Study on properties and phase transformation mechanism of oil-based solid-solid phase change materials

被引:10
|
作者
Wu, Yakun [1 ,2 ,3 ]
Pan, Nana [1 ,2 ,3 ]
Li, Xinghui [1 ,2 ,3 ]
You, Zhenping [1 ,2 ,3 ]
Tang, Miao [1 ,2 ,3 ]
Dong, Yue [1 ,2 ,3 ]
Zhou, Xiaoyan [1 ,2 ,3 ]
Chen, Minzhi [1 ,2 ,3 ]
机构
[1] Nanjing Forestry Univ, Coll Mat Sci & Engn, 159 Longpan Rd, Nanjing 210037, Jiangsu, Peoples R China
[2] Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, Nanjing 210037, Peoples R China
[3] Nanjing Forestry Univ, Fast Growing Tree & Agrofibre Mat Engn Ctr, Nanjing 210037, Peoples R China
基金
中国国家自然科学基金;
关键词
Stearic acid; Solid-solid phase change materials; Iso-conversional kinetics; 2D FTIR; Phase change mechanism; ENERGY-STORAGE; INFRARED-SPECTROSCOPY; THERMAL-PROPERTIES; TRANSITION; CONVERSION; MOVEMENTS; KINETICS; BLENDS; SYSTEM; OXIDE;
D O I
10.1016/j.tca.2021.179109
中图分类号
O414.1 [热力学];
学科分类号
摘要
Polymeric solid-solid phase change materials (PSSPCMs) can essentially solve the leakage problem of physically composited solid-solid phase change materials, but the phase change enthalpies, which are usually far lower than the theoretical values, limit their applications. In this work, three PSSPCMs were prepared by co-esterification and polymerization with different amount of stearic acid (SA). The PSSPCMs suffered from lower crystallinities and activation energies at transition than pure SA, indicating that confinement of polymeric network on crystalline domains may lead to the decrease of enthalpy. According to analysis from generalized two-dimensional correlation Fourier transform infrared, the polymer network confinement in PSSPCMs mainly restricted the vibrations of nu asCH3, nu CH, and nu sCH3. In-depth understanding of the interaction between the crystalline chains and the polymeric networks would be beneficial for molecule design of novel PSSPCMs with high enthalpy.
引用
收藏
页数:10
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