咪唑基离子液体非共价修饰的石墨烯结构与分散性  

Structure and Property of Imidazolium Ionic Liquids Modified Graphene

作　　者：吴力[1] 马文石[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广州510640

出　　处：《无机化学学报》2014年第8期1875-1882,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.51072059)资助项目

摘　　要：在离子液体氯化-1-烯丙基-3-甲基咪唑(AmimCl)存在的条件下,利用水合肼对氧化石墨烯进行同步还原,制备了一种可稳定分散在N,N-二甲基甲酰胺(DMF)和乙酸丁酯等有机溶剂中的离子液体改性石墨烯(IL-G)。运用红外光谱(FTIR)、紫外-可见吸收光谱(UV-Vis)、热失重分析(TGA)、原子力显微镜(AFM)、拉曼光谱(Raman)、X射线电子衍射(XRD)和X射线光电子能谱(XPS)对制备的改性石墨烯进行结构性能测试,结果表明离子液体AmimCl与石墨烯之间存在π-π和阳离子-π的相互作用,能较好的吸附在石墨烯表面。TGA测试表明IL-G中离子液体的比例约为7.20wt%。同时,AFM结果显示改性石墨烯剥离在DMF中的平均厚度是0.962 nm。由于非共价改性石墨烯可再分散于DMF和乙酸丁酯中,通过紫外可见吸收光谱测得其最大分散浓度分别是1.69 mg·mL-1和1.12 mg·mL-1。A non-covalently modified graphene was fabricated under the presence of 1-allyl-methylimidazolium chloride （AmimC1） ionic liquid by reduction of oxidized graphene with hydrazine hydrate. The structure and the property of modified and unmodified graphene were characterized by FTIR, XPS, UV-Vis, AFM, Raman spectroscopy and XRD. The prepared graphene can be dispersed homogeneously in dimethylformamide （DMF） and butyl acetate by ultrasonic treatment. The results reveal that the π-π and cation-π interactions exist between AmimCl ionic liquid and graphene, and appromixmately 7.20wt% AmimCL is attached to surface of graphene. Meanwhile, AFM result shows that modified graphene is exfoliated in DMF with an average thickness of 0.962 nm. The maximum dispersibility concentration of modified graphene in DMF and butyl acetate is 1.69 mg· mL^-1 and 1.12 mg· mL^-1 respectively.

关 键 词：离子液体 石墨烯 分散性 非共价键相互作用 

分 类 号：O611[理学—无机化学]