Abstract To improve the use efficiency and broaden the application fields of PCMs in solar thermal energy storage, the poly (ethylene glycol) (PEG) based polyurethane (PU) /wood powder (WP)/graphene oxide (GO) composite shape-stabilized phase change materials (SSPCMs) with high thermal conductivity were successfully designed and prepared by using PEG as the phase change working substance, WP and GO nanosheets as the supporting matrix, and the GO nanosheets as the thermally conductive filler simultaneously. Scanning electron microscopy (SEM) and X-ray photoemission spectrometer (XPS) reveal that the GO nanosheets were successful deposited on the WP surface via the simple impregnation process. With the increasing content of WP and GO, the thermal conductivity of PU/WP@GO SSPCMs was improved significantly. Meanwhile, the PU/WP@GO SSPCMs not only have excellent thermal properties, including good thermal storage properties, well thermal reliability and reusability and good thermal stability, but also exhibit reliable light-thermal conversion performance. Thus, the obtained novel PU/WP@GO SSPCMs with high thermal conductivity can improve the use efficiency of PCMs as solar light absorber and display a high potential application in the field of solar thermal energy storage.

中文翻译：

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通过加入低负载量的氧化石墨烯纳米片用于太阳能热能存储提高聚氨酯/木粉复合相变材料的导热性

摘要 为提高相变材料在太阳能热能存储中的使用效率并拓宽应用领域，聚乙二醇（PEG）基聚氨酯（PU）/木粉（WP）/氧化石墨烯（GO）复合形状稳定相以PEG为相变工作物质，WP和GO纳米片为支撑基体，GO纳米片同时作为导热填料，成功设计并制备了具有高导热性的变化材料（SSPCMs）。扫描电子显微镜 (SEM) 和 X 射线光电子能谱仪 (XPS) 表明，GO 纳米片通过简单的浸渍过程成功沉积在 WP 表面。随着WP和GO含量的增加，PU/WP@GO SSPCMs的热导率显着提高。同时，PU/WP@GO SSPCMs不仅具有优异的热性能，包括良好的蓄热性能、良好的热可靠性和可重复使用性以及良好的热稳定性，而且还表现出可靠的光热转换性能。因此，获得的新型高导热PU/WP@GO SSPCMs可以提高PCMs作为太阳能光吸收剂的使用效率，并在太阳能热能存储领域显示出巨大的应用潜力。