p-Methylstyrene groups were covalently grafted onto graphene oxide (GO) via esterification reactions and confirmed by Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and Thermogravimetric analysis (TGA). The as-prepared functionalized graphene oxide (FGO) exhibits good dispersibility in many organic solvents and monomer such as ethanol, dichloromethane and styrene. The high dispersibility and accessible reactive groups enable the preparation of reduced FGO (FrGO)/cross-linked polystyrene (PS) microsphere nanocomposites with improved thermal and anti-swelling properties. The thermal degradation temperature of the nanocomposites at 1.0 wt% addition increased by 27 °C, while the glass transition temperature improved by 8 °C; the swelling capacity in water and methanol decreased by 66% and 37%, respectively. Such enhanced properties could effectively improve the catalysis performance of nanocomposite-based ion-exchange resins (IERs). The IERs demonstrated high ethylene oxide (EO) conversion and monoethylene glycol (MEG) selectivity in the hydration of EO, even after a long run of 1800 h.

通过酯化反应将对甲基苯乙烯基团共价接枝到氧化石墨烯（GO）上，并通过傅立叶变换红外光谱（FTIR），X射线光电子能谱（XPS）和热重分析（TGA）进行确认。制备的官能化氧化石墨烯（FGO）在许多有机溶剂和单体（如乙醇，二氯甲烷和苯乙烯）中显示出良好的分散性。高分散性和可及的反应性基团能够制备具有改善的热和抗溶胀性能的还原FGO（FrGO）/交联聚苯乙烯（PS）微球纳米复合材料。纳米复合材料在添加1.0 wt％时的热降解温度提高了27°C，而玻璃化转变温度提高了8°C；水和甲醇的溶胀能力分别降低了66％和37％。这种增强的性能可以有效地改善基于纳米复合材料的离子交换树脂（IERs）的催化性能。IERs在EO的水合作用中表现出较高的环氧乙烷（EO）转化率和单乙二醇（MEG）选择性，即使经过1800小时的长时间运行也是如此。