Abstract In this work, the form-stable phase change material (PCM) was prepared by absorbing tetradecanol (TD) into expanded graphite (EG). Then, the obtained TD/EG was coated with graphene oxide (GO) through electrostatic self-assembly to prepare a novel composite PCM (TD/EG-GO). The morphology, phase change and thermal properties of TD/EG-GO were fully discussed. The DSC analysis shows that the TD/EG-GO composite melts at 35.2 °C with latent heat value of 189.5 J/g and freezes at 34.9 °C with latent heat value of 187.9 J/g. The thermal cycling test results reveal that the latent heat of TD/EG-GO composite decrease by less than 1% after 500 thermal cycles, indicating that the structure of GO-coated EG efficiently prevents the leakage of TD. The thermal stability and thermal conductivity of TD/EG-GO composite are also improved compared with that of uncoated TD/EG, demonstrating the multiple benefits of surface coating of GO.

中文翻译：

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氧化石墨烯包覆十四醇/膨胀石墨复合相变热储能材料的制备

摘要 在这项工作中，通过将十四烷醇（TD）吸收到膨胀石墨（EG）中来制备形状稳定的相变材料（PCM）。然后，获得的TD/EG通过静电自组装用氧化石墨烯（GO）包覆以制备新型复合PCM（TD/EG-GO）。充分讨论了TD/EG-GO的形貌、相变和热性能。DSC 分析表明，TD/EG-GO 复合材料在 35.2 °C 熔化，潜热值为 189.5 J/g，在 34.9 °C 冻结，潜热值为 187.9 J/g。热循环测试结果表明，经过500次热循环后，TD/EG-GO复合材料的潜热降低不到1%，表明GO包覆EG的结构有效地防止了TD的泄漏。