Thermal shock protection with scalable heat-absorbing aerogels

Feng Xiong, Jiawei Zhou, Yongkang Jin, Zitao Zhang, Mulin Qin, Haiwei Han, Zhenghui Shen, Shenghui Han, Xiaoye Geng, Kaihang Jia and Ruqiang Zou ()
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Feng Xiong: Peking University
Jiawei Zhou: Stanford University
Yongkang Jin: Peking University
Zitao Zhang: Peking University
Mulin Qin: Peking University
Haiwei Han: Peking University
Zhenghui Shen: Peking University
Shenghui Han: Peking University
Xiaoye Geng: Peking University
Kaihang Jia: Peking University
Ruqiang Zou: Peking University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Improving thermal insulation is vital for addressing thermal protection and energy efficiency challenges. Though silica aerogel has a record-low thermal conductivity at ambient pressure, its high production cost, due to its nanoscale porous structure, has hindered its widespread use. In this study, we introduce a cost-effective and mild method that enhances insulation by incorporating phase change materials (PCMs) into a micron-porous framework. With a thermal conductivity at 0.041 W m−1K−1 on par with conventional insulation materials, this PCMs aerogel presents additional advantages for thermal protection from transient high-temperature loads by effectively delaying heat propagation through heat absorption. Moreover, the PCMs aerogel remains stable under cyclic deformation and heating up to 300 °C and is self-extinguishing in the presence of fire. Our approach offers a promising alternative for affordable insulation materials with potential wide applications in thermal protection and energy conservation areas.

Date: 2024
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DOI: 10.1038/s41467-024-51530-3

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