Investigation of the heat transport in intersected graphene

BC Wang and W Shao and Q Cao and Z Cui, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 209, 124162 (2023).

DOI: 10.1016/j.ijheatmasstransfer.2023.124162

Graphene networks have great potential in improving the thermal transport of epoxy matrix composites. However, low heat transfer efficiency between adjacent graphene, especially the intersected structure with a small heat transfer area, limits its application. Here, the non-equilibrium molecular dynamics is used to investigate the thermal transport of the intersected graphene. The effects of nodal gap width, number and distribution of crosslinking bonds, and intersecting angle on the heat transfer coefficient are studied. The result shows that the coupling between intersected graphene is transformed from Van der Waals interactions to covalent interactions with a critical nodal gap width of 1.8 A. Then, crosslinking bonds are divided into independent crosslinking bonds and dependent crosslinking bonds according to whether the heat transfer of the crosslinking bond is affected by other bonds. Based on the thermoelec-tricity analogy theory, the nodal heat transfer coefficient is proportional to the number of independent crosslinking bonds, while the heat transfer efficiency of the dependent crosslinking bond is associated with numbers and distributions. Finally, the study on the intersecting angle shows that the heat transfer coefficient of intersected graphene increases with decreased angle under Van der Waals interactions. In contrast, the trend is opposite under covalent interactions. (c) 2023 Elsevier Ltd. All rights reserved.

Return to Publications page