Related Experiment Video
Updated: Feb 12, 2026
06:31
Studying Surfactant Effects on Hydrate Crystallization at Oil-Water Interfaces Using a Low-Cost Integrated Modular Peltier Device
Published on: March 18, 2020
6.8K
Shear and Surfactant-Assisted Breakdown and Recovery of a Particle-Stabilized Oil-Water Interface
Malek El-Aooiti1, Dérick Rousseau1
1Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, Ontario M5B 2K3, Canada.
Langmuir : the ACS Journal of Surfaces and Colloids
|February 11, 2026
Summary
This study shows particle-stabilized emulsions can recover their structure after shear. However, structure-breaking surfactants permanently weaken the interfacial film, impacting emulsion stability and breakdown properties.
Area of Science:
- Colloid and Surface Science
- Materials Science
- Rheology
Background:
- Particle-stabilized emulsions are vital in food and petrochemical industries.
- The stability of these emulsions relies heavily on the particle layer at the interface.
- Understanding interfacial rheology is key to controlling emulsion breakdown.
Purpose of the Study:
- To investigate the rheological breakdown and recovery of particle films under shear.
- To determine the impact of structure-breaking surfactants on interfacial properties.
- To correlate interfacial changes with emulsion stability.
Main Methods:
- Experiments on planar oil-water interfacial films using glycerol monostearate (GMS) crystals.
- Application of varying shear conditions to assess film response.
- Addition of sorbitan monooleate (SMO) surfactant to evaluate its effects.
Main Results:
- Interfacial films showed reversible transitions between elastic and viscous states based on strain.
- Sorbitan monooleate (SMO) permanently reduced interfacial elastic modulus (G') and tension.
- Shearing weakened films resulted in irreversible loss of viscoelastic properties.
Conclusions:
- Particle-stabilized interfaces can recover G' after shear, but surfactants can cause irreversible changes.
- Structure-breaking surfactants destabilize emulsions by altering interfacial viscoelasticity.
- Findings aid in designing emulsions with tunable breakdown characteristics.
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