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中文摘要：
采用癸酸、月桂酸和棕榈酸的三元共晶混合物作为相变材料,以膨胀石墨为基体,通过膨胀石墨多孔结构的毛细吸附和复合涂饰剂的包覆定形,将多元相变材料固定在膨胀石墨的孔道结构中,制备出结构稳定、密封性能优异、热稳定性好和高导热的新型三元脂肪酸/膨胀石墨复合定形相变材料.膨胀石墨具有膨胀疏松的多孔结构和良好的吸附性能;其熔融潜热为95.6 J/g,结晶焓为82.8 J/g,说明其具有很好的相变蓄热特性和热循环稳定性;材料的导热性能可增加至0.738 W/（m.K）,与脂肪酸相比得到大幅度提高.
英文摘要：
Fatty acid/expanded graphite composites as shape-stabilized phase change materials were prepared through infiltration method by the eutectic mixture of capric acid（CA）,lauric acid（LA） and palmitic acid（PA） as phase change materials,expanded graphite（EG） as skeleton,and the coating compound as membrane.N2 adsorption curve and SEM images of expanded graphite and the composites indicate that expanded graphite has a loose porous structure and the eutectic mixture is effectively absorbed into its porous structure.DSC thermograms and thermal performance test show that the composites possess good phase change behavior and thermal cycling stability.The thermal conductivity of the composite material is significantly improved[up to 0.738 W/（m·K）] due to the highly thermal conductive expanded graphite.
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