Journal
MOLECULES
Volume 28, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/molecules28062727
Keywords
aluminum-based aerogel; aluminum foil; thermal insulation; thermal stability; oil absorption
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A novel and environmentally friendly approach to aluminum-based aerogels using aluminum waste is proposed. The aluminum-based aerogels produced have low density, high porosity, low thermal conductivity, high-temperature resistance, and good oil absorption properties. This study shows that aluminum-based aerogels have potential in thermal insulation and oil absorption applications.
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/cm(3)) and high porosity (93.83-95.68%). The thermal conductivity of the aerogels obtained is very low (0.038-0.045 W/m center dot K), comparable to other types of aerogels and commercial heat insulation materials. Additionally, the aerogels can withstand temperatures up to 1000 degrees 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/cm(3). 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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