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Passive Microrheology for Measurement of the Concentrated Dispersions Stability

  • Christelle Tisserand
  • Mathias Fleury
  • Laurent Brunel
  • Pascal Bru
  • Gérard Meunier
Conference paper
Part of the Progress in Colloid and Polymer Science book series (PROGCOLLOID, volume 139)

Abstract

This work presents a new technique of passive microrheology for the study of the microstructural properties of soft materials such as emulsions or suspensions. This technology uses Multi Speckle Diffusing Wave Spectroscopy (MS-DWS) set-up in a backscattering configuration with video camera detection. It measures the mean displacement of the microstructure particles in a spatial range between 0.1 and 100 nm and a time scale between 10−2 and 105 s. Different parameters can be measured or obtained directly from the Mean Square Displacement (MSD) curve, including a fluidity index, a solid–liquid balance, an elasticity index, a viscosity index, a relaxation time and a MSD slope.

Using this technique the evolution of the microstructure, the restructuring after shearing and the variation of the viscoelastic properties with temperature or pH can be measured allowing the physical stability of emulsions or suspensions to be forecasted.

This work focuses on the evolution of the viscoelastic properties of emulsions and suspensions to follow their stability over time and shows the advantages of using a non-invasive method to detect nascent destabilisation of the microstructure.

Keywords

Ageing Time Dynamic Light Scattering Mean Square Displacement Viscosity Index Potassium Sorbate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Christelle Tisserand
    • 1
  • Mathias Fleury
    • 1
  • Laurent Brunel
    • 1
  • Pascal Bru
    • 1
  • Gérard Meunier
    • 1
  1. 1.FormulactionL’UnionFrance

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