Journal
LANGMUIR
Volume 27, Issue 9, Pages 5204-5210Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la200021r
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The structural evolution and rheology of dense nanoemulsion gels, which have been formed by creating strong attractions between slippery nano-droplets, are explored as a function of steady shear rate using rheological small-angle neutron scattering (rheo-SANS). For applied stresses above the yield stress of the gel, the network yields, fracturing into aggregates that break and reform as they tumble and interact in the shear flow. The average aggregate size decreases with increasing shear rate; meanwhile, droplet rearrangements within the clusters, allowed by the slippery nature of the attractive interaction, increase the local density within the aggregates. At the highest shear rates, all clusters disaggregate completely into individual droplets.
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