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Titanium dioxide nanoparticles as multifunctional surface-active materials for smart/active nanocomposite packaging

Mahmood Alizadeh Sani1, Mohammad Maleki2, Hadi Eghbaljoo-Gharehgheshlaghi1

  • 1Division of Food Safety and Hygiene, Department of Environmental Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.

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Summary

Titanium dioxide nanoparticles (TNPs) enhance biodegradable food packaging by improving physical, barrier, and antimicrobial properties. These safe nanoparticles offer a promising solution for extending the shelf life of fresh produce.

Keywords:
Food packagingMigration phenomenonNanocompositesPhotocatalytic activityTitanium dioxide nanoparticles

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Area of Science:

  • Materials Science
  • Food Science
  • Nanotechnology

Background:

  • Growing environmental concerns and demand for safe food drive innovation in smart/active food packaging.
  • Colloidal nanoparticles (NPs) are increasingly explored as functional additives for advanced packaging materials.

Purpose of the Study:

  • To comprehensively review the functional properties and advantages of titanium dioxide nanoparticles (TNPs) in smart/active food packaging films.
  • To investigate the practical and migration properties of TNPs in food packaging applications.

Main Methods:

  • Literature review of studies on TNPs in food packaging.
  • Analysis of TNPs' impact on physical, mechanical, barrier, optical, and thermal properties of packaging films.
  • Evaluation of antimicrobial and photocatalytic activities of TNPs.

Main Results:

  • TNPs improve physical, mechanical, moisture/light barrier, optical, and thermal resistance properties of packaging.
  • TNPs exhibit significant antimicrobial and photocatalytic activities.
  • TNPs demonstrate ethylene decomposition activity, aiding in extending fruit/vegetable shelf life.
  • TNPs show negligible migration rates, indicating safety for food contact.

Conclusions:

  • TNPs are effective nano-fillers for biodegradable food packaging, offering enhanced functionality.
  • The antimicrobial and ethylene scavenging properties of TNPs contribute to food preservation.
  • TNPs are safe for food packaging applications, enabling the creation of multifunctional smart/active films.