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Chitosan: An Overview

Author:

Poonam Yeul and Seema Shrivastava

Subject Area:

Physical Sciences and Engineering

Abstract:

Chitosan is produced commercially by deacetylation of chitin, which is the structural element in the exoskeleton of crustaceans such as crabs and shrimp & cell walls of fungi. The degree of deacetylation (%DD) can be determined by NMR spectroscopy, and the %DD in commercial chitosans ranges from 60 to 100%. A common method for the synthesis of chitosan is the deacetylation of chitin using sodium hydroxide in excess as a reagent and water as a solvent. This reaction pathway, when allowed to go to completion yields up to 98% product. This review explores the Chitosan properties, modifications & applications.

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