Alginate Edible Films Containing Essential Oils: Characterization and Bioactive Potential

Area of Science:

• Food Science
• Materials Science
• Microbiology

Background:

• Essential oils (EOs) possess valuable antimicrobial and antioxidant properties due to phenolic compounds.
• EOs face limitations in stability and bioavailability, hindering their direct application.
• Incorporating EOs into polymeric films is a strategy to enhance their efficacy and overcome limitations.

Purpose of the Study:

• To develop and characterize alginate-based edible films incorporating five different essential oils (rosemary, eucalyptus, oregano, sage, and thyme).
• To comprehensively evaluate the antimicrobial and antioxidant activities of these novel alginate-EO composite films.

Main Methods:

• Production of alginate-based edible films.
• Incorporation of five distinct essential oils: rosemary, eucalyptus, oregano, sage, and thyme.
• Characterization and evaluation of the antimicrobial and antioxidant properties of the developed films.

Main Results:

• Alginate films incorporated with essential oils demonstrated significant bioactive properties.
• The film containing oregano essential oil exhibited complete inhibition of all tested bacterial and fungal growth.
• Oregano essential oil-loaded alginate film displayed the highest antioxidant activity among the tested formulations.

Conclusions:

• Alginate films containing essential oils show promising potential as bioactive materials.
• These films could serve as biodegradable alternatives to conventional food packaging, mitigating environmental impact.
• Further research is required to assess safety (cytotoxicity, genotoxicity) and practical application in food matrices.