亲油性长链烷基硅烷功能化石墨烯的制备与表征  

Preparation and characterization of organophilic long-chain alkyl silane functionalized graphene

作　　者：马文石[1] 李吉[1] 林晓丹[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《功能材料》2012年第20期2807-2811,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51072059);广东省科技计划资助项目(2010A080802003;2010A090200035;2011A081301018)

摘　　要：用十六烷基三甲氧基硅烷在三乙胺存在下处理氧化石墨烯(GO),一步制得长链烷基硅烷功能化石墨烯(FG)。运用傅里叶变换红外光谱(FT-IR)、X射线光电子能谱(XPS)、X射线衍射(XRD)、原子力显微镜(AFM)和紫外-可见吸收光谱(UV-Vis)等技术对FG的结构与性能进行了测试表征。分析结果表明十六烷基三甲氧基硅烷中的Si—OCH3与GO表面上的OH反应,以Si—O—C连接在石墨烯片层的表面,而GO片层上其它含氧基团大部分被还原脱除,恢复了石墨烯的sp2杂化结构。FG具有很好的油溶性,可稳定分散于N,N-二甲基甲酰胺(DMF)、四氢呋喃、丙酮、苯等有机溶剂中,并且在DMF中的最大分散浓度为1.90mg/mL。AFM的结果显示,FG在DMF中平均厚度约为1.7nm,以单层剥离状态存在。Functionalized graphene （FG） was prepared in one-step by treating graphene oxide （GO） with hexa-decyltrimethoxysilane and triethylamine. Fourier transform infrared （FT-IR） spectroscopy, X-ray photoelec- tron spectroscopy （XPS）, X-ray diffraction （XRD）, atomic force microscopy （AFM） and ultraviolet-visible （UV-Vis） spectroscopy were performed to characterize the structure and properties of FG. Investigation results confirmed that the silane molecules were attached on the surface of GO by Si--O--C, meanwhile the residual oxygen-containing functional groups of GO were removed and the sp2-hybridized structure of graphene was re- stored. FG had an excellent lipophilicity and could be stably dispersed in various solvents such as N, N-dimeth- ylformamide （DMF）, tetrahydrofurane, acetone and toluene. The maximum dispersibility of FG in DMF was 1.90mg/mL. AFM showed that FG was exfoliated into single sheets in DMF with a thickness of about 1.7nm.

关 键 词：十六烷基三甲氧基硅烷 三乙胺 氧化石墨烯 石墨烯 功能化石墨烯 

分 类 号：O641[理学—物理化学]