title: Synthesis of Iminodiacetate Functionalized Polypropylene Films and Their Efficacy as Antioxidant Active-Packaging Materials.
abstract: The introduction of metal-chelating ligands to the food-contact surface of packaging materials may enable the removal of synthetic chelators (e.g., ethylenediamine tetra-acetic acid (EDTA)) from food products. In this study, the metal-chelating ligand iminodiacetate (IDA) was covalently grafted onto polypropylene surfaces to produce metal-chelating active-packaging films. The resulting films were able to chelate 138.1 ± 26 and 210.0 ± 28 nmol/cm(2) Fe(3+) and Cu(2+) ions, respectively, under acidic conditions (pH 3.0). The films demonstrated potent antioxidant efficacy in two model food systems. In an emulsified-oil system, the chelating materials extended the lag phase of both lipid hydroperoxide and hexanal formation from 5 to 25 days and were as effective as EDTA. The degradation half-life of ascorbic acid in an aqueous solution was extended from 5 to 14 days. This work demonstrates the potential application of surface-grafted chelating IDA ligands as effective antioxidant active food-packaging materials.
authors.affiliation: Department of Food Science, University of Massachusetts, Chenoweth Lab , 102 Holdsworth Way, Amherst, Massachusetts 01003, United States.
authors.forename: Zhuangsheng
authors.initials: Z
authors.lastname: Lin
authors.affiliation: Department of Food Science, University of Massachusetts, Chenoweth Lab , 102 Holdsworth Way, Amherst, Massachusetts 01003, United States.
authors.forename: Maxine J
authors.initials: MJ
authors.lastname: Roman
authors.affiliation: Department of Food Science, University of Massachusetts, Chenoweth Lab , 102 Holdsworth Way, Amherst, Massachusetts 01003, United States.|Bioactive Natural Products Research Group, Department of Biochemistry, Faculty of Science, King Abdulaziz University , P.O. Box 80203, Jeddah 21589, Saudi Arabia.
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, Massachusetts 01003, United States.
authors.forename: Julie M
authors.initials: JM
authors.lastname: Goddard
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D003300:Copper / Q000737:chemistry; D018857:Food Packaging / Q000295:instrumentation*; D007098:Imino Acids / Q000737:chemistry*; D007501:Iron / Q000737:chemistry; D011126:Polypropylenes / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D007098:Imino Acids; D011126:Polypropylenes; D003300:Copper; D007501:Iron; C008109:iminodiacetic acid
keywords: active packaging; antioxidant; iminodiacetate; metal chelation; photografting