1. Introduction
In recent years, increasing attention has been directed to the
development of
films with antimicrobial and antifungal properties
in order to improve food safety, extend shelf-life and to minimize
the use of chemical preservatives [1]. Consumers are also
demanding the packaging materials to be formulated from natural
materials, environmentally friendly and biodegradable while
improving food preservation [2–7]. Chitosan, a natural biopolymer
has immense potential for applications in food technology, owing
to its biocompatibility, non-toxicity, short time biodegradability
and excellent
film forming ability. Besides, chitosan has inherent
antimicrobial and antifungal properties against various groups of
pathogenic and spoilage microorganisms [8].
To enhance the antibacterial and antioxidative properties of
chitosan, antimicrobials could be incorporated into it to achieve a
synergistic effect. Among the antimicrobial agents used in
packaging
films, grapefruit seed extract (GFSE) is antioxidant
and exhibits a wide spectrum of microbial growth inhibition
against both Gram-positive and Gram-negative bacteria [9–11].
1. IntroductionIn recent years, increasing attention has been directed to thedevelopment offilms with antimicrobial and antifungal propertiesin order to improve food safety, extend shelf-life and to minimizethe use of chemical preservatives [1]. Consumers are alsodemanding the packaging materials to be formulated from naturalmaterials, environmentally friendly and biodegradable whileimproving food preservation [2–7]. Chitosan, a natural biopolymerhas immense potential for applications in food technology, owingto its biocompatibility, non-toxicity, short time biodegradabilityand excellentfilm forming ability. Besides, chitosan has inherentantimicrobial and antifungal properties against various groups ofpathogenic and spoilage microorganisms [8].To enhance the antibacterial and antioxidative properties ofchitosan, antimicrobials could be incorporated into it to achieve asynergistic effect. Among the antimicrobial agents used inpackagingfilms, grapefruit seed extract (GFSE) is antioxidantand exhibits a wide spectrum of microbial growth inhibitionagainst both Gram-positive and Gram-negative bacteria [9–11].
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