Abstract：Graphene is an ideal reinforcement for various composites for its unique physical, chemical and mechanical properties. However, the problem of graphene dispersibility and poor wettability severely limits its further development in composites application. (RE-M-GO) were prepared by impregnation method and heating modifier method. The morphology and phase structure of RE-M-GO were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The changes of functional groups of modified graphene oxide were analyzed by means of Fourier transform infrared (FTIR), optical spectra (UV) and energy dispersive spectrometer (EDS),and the modification mechanism was also discussed. The results show that the dispersibility of rare earth modified graphene oxide is obviously improved due to the reaction of rare earth elements with the oxygen-containing functional groups of graphene oxide to form coordination bonds, resulting in a new functional group, which reduces the interfacial energy of graphene oxide and surface energy, thereby the dispersion of graphene oxide is improved.
 NOVOSELOV K S,GEIM A K,MOROZOV S V,et al.Electric field effect in atomically thin carbon films[J].Science,2004,306(5696):666-669.
 李勇,赵亚茹,李焕,等.石墨烯增强金属基复合材料的研究进展[J].材料导报,2016,30(6):71-76.LI Y,ZHAO Y R,LI H,et al.Research progress of metal matrix composites hybridized with graphene as reinforcement[J].Materials Review,2016,30(6):71-76.
 TJONG S C.Recent progress in the development and properties of novel metal matrix nanocomposites reinforced with carbon nanutubes and grapheme nanosheets[J].Materials Science and Engineering:Reports,2013,74(10):281-350.
 SUI H Y,ZHAO J C,TANG B,et al.Research progress of graphene-based composite materials[J].Journal of Shanghai University of Engineering Science,2011,25:252-257.
 任鹏刚.石墨烯及石墨烯基复合材料研究进展[J].中国印刷与包装研究,2012,4(3):1-9.REN P G.Research progress of grapheme and graphene-based nanocomposites[J].China Printing and Packaging Study,2012,4(3):1-9.
 吕生华,朱琳琳,李莹,等.氧化石墨烯复合材料的研究现状及进展[J].材料工程,2016,44(12):107-117.LYU S H,ZHU L L,LI Y,et al.Current situation and progress of graphene oxide composites[J].Journal of Materials Engineering,2016,44(12):107-117.
 张丹丹,战再吉.石墨烯/金属复合材料力学性能的研究进展[J].材料工程,2016,44(5):112-119.ZHANG D D,ZHAN Z J.Progress in research on mechanical properties of graphene/metal composites[J].Journal of Materials Engineering,2016,44(5):112-117.
 ZHANG Y Y,CHENG Y,PEI Q X,et al.Thermal conductivity of defective grapheme[J].Physics Letters A,2012,376:3668-3672.
 LI Z J,YANG B C,ZHANG S R,et al.Graphene oxide with improved electrical conductivity for supercapacitor electrodes[J].Applied Surface Science,2012,258(8):3726-3731.
 黄毅,陈永胜.石墨烯的功能化及其相关应用[J].中国科学B辑:化学,2009,39(9):887-896.HUANG Y,CHEN Y S.Functionlization of graphene and their application[J].Science in China Series B:Chemistry,2009,39(9):887-896.
 LOMEDA J R,DOYLE C D,KOSYNKIN D V,et al.Diazonium functionalization of surfactant-wrapped chemically converted graphene sheets[J].J Am Chem Soc,2008,130(48):16201-16206.
 WANG X,XING W Y,ZHANG P,et al.Covalent functionalization of graphene with organosilane and its use as a reinforcement in epoxy composites[J].Compos Sci Techn,2012,72(6):737-742.
 MAO A Q,ZHANG D H,JIN X,et al.Synthesis of graphene oxide sheets decorated by silver nanoparticles in organic phase and their catalytic activity[J].Journal of Physics and Chemistry of Solids,2012,73(8):982-986.
 江祖成,蔡汝秀,张华山.稀土元素分析化学[M].北京:科学出版社,2000:26-30.JIANG Z C,CAI R X,ZHANG H S.Rare earth elemental analytical chemistry[M].Beijing:Science Press,2000:26-30.
 JEONG H K,COLAKEROL L,JIN M H,et al.Unoccupied electronic states in graphite oxides[J].Chemical Physics Letters,2008,460(4/6):499-502.
 MBHELE Z H,SALEMANE M G,Van SITTERT C G C E,et al.Fabrication and characterization of silver-polyvinyl alcohol nanocomposites[J].Chem Mater,2003,15:5019-5024.
 黄振泉.稀土元素及其应用[J].材料科学与工程学报,1987(4):34-40.HUANG Z Q.Rare earth elements and its application[J].Journal of Materials Science and Engineering,1987(4):34-40.
 宋美慧,王春雨,武高辉.碳纤维增强镁基复合材料稀土表面改性研究[J].热处理技术与装备,2008,29(2):24-27.SONG M H,WANG C Y,WU G H.Investigation of improving corrosion resistance of C fibre reinforced magnesium matrix composites by permeating rare earths[J].Heat Treatment Technology and Equipment,2008,29(2):24-27.