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Stable water based magnetic rheologic liquid, and preparation method

A magnetorheological fluid, water-based technology, applied in magnetic fluids, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problems of easy oxidative deterioration and agglomeration, poor suspension stability, etc., and achieves simple and cost-effective preparation methods. Low, good antioxidant effect

Inactive Publication Date: 2007-05-09
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 water-based magnetorheological fluid and its preparation method, which overcomes the disadvantages of poor suspension stability of magnetic particles in water, easy oxidative deterioration and agglomeration, and the magnetorheological fluid provided has good anti- Oxidation performance, anti-sedimentation stability, good magnetorheological effect

Method used

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  • Stable water based magnetic rheologic liquid, and preparation method
  • Stable water based magnetic rheologic liquid, and preparation method
  • Stable water based magnetic rheologic liquid, and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The preparation of 100g water-based magnetorheological fluid, its preparation steps are:

[0036] Step 1, the chelating type surfactant N-polyoxyethylene (10) ether group ethylenediamine triacetate sodium of 2g (2%) is added in 20g (20%) water, stirred and mixed 3 hours at room temperature, obtained water Base compound carrier liquid;

[0037] Step 2. Add 75g (75%) carbonyl iron powder with an average particle size of 1 to 5 microns to the water-based composite carrier liquid obtained in Step 1, and stir and mix at room temperature for 3 hours to obtain a suspension;

[0038] Step 3, adding 0.3g (0.3%) surfactant N-lauroyl ethylenediamine triacetate sodium to the suspension obtained in step 2, stirring and mixing at room temperature for 3 hours to obtain a suspension;

[0039] Step 4, adding 0.5g (0.5%) antioxidant sodium nitrite to the suspension obtained in step 3, stirring and mixing at room temperature for 2 hours;

[0040] Step 5, adding 0.2g (0.2%) of the pH reg...

Embodiment 2

[0051] The preparation of 100g water-based magnetorheological fluid, its preparation steps are:

[0052] Step 1, adding 3g (3%) of chelating surface-active N-polyoxypropylene (10) ether group ethylenediamine triacetic acid into 14g (14%) of water, stirring and mixing at room temperature for 3 to 5 hours to obtain water Base compound carrier liquid;

[0053] Step 2. Add 80g (80%) of reduced iron powder with an average particle size of 1 to 10 microns to the water-based composite carrier liquid obtained in step 1, and stir and mix at room temperature for 4 hours to obtain a water-based magnetorheological fluid. initial sample;

[0054] Step 3, adding 0.3g (0.3%) surfactant sodium dodecylbenzenesulfonate to the initial sample of the water-based magnetorheological fluid obtained in step 2, stirring and mixing at room temperature for 3 hours to obtain a suspension;

[0055] Step 4, adding 0.2g (0.2%) antioxidant sodium benzoate to the suspension obtained in step 3, stirring and m...

Embodiment 3

[0067] The preparation of 100g water-based magnetorheological fluid, its preparation steps are:

[0068] Step 1. Add 2g (2%) of chelating surface-active N-p-sulfonic acid phenyl polyoxyethylene (5) ether ethylenediamine triacetic acid into 10g (10%) of water, stir and mix at room temperature for 3~ After 5 hours, the water-based composite carrier solution was obtained;

[0069] Step 2. Add 85g (85%) of iron-cobalt alloy particle magnetic particles with an average particle size of 1 to 10 microns to the water-based composite carrier liquid obtained in step 1, and stir and mix at room temperature for 5 hours to obtain a water-based magnetic flux The initial sample of the liquid;

[0070] Step 3, adding 0.3g (0.3%) surfactant Tween 80 to the initial sample of the water-based magnetorheological fluid obtained in step 2, stirring and mixing at room temperature for 3 to 5 hours to obtain a suspension;

[0071] Step 4, adding 0.7g (0.7%) antioxidant ethanolamine phosphate to the su...

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Abstract

The magnetic rheologic liquid is composed of following components according to portions of mass: magnetic particles 60-90 portions, water based compound assorted carrier liquid 10-40 portions, additive 1-10 portions. The said magnetic particles include ferrocarbonyl powder, reduced iron powder, iron cobalt alloy particles, or ferrite particles with mean grain size 1-10 micro. The water based compound assorted carrier liquid includes following materials according to mass percent: water 70%-90%, and chelation type surfactant 10%-30%. The surfactant includes following components according to percents of total mass of magnetic rheologic liquid: 0.05-2% thixotropic agent, 0.1%-1% antioxidant, 1%-3% antiwear additive, 0.1%-1% pH value regulator, and 0.1%-1% surfactant. Features are: better magnetic rheologic effect, and better standing stability. The magnetic rheologic liquid is applicable to polishing process, civil engineering, and damper for cars.

Description

Technical field: [0001] The invention relates to a magnetorheological fluid and a preparation method thereof, in particular to a stable water-based magnetorheological fluid and a preparation method thereof. Background technique: [0002] Magnetorheological finishing (MRF) is an advanced optical polishing technology developed in the past ten years, which can realize high-precision quantitative polishing of different polishing areas of processing components, so that the surface roughness can reach sub-nanometer level. One of the important key technologies to realize magnetorheological polishing technology is the preparation technology of magnetorheological fluid. Among various magnetorheological fluids, water-based magnetorheological fluid has the following advantages: 1. The base fluid has good wettability and non-toxicity to the surface of the processing element, and water can promote the hydrolysis of the surface of the polishing material; 2. Zero magnetic field Low viscos...

Claims

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Application Information

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IPC IPC(8): H01F1/44H01F41/00
Inventor 程海斌张清杰高为鑫王金铭赵文俞袁润章
Owner WUHAN UNIV OF TECH
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