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Synthesis of high molecular weight chitosan from chitin by mechanochemistry and aging

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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.

Graphical abstract: Synthesis of high molecular weight chitosan from chitin by mechanochemistry and aging

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Publication details

The article was received on 12 Jul 2018, accepted on 26 Mar 2019 and first published on 26 Mar 2019


Article type: Paper
DOI: 10.1039/C9GC00304E
Citation: Green Chem., 2019, Advance Article

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    Synthesis of high molecular weight chitosan from chitin by mechanochemistry and aging

    T. Di Nardo, C. Hadad, A. Nguyen Van Nhien and A. Moores, Green Chem., 2019, Advance Article , DOI: 10.1039/C9GC00304E

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