Preparation and Performance of a Phase Change Heat Storage Composite of Paraffin/Different Particle Sized Expanded Graphite

Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-18 Cooperative journals: 《材料研究学报》

田云峰 李珍 王洋 曾萍 姜凌艺

Abstract： As phase change heat storage material (PCM), composites of paraffin/expanded graphite of different particle sizes (DPS-EG) were prepared by melt blending method, which were then characterized by means of XRD, FT- IR, SEM, DSC and LFA. The effect of mass fraction of DPS-EG on performance of the composite PCM was studied. Results show that the thermal diffusivity of the composite PCM increased first and then decreased with the increasing mass fraction of small particle sized EG. When the ratio of mass fraction for large sized ones to the small ones of the DPS-EG was 9:1, paraffin may be allowed to fill fully into the free space of the mosaic structure of DPS-EG. The thermal diffusivity of the composite PCM was up to 1.964�10-6 m2/s, 22 times higher than that of pure paraffin, while its latent heat was 144.2 J/g.

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