Cellulose–Silica Nanocomposite Aerogels by In Situ Formation of Silica in Cellulose Gel

Authors


  • This work was supported by the Japan Society for the Promotion of Science (JSPS) Foreign Researcher Fund of Japan, the National Basic Research Program of China (973 Program, 2010CB732203), the National Natural Science Foundation of China (20904043), and the Foundation of Key Laboratory of Cellulose and Lignocellulosic Chemistry, Chinese Academy of Sciences, China.

Abstract

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Light support: Regenerated cellulose gel prepared from an aqueous alkali–urea solution serves as scaffold/template for the in situ preparation of cellulose–silica composite aerogels (see picture) by a sol–gel process from organic silicates, and drying with supercritical CO2. The resulting composite aerogels have the mechanical strength and flexibility, large surface area, semi-transparency, and low thermal conductivity of the cellulose aerogels.

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