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Influence of the concentrations of chitosan and glycerol on edible film properties showed by response surface methodology

Cissé M., Montet D., Loiseau G., Ducamp-Collin M.N.. 2012. Journal of Polymers and the Environment, 20 (3) : p. 830-837.

The individual and interactive effects of glycerol and chitosan concentrations on edible film properties were investigated using response surface methodology. The results of ANOVA indicated that all the independent variables exhibited significant effect on the film properties. Chitosan concentration had a positive effect on CO2 permeability and negative effect on O2 while the glycerol concentration had a positive effect on permeability to both gases. Regarding water vapor permeability, the chitosan concentration had a negative effect, whereas the glycerol had no influence. Moreover, both chitosan and glycerol concentration influenced the elongation at break point (%A), and only glycerol concentration had a significant effect on tensile strength. Optimization by desirability approach was carried out on the independent variables to get the optimum levels within the experimental conditions. It was found that 1.5 % of chitosan and 25 % of glycerol (wt/wt of chitosan) retarded respiration and showed a strong permeability to water vapor. (Résumé d'auteur)

Mots-clés : propriété mécanique; vapeur d'eau; gaz; perméabilité; glycérol; chitosane; matériau de conditionnement; film (matériau)

Thématique : Conditionnement; Traitement et conservation des produits alimentaires

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