Tuning the rheological behavior of colloidal gels through competing interactions
arXiv:2003.07607 · doi:10.1103/PhysRevMaterials.4.045601
Abstract
We study colloidal gels formed by competing electrostatic repulsion and short-range attraction by means of extensive numerical simulations under external shear. We show that, upon varying the repulsion strength, the gel structure and its viscoelastic properties can be largely tuned. In particular, the gel fractal dimension can be either increased or decreased with respect to mechanical equilibrium conditions. Unexpectedly, gels with stronger repulsion, despite being mechanically stiffer, are found to be less viscous with respect to purely attractive ones. We provide a microscopic explanation of these findings in terms of the influence of an underlying phase separation. Our results allow for the design of colloidal gels with desired structure and viscoelastic response by means of additional electrostatic interactions, easily controllable in experiments.
References in corpus (23)
- Colloidal Gels: Equilibrium and Non-Equilibrium Routes
- Equilibrium cluster phases and low-density arrested disordered states: The role of short-range attraction and long-range repulsion
- Dynamical Arrest in Attractive Colloids: The Effect of Long-Range Repulsion
- A random critical point separates brittle and ductile yielding transitions in amorphous materials
- The yielding transition in amorphous solids under oscillatory shear deformation
- Rheological hysteresis in soft glassy materials
- Colloidal systems with competing interactions: from an arrested repulsive cluster phase to a gel
- Modeling Equilibrium Clusters in Lysozyme Solutions
- Elasticity of arrested short-ranged attractive colloids: homogeneous and heterogeneous glasses
- Simulation study of Non-ergodicity Transitions: Gelation in Colloidal Systems with Short Range Attractions
- Gelation as condensation frustrated by hydrodynamics and mechanical isostaticity
- Colloidal Gels Tuned by Oscillatory Shear
- Structural and dynamical features of multiple metastable glassy states in a colloidal system with competing interactions
- Shear Thickening and Scaling of the Elastic Modulus in a Fractal Colloidal System with Attractive Interactions
- Competing interactions in arrested states of colloidal clays
- Shear yielding and shear jamming of dense hard sphere glasses
- On the Strength of Glasses
- Liu-Nagel phase diagrams in infinite dimension
- Rheology of colloidal microphases in a model with competing interactions
- On the effect of the thermostat in non-equilibrium molecular dynamics simulations
- Local structure of percolating gels at very low volume fractions
- Assessing numerical methods for molecular and particle simulation
- Rheological investigation of gels formed by competing interactions: A numerical study
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- Tuning local microstructure of colloidal gels by ultrasound-activated deformable inclusions
- Crosslinker mobility governs fracture behavior of catch-bonded networks
- Structural, mechanical, and vibrational properties of particulate physical gels
- Decoupling Structure and Elasticity in Colloidal Gels Under Isotropic Compression