PEG/SiO₂-Al₂O₃ hybrid form-stable phase change materials with enhanced thermal conductivity

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• 作者：Bingtao Tang ; Cheng Wu ; Meige Qiu ; Xiwen Zhang ; Shufen Zhang
• 关键词：Composite material ; Sol&ndash ; gel growth ; Phase transition ; Thermal conductivity
• 刊名：Materials Chemistry and Physics
• 出版年：14 March, 2014
• 年：2014
• 卷：144
• 期：1-2
• 页码：162-167
• 全文大小：1357 K

文摘

The thermal conductivity of form-stable PEG/SiO₂ phase change material (PCM) was enhanced by in situ doping of Al₂O₃ using an ultrasound-assisted sol-gel method. Fourier transform infrared spectroscopy (FT-IR) was used to characterize the structure, and the crystal performance was characterized by the X-ray diffraction (XRD). Differential scanning calorimetry (DSC) and thermogravimetric analyzer (TGA) were used to determine the thermal properties. The phase change enthalpy of PEG/SiO₂-Al₂O₃ reached 124聽J聽g^鈭?, and thermal conductivity improved by 12.8% for 3.3聽wt% Al₂O₃ in the PCM compared with PEG/SiO₂. The hybrid PCM has excellent thermal stability and form-stable effects.