Cellulose-Based Transparent Edible Antibacterial Oxygen-Barrier Coating for Long-Term Fruit Preservation

Area of Science:

• Food Science and Technology
• Materials Science
• Biochemistry

Background:

• Long-term preservation of fresh produce without a cold chain is crucial for food security.
• Fruits and vegetables are susceptible to spoilage from microbial growth, oxidation, and moisture loss.
• Effective preservation requires a combination of multiple spoilage inhibition strategies.

Purpose of the Study:

• To develop a multifunctional, cellulose-based coating for extending the shelf life of fresh fruits and vegetables.
• To create an edible and transparent coating with antibacterial, antioxidant, and barrier properties.
• To evaluate the coating's efficacy in preserving various fruits under non-refrigerated conditions.

Main Methods:

• A cellulose microgel (CMG) was formulated into a composite coating with montmorillonite (MMT), cationic cellulose derivative (Cell-P+), and L-ascorbic acid (Vc).
• The coating's properties, including antibacterial, oxygen/water vapor barrier, and antioxidant capabilities, were characterized.
• The coating's application and effectiveness on different fruit surfaces for long-term freshness preservation were assessed.

Main Results:

• The developed cellulose-based coating demonstrated significant antibacterial, oxygen/water vapor barrier, and antioxidant functionalities.
• The coating exhibited good wetting properties on diverse fruit surfaces.
• Successful long-term freshness preservation of various fruits was achieved using this novel coating.

Conclusions:

• A multifunctional, edible, and washable cellulose-based coating effectively inhibits fruit spoilage mechanisms.
• This preservation technology can improve agricultural product quality and extend food shelf life without cold chain requirements.
• The coating offers a sustainable solution to reduce food waste and transportation costs.