to the decrease of zeta potential. The yield stress is a key parameter in production, determining the force required to fill a product into its container or to flow. The stress at the viscosity maximum, is a measure for the yield stress. The yield stress is 0.07 pa which it shows that small amount of force is required to flow.
(a) Viscosity vs. stress, (b) Viscosity vs. shear rate
Cross rheological model shear thinning model gives a good agreement with measured data. γ̇ is the shear
International Journal of Advanced Network, Monitoring and Controls , ISSUE 3, 9–15