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采用溶液技术制备出膨胀石墨增强环氧树脂复合材料。对石墨进行化学改性以提高与环氧树脂的相容性。采用XRD、FE-SEM和HR-TEM对环氧树脂/膨胀石墨复合材料进行表征。与环氧树脂相比,添加质量分数9%膨胀石墨后,该复合材料的热分解温度从340℃升高至480℃,抗张应力提高30%,导电率由10-15增加至10-5数量级。热学、力学和电学性能的显著提高,主要归因于膨胀石墨纳米片在环氧树脂基体中的良好分散性,从而可用于广泛的应用领域。
Expanded graphite reinforced epoxy resin composites were prepared by solution technology. Chemical modification of graphite to improve its compatibility with epoxy resins. The epoxy resin / expanded graphite composites were characterized by XRD, FE-SEM and HR-TEM. Compared with the epoxy resin, after the addition of 9% mass fraction of expanded graphite, the thermal decomposition temperature of the composite increased from 340 ℃ to 480 ℃, the tensile stress increased by 30% and the electrical conductivity increased from 10-15 to 10-5 Magnitude. The significant increase in thermal, mechanical and electrical properties is mainly due to the good dispersibility of the expanded graphite nanosheet in the epoxy matrix for a wide range of applications.