FLOW BEHAVIOUR AND RHEOLOGICAL ASSESMENT OF KAOLINITE/PDMS PASTES VIA CAPILLARY RHEOMETER

An improved understanding of the influence of some parameters such as solid:liquid ratio, particle size and temperature on the rheology of kaolinite/silicone oil AK 60 000 pastes is needed so that new application areas of this clay can be brought into existence. Kaolinite/PDMS paste forms were used to measure the rheological properties with high pressure capillary rheometer. All pastes were exhibited non-Newtonian, pseudoplastic shear-thinning behaviour under experimental conditions. The viscosity decreased with an increase in temperature and particle size and with a decrease in solid:liquid ratio. Herschel-Bulkley model is capable of predicting the extrusion behaviour of the whole pastes.