The rheological and dielectric properties of kaolinite suspensions in the presence of alcohols

The viscosity and dielectric properties of kaolinite dispersions were studi ed in water and water-alcohol mixtures. The dielectric constant decreases w ith increasing alcohol concentration. The relative apparent viscosity incre ases to a maximum and then decrease with increasing alcohol concentration. The increase of the viscosity is caused by face-to-edge interaction between the particles at the lower alcohol concentration on the other hand the vis cosity decreases again because, the kind of interaction between the particl es changes at higher alcohol concentration. The decrease of viscosity is ca used by face-to-face interaction.