Modelling the effect of temperature on the water sorption isotherms of chitosan films
Food Sci. Technol (SBCTA, Impr.)
;
37(1): 112-118, Jan.-Mar. 2017. tab, graf
Article
in English
| LILACS
| ID: biblio-892174
ABSTRACT
Abstract The interaction of the water molecules from the environment with foods and other materials can be evaluated using sorption isotherms. Films and biodegradable films are susceptible to changes in their functional characteristics due to adsorbed water. The amount of moisture that biodegradable films can adsorb depends on the temperature, relative humidity of the storage area and chemical composition. Several mathematical models can be used to describe the behavior of sorption isotherms in biodegradable films and some of them have been modified to include the temperature parameter into the equation. In this research, the original and modified BET, GAB, Halsey, Henderson and Oswin models were assessed to determine their suitability describing the behavior of moisture adsorption isotherms of chitosan films at 15, 20, 25 and 30 °C. The modified models of GAB, Oswin and Halsey gave the best fit to the experimental sorption data of the chitosan films, with R2 values higher than 0.97 demonstrating that those models describe better the sorption isotherms at the temperatures studied.
Full text:
Available
Index:
LILACS (Americas)
Type of study:
Prognostic study
Language:
English
Journal:
Food Sci. Technol (SBCTA, Impr.)
Journal subject:
ALIMENTOS
/
Nutritional Sciences
Year:
2017
Type:
Article
Affiliation country:
Mexico
Institution/Affiliation country:
Instituto Politécnico Nacional/MX
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