Two low eutectic mixtures of inorganic hydrated salt ternary phase change material(PCM) were prepared,then using porous expanded perlite to adsorb it by vacuum adsorption method.The thermal conductivity of the PCM was improved by graphene oxide(GO).The shape-stabilized PCM were prepared by encapsulation with HDPE.The samples were analyzed by SEM,IR,DSC and XRD.The effects of adsorption amount and GO content on the thermal properties of the PCM were studied.The results shown that when the adsorption capacity of PCM was 74.8% and 72.4%,the thermal properties of phase change perlite in the two systems were the best.The phase change temperatures were 30℃ and 49℃,and the phase change enthalpies were 82J/g and 134J/g.Under the optimal adsorption capacity,when the content of GO was 0.6%,the thermal properties of the PCM in the two systems were the best.Excellent,the phase transition temperature were 28℃ and 42℃,and the phase change enthalpies were 77J/g and 122J/g.
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