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Edible Coatings for Fresh Fruits: Functional Roles, Optimization Strategies, and Analytical Perspectives.

Siphumle Owen Jama1, Robert Lufu1, Umezuruike Linus Opara1,2

  • 1Packaging and Cold Chain Research Group, Africa Institute for Postharvest Technology, Department of Horticultural Science, Faculty of AgriSciences, Stellenbosch University, Stellenbosch 7602, South Africa.

Plants (Basel, Switzerland)
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PubMed
Summary

Edible coatings made from natural biopolymers offer a sustainable alternative to plastic packaging for fresh fruits, improving quality and shelf life. Further research is needed for industrial application and regulatory approval.

Keywords:
biopolymerscoatingsloss-reductionpackagingpolysaccharidesshelf-lifesustainability

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Area of Science:

  • Food Science
  • Materials Science
  • Sustainable Packaging

Background:

  • Fresh fruits face postharvest deterioration challenges like moisture loss and microbial decay.
  • Conventional plastic packaging has environmental drawbacks, driving demand for sustainable solutions.
  • Edible coatings, derived from biopolymers, present a promising eco-friendly alternative for fruit preservation.

Purpose of the Study:

  • To review recent advancements in edible coatings for fresh fruits.
  • To analyze material classes, functional performance, optimization, and evaluation methods.
  • To identify limitations and future research directions for edible coating technology.

Main Methods:

  • Literature review synthesizing recent research on edible coatings for fresh fruits.
  • Emphasis on material classification, functional performance assessment, and optimization strategies.
  • Evaluation of analytical methods for assessing coating effectiveness.

Main Results:

  • Polysaccharide coatings offer good gas permeability but poor moisture resistance.
  • Nanocomposite and multi-component systems improve water vapor barriers without hindering respiration.
  • Bioactive agents enhance shelf life via antimicrobial and antioxidant effects, but sensory trade-offs exist.

Conclusions:

  • Edible coatings show potential for fresh fruit preservation, offering multifunctional benefits.
  • Challenges remain in property variability, industrial scalability, long-term validation, and regulation.
  • Future work should focus on mechanistic understanding, standardized metrics, scalable application, and lifecycle design.