Abstract
Active food packaging involves the packaging of foods with materials that provide an enhanced functionality, such as antimicrobial, antioxidant or biocatalytic functions. This can be achieved through the incorporation of active compounds into the matrix of the commonly used packaging materials, or by the application of coatings with the corresponding functionality through surface modification. The latter option offers the advantage of preserving the packaging materials’ bulk properties nearly intact. Herein, different coating technologies like embedding for controlled release, immobilization, layer-by-layer deposition, and photografting are explained and their potential application for active food packaging is explored and discussed.
Highlights
Active packaging, in which the packaging material performs an additional function beyond containment and basic protection, remains an area of active research with great potential for commercial applications.Active packaging has application in packaging of food, pharmaceutical, and consumer goods products, with a common goal of improving shelf life, safety, or quality of packaged goods
A number of excellent reviews have been written on targeted applications of active packaging materials with less focus on Coatings 2015, 5 material synthesis techniques [1,2,3,4,5]
Synthesis can be achieved by incorporating an active agent within or at the product contact surface of a packaging material
Summary
In which the packaging material performs an additional function beyond containment and basic protection, remains an area of active research with great potential for commercial applications. Synthesis can be achieved by incorporating an active agent (e.g., antioxidant, enzyme, antimicrobial, oxygen scavenger) within or at the product contact surface of a packaging material. Understanding the technologies and challenges associated with various coating methods for preparation of active packaging materials will support effective technology transfer to commercial applications. The goal of this review is to describe key technologies for preparing active packaging coatings, including embedding, layer-by-layer deposition, and photografting, with a discussion of the difference between covalent (non-migratory) and non-covalent (migratory) immobilization chemistries. We survey the current literature for active packaging technologies using these coating methods to impart antimicrobial, antioxidant, and biocatalytic activity. We conclude with a discussion of the challenges that remain in achieving commercial translation for active packaging coatings
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