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Preparation and thermal cycling of expanded graphite/adipic acid composite phase change materials

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Abstract

Expanded graphite (EG)/adipic acid (AA) composite phase change materials were prepared in the paper. The structure and properties of composite were investigated by FTIR, DSC and FE-SEM. The results showed AA can be adsorbed into the structure of the expanded graphite. Meanwhile, they exhibited good compatibility. With the content of EG increased, the latent heat and thermal conductivity of the composites were decreased. When the content of EG is 10 mass%, the thermal conductivity of composites was 4.35 W m−1 K−1, which was obviously higher than pure adipic acid. The melting and freezing latent heats of AA were 220.2 and 220.5 J g−1, decreasing 16.1 and 13.7% after 1000 times thermal cycling. The results showed the composites had good thermal stability.

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Acknowledgements

This work was supported by the Science and Technology Support Program of Hubei Province (Grant Nos. 2014BAA134 and 2015BAA107) and the Fundamental Research Funds for the Central Universities (WUT:143201004).

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Correspondence to Weibing Zhou or Ruguang Li.

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Zhou, W., Li, K., Zhu, J. et al. Preparation and thermal cycling of expanded graphite/adipic acid composite phase change materials. J Therm Anal Calorim 129, 1639–1645 (2017). https://doi.org/10.1007/s10973-017-6385-2

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  • DOI: https://doi.org/10.1007/s10973-017-6385-2

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