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Synthesis of high molecular weight chitosan from chitin by mechanochemistry and aging
Abstract : Chitosan can be obtained from the deacetylation of chitin. This process is however difficult and usually accompanied by depolymerization, affording low molecular weight chitosan. We report a novel path, relying on the combination of mechanochemistry and aging, to yield high molecular weight chitosan with minimal use of energy and solvent. This method is versatile and applicable to a number of chitin sources, including crude crustacean and insect shells, yielding deacetylation up to 98% and remarkably high molecular weights. Chitin deacetylation was studied by magic angle spinning nuclear magnetic resonance and molecular weight was estimated by viscometry. This process affords chitosan in a safer fashion and with less materials and energy usage compared to the classic hydrothermal one.
https://hal-u-picardie.archives-ouvertes.fr/hal-03613127
Contributeur : Louise Dessaivre Connectez-vous pour contacter le contributeur
Soumis le : vendredi 18 mars 2022 - 11:30:52
Dernière modification le : samedi 19 mars 2022 - 03:39:49
Contributeur : Louise Dessaivre Connectez-vous pour contacter le contributeur
Soumis le : vendredi 18 mars 2022 - 11:30:52
Dernière modification le : samedi 19 mars 2022 - 03:39:49
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