1-Octadecanol/SiO₂ Hybrid Form-Stable Phase Change Materials for Thermal Energy Storage

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 (ΔH≥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.

• Periodical: Applied Mechanics and Materials (Volumes 260-261)
• Pages: 22-27
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.260-261.22
• Online since: December 2012
• Authors: Bing Tao Tang, Xi Xi Zheng, Mei Ge Qiu, Chao Jia, Shu Fen Zhang
• Keywords: 1-Octadecanol/SiO₂ Hybrid Material, Form Stable Phase Change Material (FSPCM), Sol-Gel Method

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