Preparation and properties of nano electrorheological fluid of modified titanium oxide nano particle

Acrylamide modified titanium oxide nano particles were prepared by combining the modified hydrolysis and solution deposition methods, using sodium dodecylbenzene sulphonate (SDBS) as the dispersing agent. XRD result shows that the nano particles are amorphous, and the size dispersion ranges from 70 nm to 300 nm characterized by the laser particle size analyzer. FTIR patterns show that acrylamide and SDBS are adsorbed on the surface of titanium oxide particles. The addition of SDBS affects the size and the surface characterization of particles, and the wet-lability between particles and silicone oil, which sequentially leads to the improvement of dielectric property. An excellent electrorheological activity has been found when the nano particles are dispersed into the silicone oil. Under an electric field of 5 kV/mm, the shear stress will reach 90 kPa, when the mass fractions of acrylamide and SDBS are 1.875% and 0.750%, respectively. The ERF also shows very good dispersion stability.