Physical, mechanical and antibacterial properties of active composite film containing thyme of Shiraz extract (Zataria multiflora Boiss.) in food packaging

Document Type : Original Article

Authors

1 Dep. of Agriculture, Savadkooh Branch, Islamic Azad University, Savadkooh, Iran

2 Dep. of Agriculture, Savadkooh Branch, Islamic Azad Univesity, Savadkooh, Iran

3 Dep. of Food Science and Technology, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran

Abstract

The using biodegradable food packaging instead of its common synthetic types has been increased. Bio-polymers are used in the fabrication of new packages alone or as composite and active ones. The present study aims to investigate the physical, mechanical and antimicrobial properties of the active composite film with 5 treatments including polyvinyl alcohol: PVA (P) film alone, PVA and chitosan (PC), PVA/ chitosan and montmorillonite (PCM), PCM with 2 and 4% levels of thyme extract ( PCMAv) was carried out in a completely randomized design. The results showed that the addition of chitosan, nano clay and thyme extract to the composition of the PVA-base film could improve the physical, mechanical and antimicrobial properties of the composite film. PCM triple composite film containing 4% thyme extract with higher opacity than other films, has the highest tensile strength and Young's modulus (30.10 MPa and 0.14 MPa, respectively), the largest inhibitory zone diameter against Staphylococcus aureus and Escherichia coli (24.15 mm and 18.00 mm, respectively) and the lowest water vapour permeability (3.90 gmm/m2 h Pa). Therefore, this three-component active composite film, having desirable physical, mechanical and antimicrobial properties, can be used as a biodegradable packaging material in the food industry.

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References

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Packaging Science and Art
Volume 15, Issue 58 - Serial Number 58
Serial number 58, summer 2024
September 2024
Pages 29-36

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History

  • Receive Date: 17 March 2024
  • Revise Date: 27 April 2024
  • Accept Date: 21 August 2024
  • Publish Date: 15 September 2024

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