One-step functionalization of graphene via Diels-Alder reaction for improvement of dispersibility  

作　　者：Jinxing ZHANG Kexing HU Qi OUYANG Qilin GUI Xiaonong CHEN 

机构地区：[1]Beiing Laboratory of Biomedical Materials,Beiing University of Chemical Technology,Beiing 100029,China

出　　处：《Frontiers of Materials Science》2020年第2期198-210,共13页材料学前沿（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.51573211)for financial support.

摘　　要：Good dispersibility of graphene in a medium or matrix is a critical issue in practical applications.In this work,graphene was functionalized using N-(4-hydroxyl phenyl)maleimide(4-HPM)via the Diels—Alder(DA)reaction by a one-step catalyst-free approach.The optimal reaction condition was found to be 90℃for 12 h using dimethytformamide(DMF)as the solvent.FTIR,Raman spectroscopy,XPS and EDS proved that 4-HPM moieties were successfully grafted onto the surface of graphene.UVvis and TGA confirmed that the grafting amount of 4-HPM was 3.75%-3.97%based on the mass of graphene.Functionalized graphene showed excellent dispersion stability when dispersed in common solvents such as ethanol,DMF,water,tetrahydrofuran and pxylene.Meanwhile,functionalized graphene also exhibited pH sensitivity in aqueous due to the phenolic hydroxyls from the 4-HPM moieties.As a result of good dispersion stability and pH sensitivity,compared with graphene,functionalized graphene had better adsorption capacity for methylene blue(MB)from aqueous solution.

关 键 词：GRAPHENE FUNCTIONALIZATION DISPERSIBILITY Diels-Alder reaction 

分 类 号：O62[理学—有机化学]