Abstract In order to enhance the loading capacity of palygorskite (Pal) and further understand the relationship between pore size of carrier and thermal properties of mineral-based phase change materials (PCMs), series of three-dimensional palygorskite carriers and corresponding composite PCMs (CPCMs) were fabricated. The morphology, structural characteristics and thermal properties of the support and composite PCMs were determined by various techniques. The effects of support microstructure on the thermo physical properties of CPCMs were also discussed. The results revealed that the isocyanate functionalized palygorskite can be covalently bonded by dihydric alcohol to form three-dimensional Pal-based carrier. The pore diameter of the carrier varies with the chain length of dihydric alcohol. Since covalent bonding and surface functionalization can prevent the agglomeration of palygorskite crystals, thermal energy storage performance of stearic acid/three-dimensional palygorskite is increased by 67.4% to 100.7% within the scope of the study compared with that of stearic acid/palygorskite. The phase change temperature and latent heat of the composite phase change material have a linear correlation with pore size of support. This study is expected to be helpful for designing mineral-based porous carrier and providing guidance for optimizing CPCMs.

中文翻译：

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三维坡缕石基复合相变材料的热物理性能

摘要 为了提高坡缕石（Pal）的负载能力，进一步了解载体孔径与矿物基相变材料（PCMs）热性能之间的关系，一系列三维坡缕石载体及相应的复合相变材料（CPCMs） ) 是捏造的。载体和复合相变材料的形态、结构特征和热性能由各种技术确定。还讨论了载体微观结构对CPCMs热物理性能的影响。结果表明，异氰酸酯官能化坡缕石可以通过二元醇共价键合形成三维Pal基载体。载体的孔径随二元醇的链长而变化。由于共价键和表面功能化可以防止坡缕石晶体的团聚，在研究范围内，硬脂酸/立体坡缕石的蓄热性能比硬脂酸/坡缕石提高了67.4%～100.7%。复合相变材料的相变温度和潜热与载体孔径呈线性相关。该研究有望有助于设计矿物基多孔载体并为优化CPCMs提供指导。复合相变材料的相变温度和潜热与载体孔径呈线性相关。该研究有望有助于设计矿物基多孔载体并为优化CPCMs提供指导。复合相变材料的相变温度和潜热与载体孔径呈线性相关。该研究有望有助于设计矿物基多孔载体并为优化CPCMs提供指导。