Étude des activités antioxydantes d'un polymère extrait et son dérivé

Abstract

Chitosan is a naturally occurring biodegradable polymer obtained by the deacetylation of chitin, which is found in the exoskeleton of crustaceans. To promote the use of chitosan from crustacean exoskeletons (shrimps, crabs, etc.) in various applications, in the present study, grey shrimp crustaceans were used to extract chitosan. The experiments focused on the effects of the interactions of alkaline solution concentration, time and reagent temperature on the degree of deacetylation. In addition to simplifying the transformation process from three to two steps, the results show the influence of sodium hydroxide concentration (7.5-12.5 M), reaction time (30-180 min) and temperature (80-120°C) on the degree of déacétylation.