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Related Experiment Video

Updated: Jun 9, 2026

Combining Microfluidics and Microrheology to Determine Rheological Properties of Soft Matter during Repeated Phase Transitions
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Combining Microfluidics and Microrheology to Determine Rheological Properties of Soft Matter during Repeated Phase Transitions

Published on: April 19, 2018

Interfacial rheology through microfluidics.

Jeffrey D Martin1, Joie N Marhefka, Kalman B Migler

  • 1Complex Fluids Group, Polymers Division, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, MD 20899-8542, USA. jeffrey.martin@unilever.com

Advanced Materials (Deerfield Beach, Fla.)
|August 28, 2010
PubMed
Summary
This summary is machine-generated.

This study uses microfluidics to measure interfacial rheology in emulsions, revealing how surfactant movement affects flow dynamics at relevant scales. Findings provide insights into emulsion properties crucial for industrial applications.

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Area of Science:

  • Fluid Dynamics
  • Colloid and Surface Science
  • Materials Science

Background:

  • Interfacial rheology significantly influences emulsion properties.
  • Traditional methods lack relevance to industrial processing scales.
  • Surfactant mass transfer and flow coupling are key factors.

Purpose of the Study:

  • To develop and utilize a microfluidic platform for measuring interfacial rheology at application-relevant length scales.
  • To investigate the coupling between interfacial tension, interfacial retardation, and surfactant mass transfer.
  • To measure mass transfer coefficients and interfacial mobility in diffusing surfactant systems.

Main Methods:

  • Employed a microfluidic device for high-throughput experimentation on two-phase droplet flows.
  • Measured interfacial tension and droplet internal circulation velocity using particle tracers.
  • Quantified interfacial mobility and mass transfer coefficients.

Main Results:

  • Demonstrated a microfluidic approach for simultaneous measurement of interfacial tension and mobility.
  • Quantified surfactant mass transfer coefficients and interfacial mobility.
  • Showcased the device's capability to probe deformability of elastic capsules and biological cells.

Conclusions:

  • Microfluidics enables precise characterization of interfacial rheology at relevant scales.
  • Understanding surfactant mass transfer is critical for controlling emulsion properties.
  • The developed platform is versatile for studying interfacial phenomena and material deformability.