Thermally conductive process and mechanism of TATB‐based polymer‐bonded explosives filled with graphene: Effects of interfacial thermal resistance and morphology/content of graphene

Abstract

The thermal conductivity of energy‐containing materials has a significant impact on their environmental suitability during manufacturing, transportation, and storage. In order to effectively regulate the thermal conductivity of polymer‐bonded explosives (PBXs), this study investigates the effects of different aspect ratios of graphene binder and interfacial thermal resistance on the thermal conductivity of TATB‐based PBXs using the finite element method. A model was constructed using Abaqus software to establish the constitutive relationship between graphene with varying aspect ratios and the thermal conductivity of PBXs. The results indicate that the effect of different graphene aspect ratios on the overall thermal conductivity of PBXs is small when the graphene content is lower than 3%. However, the thermal conductivity of PBXs increases nonlinearly with the increase in graphene aspect ratio when the graphene content is higher than 8%. Furthermore, the interfacial thermal resistance reduces the thermal conductivity of the PBX system by approximately 0.16 W/(m K), and its effect on the thermal conductivity of the system is relatively stable and does not change significantly with increasing graphene content and aspect ratio.Highlights Thermally conductive behavior of graphene‐filled PBX is revealed by simulation. The effects of content and aspect ratio of graphene are systematically investigated. The effect of interface thermal resistance is considered in the simulation.

Modeling thermal conductivity of polymer/carbon fiber composites prepared by SCFNA method

“…This is necessary to prevent heat accumulation and ensure a long service life. [1][2][3][4] Polymers have attracted increasing attention owing to their unique properties such as ease of processing, low weight, low cost, high chemical stability, and excellent mechanical properties [5][6][7] ; however, most polymers are thermal insulators, and their intrinsic TC is often <0.5 W/(mK). 8,9 To address this issue, various materials, such as metals (e.g., silver, 10 cupper 11 ), ceramic materials (e.g., boron nitride, [12][13][14] alumina, 15 alumina nitride 16 ), and carbonbased materials (e.g., carbon fiber (CF), [17][18][19][20] carbon nanotubes, 21,22 graphene, [23][24][25] graphite 26,27 ) have been incorporated into polymers to improve their TCs.…”