The present work reports the preparation of a series of novel highly durable imidazolium-decorated anion exchange membranes (AEMs), with 3D network structure, via ultraviolet crosslinking reaction between 1-vinylimidazole and 1,6-hexanedithiol. AEM modified with trimethylamine (TMA) groups (no crosslinking, 45.7%) showed a significantly reduced water uptake within a range of 14.4–23.6% at 80 °C. Due to relatively good alkali-resistant of imidazolium groups and the compact structure stemmed from crosslinking network, the optimum cross-linked AEM (BPPO-Im 0.3) can retard the degradation and exhibits superior alkaline stability in 1.0 M NaOH at 60 °C for over 15 days, compared with TMA modified AEM. In ED application, BPPO-Im 0.3 AEM has a higher NaCl removal ratio of 77.82% than that of commercial AEM-Type II (74.13%) within 3 h experimental time. Accordingly, it shows higher current efficiency (67.43%) and lower energy consumption (1.94 kWh kg⁻¹ NaCl), compared to commercial one (62.83%; 2.05 kWh kg⁻¹). The facile fabrication process and the better-performance are suggestive of that BPPO-Im 0.3 is potentially applicable in ED.

本工作报道了通过1-乙烯基咪唑和1,6-己二硫醇之间的紫外线交联反应，制备了一系列新型的具有3D网络结构的高耐久性咪唑鎓修饰的阴离子交换膜（AEM）。用三甲胺（TMA）基团改性的AEM（无交联，占45.7％）在80°C范围内的吸水率在14.4-23.6％范围内显着降低。由于咪唑基团具有相对较好的耐碱性，并且由于交联网络而形成的致密结构，最佳的交联AEM（BPPO-Im 0.3）可以延缓降解，并在60°C的1.0 M NaOH中表现出优异的碱性稳定性与TMA修改的AEM相比，为15天。在ED应用中，BPPO-Im 0.3 AEM在3小时的实验时间内具有比商业AEM-Type II高的NaCl去除率（74.13％）77.82％。^-1 NaCl），而市售的则为（62.83％; 2.05 kWh kg ^-1）。简便的制造工艺和更好的性能表明BPPO-Im 0.3可能适用于ED。