【摘要】 以氧化石墨烯（GO）为载体,醋酸锌为锌源,采用溶胶-凝胶法成功制备了氧化锌@石墨烯（ZnO@rGO）复合填料并利用傅里叶变换红外光谱（FTIR）、拉曼光谱仪（Raman）、扫描电子显微镜（SEM）对复合填料的结构及微观形貌进行表征。然后以ZnO@rGO作为导热填料,制备了系列环氧树脂（ZnO@rGO/EP）导热绝缘复合材料,研究了填料含量对复合材料性能的影响。结果表明,复合填料能较均匀地分散于环氧树脂基体中,随填量的增加,ZnO@rGO（O₂）/EP复合材料的热导率不断增加,冲击强度先提高后降低。当添加22.04%（体积分数）的ZnO@rGO（O₂）填料时,复合材料的热导率达到0.58 W/（m·K）,与纯环氧树脂材料相比提高了205.3%,而冲击强度由纯环氧树脂的15.9 kJ/m²提高到25.0 kJ/m²且该复合材料仍保持良好绝缘性能。更多还原

【Abstract】 ZnO@rGO hybrid filler is fabricated by liquid phase method with graphene oxide（GO） as the carrier and zinc acetate as zinc source. The structure and morphology of the hybrid filler are characterized by Fourier transform infrared spectroscopy（FTIR）, Raman spectrometer（Raman） and scanning electron microscopy（SEM）. A series of epoxy resins（ZnO@rGO/EP） thermally conductive insulating composites are prepared by adding ZnO@rGO hybrid filler. The influence of filler content on the properties of the thermally conductive insulating composites is studied. The results show that the hybrid filler could be dispersed evenly in epoxy resin. With the increasing of filler content, the thermal conductivity of ZnO@rGO（O₂）/EP composites increases continuously, and the impact strength first increases and then decreases. When 22.04 vol.% ZnO@rGO（O₂） is added, the thermal conductivity of the composite material reaches 0.58 W/（m·K）, which is 205.3% higher than that of pure epoxy resin, and the impact strength increases from 15.9 kJ/m² for the pure epoxy resin to 25.0 kJ/m². Meanwhile, the composite material still maintains good insulation properties.更多还原