Polymer functionalized nanoparticles have attracted burgeoning interests in designing and fabricating novel nanocomposite membranes for fast transport of ions or small molecules. Herein, imidazolium polymer coated graphene oxides (AImGOs), bearing different length of polymer brushes, are synthesized via ATRP technique, and thus a very high weight percentage of imidazolium polymer brushes on GO (up to 89.5%) is acquired, corresponding to a high IEC value up to 65.5 mmol g⁻¹. The as-synthesized AImGOs are then dispersed into poly(vinyl alcohol) (PVA) to prepare nanocomposite membranes. The polymer brushes coated on AImGOs render better interfacial compatibility and filler dispersity. The large specific surface area and high aspect ratio of GO contributes to the enhancement of swelling resistance and mechanical stability of membranes. More importantly, the imidazolium polymer brushes on AImGOs endow the membrane with efficient OH^– conduction ability due to the high loading of OH^– hopping sites, the flexible chain, and the intrinsic large surface area of GO, demonstrating that efficient OH⁻-hopping pathways are constructed along the interface between PVA matrix and AImGO. By lengthening the polymer brushes, increasing AImGO content, and adopting appropriate types of imidazolium cations, a remarkable increment of OH^– conductivity are observed. To be noted, long polymer brushes quaternized with ethyl chloroformate yield zwitterion type functionality, entitling the highest OH^– conductivity of 31.6 mS cm⁻¹ at 30 °C (100% RH).

聚合物官能化的纳米颗粒在设计和制造用于离子或小分子快速传输的新型纳米复合膜方面引起了人们的浓厚兴趣。在此，通过ATRP技术合成了具有不同长度聚合物刷的咪唑聚合物涂层的石墨烯氧化物（AImGOs），因此在GO上获得了很高的咪唑聚合物刷重量百分比（高达89.5％），对应于高IEC值高达65.5 mmol g ^-1。然后将合成后的AImGOs分散到聚乙烯醇（PVA）中以制备纳米复合膜。涂在AImGO上的聚合物刷具有更好的界面相容性和填料分散性。GO的大的比表面积和高的长径比有助于增强膜的抗溶胀性和机械稳定性。更重要的是，上AImGOs咪唑鎓聚合物刷赋予有效的OH的膜^-传导能力由于OH的高负载^-跳频位点，柔性链，和GO的固有大的表面积，这表明有效的OH ^-跳跃路径是沿着PVA矩阵与AImGO之间的界面构建的。通过延长聚合物刷，增加AImGO内容，并采取适当的类型的咪唑阳离子，OH的一个显着的增量^-电导率得到遵守。值得注意的是，用氯甲酸乙酯季铵化的长聚合物刷产生两性离子型功能，在30°C（100％RH）时具有最高的OH ^–电导率31.6 mS cm ^-1。