Abstract
The effect of surface treatment on the properties of granules of fine TiO2 powders treated with water vapor and agglomerated by Pressure Swing Granulation was investigated. It was found that when the number of OH groups and water molecules on the powder surface was increased, the cohesive force between the particles became stronger, and large granules were obtained. Furthermore, the value of cohesive force between the particles in this study was close to the value of van der Waals force calculated based on the assumptions that the distance between particles is 1.5-4.0Å and that the force includes the polarity effect of the adsorbed water molecules.
