利用纯天然绿茶提取物茶多酚（TP）对氧化石墨烯（GO）进行表面接枝修饰，制备了TP修饰的石墨烯（TPG），采用机械共混和热固化成型等方法制备了TPG/高分子复合材料。通过XRD、FT-IR、TGA和XPS对TPG进行结构及性能表征；利用万能材料试验机、场发射扫描电镜（SEM）、热重与热膨胀仪研究了复合材料的力学性能、拉伸断面形貌和热稳定性能。结果表明，TP分子成功地通过酚羟基接枝到GO表面的含氧官能团上，当TPG质量分数为1.0%时，TPG/环氧树脂复合材料的热分解温度提高了22.2℃；当TPG质量分数为0.5%时，TPG/环氧树脂复合材料的拉伸强度达到59.85 MPa，提高了13.5%；当TPG质量分数为1.0%时，羧基丁腈橡胶（XNBR）的玻璃化转变温度从-20.8℃上升到-16.5℃；当TPG质量分数为2.0%时，TPG/XNBR复合材料的拉伸强度从8.10 MPa提升到12.75 MPa，增加了57.4%。

Tea polyphenol (TP) extracted from pure natural green tea is used to carry out surface grafting of graphene oxide (GO),therefore TP-modified graphene (TPG) is prepared.TPG/polymer composite materials are prepared by mechanical blending and thermo-curing molding.The structure and performance of TPG are characterized by X-ray diffraction (XRD),infrared spectroscopy (FT-IR),thermal reanalysis (TGA) and X-ray photoelectron spectroscopy (XPS).The mechanical properties of TPG/polymer composites are tested by using a universal material tester.The stretching section profile of the composites is observed by means of field-launched scanning mirrors (SEM),and the thermal stability of the composites is studied via thermal weight and thermal expander.Results show that TP molecules are successfully connected to the oxygen-containing functional groups on the surface of GO through phenolic hydroxyl.Thermal decomposition temperature of TPG/epoxy composites increases by 22.2℃ when the adding amount of TPG is 1.0 wt%.The tensile strength of epoxy composites increases by 13.5% to 59.85 MPa when the adding amount of TPG is 0.5 wt%.Glass conversion temperature of carboxyl nitrile rubber (XNBR) increases from -20.8℃ to -16.5℃ when the adding amount of TPG is 1.0 wt%.The tensile strength of XNBR composites increases by 57.4% from 8.10 MPa to 12.75 MPa when the adding amount of TPG is 2.0 wt%.

任翔宇(1994-),男,硕士研究生,研究方向为炭基复合材料,731873740@qq.com