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首页> 外文期刊>RSC Advances >Constructing pendent imidazolium-based poly(phenylene oxide)s for anion exchange membranes using a click reaction
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Constructing pendent imidazolium-based poly(phenylene oxide)s for anion exchange membranes using a click reaction

机译：使用点击反应构建用于阴离子交换膜的悬垂咪唑基聚苯醚

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摘要

A series of poly(phenylene oxide)s (PPOs) bearing a flexible pendent imidazolium cation were prepared by an azide-alkyne cycloaddition between azidomethylated PPO and a novel alkyne-containing imidazolium, and their structures were confirmed by H-1 NMR, C-13 NMR, and FT-IR. The corresponding anion exchange membranes (AEMs) showed distinct hydrophobic/hydrophilic phase-separated morphology at higher imidazolium content, as evidenced by AFM and SAXS techniques, which favors for the construction of interconnected hydroxide transport channels. As a result, the as-prepared AEMs exhibited higher conductivity (95 mS cm(-1), 80 degrees C, 100% RH) than conventional imidazolium benzylic-type AEM (55 mS cm(-1), 80 degrees C, 100% RH) with even lower IEC. Furthermore, the introduction of a 1,2,3-triazole moiety into the polymer side chain does not compromise its thermal and alkaline stability. This investigation demonstrated that the "click chemistry" strategy will benefit further tailoring of high performance AEMs with "side-chain-type" architectures.
机译：通过叠氮基甲基化PPO与新型含炔基咪唑鎓之间的叠氮炔环加成反应，制备了一系列带有柔性悬垂咪唑阳离子的聚苯醚，并通过H-1 NMR，C- 13 NMR和FT-IR。相应的阴离子交换膜（AEMs）在较高的咪唑含量下显示出明显的疏水/亲水相分离形态，如AFM和SAXS技术所证明的那样，这有利于构建相互连接的氢氧化物传输通道。结果，与常规咪唑鎓苄基型AEM（55 mS cm（-1），80°C，100和100相比，所制备的AEMs具有更高的电导率（95 mS cm（-1），80摄氏度，100％RH）。 ％RH）甚至更低的IEC。此外，将1,2,3-三唑部分引入聚合物侧链中不会损害其热稳定性和碱性稳定性。这项研究表明，“点击化学”策略将有利于进一步定制具有“侧链型”架构的高性能AEM。

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