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 p

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
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1:

[0035] For the preparation of 100g water-based magnetorheological fluid, the preparation steps are as follows:

[0036] Step 1. Add 2g (2%) of chelating surfactant N-polyoxyethylene (10) ether ethylenediamine triacetate sodium to 20g (20%) water, stir and mix for 3 hours at room temperature to obtain water Base compound carrier liquid;

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

[0038] Step 3. Add 0.3 g (0.3%) of the surfactant N-lauroyl ethylenediamine triacetate to the suspension obtained in step 2, and stir and mix for 3 hours at room temperature to obtain a suspension;

[0039] Step 4. Add 0.5 g (0.5%) of antioxidant sodium nitrite to the suspension obtained in step 3, and stir and mix for 2 hours at room temperature;

[0040] Step 5. Add 0.2g (0.2%) of the p...

Example Embodiment

[0050] Example 2:

[0051] For the preparation of 100g water-based magnetorheological fluid, the preparation steps are as follows:

[0052] Step 1. Add 3g (3%) of chelating surface active N-polyoxypropylene (10) ether ethylenediaminetriacetic acid to 14g (14%) of water, stir and mix for 3-5 hours at room temperature to obtain water Base compound carrier liquid;

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

[0054] Step 3. Add 0.3 g (0.3%) of surfactant sodium dodecylbenzene sulfonate to the initial sample of the water-based magnetorheological fluid obtained in step 2, and stir and mix for 3 hours at room temperature to obtain a suspension;

[0055] Step 4. Add 0.2 g (0.2%) of antioxidant sodium benzoate to the suspension obtained in step 3, and stir a...

Example Embodiment

[0066] Example 3:

[0067] For the preparation of 100g water-based magnetorheological fluid, the preparation steps are as follows:

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

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

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

[0071] Step 4. Add 0.7g (0.7%) of the antioxidant ethanolamine phosphat...

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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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