Thermal Insulation and Moisture Resistance of High‐Performance Silicon Aerogel Composite Foam Ceramic and Foam Glass

气凝胶 材料科学 复合材料 保温 复合数 陶瓷 超临界干燥 泡沫陶瓷 热导率 泡沫混凝土 水泥 图层(电子)
作者
Zihao Song,Yifan Zhao,Man Yuan,Longjin Huang,Meiyu Yuan,Sheng Cui
出处
期刊:Advanced Engineering Materials [Wiley]
卷期号:24 (8) 被引量:12
标识
DOI:10.1002/adem.202101508
摘要

With the globalization of green energy‐saving buildings, improving the thermal insulation performance of building exterior walls has become an important breakthrough in reducing building energy consumption. And the building envelope to improve insulation properties as a starting point for energy saving. Herein, a new type of material with excellent heat insulation and moisture resistance is developed. Hence, the sol–gel process, high‐pressure impregnation as well as supercritical drying are used to synthesize foam ceramic composite SiO 2 aerogel (FC@SA) and foam glass composite SiO 2 aerogel (FG@SA) materials. While maintaining the porous nanostructure of the aerogel, the aerogel is filled and embedded in the pores of the foamed material by a high‐pressure impregnation method. The thermal conductivity of FC@SA and FG@SA are, respectively, 0.04159 and 0.04424 W (m K) −1 at 25 °C, which are 36.02% and 23.72% lower than foam ceramic and foam glass. FC@SA reached water saturation (49%) in 48 h, while it took 72 h for FG@SA to reach water saturation (38%). Therefore, the composite building material prepared by embedding nano‐aerogel into ceramic foam and foam glass has great potential in the insulation material of building fence structures.
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