Photografting of conducting polymer onto polymeric substrate as non-migratory antioxidant packaging

A non-migratory antioxidant clean label was developed by photografting monomers onto a conventional packaging polymer. The polypropylene (PP) film was initially brushed with glycidyl methacrylate (GMA) to prepare a reactive surface with a large amount of oxirane ring (PP-g-GMA) using a photografting...

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Bibliographic Details
Published in:Reactive & functional polymers 2021-01, Vol.158, p.104792, Article 104792
Main Authors: Sadeghi, Kambiz, Jee, Hyung-Woo, Paeng, Ki-Jung, Seo, Jongchul
Format: Article
Language:English
Subjects:
Anisidine
Antioxidant clean label
Antioxidants
Atomic structure
Conducting polymer
Conducting polymers
Electrochemical analysis
Ethylene oxide
Food
Food matrices
Morphology
Oxidation
Packaging
Photografting coating
Polymers
Ring opening
Shelf life
Studies
Substrates
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Summary:A non-migratory antioxidant clean label was developed by photografting monomers onto a conventional packaging polymer. The polypropylene (PP) film was initially brushed with glycidyl methacrylate (GMA) to prepare a reactive surface with a large amount of oxirane ring (PP-g-GMA) using a photografting method. Next, a conducting polymer (p-anisidine (PA)) was immobilized on the surface of reactive film (PP-g-GMA) through a ring-opening reaction to develop an antioxidant film (PP-g-GMA-g-PA). The chemical structure and atomic composition of the surface of the antioxidant film were characterized through FTIR and XPS, respectively. In addition, the microstructure and morphology of the grafted surface were observed by SEM and AFM. A DPPH assay and electrochemical analysis showed that the PP-g-GMA-g-PA film displayed antioxidant properties and oxidation/reduction features. Moreover, the storage test in various food matrices demonstrated that the antioxidant films can prolong the shelf life of food, in which the antioxidant film significantly retarded vitamin C degradation and oil oxidation during storage. This system exhibited non-migratory characteristics; no migration residues were detected in simulant solvents after incubation, which can be used for biomedical and packaging applications. [Display omitted] •Photografting of conducting polymer onto the brushed substrate planer.•P-anisidine immobilized on the surface as free-radical scavenging film.•Photographing antioxidant film to retard vitamin C degradation and oil oxidation.•Non-migratory antioxidant clean label for biomedical and packaging applications.
ISSN:1381-5148
1873-166X
DOI:10.1016/j.reactfunctpolym.2020.104792