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Indexed by:会议论文

Date of Publication:2012-11-12

Included Journals:EI、Scopus

Volume:261-262

Page Number:22-27

Abstract:1-Octadecanol/SiO2 hybrid material, as a novel form-stable phase change material for thermal energy storage, was prepared via the sol-gel method. The crystallographic, phase-change, structural, and thermal stability properties of the samples were well characterized by X-Ray Powder Diffraction (XRD), Differential Scanning Calorimetry (DSC), Fourier transform infrared spectroscopy (FT-IR), and thermal gravimetry (TG). The results indicated that the 1-octadecanol/SiO2 hybrid material showed typical form-stable phase transition properties, e.g. suitable transition temperature (Tr=56.4   C), high transition enthalpy (  H  120.8 J/g) and good thermal stability. It is a functional hybrid material with good energy storage effect, and the heat storage mechanism of 1-octadecanol/SiO2 is the transfer between crystalline and amorphous states of the phase change component 1-octadecanol, and the silica serving as "cage-skeleton", restricted the molecular chain of the 1-octadecanol's free movement at high temperature. Thus, 1-octadecanol/SiO2 hybrid material can keep its solid state in the transition processing. ? (2013) Trans Tech Publications, Switzerland.