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Generation of Alginate Microspheres for Biomedical Applications

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Alginate Edible Films Containing Essential Oils: Characterization and Bioactive Potential.

Ana I Lopes¹, Adma Melo¹, Tiago B Afonso¹

¹CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal.

|May 14, 2025

Summary

This summary is machine-generated.

Alginate films with essential oils (EOs) show strong antimicrobial and antioxidant effects. Oregano EO films notably inhibited all tested microbes, offering potential for eco-friendly food packaging.

Keywords:

antimicrobial activity antioxidant activity edible films essential oils film’s characterization

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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.