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Analysis and Specification of Starch Granule Size Distributions
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Starch-based films: Major factors affecting their properties.

Rahul Thakur1, Penta Pristijono1, Christopher J Scarlett1

  • 1School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia.

International Journal of Biological Macromolecules
|March 31, 2019
PubMed
Summary

Starch is a popular biopolymer for edible films, offering good barrier properties but weak mechanical strength. This review details factors influencing starch-based film properties for improved applications.

Keywords:
CoatingFilmGelatinizationRetrogradationStarch

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Area of Science:

  • Material Science
  • Polymer Science
  • Food Science

Background:

  • Starch, a plant polysaccharide, is abundant, cost-effective, and possesses excellent film-forming capabilities.
  • Starch-based films exhibit desirable optical, organoleptic, and gas barrier properties.
  • A key limitation of starch-based films is their poor mechanical and tensile strength.

Purpose of the Study:

  • To review the use of starch as a primary material for edible films and coatings.
  • To comprehensively discuss the major factors influencing the properties of starch-based films.
  • To understand the mechanisms behind these factors for future development of improved starch films.

Main Methods:

  • Literature review focusing on starch-based edible films and coatings.
  • Analysis of factors affecting film properties, including starch type, processing conditions, and additives.
  • Discussion of strategies to enhance mechanical and tensile properties.

Main Results:

  • Starch-based films possess inherent strengths in barrier and optical characteristics.
  • Mechanical properties are significantly impacted by factors such as plasticizers, co-biopolymers, and processing parameters.
  • Various additives and processing adjustments can mitigate the poor mechanical performance of starch films.

Conclusions:

  • Starch remains a promising biopolymer for edible films, despite mechanical limitations.
  • Understanding the influence of processing parameters and additives is crucial for optimizing starch-based film performance.
  • Further research into material modification can lead to advanced starch films with enhanced functionality.