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Effect of storage conditions on the tensile properties of eco-friendly chitosan films by response surface methodology.

Srinivasa, P. C. and Ravi, R. and Tharanathan, R. N. (2007) Effect of storage conditions on the tensile properties of eco-friendly chitosan films by response surface methodology. Journal of Food Engineering, 80 (1). pp. 184-189.

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Abstract

The effect of temperature (4-50C), relative humidity (RH, 40-80%), and storage period (3-9 days) on the mechanical properties such as tensile strength (TS), percent elongation (%E) and modulus of elasticity (ME) of biodegradable chitosan film was studied by applying response surface methodology and Box-Behnken design of experiment. The results of ANOVA indicated that all the independent variables exhibited significant effect on the film properties. Temperature and RH exerted greater influence on TS and %E, while storage period showed moderate influence. Both linear and quadratic terms exerted significant (p<0.01) effect, but total quadratic effect (p<0.01) dominated over the total linear effect (p<0.01). Simultaneous optimization by desirability approach was carried out on the independent variables to get the optimum levels within the experimental conditions. It was found that at 20C, 40% RH and a storage period of approx. equal to 7 days, the optimum values for TS, %E and ME were 35.8MPa, 29.9% and 896.7MPa, respectively. The predicted responses were validated and the difference between the predicted and experimental responses was not significantly different (p<0.05).

Item Type: Article
Uncontrolled Keywords: FILMS-; HUMIDITY-; MECHANICAL-PROPERTIES; POLYSACCHARIDES-; STORAGE-; TEMPERATURE-; CHITOSAN-; RH-; TEMP.-
Subjects: 600 Technology > 08 Food technology > 11 Food Biochemistry
600 Technology > 08 Food technology > 28 Meat, Fish & Poultry
Divisions: Dept. of Biochemistry
Depositing User: Users 16 not found.
Date Deposited: 26 Jul 2011 11:37
Last Modified: 26 Jul 2011 11:37
URI: http://ir.cftri.com/id/eprint/8097

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