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选用十酸、十四酸和十八酸制备的三元低共熔物为相变材料,有机改性蒙脱土为支撑材料,熔融浸渗法制备了十酸-十四酸-十八酸/有机蒙脱土复合相变材料。采用DSC、FT-IR、TG、SEM、冷/热循环试验和蓄/放热试验等方法对其结构和热性能进行研究,结果表明,DSC测试复合材料的相变温度21.06℃,相变潜热102.26J/g;FT-IR表明相变材料和支撑材料的结合为物理吸附;TG曲线表明复合材料在低于130℃时热稳定性良好;SEM试验显示相变材料很好的分散在支撑材料层间;冷/热循环试验表明复合材料经历1000次冷/热循环后有较好的热稳定性;蓄/放热试验说明复合材料具有显著的蓄/放热能力,应用于建筑节能领域,可减小室内环境大幅度波动,满足人们对室内温度高舒适度的要求。
The ternary eutectic made from decahydrate, tetradecanoic acid, and octadecanoic acid is a phase change material, organically modified montmorillonite is a support material, and hexadecanoic-myristate-octadecanoic acid is prepared by melt infiltration method. / Organic montmorillonite composite phase change material. The DSC, FT-IR, TG, SEM, cold/heat cycle tests, and storage/exotherm tests were used to study the structure and thermal properties. The results showed that the phase transition temperature of the composites was 21.06°C and the latent heat of phase change was measured by DSC. 102.26J/g; FT-IR shows that the combination of phase change material and support material is physical adsorption; TG curve shows that the composite material has good thermal stability below 130°C; SEM test shows that the phase change material is well dispersed in the support material. Interlayer; cold/heat cycle tests show that the composite material has good thermal stability after being subjected to 1000 cold/hot cycles; the storage/exotherm test shows that the composite material has significant storage/discharge capacity and is used in the field of building energy conservation. The indoor environment can be greatly reduced to meet the people’s requirements for high comfort temperature.