Roles of polyphenols incorporated in starch-based films and coatings for fruits and vegetables preservation: A review

Abstract

Background

Recently, with great interest in starch-based active packaging, polyphenols of food by-products and wastes can be extracted and applied as a source of bioactive ingredients. Starch-based films with polyphenols emerge promising potential in functional activities for fruit and vegetable preservation.

Scope and approach

This review systematically discusses recent developments in polyphenols extraction for packaging development, and the effect on starch-based packaging materials, with a particular emphasis on barrier property, antioxidant activity, antimicrobial capacity and safety assessment. The effect of polyphenols-starch active films and coatings is further demonstrated with the function overview in the preservation of fruits and vegetables. Furthermore, the challenges and prospects for theoretical research and industrial scaling up in this field are discussed.

Key findings and conclusions

Although innovative technologies favor polyphenol extraction, ultrasound-assisted extraction is the most common with the advantage of convenience and low cost. The introduction of polyphenols into starch matrix can significantly improve shielding properties against water vapor, gas and light, antioxidant and antimicrobial activities, which are key factors in prolonging shelf life of fruits and vegetables. Polyphenol-starch active packaging materials have potential for improving food quality and resource utilization, reducing food waste and environmental pollution.