Abstract
In this paper, the relationship of rheological properties, particle size and particle size distribution of dispersed phase silica at different blending times during the preparation of STF was studied in detail. It is found that with the increase of blending time, the initial viscosity η0 of STF decreases, the critical shear rate γc increases, the maximum thickening viscosity ηm decreases, the thickening ratio decreases and the shear thickening effect of the system shows a weakening trend. On the other, the volume average particle size of silica decreases gradually and finally reaches a stable value. The particle size distribution changed from double-interval distribution to single-interval distribution. The variation of shear thickening properties with blending time was explained by combining Cluster and Jamming theory. It is considered that the preparation of STF can be completed when the suspension is transparent and has a uniform viscosity. It is believed that this will play an important role in improving the efficiency of STF preparation and will be of great help to realize industrialized production of STF in the future.
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