Nonlinear rheology of complex fluid-fluid interfaces

L.M.C. Sagis, P. Fischer

Research output: Contribution to journalArticleAcademicpeer-review

72 Citations (Scopus)

Abstract

Fluid–fluid interfaces stabilized by proteins, protein aggregates, polymers, or colloidal particles, tend to have a complex microstructure. Their response to an applied deformation is often highly nonlinear, even at small deformation (rates). The nonlinearity of the response is a result of changes in the interfacial microstructure. Most of the studies on interfacial rheology of complex interfaces currently available in the scientific literature, focus on the linear response regime. Since multiphase systems such as emulsions or foam are routinely exposed to large and fast deformations, characterization of the nonlinear response of complex interfaces is highly relevant. In this paper we review the recent work on nonlinear rheology of complex interfaces, both in shear and dilatational deformations. We also discuss several methods currently available for analyzing nonlinear interfacial rheology data, and recent progress in modeling nonlinear interfacial rheology, using nonequilibrium thermodynamic frameworks.
Original languageEnglish
Pages (from-to)520-529
JournalCurrent Opinion in Colloid and Interface Science
Volume19
Issue number6
DOIs
Publication statusPublished - 2014

Keywords

  • fourier-transform rheology
  • air-water-interface
  • extended irreversible thermodynamics
  • adsorbed protein layers
  • surface shear rheology
  • langmuir monolayers
  • liquid interfaces
  • adsorption layers
  • amyloid fibrils
  • nonequilibrium thermodynamics

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