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Exploring Biodegradable Polymeric Nanocomposite Films for Sustainable Food Packaging Application.

Nikolay Estiven Gomez Mesa1,2,3, Alis Yovana Pataquiva-Mateus1, Youhong Tang2

  • 1Department of Engineering, Universidad de Bogotá Jorge Tadeo Lozano, Bogotá 111711, Colombia.

Polymers
|August 28, 2025
PubMed
Summary
This summary is machine-generated.

This study developed a biodegradable film from calcium caseinate, starch, and bentonite nanoclay, enhancing mechanical strength and barrier properties for sustainable food packaging.

Keywords:
bentonitebio-nanocompositebiopolymeric filmcaseinpolyvinyl alcoholstarch

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Area of Science:

  • Materials Science
  • Polymer Science
  • Food Science

Background:

  • Developing sustainable and functional packaging materials is crucial for reducing environmental impact.
  • Biopolymer-based films offer a biodegradable alternative to conventional plastics.
  • Nanocomposite technology can enhance the properties of biopolymer films.

Purpose of the Study:

  • To formulate and synthesize a novel bio-nanocomposite film.
  • To evaluate the mechanical, barrier, and biodegradability properties of the developed film.
  • To explore the potential of this bio-nanocomposite for food packaging applications.

Main Methods:

  • Solution casting method was employed for film synthesis.
  • Calcium caseinate, modified starch, bentonite nanoclay, glycerol, and polyvinyl alcohol (PVA) were used as components.
  • Mechanical strength (tensile strength), water vapor permeability, microbial analysis, and biodegradability tests were conducted.

Main Results:

  • The incorporation of PVA and bentonite significantly improved the tensile strength by up to 30%.
  • Bentonite nanostructures effectively reduced water vapor permeability, enhancing barrier properties.
  • The film exhibited a consistent degradation trend, with complete disintegration expected around 13 weeks in soil.
  • Microbial analysis indicated bacterial colonies remained within permissible levels for non-antimicrobial films.

Conclusions:

  • The developed bio-nanocomposite film demonstrates enhanced mechanical and barrier properties.
  • The film shows promising biodegradability, suitable for sustainable food packaging.
  • Further research into antibacterial properties is recommended for broader applications.