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Keywords:

  • gels;
  • nanocomposites;
  • nanoparticles;
  • polymers;
  • thermal conductivity
Thumbnail image of graphical abstract

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.