Preparation and thermal properties of hybrid composites made of a phase change material and three-dimensional networked graphene

doi:10.12028/j.issn.2095-4239.2017.0070

Abstract

Abstract: Hybrid composites made of three-dimensional (3D) networked graphene and a phase change material (PCM) were synthesized by hydrothermal processing of graphene nanoplates (GNPs) and graphene oxide. Palmitic acid (PA) was used as the PCM. The composite PCM were prepared by vacuum impregnation. The effects of the type and content of GNPs on the thermal properties of the composite PCMs were investigated. The results showed that an increase in the content of GNPs increased the thermal conductivity of the composites PCMs. The type of GNPs had an influence on the thermal properties of the PCM composites The M-type of GNPs had the most significant effect on the thermal conductivity of the composite PCMs. No obvious changes to the latent heat and the phase change temperature were observed. When the content of GNPs was 8%, the thermal conductivity was 0.634 W/(m•K), which was almost a 3-fold increase compared with the PA. The heat transfer enhancement mechanisms were also discussed.

Key words: graphene, phase change material, thermal conductivity, thermal properties

WANG Ya, ZHANG Dong. Preparation and thermal properties of hybrid composites made of a phase change material and three-dimensional networked graphene[J]. Energy Storage Science and Technology, 2017, 6(4): 675-680.

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