PBT/石墨烯微片复合材料的导热性能和力学性能

Thermal Conductivity and Mechanical Properties of PBT/GNPs Composites

采用拉曼光谱、透射电子显微镜、扫描电子显微镜对石墨烯微片的结构进行表征,研究了不同形貌的炭基材料(石墨烯微片、碳纤维、炭黑)对聚对苯二甲酸丁二醇脂(PBT)/石墨烯微片复合材料的导热性能及力学性能的影响。结果表明,相比于球形和棒状填料,添加片状填料石墨烯微片时,复合材料的渗滤阈值明显减小;并对此现象运用阈值模型理论进行拟合,发现经过修正后Y Agari模型与实验数据符合得很好;添加1%的石墨烯微片就可以使复合材料的冲击强度、拉伸强度、弯曲强度分别提高15%、9.6%、16%。

The structure of graphene nanosheets （GNPs） was studied using Raman spectroscopy, TEM, and SEM. The thermal conductivity and mechanical properties of polybutylene terephthalate （PBT） with different carbon fillers （GNPs, carbon fibers, carbon black） were compared. Compared with spherical and rod-like fillers, the sheet-shaped GNP resulted in a lower percolation threshold. It found that Y Agari model was in good agreement with the experimental data. Addition of 1% GNPs made the impact, tensile, and flexural strengths of the composites increased 15 G, 9.6 G, and 16 G, respectively.