Chitosan is a cationic polysaccharide prepared from
the deacetylation of chitin, the second most abundant
biopolymer. The natural resources for chitin include
shells of crustacean and shellfish, squid pen, and fungi
(Knorr, 1984). Chitin and chitosan are biodegradable
and biocompatible. As a consequence, extensive research
has been conducted to explore their potential applica-
tions in various industries.