Rheology of Attractive Emulsions

Abstract

We show how attractive interactions dramatically influence emulsion rheology. Unlike the repulsive case, attractive emulsions below random close packing, RCP, can form soft gel-like elastic solids. However, above RCP, attractive and repulsive emulsions have similar elasticities. Such compressed attractive emulsions undergo an additional shear-driven relaxation process during yielding. Our results suggest that attractive emulsions begin to yield at weak points through the breakage of bonds, and, above RCP, also undergo droplet configurational rearrangements.

References in corpus (4)

• Close packing density of polydisperse hard spheres
• Strain-Rate Frequency Superposition (SRFS) - A rheological probe of structural relaxation in soft materials
• Yielding and flow in adhesive and non-adhesive concentrated emulsions
• Scaling Theory for Steady State Plastic Flows in Amorphous Solids

Cited by in corpus (9)

• Yield Stress Materials in Soft Condensed Matter
• Timescales in creep and yielding of attractive gels
• Impact of attractive interactions on the rheology of dense athermal particles
• Time dependence in large amplitude oscillatory shear: a rheo-ultrasonic study of fatigue dynamics in a colloidal gel
• Softening and Yielding of Soft Glassy Materials
• Direct Imaging of Contacts and Forces in Colloidal Gels
• Depletion attraction favors the elastic response of emulsions flowing in a constriction
• Rheology primer for nanoparticle scientists
• Stiffening attractive suspensions with solid inclusions or granularity effect in loaded colloidal gels