化工学报2019，Vol.70Issue(1)：290-297,8.DOI:10.11949/j.issn.0438⁃1157.20180646
癸醇-棕榈酸/膨胀石墨低温复合相变材料的制备与性能
Preparation and properties of decyl alcohol-palmitic acid/expanded graphite low temperature composite phase change material
摘要
Abstract
To find a low temperature phase change material with a temperature range of 2—3℃, a sterol-palmitic acid (DA-PA) binary composite phase change material was prepared by eutectic method based on theoretical calculation. To improve the thermal conductivity, the DA-PA/EG composite phase change material with the optimal mass ratio of 15: 1 was obtained by using the porous characteristics of expanded graphite (EG). The structure and properties of the composite phase change material were studied by DSC, step cooling curve, FI-TR, SEM and high-low temperature cycle test. The results show that when the mass ratio of DA-PA was 97.8: 2.2, the phase change temperature was 2.9℃ and the latent heat was 203.6 J·g-1. After vacuum adsorption, DA-PA was uniformly encapsulated in the porous network structure of EG. The phase change temperature of DA-PA/EG was 2.7℃, the latent heat was 193.9 J·g-1, and the thermal conductivity was 1.416W·(m·K)-1, which was 4.3 times higher than DA-PA. After 100 times of high-low temperature cycles, the thermal properties of DA-PA/EG did not change much and still maintained good stability. The results show that the DA-PA/EG composite phase change material has great application value in the cold chain logistics.关键词
复合材料/相变/热传导/吸附/稳定性Key words
composites/phase change/heat conduction/adsorption/stability分类
能源科技引用本文复制引用
周孙希,章学来,刘升,陈启杨,徐笑锋,王迎辉..癸醇-棕榈酸/膨胀石墨低温复合相变材料的制备与性能[J].化工学报,2019,70(1):290-297,8.基金项目
国家重点研发课题(2018YFD0401305) （2018YFD0401305）
国家自然科学基金项目(51376115) （51376115）
上海市科委项目(16040501600) （16040501600）
