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This study developed a natural active film for bread packaging, extending shelf life without nanoparticles. The film effectively inhibits mold growth, meeting regulatory standards for food contact materials.

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Area of Science:

  • Food Science and Technology
  • Materials Science
  • Polymer Science

Background:

  • Growing consumer demand for natural, clean-label food packaging.
  • Regulatory restrictions on nanoparticles in food contact materials (EFSA, FDA).
  • Need for effective bread preservation methods beyond direct addition of preservatives.

Purpose of the Study:

  • To create an active composite film for bread packaging using renewable resources.
  • To enhance bread shelf life by preventing mold growth.
  • To develop a nanoparticle-free active packaging solution.

Main Methods:

  • Utilized pectin (PEC) and carboxymethyl cellulose (CMC) as the film matrix.
  • Incorporated oleic acid (OA) as a plasticizer and calcium propionate (CaP) as a crosslinker/preservative.
  • Added silver ion-loaded zeolite microparticles (AgZ) for enhanced antimold activity.

Main Results:

  • The active film demonstrated excellent barrier properties against O2 and CO2.
  • Water vapor permeance was improved by the OA plasticizer.
  • Low release of Ag+ and CaP, below regulatory limits.
  • Exceptional antimold activity against Aspergillus niger and Penicillium species, achieving >99.95% reduction.

Conclusions:

  • The developed active film offers a safe and effective solution for extending bread shelf life.
  • The film's properties are suitable for coating natural packaging materials like paper.
  • This innovation aligns with consumer preferences for natural and clean-label products.