Heat Transfer at the Interface of Graphene Nanoribbons with Different Relative Orientations and Gaps

Energies

Matteo Fasano¹  Shahin Mohammad Nejad¹  Rajat Srivastava¹  Masoud Bozorg Bigdeli² 

[1] Department of Energy, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;Department of Mechanical Engineering, University of Alberta, Edmonton, AB T6G 2G8, Canada;

关键词: heat transfer enhancement;    Kapitza resistance;    graphene;    polymer nanocomposites;    nanoribbon;    molecular dynamics;   

DOI  :  10.3390/en12050796

来源: DOAJ

【 摘 要 】

Because of their high thermal conductivity, graphene nanoribbons (GNRs) can be employed as fillers to enhance the thermal transfer properties of composite materials, such as polymer-based ones. However, when the filler loading is higher than the geometric percolation threshold, the interfacial thermal resistance between adjacent GNRs may significantly limit the overall thermal transfer through a network of fillers. In this article, reverse non-equilibrium molecular dynamics is used to investigate the impact of the relative orientation (i.e., horizontal and vertical overlap, interplanar spacing and angular displacement) of couples of GNRs on their interfacial thermal resistance. Based on the simulation results, we propose an empirical correlation between the thermal resistance at the interface of adjacent GNRs and their main geometrical parameters, namely the normalized projected overlap and average interplanar spacing. The reported correlation can be beneficial for speeding up bottom-up approaches to the multiscale analysis of the thermal properties of composite materials, particularly when thermally conductive fillers create percolating pathways.

【 授权许可】

Unknown