In fact, the addition of dispersant can change the suspension viscosity. When the dispersant content is lower (0.25 wt.%), it LY2584702 could not reach the saturation adsorption on particle surface. The repulsive force between particles is weaker due to the lower charge density and thinner double electrical layers. But the Van der Waals force is stronger due to the higher viscosity. The suspension is only partly in decondensation state and has poor stability.