title: Influence of non-migratory metal-chelating active packaging film on food quality: impact on physical and chemical stability of emulsions.
abstract: Previously, we developed a novel metal-chelating packaging film (PP-g-PAA) by grafting acrylic acid (AA) monomer from polypropylene (PP) film surface, and demonstrated its potential in controlling iron-promoted lipid oxidation. Herein, we further established the industrial practicality of this active film. Specifically, the influence of film surface area-to-product volume ratio (SA/V) and product pH on the application of the film was investigated using an oil-in-water emulsion system. The films equally inhibited lipid oxidation throughout the range of SA/V ratios tested (2-8 cm(2)/ml). PP-g-PAA films were most effective at pH 7.0, and the activity decreased with decreasing pH. The particle size examination of emulsions indicated no adverse influence from the active film on the stability of this emulsion system. FTIR analysis suggested a non-migratory nature of PP-g-PAA films. These results provide fundamental knowledge that will facilitate the application of this effective and economical active packaging film in the food industry.
authors.affiliation: Department of Food Science, University of Massachusetts, Chenoweth Lab, 102 Holdsworth Way, Amherst, MA 01003, United States.
authors.forename: Fang
authors.initials: F
authors.lastname: Tian
authors.affiliation: Department of Food Science, University of Massachusetts, Chenoweth Lab, 102 Holdsworth Way, Amherst, MA 01003, United States.
authors.forename: Eric A
authors.initials: EA
authors.lastname: Decker
authors.affiliation: Department of Food Science, University of Massachusetts, Chenoweth Lab, 102 Holdsworth Way, Amherst, MA 01003, United States.
authors.forename: D Julian
authors.initials: DJ
authors.lastname: McClements
authors.affiliation: Department of Food Science, University of Massachusetts, Chenoweth Lab, 102 Holdsworth Way, Amherst, MA 01003, United States. Electronic address: goddard@foodsci.umass.edu.
authors.forename: Julie M
authors.initials: JM
authors.lastname: Goddard
mesh_terms: D000975:Antioxidants; D002614:Chelating Agents / Q000737:chemistry*; D004655:Emulsions; D018857:Food Packaging / Q000379:methods; D063427:Food Quality; D008670:Metals / Q000737:chemistry*; D010084:Oxidation-Reduction
chemical_list: D000975:Antioxidants; D002614:Chelating Agents; D004655:Emulsions; D008670:Metals
keywords: Active packaging film; Antioxidant; Emulsion; Lipid oxidation; Metal-chelating; Non-migratory