溶液流延和阴离子交换过程获得了一系列柔软而坚韧的膜。离子交换容量为1.03〜1.37meq g·（-1）。详细评估了膜的性能，包括吸水率，氢氧化物电导率和甲醇渗透率。 AEM在室温下显示出高于10〜（-2）S cm〜（-1）的高电导率，并且甲醇渗透率极低，为4.16-4.94×10〜（-8）cm〜2 s〜（-1）。 TMPAES-140-NOH的高氢氧化物电导率可归因于膜中的纳米级相分离形态，这由其透射电子显微镜图像证实。

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