The structural and thermal properties of chitin and chitosan isolated from different sources (Artemia sp.cysts (from the Aral Sea) and Silkworm pupae (Bombyx mori)) were studied by using FTIR, XRD, and DSC. It is shown, that the chitin and chitosan samples from different sources have a similar structure, however, depending on the sources differ in the ratio of the phase composition. Two types of crystalline modification of the structure (α-and β-modifications) are observed for chitin isolated from Artemia sp.cysts. The chitin isolated from Bombyx mori has three polymorphs (α-, β-and γ-modifications) with orthorhombic, monoclinic and triclinic syngonies. The thermal stability of chitin and chitosan samples was also depended on sources.
Abstract:The first time water solubility derivates of chitosan Bombyx mori was obtain. By FTIR method it was established the fact of formation of chitosan succinate. Influence of synthesis condition to structure of chitosan succinate was shown. It is revealed that, gel formation of chitosan succinate depend on the formation of both polyelectrolytic complex and covalent bonds.
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