A tri-dispersed phase magneto-rheological fluid with high stability and a preparation method thereof

By modifying the surface of magnetic powder with polymers and preparing polymer-coated iron(II) oxide and iron(II) oxide/inorganic composite materials, the problems of insufficient sedimentation stability and yield stress of magnetorheological fluids were solved, and a tridisperse phase magnetorheological fluid with high stability and high yield stress was realized, which is suitable for multiple fields.

CN114203385BActive Publication Date: 2025-11-11JILIN UNIVERSITY
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Patent Information

Application Number
CN202111523631.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-12-13
Publication Date
2025-11-11
Estimated Expiration
2041-12-13

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Abstract

The application discloses a kind of tri-dispersed phase magnetorheological fluid with high stability and preparation method thereof, belong to magnetorheological fluid technical field, according to mass percentage content is composed of following raw materials: magnetic powder @ polymer: 40-85wt%, ferroferric oxide @ polymer: 1-15wt%, ferroferric oxide / inorganic composite material: 0.01-2wt%, carrier liquid: 10-50wt%;Ferroferric oxide @ polymer has ultra-high sedimentation stability, greatly improves the suspension of magnetic powder, ferroferric oxide inorganic composite material is support structure, prevent magnetic powder aggregation, while both have strong magnetism, can enhance the yield stress of magnetorheological fluid.The application not only can improve magnetorheological fluid sedimentation stability, but also can enhance the yield stress of magnetorheological fluid, sedimentation stability 30 days can reach more than 99%, basically can realize no sedimentation, yield stress can reach more than 80kPa, far higher than traditional single-phase magnetorheological fluid.Meanwhile the preparation method of the application is simple, low in price, suitable for industrial production.
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Patent Citations

  • A bi-dispersed magnetorheological fluid and preparation method thereof

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