Effect on the Sedimentation Stability of Magnetorheological Fluid by Micro-nano Composite System

In magnetorheological devices, the magnetorheological fluids are inevitably in a zero-field state when the MR device is out of work. Long-term placement will lead to the sedimentation of MR fluids, reducing the performance of the magnetorheological device. A novel magnetorheological fluid was prepared by mixing microparticles and nanoparticles to solve this problem. After one-week placement, the sedimentation rate of the novel magnetorheological fluid is only 0.23 %, decreased by 88.5 % compared with general magnetorheological fluid. The novel magnetorheological fluid shows excellent sedimentation stability, keeping magnetorheological devices in good condition.