期刊
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
卷 23, 期 3, 页码 885-894出版社
SPRINGER
DOI: 10.1007/s10163-020-01169-1
关键词
Aluminium hydroxide aerogel; Aluminium waste; Electrical conductivity; Thermal insulation
资金
- Temasek Laboratories @ NUS [R-265-000-682-720, R-265-000-682-114, R-265-000-682-133, R-265-000-682-731]
By converting aluminium metal waste into aluminium hydroxide aerogels, a new environmentally friendly material with low density, high porosity, and high thermal performance has been developed for high-value engineering applications.
Over 60 million tons of aluminium are produced annually, requiring sustainable and eco-friendly recycling methods of aluminium waste. In this work, aluminium metal waste is utilized in the fabrication of aluminium hydroxide aerogels using a cost-effective and environmental-friendly process. The developed aerogels with varying contents of aluminium and poly(vinyl alcohol) as a binder exhibit a low density (0.060-0.108 g/cm(3)), a high porosity (92.3-95.5%) and a low electrical conductivity ([1.8-5.2] x 10(-8) S/m). The results indicated that aluminium hydroxide aerogels have an ultra-low thermal conductivity of 0.028-0.032 W/m K and are able to withstand high temperature of 800 degrees C with less than 50% decomposition. It is suggested that the synthesized aerogels can be a promising candidate for high-value engineering applications such as thermal insulation of pipes and buildings to expand the usage of recycled aluminium.
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