three_component_model

Three component model for the rheology of soft glassy materials

Abstract

We test the validity of the Three Component model [1], describing the flow behavior of soft glassy materials, on carbomer microgel yield stress materials. To highlight the importance of the viscous contribution from the solvent, we formulate the carbomer yield stress materials using propylene glycol as continuous phase in place of water.We demonstrate that the contribution of the solvent viscosity captured by the background viscosity term in the TC model is relevant and follow the solvent’s Arrhenius dependence as a function of temperature.

Outline

• Microgel based yield stress fluids are often used as model system for soft glassy materials and yield stress fluids.
• We test the validity of the Three Component model [1], describing the flow behavior of soft glassy materials, on microgel yield stress materials.
• To test the importance of the viscous contribution from the solvent, we formulate the carbomer yield stress materials using propylene glycol as continuous phase in place of water.
• We demonstrate that the contribution of the solvent viscosity captured by the background viscosity term in the TC model is relevant and follow the solvent’s Arrhenius dependence as a function of temperature.
• Aknowledging the viscous contribution is important on several fronts. It solves a trivial, yet problematic, inconsistency of current approches which often imply a vanishing terminal viscosity at high shear. Enable quntitativly better fit of the data, especially at high shear. Solves inconsistencies in building mastercurves.
• We demonstrated that when choosing the model to describe the rheology for soft glassy materials, even in the case of microgel based system, it is important to select a model that includes a non zero teminal viscosity such as the three component model.

Figures:

• [x] Meta analysis literature data (marco julie)

• [x] Choice of volume fraction - Just above jamming (manon)

  • Add right subplot with infinite viscosity vs. cp concentration

• [x] Flow curves vs Temperature (yield stress not change but solvent viscosity has an effect)

  • Inset solvent viscosity vs temp (manon)

• [ ] TC model on one flow curve - possible comparison with HB - AIC, Chisquare (marco julie)

  • exponent HB as function of temperature. Should we add residuals?

• [ ] TC parameters vs temperature (manon)

  • Just use previous figure samples
  • check guide to eyes flat on ys
  • Inset crit shear rate vs infinite viscosity

• [x] Master curve for all data presented - rescaled by alligning Bi=1 (manon)

TODO list

• [ ] check polyacrilamide sample (marco)
• [x] add flow curves to the database (manon)
• [x] create overleaf project

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