快速热扰动下 CNT-POLYMER 纳米复合材料中的纳米尺度热传导。

Nanoscale Heat Conduction in CNT-POLYMER Nanocomposites at Fast Thermal Perturbations.

机构信息

Prokhorov General Physics Institute of the Russian Academy of Sciences, GPI RAS, Vavilov str. 38, 119991 Moscow, Russia.

Institute of Physics and Competence Centre CALOR, University of Rostock, 18051 Rostock, Germany.

出版信息

Molecules. 2019 Jul 31;24(15):2794. doi: 10.3390/molecules24152794.

DOI:10.3390/molecules24152794

PMID:31370312

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6696361/

Abstract

Nanometer scale heat conduction in a polymer/carbon nanotube (CNT) composite under fast thermal perturbations is described by linear integrodifferential equations with dynamic heat capacity. The heat transfer problem for local fast thermal perturbations around CNT is considered. An analytical solution for the nonequilibrium thermal response of the polymer matrix around CNT under local pulse heating is obtained. The dynamics of the temperature distribution around CNT depends significantly on the CNT parameters and the thermal contact conductance of the polymer/CNT interface. The effect of dynamic heat capacity on the local overheating of the polymer matrix around CNT is considered. This local overheating can be enhanced by very fast (about 1 ns) components of the dynamic heat capacity of the polymer matrix. The results can be used to analyze the heat transfer process at the early stages of "shish-kebab" crystal structure formation in CNT/polymer composites.

摘要

聚合物/碳纳米管（CNT）复合材料中纳米尺度的热传导在快速热扰动下由具有动态热容的线性积分微分方程描述。考虑了局部快速热扰动下 CNT 周围的传热问题。获得了局部脉冲加热下 CNT 周围聚合物基体非平衡热响应的解析解。 CNT 周围温度分布的动力学显著取决于 CNT 参数和聚合物/CNT 界面的热接触电导。考虑了动态热容对 CNT 周围聚合物基体局部过热的影响。聚合物基体的动态热容的非常快（约 1 ns）分量可以增强这种局部过热。研究结果可用于分析 CNT/聚合物复合材料中“shish-kebab”晶体结构形成早期的传热过程。