TAO Liushi 1, ZHANG Shichao 1, GAO Nan 1, TAO Yinxiu 3, LI Na 2, SUN Xiankai 1, YAN Dachen 1, CHEN Yufeng 1
(1. Ceramic Research Institute, China Building Materials Academy, Beijing 100024, China; 2. China Building Material Test &
Certification Group Co., Ltd., Beijing 100024, China; 3. Tianjin Bohai Vocutional Technical College, Tianjin 300402, China)
Abstract: In this paper, the metal organic framework (IRMOF-3)chosen as carbon precursor and template was carbonized with NaCl at 1000°C to prepare porous carbon material with high specific surface area and large pore volume. Using stearic acid as the phase changing material for thermal energy storage and the porous carbon material as the support, the stearic acid/porous carbon composite phase changing material was obtained. The microstructure, phase composition and components of the porous carbon material were analyzed by scanning electron microscopy, X-ray diffraction, and energy dispersive spectrometer. Nitrogen adsorption-desorption curve and pore size distribution were observed to calculate the specific surface area and pore volume of the porous carbon material. The chemical and thermal properties of the composite material were analyzed by infrared spectroscopy and thermogravimetry. Finally, the latent heat of the composite phase changing material was investigated by differential scanning calorimetry. The thermal analysis results indicated that the material exhibited the same phase transition characteristics as the stearic acid, and no significant change of latent heat and leakage of the composite PCMs were observed after repeated cycling.
Key words: metal organic framework; composite phase changing material; latent heat