1. Mass Transfer and Optical Properties of Active PET/PP Food-Grade Films Impregnated with Olive Leaf Extract.
- Author
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Cejudo Bastante, Cristina, Cran, Marlene J., Casas Cardoso, Lourdes, Serrano, Casimiro Mantell, and Bigger, Stephen W.
- Subjects
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EDIBLE coatings , *OLIVE leaves , *ACTIVE food packaging , *MASS transfer , *OPTICAL properties - Abstract
A supercritical solvent impregnation (SSI) technique was employed to incorporate, by batch- and semicontinuous-modes, bioactive olive leaf extract (OLE) into a food-grade multilayer polyethylene terephthalate/polypropylene (PET/PP) film for active food packaging applications. The inclusion of OLE in the polymer surfaces significantly modified the colour properties of the film. A correlation of 87.06% between the CIELAB colour parameters and the amount of the OLE impregnated in the film was obtained which suggests that colour determination can be used as a rapid, non-destructive technique to estimate the OLE loading in the impregnated matrices. The UV barrier and water permeability properties of the films were not significantly modified by the incorporation of OLE. The migration of OLE into a 50% (v/v) ethanol food simulant demonstrated faster release of OLE from the PP surface than from the PET surface which may be due to the different interactions between OLE and each polymer. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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