Thermal Sciences and Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio 45433-7750, United States.
ACS Appl Mater Interfaces. 2012 Feb;4(2):545-63. doi: 10.1021/am201496z. Epub 2012 Feb 1.
Thermal management in polymeric composite materials has become increasingly critical in the air-vehicle industry because of the increasing thermal load in small-scale composite devices extensively used in electronics and aerospace systems. The thermal transport phenomenon in these small-scale heterogeneous systems is essentially controlled by the interface thermal resistance because of the large surface-to-volume ratio. In this review article, several modeling strategies are discussed for different length scales, complemented by our experimental efforts to tailor the thermal transport properties of polymeric composite materials. Progress in the molecular modeling of thermal transport in thermosets is reviewed along with a discussion on the interface thermal resistance between functionalized carbon nanotube and epoxy resin systems. For the thermal transport in fiber-reinforced composites, various micromechanics-based analytical and numerical modeling schemes are reviewed in predicting the transverse thermal conductivity. Numerical schemes used to realize and scale the interface thermal resistance and the finite mean free path of the energy carrier in the mesoscale are discussed in the frame of the lattice Boltzmann-Peierls-Callaway equation. Finally, guided by modeling, complementary experimental efforts are discussed for exfoliated graphite and vertically aligned nanotubes based composites toward improving their effective thermal conductivity by tailoring interface thermal resistance.
聚合物基复合材料的热管理在航空领域变得越来越重要，因为在电子和航空航天系统中广泛使用的小型复合器件中的热负荷不断增加。由于大的表面积与体积比，这些小尺寸多相体系中的热传递现象主要由界面热阻控制。在这篇综述文章中，我们讨论了几种不同尺度的建模策略，并辅以我们在定制聚合物基复合材料热传输性能方面的实验努力。我们回顾了热固性材料中热传输的分子建模进展，并讨论了功能化碳纳米管和环氧树脂体系之间的界面热阻。对于纤维增强复合材料的热传输，我们综述了各种基于细观力学的分析和数值建模方法，以预测横向热导率。在晶格玻尔兹曼-皮尔尔斯-卡拉威方程的框架内，我们讨论了用于实现和缩放界面热阻以及在介观尺度上能量载体的有限平均自由程的数值方案。最后，根据建模，我们讨论了剥离石墨和垂直排列纳米管基复合材料的补充实验努力，通过调整界面热阻来提高其有效热导率。
