Abstract:
The report investigates the preparation and characterization of nanosilica-polyethylene glycol shear thickening films (STF). Using ethanol and acetone as diluent, nano-silica and polyethylene glycol produced by gas-phase method were used as raw materials. Different concentrations of shear-thickening fluids were prepared by mixing with mechanical stirrer and ultrasonic cleaner. The characteristics of shear thickening fluid, the change of shear thickening fluid under different conditions, the change characteristics of shear thickening fluid with different mass fractions, and the properties of nano-silica effect of mass fraction on shearing thickening. The results show that the formation of shear thickening dispersion system with the formation of a new chemical bond, but the shear thickening phenomenon is a physical phenomenon, no chemical reaction. Shear thickening is divided into four stages, namely:shear instability, shear thinning, shear thickening, again shear thinning stage, and the greater the mass fraction, the more obvious the effect of shear thickening.