Interfacial fluid rheology of soft particles

Abstract

In situ interfacial rheology and numerical simulations are used to investigate microgel monolayers in a wide range of packing fractions, ${\zeta }_{2D}$. The heterogeneous particle compressibility determines two flow regimes characterized by distinct master curves. To mimic the microgel architecture and reproduce experiments, an interaction potential combining a soft shoulder with the Hertzian model is introduced. In contrast to bulk conditions, the elastic moduli vary non-monotonically with ${\zeta }_{2D}$ at the interface, confirming long-sought predictions of reentrant behavior for Hertzian-like systems.

References in corpus (6)

• A new look at effective interactions between microgel particles
• Increasing the density melts ultrasoft colloidal glasses
• Resolving long-range spatial correlations in jammed colloidal systems using photon correlation imaging
• In-situ study of the impact of temperature and architecture on the interfacial structure of microgels
• Compression of colloidal monolayers at liquid interfaces: in situ vs. ex situ investigation
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Cited by in corpus (3)

• Softness Matters: Effects of Compression on the Behavior of Adsorbed Microgels at Interfaces
• Numerical study of neutral and charged microgel suspensions: from single-particle to collective behavior
• Soft ULC Microgels at the Interface Interact and Flow as Hertzian-Like Colloids