Recent advancements in alginate-based films for active food packaging applications†

Abstract

Food packaging possesses a critical role in preserving food quality, increasing food shelf life, and reducing waste. This paper explores the potential of alginate-based food packaging as an environmentally friendly method for food-related issues. Alginate, a naturally occurring polysaccharide extracted from seaweed, has considerable potential as a sustainable packaging material due to its multifaceted properties. These properties enable alginate to encapsulate and preserve a wide range of food products effectively. Alginate food packaging has demonstrated its ability to prolong the shelf life of various food products, including fresh fruits, vegetables, meats, and baked goods. It is beneficial to maintain their moisture content and maintain oxygen levels. Furthermore, it is an effective barrier against microbial growth, while preserving the desired flavor and aroma profiles of the packaged items. Antimicrobial food packaging systems are specifically designed to inhibit microbial growth on surfaces, thus enhancing overall stability and preserving quality during storage periods. However, additional research is necessary to improve performance across various applications within the food industry. Alginate-based edible coatings have attracted significant attention due to their ability to enhance both sensory attributes, such as appearance, and mechanical properties across diverse categories including fruits, vegetables, meat, poultry, seafood, and cheese. These edible films mitigate drying effects on contents by regulating the respiration rate, ensuring optimal conditions for extended freshness and shelf life.