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Enhancement of Starch Gel Properties Using Ionic Synergistic Multiple Crosslinking Extrusion Modification.

Wenguang Wei1, Min Wu1, Tianqi Zhang1

  • 1College of Engineering, China Agricultural University, No. 17 Qinghua East Road, Haidian District, Beijing 100083, China.

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Summary

A novel synergistic multiple crosslinking method using calcium ions (Ca2+) enhances food-grade starch gel properties. This approach significantly improves elastic modulus and deformation resistance in modified starch gels.

Keywords:
cationic synergisticextrusionmultiple crosslinkingrheological propertiesstarch modification

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Area of Science:

  • Food Science
  • Materials Science
  • Polymer Chemistry

Background:

  • Starch gels are widely used but their properties are limited by single crosslinking methods.
  • Poor crosslinking efficiency of single agents restricts applications in starch gel modification.

Purpose of the Study:

  • To develop a synergistic multiple crosslinking method for improved starch gel properties.
  • To investigate the impact of Ca2+ in enhancing starch gel crosslinking.

Main Methods:

  • Developed a Ca2+ synergistic multiple crosslinking modification method for starch.
  • Evaluated rheological properties (elastic modulus, deformation resistance) using advanced techniques.
  • Characterized microstructure and molecular forces via SEM, XPS, FTIR, and XRD.

Main Results:

  • The modified starch (SC-Ca-N3) exhibited a 79% increase in elastic modulus (G') compared to unmodified starch (SC-N).
  • Synergistically crosslinked gels demonstrated superior resistance to deformation.
  • Analysis confirmed the involvement of multiple molecular forces in the synergistic crosslinking.

Conclusions:

  • The Ca2+ synergistic multiple crosslinking method effectively improves starch gel properties.
  • This technique offers a promising approach for tailoring starch gel characteristics for various applications.