Abstract
In this paper, the modified h-BN coating was coated on the prepreg sheets; then, the carbon fiber/epoxy composite laminates were prepared by compression molding. The through-thickness thermal conductivity, mechanical and thermomechanical properties of the laminates were studied, respectively. The results show that h-BN particles, which are flaky shape with a diameter of about 0.6 μm and thickness of about 70 nm, have been evenly incorporated into the composites, and the thermal stability, through-thickness thermal conductivity, impact strength and glass transition temperature (Tg) of the composites are improved accordingly. When the BN content is 10 m%, the initial thermal degradation temperature (Tinitial) of the prepreg is 370 ℃, which is 10 ℃ higher than that of unmodified prepreg. When the BN content is 7 m%, the thermal conductivity of the laminates reaches 0.9 and 1.0 W·m−1·K−1 at 25 and 100 ℃, respectively, which are 114% and 111% higher than that of pure laminate. When the content of BN is 5 m%, the impact strength of the laminate reaches the highest value of 225 kJ·m−2, which is 15.4% higher than that of pure laminate. BN particles form a dense heat conduction network, thus delaying the thermal degradation of the resin and improving the thermal conductivity. This study provides a facile path to fabricate composite laminates with the integrated structure and function.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (51872174), the Natural Science Foundation of Shandong Province (ZR2020QE075), the Shandong Province key research and development projects (2019JMRH0213) and the Zibo City & School Integrated Development Plan Project (2018ZBXC005).
Funding
This work was funded by the National Natural Science Foundation of China (51872174), the Natural Science Foundation of Shandong Province (ZR2020QE075), the Shandong Province key research and development projects (2019JMRH0213) and the Zibo City & School Integrated Development Plan Project (2018ZBXC005).
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by CZ, GG, SD, CW, ZL and HT. The first draft of the manuscript was written by CZ and SD, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Zhang, C., Gu, G., Dong, S. et al. Thermal conductivity, mechanical properties and thermomechanical analysis of fiber composite laminates with BN coating. J Therm Anal Calorim 147, 8019–8031 (2022). https://doi.org/10.1007/s10973-021-11066-w
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DOI: https://doi.org/10.1007/s10973-021-11066-w