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Akopova, Tatiana A; Demina, Tatiana S; Cherkaev, Georgii V; Khavpachev, Mukhamed A; Bardakova, Kseniya N; Grachev, Andrey V; Vladimirov, Leonid V; Zelenetskii, Alexander N; Timashev, Petr S
RSC advances, 07/2019, Letnik: 9, Številka: 36Journal Article
The solvent-free synthesis of allyl-substituted chitosan derivatives through reactive co-extrusion of chitosan powder with allyl bromide at shear deformation was performed. For the structural characterization, FTIR and NMR methods were employed. The results were confirmed by chemical analysis. The total content of allyl substituents from 5 to 50 per 100 chitosan units as a function of the component ratio in the reactive mixtures was revealed. Carrying out the reaction without any additives leads to the selective formation of N -alkylated derivatives, whereas in the presence of alkali the ethers of chitosan were preferentially formed. The results suggest that the proposed approach allows significantly higher yield of products to be obtained at high process speeds and significantly lower reagent consumption as compared with the liquid-phase synthesis in organic medium. The synthesized unsaturated derivatives are promising photosensitive components for use in laser stereolithography for fabrication of three-dimensional biocompatible structures with well-defined architectonics. The allyl chitosan derivatives are synthesized, characterized and evaluated as photosensitive components for creation of biomedical materials with well-defined architectonics.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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