Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 144, Issue 1-2, Pages 162-167Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2013.12.036
Keywords
Composite material; Sol-gel growth; Phase transition; Thermal conductivity
Categories
Funding
- National Natural Science Foundation of China [21276042]
- National Science and Technology Pillar Program [2013BAF08B06]
- Program for New Century Excellent Talents in University [NCET130080]
- Fundamental Research Funds for the Central Universities of China [DUT13LK35]
- Program for Liaoning Excellent Talents in University [LJQ2013006]
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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 124J g(-1), and thermal conductivity improved by 12.8% for 3.3 wt% Al2O3 in the PCM compared with PEG/SiO2. The hybrid PCM has excellent thermal stability and form-stable effects. Crown Copyright (C) 2014 Published by Elsevier B.V. All rights reserved.
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