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Stable silicone oil based magnetic rheologic liquid, and preparation method

A technology of magnetorheological fluid and silicone oil, applied in magnetic fluid, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problems of poor suspension stability, easy oxidative deterioration and agglomeration, and achieve low cost and anti-oxidation. Good and significant magnetorheological effect

Inactive Publication Date: 2009-01-21
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a stable silicone oil-based magnetorheological fluid and its preparation method, which overcomes the disadvantages of poor suspension stability of magnetic metal particles in silicone oil, easy oxidative deterioration and agglomeration, and the magnetorheological fluid provided has good Excellent antioxidant properties, anti-friction properties, and good thixotropy

Method used

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  • Stable silicone oil based magnetic rheologic liquid, and preparation method
  • Stable silicone oil based magnetic rheologic liquid, and preparation method
  • Stable silicone oil based magnetic rheologic liquid, and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Prepare 100g of silicone oil-based magnetorheological fluid, the preparation steps are:

[0037] Step 1, adding 2g (2%) surfactant sodium dodecylbenzenesulfonate to 20g (20%) silicone oil, stirring and mixing at room temperature for 3 hours to obtain a mixture;

[0038] Step 2, adding 0.5g (0.5%) antioxidant sodium nitrite to the mixture obtained in step 1, stirring and mixing at room temperature for 3 hours to obtain the mixture;

[0039] Step 3, adding 0.5g (0.5%) thixotropic agent nano magnesium lithium silicate to the mixture obtained in step 2, stirring and mixing at room temperature for 3 hours to obtain the mixture;

[0040] Step 4, adding 2g (2%) antiwear graphite to the mixture obtained in step 3, and stirring and mixing at room temperature for 4 hours to obtain a silicone oil-based compound liquid carrier liquid;

[0041] Step 5. Add 75g (75%) of N-hexadecylethylenediaminetriacetic acid / carbonyl iron core-shell magnetic composite particles (with a particle si...

Embodiment 2

[0050] Prepare 100g of silicone oil-based magnetorheological fluid, the preparation steps are:

[0051] Step 1, adding 3g (3%) surfactant oleic acid into 15g (15%) silicone oil, stirring and mixing at room temperature for 4 hours to obtain a mixture;

[0052] Step 2, adding 0.3g (0.3%) antioxidant sodium benzoate to the mixture obtained in step 1, stirring and mixing at room temperature for 2 hours to obtain the mixture;

[0053] Step 3, adding 0.7g (0.7%) thixotropic polysaccharide to the mixture obtained in step 2, stirring and mixing at room temperature for 4 hours to obtain the mixture;

[0054] Step 4, adding 1g (1%) anti-wear agent nano-alumina powder to the mixture obtained in step 3, stirring and mixing at room temperature for 2 hours, to obtain a silicone oil-based compound carrier liquid;

[0055] Step 5. Add 80g (80%) of N-hexadecylethylenediaminetriacetic acid / carbonyl iron core-shell magnetic composite particles (with a particle size of 1 to 100 microns) to the s...

Embodiment 3

[0064] Prepare 100g of silicone oil-based magnetorheological fluid, the preparation steps are:

[0065] Step 1. Add 2g (2%) surfactant sodium polyether benzene sulfonate to 11g of silicone oil, stir and mix at room temperature for 3 hours to obtain a mixture;

[0066] Step 2, adding 0.2g (0.2%) antioxidant ethanolamine phosphate to the mixture obtained in step 1, stirring and mixing at room temperature for 2 hours to obtain the mixture;

[0067] Step 3, adding 0.3g (0.3%) thixotropic agent cellulose derivative to the mixture in step 2, stirring and mixing at room temperature for 2 hours to obtain the mixture;

[0068] Step 4. Add 1.5g (1.5%) anti-wear agent nano cerium oxide powder to the mixture obtained in step 3, and stir and mix at room temperature for 3 hours to obtain a silicone oil-based composite carrier liquid;

[0069] Step 5. Add 85g (85%) N-lauroyl ethylenediamine triacetic acid / carbonyl iron core-shell magnetic composite particles (with a particle size of 1 to 10...

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Abstract

The magnetic rheologic liquid is composed of components: chelation type surfactant / carbonyl iron hull type magnetic compound particles, and silicone oil based compound assorted carrier liquid prepared from silicone oil and additive. The additive includes thixotropic agent, antioxidant, antiwear additive, and surfactant. The method for preparing the liquid includes steps: mixing round surfactant being added to silicone oil; next, adding antioxidant, thixotropic agent, and antiwear agent, then mixing them to obtain silicone oil based compound assorted carrier liquid; adding magnetic compound particles to the carrier liquid, and after procedures of mixing, ballmilling, and separating out friction balls, then sealing the liquid inside plastic bottle; stable silicone oil based magnetic rheologic liquid is obtained after series of procedure: placing the plastic bottle in magnetic field, taking out the liquid, and mixing etc. The liquid is applicable to damper, variator for cars etc.

Description

technical field [0001] The invention relates to a magnetorheological fluid and a preparation method thereof, in particular to a stable silicone oil-based magnetorheological fluid and a preparation method thereof. technical background [0002] Magnetorheological fluid is a suspension formed by dispersing magnetizable particles in a non-magnetic liquid (usually called base fluid). It has an important characteristic: in the presence of a magnetic field, the apparent viscosity of the magnetorheological fluid is proportional to the strength of the magnetic field, and its change can reach tens of thousands of times, and this change is fast and reversible. called the magnetorheological effect. Using this characteristic, many new devices and new instruments can be designed and manufactured, such as magnetorheological dampers, magnetorheological shock absorbers for automobiles, magnetorheological transmissions and magnetorheological brakes, magnetorheological sealing devices, magnet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/44H01F41/00
Inventor 程海斌张剑高为鑫张清杰王金铭袁润章
Owner WUHAN UNIV OF TECH
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