Abstract
Issues of environmental protection and health concerns have risen the trend to find an alternative for nondegradable packaging material and chemical dyes. The nontoxicity, ecofriendly nature, and functional activities of natural pigments are the primary reasons for their incorporation into biodegradable polymers for the preparation of food packaging films. Natural pigments are also being studied to fabricate active and smart packaging films. Molecular interaction among natural pigments and the polymer significantly affects the characteristics of prepared packaging films. Natural pigment improves the physical as well as functional properties of packaging material but sometimes it may negatively affect the characteristics of film depending on the chemical nature of pigments and polymers, and their proportion. The barrier, antioxidant, antimicrobial, pH-responsive colorimetric properties of natural pigments are being utilized to monitor and the freshness of various food products. In this chapter, an attempt has been made to discuss various biodegradable polymers, natural pigments, and their uses in films as well as the influence they exert on the packaging materials. Several research has been done on the incorporation of natural pigments in the packaging material and the impact they produce. However, more studies are required to globally commercialize these natural pigments-based biodegradable packaging films.
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