Biomimetic polyphenol coatings for antioxidant active packaging applications
2016
Roman, Maxine J. | Decker, Eric A. | Goddard, Julie M.
Oxidative instability of food, pharmaceutical, and consumer products can be promoted by trace metals, especially iron and copper, with subsequent propagation of free radicals. Plant-derived phenolic compounds that contain catechols are reported to have free radical scavenging, metal chelating and surface adhesion properties upon polymerization. The objective of this study was to synthesize biomimetic polyphenol coatings for development of antioxidant active packaging materials. Two synthetic routes were explored to apply polyphenol coatings to the surface of polypropylene by in situ polymerization of a mixture of catechol and catechin and oxidative polymerization with laccase and in alkaline saline. Both polyphenol coatings demonstrated potent metal chelating and radical scavenging capacity, which suggest potential antioxidant capacity. Dual functionality of polyphenol coatings as potent antioxidants and anchors makes them a promising candidate for active packaging coatings that can inhibit metal-promoted oxidative degradation.
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