Ultralight and thermal insulation carbon foam/SiO2 aerogel composites

Abstract

In this study, carbon foam (CF) and SiO2 aerogel composite were prepared by the sol–gel method under a circumstance of the atmospheric drying process. The Pyrolysis mechanism of carbon foam was investigated through thermal gravimetric analysis and Fourier transform infrared spectroscopy (FTIR). Carbon foam having ultralight properties with a density of 5.44 kg/m3, functions as a skeleton to support the composite. The maximum compressive stress measured for CF/SiO2 aerogel composite was about 1.0 MPa. At room temperature, the measured thermal conductivities of the CF and CF/SiO2 aerogel composite were 0.035 W/m K and 0.024 W/m K, while at 300 °C, it was reported to be 0.120 W/m K and 0.057 W/m K. Aerogel filled in carbon foam cells have significantly reduced the gaseous thermal conductivity of the prepared composite.

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Acknowledgements

The present work was supported by the National Natural Science Foundation of China (Grant No. 51772151) and Jiangsu R&D project (Grant No. BE2017054). This work was also supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

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Correspondence to Zhaofeng Chen.

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Liu, Y., Chen, Z., Zhang, J. et al. Ultralight and thermal insulation carbon foam/SiO2 aerogel composites. J Porous Mater 26, 1305–1312 (2019). https://doi.org/10.1007/s10934-019-00732-y

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Keywords

  • Carbon foam
  • SiO2 aerogel
  • Composite
  • Thermal conductivity