Customer demand for wholesome diets has spurred researchers to explore preservative-free methods for maintaining food product quality. Nano emulsion-based coatings and films are seen as sustainable solutions for extending the shelf life of fresh produce. These innovations are driving progress in various industries. Nano emulsion techniques offer effective encapsulation of bioactive compounds due to their small droplet size, stability, and enhanced activity. This review highlights the preparation and manufacturing methods of biopolymer-based nano emulsions containing essential oils, which are used as edible coatings and films over the past decade, representing the first comprehensive review paper on this topic to encompass research from the past ten years. The characterization and application of these coatings and films are also discussed. It has been revealed that essential oils can be successfully incorporated into nano emulsion delivery system with different biopolymers. These edible coatings and films help delay or prevent oxidation in various food products, enhancing their quality and safety during storage. They present a green, sustainable, and biodegradable solution for protecting fresh foods in the industry. Essential oil biopolymer nano emulsions not only extend shelf life but also offer protection against hazards, contributing to consumer trust in food safety and quality. This technology holds promise for delivering healthier food options in the marketplace. The current review thus provides an updated overview of the latest literature on EO nano emulsions as active agents in the advancement of edible coatings and films.
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