Preparation And Electrorheological Performance Of Compound Surfactant Modilfied Titanium Oxide Particles

ER fluid (Electrorheological fluid ERF) is a suspension system of nano-or micron dielectric particles and insulating liquid mixture. The rheological behavior of the ER fluid: viscosity, shear stress to achieve rapid and continuous, reversible adjustment within a certain range under an applied electric field. It has broad application prospects in engineering technology, such as shock absorbers, dampers and other mechanical and electrical conversion, artificial joints. However, the lack of performance of the ER fluid material, such as poor stability, low shear strength, power consumption, complex preparation method and other factors severely restricted the industrial application of ER technology. ER mechanism is not clear and it also restricted the in-depth study of ER materials.Within the above problems, this paper prepared the Gly-TiO ER particles, through the different types of surface-active agent modification of the ER particles to research the performance of modified Gly-TiO ER fluid, and the best amount added of the modifier; to select a best modification effect of sodium dodecylbenzenesulfonate (SDBS), hydrothermal method, precipitation method were used to prepared modified Gly-TiO ER fluids, by comparing the ER performance to find out how the different modification process effect on ER particles; simultaneously investigated the power consumption, temperature stability, stability over time, shear stability, thixotropy of the surfactant SDBS modified Gly-TiO particles ER system. The following conclusions:SDBS and glycerol composite modified have a greater impact on Gly-TiO ER fluid mechanical properties, there is an optimum amount of modified add, beyond the optimum amount, the ER fluid mechanical performance degradation. As the amount of SDBS dosage, the SDBS-Gly-TiO ER fluid leakage current density increases cyclical variation; the sendimentation of SDBS composite modified Gly-TiO ER fluid have improved to some extent, its stability have meet the application requirements of ER fluid. By comparing the performance of different modification process of ER fluids, it shows that precipitation method was better performance of ER fluids.Stearic acid and glycerol composite ER particles of titanium oxygen system modification, can improve the mechanical properties of Gly-TiO ER fluid, but also there is an optimum amount of modified dosage, this amount can be added to achieve the best mechanical properties and the minimum leakage current density. The sendimentation of stcaric acid composite modified Gly-TiO ER fluid have improved to some extent.