A Dewetting Model for Double-Emulsion Droplets

A Dewetting Model for Double-Emulsion Droplets

Blog Article

The evolution of double-emulsion droplets is of great importance for the application of microdroplets and microparticles.We study the driving force of the dewetting process, the equilibrium configuration and the dewetting time of double-emulsion droplets.Through energy analysis, we find that the equilibrium configuration of a partial engulfed droplet depends on a dimensionless interfacial tension determined by the three relevant interfacial tensions, and the engulfing part of the Running Board inner phase becomes larger as the volume of the outer phase increases.

By introducing a dewetting boundary, the dewetting time can be calculated by balancing the driving force, caused by interfacial tensions, and the viscous force.Without considering the momentum change of the continuous phase, the dewetting time is an increasing function against the viscosity of the outer phase and the volume ratio between the outer phase TOWEL and inner phase.