Research progress in thermally conductive composite films based on filled polymers

doi:10.19491/j.issn.1001-9278.2024.10.022

Abstract

Abstract:

With the rapid development and application of flexible electronic devices， traditional thermal management materials cannot meet a requirement of application for high thermal conductance， high toughness， and good mechanical adaptability. Thermally conductive flexible thin film materials with high a thermal conductivity exhibit great potential in thermal management applications for next⁃generation devices and therefore have attracted great attention by many researchers. At present， thermally conductive thin film materials have shown great application potential in smartphones， ultra⁃thin notebooks， flexible wearables， and smart home appliances. This paper introduced the classification of filled polymer⁃based thermal conductive composite films and their thermal conduction mechanisms from the aspects of the improvement in their thermal conductivity. The thermal conductivity of the composite films was improved by designing fillers to construct a low thermal resistance and high thermal conductivity path as well as a three⁃dimensional thermal conduction network. The research progress in the filled polymer⁃based thermal conductive composite films was also reviewed.

Key words: heat conduction, polymer?based thermally conductive film, packing design, build a three?dimensional network

CLC Number:

TQ324.8

TAN Jiani, XU Zhen, OUYANG Yuge. Research progress in thermally conductive composite films based on filled polymers[J]. China Plastics, 2024, 38(10): 127-133.

Figures/Tables 10

Fig.1. Schematic diagram of the theory of thermal conduction and heat conduction pathway［11］

Fig.2. Schematic diagram of percolation phenomenon［11］

Fig.3. SEM of the fractured cross⁃sections of PVA composites with different amounts of BN⁃PDA and photos illustrating the stretching of the BN⁃PDA/PVA composites［26］

Fig.4. Through⁃plane thermal conductivity and thermal diffusivity of the composites and finite element analysis of heat transfer in the composites［30］

Fig.5. The simulated temperature distributions of different composites［32］

Fig.6. Simulation of the temperature distribution of the PVA composite film surface and the effect of filler on the heat flux of the PVA composite film［36］

Fig.7. Scheme of the exfoliation of F⁃graphite and the preparation process F⁃graphene composite films［44］

Fig.8. Schematics of the route of composite preparation［38］

Fig.9. Schematic diagram of PVA/BNNS@AgNW composite preparation process and thermal conductivity path［44］

Fig.10. Schematic diagram of LbL assembly （NFC/RGO） hybrid film［46］

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