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Synthesis of Highly Substituted Butyryl Chitin in the Presence of Perchloric Acid

Institute of Man-Made Fibres, Technical University of,ód, 90-924.,ód, wirki 36, Poland

Perchloric acid was used as a catalyst for butyrylation of krill chitin. Esterification was carried out under heterogeneous conditions using a large excess of butyric anhydride at 20°C and 40°C. The effect of catalyst concentration and duration of the reaction on molecular weight and yield of butyryl chitin was investigated. Butyryl chitin with a degree of substitution of 2 in 90% yield were obtained. These butyryl chitins were soluble in various organic solvents and formed strong transparent films and fibers. The butyryl chitin also shows good resistance to gamma irradiation.

Journal of Bioactive and Compatible Polymers, Vol. 11, No. 1, 61-71 (1996)
DOI: 10.1177/088391159601100105


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