石墨烯接枝9,10—二氢—9—氧杂—10—磷杂菲—10—氧化物(DOPO)的功能化合成

Preparation of functionalized graphene by grafting 9,10—dihydro—9—oxa—10—phosphaphenanthrene—10—oxide (DOPO) groups

利用有机分子对石墨烯进行修饰,提高其在溶剂中的分散性。选取含磷杂菲单体9,10—二氢—9—氧杂—10—磷杂菲—10—氧化物(DOPO)为修饰物,将氧化石墨烯用氯化亚砜处理后,使其碳层上的羧基被氯化形成酰氯基,利用DOPO中磷氢键(P—H)易断开的特性,与酰氯基发生反应,使得DOPO被修饰到石墨烯上。利用拉曼检测解释了反应前后碳层结构的变化,利用红外与X射线光电子能谱检测说明了反应产物与实验设计流程相一致,使用扫描电子显微镜观察了反应产物的表面形貌,反应产物在不同溶剂中的分散性实验结果表明其具有更好的分散稳定性。通过实验研究,获得了一种新型的功能化石墨烯,且与一般石墨烯相比在有机溶剂中具有更好的分散稳定性。

Graphene,which has a high specific surface area,tends to restack to form graphite through van der Waals interactions.Therefore,organic molecules are used to modify the graphene by covalent to improve the dispersion ability in solvent.Functionalized graphene,graphene-DOPO,was synthesized by grafting 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide （DOPO） to acylation graphene,using the active chemical bond,P-H.The Raman results explain the differences of carbon layer structure before and after the reaction.FTIR and XPS shows that the product is the same with the result of the experimental design.SEM gives the surface morphology information of graphene—DOPO.And graphene—DOPO shows a good dispersion in several organic solvent.In this study,a new type of functionalized graphene was synthesized by grafting DOPO,and the product has a sound dispersion ability in organic solvent.