Extraction et caractérisation d’un biopolymère à base de chitosane extrait de carapace de crevette
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Date
2023-06-24
Journal Title
Journal ISSN
Volume Title
Publisher
UNIVERSITÉ 20 AOÛT 1955 SKIKD
Abstract
Abstract
For many years, shrimp shells have been neglected as a waste product. Today, however,
this waste product plays a very important role in various fields, such as the plastics industry.
Indeed, chitosan has become a substitute for fossil sources for its properties and characteristics.
The work carried out in this thesis concerns the preparation of chitosan from shrimp shells
harvested in the Skikda region. Different preliminary treatments (washing, drying, grinding)
are applied to the starting products, followed by chemical extraction applications. We are
primarily interested in the extraction of chitin from shrimp shells, and its conversion into
chitosan, using different extraction methods. The products obtained were characterized by
solubility tests. The chitosan obtained is fairly soluble at low acetic acid concentrations, but as
the concentration increases, the solubility rate decreases. The determination of the degree of
deacetylation (DDA) and the degree of acetylation (DA) was carried out using the infrared
analysis technique. FRX analysis determined the composition of the biopolymer. This led to
the conclusion that chitosan has a place in the plastics industry, as well as in the cosmetics and
agri-food sectors.