【作者】 蔡晓生； 崔雨； 李久强； 彭静； 翟茂林；

【Author】 Xiaosheng Cai;Yu Cui;Jiuqiang Li;Jing Peng;Maolin Zhai;College of Chemistry and Molecular Engineering, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, Beijing National Laboratory for Molecular Sciences,Peking University;

【机构】 北京大学化学与分子工程学院放射化学与辐射化学重点学科实验室北京分子科学国家实验室；

【摘要】 氧化石墨烯表面富含有利于化学修饰的含氧官能团,因此可对其进行功能化修饰,改善氧化石墨烯的结构及性能。通过电离辐射技术对氧化石墨烯进行功能化改性可望赋予它们新的功能,进一步拓展它们的应用领域。我们以氧化石墨烯为基材,利用γ射线辐射引发甲基丙烯酸二甲氨基乙酯单体在其表面接枝聚合,并通过红外光谱、元素分析、热重分析、X射线光电子能谱等对接枝产物进行了表征。研究发现随着剂量增加,接枝率逐渐变大,当剂量为25kGy时接枝率达32%。改性后的氧化石墨烯能够很好地分散于多种有机溶剂(图1),提高了氧化石墨烯在有机溶剂中的分散性,可望在复合材料加工领域得到应用。更多还原

【Abstract】 Oxygen-containing functional groups are rich on the surface of graphene oxide(GO), which can be chemically modified to enhance the properties of GO. Ionizing radiation technique can be used for modification of graphene oxide, thus enlarging its applications. In our recent study, poly(2-(dimethylamino)ethyl methacrylate) is grafted onto graphene oxide sheets by γ-ray irradiation induced graft polymerization. The product is characterized by elemental analysis, FTIR, TGA and XPS. The grafting yield increases with the dose, reaching 32% at the dose of 25 kGy. The product can be dispersed in many organic solvents, showing the potential application in the area of composites processing.更多还原