Functional polysaccharides as edible coatings for cheese.

Area of Science:

• Food Science
• Material Science

Background:

• Synthetic coatings are commonly used for cheese preservation.
• There is a growing demand for natural and sustainable food packaging alternatives.

Purpose of the Study:

• To evaluate polysaccharides from nontraditional sources as edible cheese coatings.
• To assess the impact of these coatings on cheese properties and shelf life.

Main Methods:

• Tested chitosan, galactomannan, and agar as coating agents.
• Formulated coatings with plasticizers and oils, then characterized surface properties and film permeability (water vapor, O2, CO2).
• Evaluated cheese respiration rates and mold growth under coated and uncoated conditions.

Main Results:

• Galactomannan from Gleditsia triacanthos (1.5%) with glycerol (2.0%) and oil (0.5%) showed optimal cheese coating properties.
• This formulation exhibited excellent wettability, low water vapor and gas permeability, and good opacity.
• Coated cheese demonstrated reduced respiration rates (O2 consumption, CO2 production) and significantly less mold growth compared to uncoated samples.

Conclusions:

• Polysaccharide-based edible coatings, particularly galactomannan, are effective alternatives to synthetic cheese coatings.
• These natural coatings enhance cheese preservation by controlling respiration and inhibiting microbial spoilage.
• The study highlights the potential of utilizing plant-derived polysaccharides for developing sustainable food packaging solutions.