Polyvinyl alcohol-based phase change aerogel used for safety, thermal-comfortable, and quiet buildings

Zhan Liu, Hongyang Li, Mingrui Sun, Changda Nie, Sijia Wang, Chengzhi Hu, Dawei Tang and Zhonghao Rao

Energy, 2025, vol. 323, issue C

Abstract: Building energy conservation is urgent to reduce energy consumption and enhance residential comfort. Thermal energy storage has served as a useful method in it. However, its traditional carriers of phase change materials are prone to leakage and flammability, thus being unsuitable in buildings. This study introduces phase change aerogels with integrated heat storage and flame-retardant. These aerogels were developed through a one-step synthesis method, and they combined the advantages of phase change materials and aerogels. It efficiently stores and releases heat within a minor temperature fluctuation while also providing flame suppression. To analyze the thermal properties of the resultant aerogels, their microstructures were examined, and their thermophysical properties were evaluated. Heat exchange experiments were conducted to test the thermal management performance. Results indicate that with the addition of aluminum hydroxide particles, the peak heat release rate of PVA/65OD-15 is significantly weakened by 46.2 % compared to PVA/65OD. Meanwhile, thermal conductivity is enhanced by 98.7 %, and the latent heat of PVA/65OD-15 reaches 134.6 J/g. When used in building thermal management, the temperature is significantly decreased by the PVA/65OD-15. This study offers innovative approaches for encapsulating phase change materials, demonstrating significant potential for safe and efficient building thermal management applications.

Keywords: Phase change material; Form stability; Flame retardancy; Porous aerogel; Building thermal management (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:323:y:2025:i:c:s0360544225014598

DOI: 10.1016/j.energy.2025.135817

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