Abstract Anion exchange membrane (AEM) as a positively-charged polymer allows the transition of anions, block the cations, and has been widely used in the electro-desalination processes. Permselectivity, alkaline stability, and electric ohmic resistance on the AEM are critical issues determining the final desalination efficiency in an electro-desalination process. Here in this work, the AEM with sound desalination and alkaline stable character was fabricated from the aspect of functional group optimization, i.e., introduce into the 2, 6-dimethyl-1, 4-phenylene oxide (PPO) polymer matrix as the alternative of the conventional. The 1-naphthol derivatives, i.e., 2-[dimethylaminomethyl] naphthalen-1-ol, and 2,7-bis[dimethylaminomethyl] naphthalen-1-ol as the functional groups provide conjugated π-electron, which may increase the alkaline stability of the anion exchange membranes (AEMs), and thus guarantee its long-term stability when operating the electro-desalination process over the limiting current density condition. The innovative membranes perform lower area resistance 0.5–2.27 Ω cm2 and well stability in the alkaline circumstance. In comparison to the commercial membranes (Neosepta AMX, standard grade), the obtained membrane presented comparable electro-desalination performance. The results indicate AEMs that functionalized by 1-naphthol derivatives can be a promising candidate for electro-desalination processes.

中文翻译：

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一种用于电脱盐的碱性稳定阴离子交换膜

摘要 阴离子交换膜（AEM）作为一种带正电荷的聚合物，可以实现阴离子的转移，阻断阳离子，在电脱盐过程中得到了广泛的应用。AEM 上的渗透选择性、碱性稳定性和电阻是决定电脱盐过程中最终脱盐效率的关键问题。在这项工作中，从官能团优化方面制备了具有良好脱盐和碱稳定特性的 AEM，即引入 2, 6-二甲基-1, 4-苯醚 (PPO) 聚合物基体作为替代传统的。1-萘酚衍生物，即2-[二甲氨基甲基]萘-1-醇和2,7-双[二甲氨基甲基]萘-1-醇作为官能团提供共轭π-电子，这可能会增加阴离子交换膜 (AEM) 的碱性稳定性，从而保证其在极限电流密度条件下操作电脱盐过程时的长期稳定性。创新的膜具有较低的面积电阻 0.5–2.27 Ω cm2，并且在碱性环境中具有良好的稳定性。与商业膜（Neosepta AMX，标准级）相比，所获得的膜具有可比的电脱盐性能。结果表明，由 1-萘酚衍生物功能化的 AEM 可以成为电脱盐工艺的有希望的候选者。27 Ω cm2，在碱性环境中具有良好的稳定性。与商业膜（Neosepta AMX，标准级）相比，所获得的膜具有可比的电脱盐性能。结果表明，由 1-萘酚衍生物功能化的 AEM 可以成为电脱盐工艺的有希望的候选者。27 Ω cm2，在碱性环境中具有良好的稳定性。与商业膜（Neosepta AMX，标准级）相比，所获得的膜具有可比的电脱盐性能。结果表明，由 1-萘酚衍生物功能化的 AEM 可以成为电脱盐工艺的有希望的候选者。