▎ 摘　　要

Long chain n-alkanes had been employed as the matrix of solid-liquid composite phase change materials due to the high latent heat. In this paper, paraffin-based composite PCM were constructed. To obtain the effects of the ratio of epoxide and hydroxyl groups on functionalized graphene, Molecular dynamics simulation had been used to calculate several composite systems. According to the obtained results, the interfacial thermal resistance surprisedly decreased by 4 8.6 8% when the ratio of epoxide and hydroxyl groups was 0.5. And the order parameter in x and y-directions showed the correlation on the interfacial thermal resistance. In terms of the melting point, the composite systems containing the functionalized graphene had lower value in chosen contrasting systems. The present findings were expected to reveal some intriguing thermal behaviors of the graphene/paraffin composite phase change materials with different ratios of epoxide and hydroxyl groups. (c) 2021 Elsevier Ltd. All rights reserved.