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Rheological and Micro-Rheological Properties of Chicory Inulin Gels.

Jingyuan Xu1, James A Kenar2

  • 1Plant Polymer Research, National Center for Agricultural Utilization Research, Agricultural Research Service, US Department of Agriculture, 1815 North University Street, Peoria, IL 61604, USA.

Gels (Basel, Switzerland)
|March 27, 2024
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Summary

Inulin concentration dictates its properties, transitioning from fluid-like to gel-like behavior at higher concentrations. This study reveals how to control inulin

Keywords:
diffusion wave spectroscopy (DWS)inulinmicro-rheologyrheology

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Area of Science:

  • Food Science
  • Materials Science
  • Polymer Science

Background:

  • Inulin, a soluble fiber from plants, has diverse food and non-food applications.
  • Understanding inulin's rheological properties is crucial for product development.

Purpose of the Study:

  • To investigate the rheological properties of inulin dispersions across various concentrations.
  • To determine the concentration-dependent transition from liquid to gel-like behavior in inulin.

Main Methods:

  • Mechanical rheometry to assess linear viscoelastic properties.
  • Diffusion Wave Spectroscopy (DWS) for high-frequency rheological analysis.
  • Non-linear steady shear experiments to evaluate shear-thinning behavior.

Main Results:

  • Inulin exhibits fluid-like behavior at 25 wt% and gel-like properties at concentrations ≥27.5 wt%.
  • Viscoelastic properties and moduli increase with inulin concentration.
  • Inulin gels demonstrate flexible polymer-like behavior, and shear-thinning increases with concentration.

Conclusions:

  • Inulin gel properties are tunable by adjusting concentration.
  • This research provides insights for designing inulin-based products for applications like wound healing materials.