Abstract
This paper describes the preparation of ultralight flexible carbon foam (FCF) by direct carbonization of commercial melamine foam (MF). The effect of carbonization temperature on microstructure characteristics and thermal properties in FCF were evaluated. The thermal conductivity of the samples at ambient temperature was measured using the heat flow tester and the thermal conductivity of the samples at various temperatures was measured using water flow plate method. The pore distribution and microstructure morphology of the MF sample and FCF samples were also measured by mercury intrusion porosimetry and SEM imaging, respectively. The results show that the 3D network architecture and the triangle fiber shape of the MF precursor were inherited by the resulting FCF samples despite of a great reduction in volume. The average pore diameter of FCF samples reaches a lowest value for carbonization temperature of 850 °C. The thermal conductivity of FCF samples is considered to be affected by the porosity characteristic of FCF samples. The higher pore diameter of FCF samples, the greater its thermal conductivity.
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Acknowledgements
The authors would like to thank the project of the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), Primary Research & Development Plan of Jiangsu Province (BE2016104), Aeronautical Science Foundation of China (2016ZF52065), the National Key Research and Development Program of China (2016YFC0304302) and Funding of Jiangsu Innovation Program for Graduate Education (KYLX16_0343).
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Yu, S., Chen, Z., Wang, Y. et al. A study of thermal insulation properties and microstructure of ultra-light 3D-carbon foam via direct carbonization of polymer foam. J Porous Mater 25, 527–536 (2018). https://doi.org/10.1007/s10934-017-0465-3
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DOI: https://doi.org/10.1007/s10934-017-0465-3