Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 51, Issue 26, Pages 7647-7654Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf034646x
Keywords
edible films; gliadins; glutenins; tensile strength; water vapor permeability
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Gliadins and glutenins were extracted from commercial wheat gluten on the basis of their extractability in ethanol and used to produce film-forming solutions. Films cast using these gliadin- and glutenin-rich solutions were characterized. Glycerol was used as a plasticizer, and its effect on the films was also studied. Films obtained from the glutenin fraction presented higher tensile strength values and lower elongation at break and water vapor permeability values than gliadin films. Gliadin films disintegrated when immersed in water. The GAB isotherm model was used to describe the equilibrium moisture sorption of the films. The glycerol concentration largely modified mechanical and water vapor barrier properties of both film types.
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