Magnetorheological fluid, and preparation method therefor and use thereof
By modifying the surface of magnetic particles by forming a polysiloxane coating, the stability and responsiveness of magnetorheological fluids were solved, resulting in a low-viscosity, high-yield-stress magnetorheological fluid suitable for vehicle shock absorption systems.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2025-09-30
- Publication Date
- 2026-06-04
AI Technical Summary
Existing magnetorheological fluids suffer from insufficient stability due to the easy sedimentation and aggregation of magnetic particles, and high zero-field viscosity, which limits their response capability under magnetic fields.
Magnetic particles with polysiloxane surface modification are used. A polysiloxane coating layer is formed on the surface of the magnetic particles through hydrolysis and dehydration condensation reaction, which improves particle dispersibility and anti-settling properties. Combined with base liquid and additives, a magnetorheological fluid with low zero-field viscosity and high shear yield stress is prepared.
It significantly improves the long-term stability and anti-settling properties of magnetorheological fluids, ensuring low viscosity at zero field and high shear yield stress under magnetic field, making it suitable for vehicle shock absorption systems and improving the performance and service life of the shock absorption system.
Smart Images
Figure CN2025126149_04062026_PF_FP_ABST