Aerogel conditioning of the chitosan makes it possible to prepare porous
solids of significant specific surface. The increase in the chitosan concentration or the
degree of acetylation decreases the specific surface of the synthesized chitosan gel.
Whereas drying with supercritical CO2
more effectively makes it possible to preserve
the volume of the spheres of gel and to have a more significant specific surface in
comparison with evaporative drying.