气凝胶
材料科学
热分解
铝
保温
吸收(声学)
复合材料
制作
金属泡沫
热导率
多孔性
羧甲基纤维素
化学工程
冶金
有机化学
化学
医学
替代医学
图层(电子)
病理
工程类
钠
作者
Xue Yang Goh,Ren Hong Ong,Phuc Nguyen,Tianliang Bai,Dave Aw,Tian Li,Luon Tan Nguyen,Hai M. Duong
出处
期刊:Molecules
[MDPI AG]
日期:2023-03-17
卷期号:28 (6): 2727-2727
被引量:3
标识
DOI:10.3390/molecules28062727
摘要
Metal-based aerogels have attracted numerous studies due to their unique physical, structural, thermal, and chemical properties. Utilizing aluminum waste, a novel, facile, environmentally friendly approach to aluminum-based aerogels is proposed. In this work, the aluminum-based aerogels produced do not use toxic chemicals unlike conventional aerogel production. Aluminum powder, with poly(acrylic acid) and carboxymethyl cellulose as binders, is converted into aluminum-based aerogels using the freeze-drying method. The aluminum-based aerogels have low density (0.08-0.12 g/cm3) and high porosity (93.83-95.68%). The thermal conductivity of the aerogels obtained is very low (0.038-0.045 W/m·K), comparable to other types of aerogels and commercial heat insulation materials. Additionally, the aerogels can withstand temperatures up to 1000 °C with less than 40% decomposition. The aerogels exhibited promising oil absorption properties with their absorption capacity of 9.8 g/g and 0.784 g/cm3. The Young's modulus of the aerogels ranged from 70.6 kPa to 330.2 kPa. This study suggests that aluminum-based aerogels have potential in thermal insulation and oil absorption applications.
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