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Advanced fabrication and multi-properties of aluminium hydroxide aerogels from aluminium wastes

A Correction to this article was published on 19 March 2021

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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/cm3), a high porosity (92.3–95.5%) and a low electrical conductivity ([1.8–5.2] × 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 °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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The authors would like to thank Temasek Laboratories @ NUS, R-265-000-682-720 (Mapletree Gift), R-265-000-682-114 (MOE Tier 1 FRC), R-265-000-682-133 (ODPRT) and R-265-000-682-731 (ME) for the financial support for the financial support.

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Correspondence to Hai M. Duong.

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Sp, T.S., Nguyen, P.T.T., Do, N.H.N. et al. Advanced fabrication and multi-properties of aluminium hydroxide aerogels from aluminium wastes. J Mater Cycles Waste Manag 23, 885–894 (2021).

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  • Aluminium hydroxide aerogel
  • Aluminium waste
  • Electrical conductivity
  • Thermal insulation