Emulsions and Foams (Berkman, Sophia; Egloff, Gustav)

Emulsions , Microemulsions and Foams ( Part IV )

Osmotic Stabilisation of Concentrated Emulsions and Foams

In the absence of coalescence, coarsening of emulsions (and foams) is controlled by molecular diffusion of the dispersed phase species from one emulsion droplet (or foam bubble) to another. Previous studies of dilute emulsions have shown how the osmotic pressure of a trapped species within droplets can overcome the Laplace pressure differences that drive coarsening, and " osmotically stabilise ...

Viscous friction in foams and concentrated emulsions under steady shear.

We present a model for the viscous friction in foams and concentrated emulsions, subject to steady shear flow. First, we calculate the energy dissipated due to viscous friction inside the films between two neighboring bubbles or drops, which slide along each other in the flow. Next, from this energy we calculate the macroscopic viscous stress of the sheared foam or emulsion. The model predictio...

Electrical resistance tomography for monitoring emulsions and foams

There are several techniques available for monitoring emulsions and foams. Early studies usually referred to global measurement of the volumes of the emulsion/foam and of the separated liquid versus time. However, it was soon understood that phase separation is not only a function of time but also of location. With regard to simplicity and fast response, electrical measurements offer a tempting...

Pickering stabilization of foams and emulsions with particles of biological origin

a North Carolina State University, Department of Chemical and Biomolecular Engineering, 911 Partners Way, Engineering Building 1, Rm 2-009, Raleigh NC 27695-7905, United States b Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands c Unilever R&D Vlaardingen, Olivier van Noortlaan 120, 3133 AT Vlaardingen, The N...