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本文详细阐述了石墨烯和球形纳米颗粒间提高复合物热导率的协同效应。石墨烯和纳米颗粒在复合物中可形成紧密堆积结构,该结构阻止了石墨烯的团聚。二维的石墨烯能够在纳米颗粒之间架桥,为复合体系提供了更加有效的声子传输通道,降低了界面热阻。当石墨烯添加量为质量分数1.0%时,导热硅脂的热导率达到了3.45 W/(m·K),EVA复合材料的热导率达到了2.41 W/(m·K);在PC/ABS基体中,石墨烯添加质量分数0.5%时,热导率达到3.11 W/(m·K);在环氧树脂基体中,当负载银的石墨烯填充量为质量分数5.0%时,热导率到达了0.95 W/(m·K)。
This article details the synergistic effect of increasing the thermal conductivity of the composite between graphene and spherical nanoparticles. Graphene and nanoparticles can form a tightly packed structure in the composite, which prevents the grafting of the graphene. Two-dimensional graphene bridge between the nanoparticles, the composite system provides a more effective phonon transmission channel, reducing the interface thermal resistance. The thermal conductivity of the thermal grease reached 3.45 W / (m · K) when the additive of graphene was 1.0%. The thermal conductivity of the EVA composite reached 2.41 W / (m · K) / ABS matrix, the thermal conductivity reaches 3.11 W / (m · K) when the graphene is added 0.5% by mass. In the epoxy resin matrix, when the loading of silver-loaded graphene is 5.0% Conductivity reached 0.95 W / (m · K).