title: α-Tocopherol-loaded Polycaprolactone (PCL) nanoparticles as a heat-activated oxygen scavenger.
abstract: A nanoencapsulation technique was applied to an oxygen-scavenging system, and thermal processing was investigated as an activator to trigger the oxygen-scavenging reaction. α-Tocopherol-loaded polycaprolactone (PCL) nanoparticles (NPs) were prepared using an oil-in-water emulsion solvent evaporation method. The influences of iron(II) chloride, water, and thermal processing on the oxygen-scavenging capability were investigated. NPs without iron(II) chloride, moisture, and thermal processing had no oxygen-scavenging effect. However, the oxygen content (%) in the cup headspace of 20.9% decreased to 20.4% when the oxygen-scavenging system contained NPs, water, and iron(II) chloride. The oxygen content (%) decreased further to 19.5% when water was eliminated from the mixture. In this research, NPs and iron(II) chloride with thermal processing had an oxygen-scavenging capacity of 6.44 cm3 of O2/g and an oxygen-scavenging rate of 0.21 cm3 of O2 g(-1) day(-1). Results indicated that NPs and iron(II) chloride in an oxygen-scavenging system can be used as a heat-activated oxygen scavenger.
authors.affiliation: Department of Packaging Science, B-212 Poole and Agricultural Center, Clemson University , Clemson, South Carolina 29634-0320, United States.
authors.forename: Youngjae
authors.initials: Y
authors.lastname: Byun
authors.forename: Scott
authors.initials: S
authors.lastname: Whiteside
authors.forename: Kay
authors.initials: K
authors.lastname: Cooksey
authors.forename: Duncan
authors.initials: D
authors.lastname: Darby
authors.forename: Paul L
authors.initials: PL
authors.lastname: Dawson
mesh_terms: D005296:Ferrous Compounds / Q000494:pharmacology; D006358:Hot Temperature; D053758:Nanoparticles / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D011091:Polyesters / Q000737:chemistry*; D014867:Water; D024502:alpha-Tocopherol / Q000737:chemistry*
chemical_list: D005296:Ferrous Compounds; D011091:Polyesters; D014867:Water; C016240:polycaprolactone; D024502:alpha-Tocopherol; C029451:ferrous chloride; D010100:Oxygen