Dilational Rheology of Fluid/Fluid Interfaces: Foundations and Tools

Shear and dilational interfacial rheology of surfactant-stabilized droplets.

A new measurement method is suggested that is capable of probing the shear and dilational interfacial rheological responses of small droplets, those of size comparable to real emulsion applications. Freely suspended aqueous droplets containing surfactant and non-surface-active tracer particles are transported through a rectangular microchannel by the plane Poiseuille flow of the continuous oil ...

Rheology of Mobile Interfaces

This review discusses the rheology of interfaces that separate two, immiscible fluids. Unlike interfaces at the fluid/solid boundary, these surfaces are mobile and deform. In the presence of amphiphiles that collect at these interfaces, they can become highly structured and non-Newtonian. These nonlinear responses to flow have profound implications on many physical processes and examples can be...

Dynamics of complex interfaces. I. Rheology, morphology, and diffusion

In this paper, we investigate, on two levels of description, the isothermal coupling: ~i! between rheology and morphology in immiscible blends ~A/B! and ~ii! among rheology, morphology, and diffusion in mixtures consisting of an immiscible blend ~A/B! and one simple fluid, s. The interface separating the phases A and B is described, on the kinetic level by an area density distribution function ...

Interfacial Rheology of Gas/Liquid and Liquid/Liquid Interfaces

An interfacial shear rheometer for stressand strain-controlled measurements at liquid interfaces is outlined. Experimental data are reported for the surfactant sorbitan tristearate on κ-carrageenan subphases. A setup combining interfacial rheometry with Brewster-angle Microscopy for realtime imaging of the interface is presented. INTRODUCTION Dynamic processes involving deformable fluid interfa...

Dilatational Rheology and Controlled Generation of Microscale Complex Fluid Interfaces