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Fabrication and Design of Wood-Based High-Performance Composites
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Starch composites with aconitic acid.

William Neil Gilfillan1, William O S Doherty1

  • 1Centre for Tropical Crops and Biocommodities, Gardens Point Campus, Queensland University of Technology, H-Block Building, Brisbane 2000, QLD, Australia.

Carbohydrate Polymers
|February 16, 2016
PubMed
Summary
This summary is machine-generated.

Aconitic acid (AcA) enhances starch films by acting as a cross-linking and plasticizing agent. Optimal cross-linking was observed at 5wt% AcA, improving film solubility and swelling.

Keywords:
Aconitic acidAconitic acid (PubChem CID: 444212)Cross-linkElastomerGlycerol (PubChem CID: 753)SolubilityStarchStarch (PubChem CID: 24836924)

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biomaterials

Background:

  • Starch-based films are biodegradable but often lack desirable mechanical and physical properties.
  • Enhancing starch film characteristics is crucial for expanding their applications.

Purpose of the Study:

  • To investigate the impact of aconitic acid (AcA) on the properties of starch/glycerol films.
  • To evaluate AcA's dual role as a cross-linking and plasticizing agent.

Main Methods:

  • Starch/glycerol films were prepared with varying concentrations of AcA (0-15 wt%).
  • Properties analyzed included solubility, swelling coefficient, elongation at break, tensile strength, and thermal stability.

Main Results:

  • Aconitic acid effectively cross-linked starch films, with 5wt% AcA showing the lowest solubility (28wt%) and reduced swelling.
  • Significant plasticization was observed, with 15wt% AcA increasing film elongation at break by approximately 35 times.
  • Increased AcA content generally led to reduced tensile strength, film softening, and decreased thermal stability.

Conclusions:

  • Aconitic acid acts as both a cross-linking and plasticizing agent in starch films.
  • The concentration of AcA is critical in balancing cross-linking and plasticization effects.
  • AcA shows potential for modifying starch film properties, though trade-offs in mechanical and thermal stability exist.