Bio-aerogels are one of the classes of aerogel materials that exhibit open-porous nanofibrillar network. They are based on natural polymers such as polysaccharides or proteins. Bio-aerogels are produced by sol-gel synthesis via biopolymer dissolution followed by chain self-assembly and drying with supercritical carbon dioxide. No toxic compounds or processes are involved in bio-aerogel synthesis, and thus they are “humanfriendly” materials. In the frame of Nanohybrids project, alginate, cellulose, chitosan and their composite aerogels were prepared on a large scale as particles either by emulsion or Jet-Cutter techniques.
Properties and advantages
Bio-aerogels possess amazing properties such as high porosity (>90 %), very low density and high specific surface area (200-500 m2/g). Particle size can vary from few microns to few millimeters.
Bio-aerogels can be used as classical aerogels: for thermal insulation, in separation, adsorption and absorption and in catalysis. A strong advantage is that bio-aerogels can also be used in food and feed, in cosmetics and bio-medical and pharma applications as scaffolds, matrices for drug delivery, etc.
Download the fact sheet here:
NANOHYBRIDS-Bio-based Aerogels Fact Sheet