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Structures, Properties and Applications of Alginates.

Roya Abka-Khajouei1,2, Latifa Tounsi2,3, Nasim Shahabi4

  • 1Department of Food Science and Technology, College of Agriculture, Isfahan University of Technology, Isfahan 84154, Iran.

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|June 23, 2022
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Summary

Alginate, a hydrocolloid from brown algae, forms hydrogels with diverse applications. Its unique structure, based on d-mannuronic and l-guluronic acids, influences properties for food, medicine, and industry.

Keywords:
alginatehydrocolloidspolysaccharideseaweeds

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Area of Science:

  • Biopolymer Science
  • Materials Science

Background:

  • Alginate is a versatile hydrocolloid derived from brown algae and bacterial sources.
  • It forms hydrogels, which are cross-linked polymeric networks capable of absorbing significant amounts of water.
  • Sodium alginate is a prominent example within the hydrogel classification.

Purpose of the Study:

  • To review the structural, physical, and chemical properties of alginate.
  • To explore the wide-ranging industrial applications of alginate.
  • To highlight alginate's significance as a safe and adaptable biomaterial.

Main Methods:

  • Literature review of alginate's properties and applications.
  • Analysis of alginate's chemical structure (d-mannuronic and l-guluronic acids).
  • Examination of monomer arrangement (alternating, sequential, random) and its impact.

Main Results:

  • Alginate's structure, dictated by monomer sequence, influences its physical and chemical characteristics.
  • Demonstrated broad utility across food, medical, tissue engineering, and environmental sectors.
  • Established alginate as generally recognized as safe (GRAS) for various uses.

Conclusions:

  • Alginate's unique polysaccharide structure underpins its diverse functionality.
  • Its adaptability makes it a valuable material in numerous industrial and biomedical fields.
  • Further research into alginate's properties can unlock novel applications.