Crabs Marine Waste—A Valuable Source of Chitosan: Tuning Chitosan Properties by Chitin Extraction Optimization

Chitin extraction from crab shells was studied experimentally and optimized aiming to obtain chitosan with predefined deacetylation degree and molecular mass. To find out the optimum operating conditions that ensure the obtaining of a chitosan with highest deacetylation degree and specific molecular...

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Bibliographic Details
Published in:Polymers Vol. 14; no. 21; p. 4492
Main Authors: Gîjiu, Cristiana Luminița, Isopescu, Raluca, Dinculescu, Daniel, Memecică, Maria, Apetroaei, Manuela-Rossemary, Anton, Mirela, Schröder, Verginica, Rău, Ileana
Format: Journal Article
Language:English
Published: Basel MDPI AG 24.10.2022
MDPI
Subjects:
Analysis
Animal waste
Antimicrobial agents
Biopolymers
Chitin
Chitosan
Crustaceans
Demineralizing
Drug delivery systems
Extraction (Chemistry)
Identification and classification
Low temperature
Methods
Optimization
Orthogonal arrays
Polymers
Properties
Proteins
Spectrum analysis
Viscosity
Romania
ISSN:2073-4360, 2073-4360
Online Access:Get full text
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Summary:Chitin extraction from crab shells was studied experimentally and optimized aiming to obtain chitosan with predefined deacetylation degree and molecular mass. To find out the optimum operating conditions that ensure the obtaining of a chitosan with highest deacetylation degree and specific molecular mass four parameters were varied: the concentration of NaOH and the temperature for deproteinization step, respectively HCl concentration and the number of acidic treatments for the demineralization stage. The experiment was carried on following Taguchi orthogonal array L9, and the best combination of factors was found using the desirability function approach. The optimization results showed that 5% NaOH concentration and low temperatures lead to a chitosan with high deacetylation degree. High molecular mass chitosan is obtained when a single step acidic treatment is used, while a chitosan with low molar mass is obtained for multiple acid contacts and higher HCl concentration.
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ISSN:2073-4360
2073-4360
DOI:10.3390/polym14214492