It is a feasible way to use constructal filler to increase the effective thermal conductivity of polymer. However, the combined effect of filler constructal-shape, contact, anisotropy and interface thermal resistance on the effective thermal conductivity of the composites has not been considered, and the heat transfer mechanisms remain unclear. In this study, these effects are evaluated at the same time. The results show that the filler contact is a key factor in increasing the effective thermal conductivity of composite. The constructal fillers are easy to contact and form heat conduction network than common filler. The filler content of 5 % is the percolation threshold of constructal filler. It is lower than common filler and previous reports. The enhanced heat transfer performance of constructal filler is insensitive to directional angle and has no significant anisotropy. The composite with constructal filler has high effective thermal conductivity in different directions. Series numerical models are proposed to predict the effective thermal conductivity of composite. These models have high accuracy and reliability, the deviations with experiment results is in an acceptable range. The interface thermal resistance should be considered in predicting the effective thermal conductivity of composite with nano-fillers.

使用结构填料来增加聚合物的有效导热率是一种可行的方法。然而，尚未考虑填料的结构形状，接触，各向异性和界面热阻对复合材料有效导热率的综合影响，并且传热机理仍不清楚。在这项研究中，同时评估了这些影响。结果表明，填料接触是提高复合材料有效导热系数的关键因素。与普通填料相比，结构填料更易于接触并形成热传导网络。5％的填料含量是建筑填料的渗透阈值。它低于常见的填充器和以前的报告。结构填料的增强的传热性能对方向角不敏感，并且没有明显的各向异性。具有结构填料的复合物在不同方向上具有高的有效导热率。提出了系列数值模型来预测复合材料的有效导热系数。这些模型具有较高的准确性和可靠性，与实验结果的偏差在可接受的范围内。在预测具有纳米填料的复合材料的有效导热率时，应考虑界面热阻。与实验结果的偏差在可接受的范围内。在预测具有纳米填料的复合材料的有效导热率时，应考虑界面热阻。与实验结果的偏差在可接受的范围内。在预测具有纳米填料的复合材料的有效导热率时，应考虑界面热阻。