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Gelation in Oleogels: A Rheological Framework for Soft Material Formulation.

Shrajesh Patel1, Kalyani Agarwal1, Sumanth Arnipally2

  • 1Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India.

Langmuir : the ACS Journal of Surfaces and Colloids
|May 27, 2026
PubMed
Summary
This summary is machine-generated.

This study validates critical gelation theory for beeswax-corn oil oleogels, revealing how wax crystal networks dictate their properties. Findings offer a predictive framework for formulating oleogels with tunable mechanical stiffness and thermal durability.

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Area of Science:

  • Materials Science
  • Physical Chemistry
  • Rheology

Background:

  • Oleogels from natural waxes exhibit a sol-gel transition upon cooling, driven by crystalline network formation.
  • The interfacial properties of wax crystals significantly influence the bulk viscoelastic behavior of oleogels.
  • Critical gelation theory has not been previously applied to understand this sol-gel transition in wax-based oleogels.

Purpose of the Study:

  • To investigate the sol-gel transition in beeswax-corn oil oleogels using critical gelation theory.
  • To establish a unified linear viscoelastic description for the sol-gel transition in these oleogels.
  • To develop a framework for manipulating oleogel properties for specific applications.

Main Methods:

  • Detailed linear viscoelastic analysis under oscillatory shear flow.
  • Temperature-dependent dynamic moduli measurements.
  • Analysis of scaling relations and fractal dimensions.

Main Results:

  • Identified a critical gel state characterized by frequency-independent dynamic moduli.
  • Validated critical gelation theory through hyperscaling relations of scaling exponents.
  • Quantified the impact of wax concentration on fractal dimension and gel strength.

Conclusions:

  • This study provides the first comprehensive validation of critical gelation theory for wax-based oleogels.
  • A predictive framework for oleogel formulation and processing near the gel point is established.
  • A design framework for tuning oleogel mechanical stiffness and thermal durability is presented.