Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 216, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2020.110678
Keywords
Shape stability; Composite phase change materials; Thermal enthalpy; Semi-IPN
Funding
- National Natural Science Foundation of China [21576039, 21536002, 21421005, 21276042, U1608223]
- Program for Innovative Research Team in University [IRT-13R06]
- Fundamental Research Funds for the Central Universities [DUT18ZD218]
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Polyethylene glycol (PEG)/poly Acrylic acid (PAA)/silica (SiO2) composite phase change materials (PCMs) with strong shape stability were successfully synthesized by a simultaneous sol-gel reaction, and in situ free radical polymerization. The network structure, shape stability, phase change enthalpy, and thermostability of the prepared materials were characterized through FT-IR, DSC, TGA, and XRD. The synthesized PEG/PAA/SiO2 composite PCMs with a semi-interpenetrating network (semi-IPN) exhibited a high phase change enthalpy of 172.9 J/g and strong shape stability under 355 degrees C. The interaction between PEG and PAA/SiO2 network was also discussed in this paper, as well as the relationship between the interaction, energy density, and shape stability. The prepared PEG/PAA/SiO2 composite PCMs provided a novel method in preparing shape stable phase change materials.
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