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癸酸-棕榈酸/膨胀珍珠岩定型相变材料的制备与热性能
叶志林,魏婷,易红玲,赵媛媛,郑柏存
0
(华东理工大学体育新材料研发中心, 上海 200237)
摘要:
采用真空浸润法制备一种定型复合相变材料,其中癸酸(CA)和棕榈酸(PA)低共熔物为相变工作物质,膨胀珍珠岩(EP)为载体材料。通过FT-IR、SEM、DSC和TG等手段研究定型相变材料的化学稳定性、微观结构、热性能和热稳定性。结果表明:CA-PA合金通过物理结合被均匀地吸附在膨胀珍珠岩的孔道中。膨胀珍珠岩吸附CA-PA合金的最佳质量分数为55%,熔融潜热、凝固潜热分别为81.5、79.7 J/g,对应的熔融温度、凝固温度分别为27.9、19.1℃。冷热循环1 000次后,CA-PA/EP定型复合相变材料的热性能基本不变,具有很好的稳定性。
关键词:  癸酸-棕榈酸合金  膨胀珍珠岩  真空浸润法  相变材料
DOI:10.14135/j.cnki.1006-3080.2017.04.007
投稿时间:2016-10-28
基金项目:国家自然科学基金(21506064)
Preparation and Thermal Properties of Capric-Palmitic Acid/Expanded Perlite Shape-Stabilized Phase Change Materials
YE Zhi-lin,WEI Ting,YI Hong-ling,ZHAO Yuan-yuan,ZHENG Bai-cun
(Advanced Sports Material Research and Development Center, East China University of Science and Technology, Shanghai 200237, China)
Abstract:
Shape-stabilized phase change materials (PCMs) were prepared by incorporation of capric-palmitic acid (CA-PA) eutectic mixtures within the expanded perlite (EP) via vacuum impregnation.The chemical stability,microstructure,thermal properties and thermal stability of PCMs were characterized by Fourier transform infrared spectroscopy,scanning electron microscopy,differential scanning microscopy and thermogravimetry.The results indicated that CA-PA was impregnated into EP by physical attraction.The optimal mass fraction of CA-PA adsorbed on EP was 55%,and the latent heats of fusion and solidification were 81.5 J/g and 79.7 J/g,respectively,with the corresponding melting and solidification temperatures of 27.9℃ and 19.1℃.The thermal properties of PCMs kept almost unchanged after 1 000 melting-freezing cycles.
Key words:  capric-palmitic acid eutectic  expanded perlite  vacuum impregnation  phase change materials

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