Squeezing particle-stabilized emulsions into biliquid foams
Emulsions stabilized by colloidal particles rather than molecular surfactants are model arrested systems and promising precursors for energy materials. Here we investigate the bulk mechanical properties of water-in-oil emulsions stabilized by hard-sphere-like colloids via compression in a centrifuge, supporting our interpretation of the data with confocal microscopy. Our results reveal the dominant role of the liquid-liquid interface at the droplet surface in the rheology of these particle-stabilized emulsions. In addition to an elastic response, we find a plastic deformation, the origin of which remains unclear.
This is a weekly series of informal talks given primarily by members of the soft condensed matter and statistical mechanics groups, but is also open to members of other groups and external visitors. The aim of the series is to promote discussion and learning of various topics at a level suitable to the broad background of the group. Everyone is welcome to attend..