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Electrorheological liquid preparation method for core-shell particle/composite base liquid

An electrorheological fluid and composite matrix technology, applied in the field of material science and engineering, can solve the problems of easy precipitation, poor anti-settling resistance of electro-rheological fluid, and large particle ratio, and achieve the effect of improving electro-rheological strength and improving anti-settling property.

Inactive Publication Date: 2009-08-19
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, due to the large specific gravity of the metal core-shell dispersed phase particles, it is easy to precipitate, which makes the anti-sedimentation resistance of the electrorheological fluid poor.

Method used

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  • Electrorheological liquid preparation method for core-shell particle/composite base liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Select nickel particles with an average particle size of 40 nanometers;

[0017] 2. Put the particles into an aqueous solution of 8mol / l NaOH (8mol / l) for ultrasonic stirring, then wash with water, magnetically separate the particles, and add tetrabutyl titanate to absolute ethanol in a volume ratio of 1: 1 solution, ultrasonic stirring, magnetic separation of particles;

[0018] 3. Add a mixed solution containing urea, deionized water, and absolute ethanol to the particles, stir ultrasonically, wash with water, separate the particles magnetically, and dry the particles at 120°C. The volume ratio of the components of the mixed solution is urea : deionized water: absolute ethanol = 4:1:10;

[0019] 4. Repeat steps 2 to 3 twice for the particles treated in step 3 to obtain nano-core-shell particles with nano-nickel as the core and titanium dioxide and organic polar molecules as the coating layer; the infrared spectrum of the core-shell particles is as follows: figure...

Embodiment 2

[0023] 1~2. With step 1~2 in the embodiment one;

[0024] 3. Add a mixed solution containing triethanolamine, deionized water, and absolute ethanol to the particles obtained in step 2. The volume ratio of each component of the mixed solution is triethanolamine: deionized water: absolute ethanol=4:1:10 , ultrasonically stirred, washed with water, and magnetically separated particles;

[0025] 4-5. Same as steps 4-5 in Example 1.

[0026] The infrared spectra of the prepared core-shell particles are as follows: figure 1 Shown in curve 2.

[0027] The rheological properties are measured with NXS-11 plate-plate viscometer, the relationship between the yield strength of the electrorheological fluid and the electric field intensity is shown in the attached figure 2 Shown in curve 2. After being placed for three months, the anti-sedimentation rate of the electrorheological fluid was measured to be 98%.

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Abstract

A preparation method for electrorheological fluid of core-shell particle / compound base fluid belongs to the materials science and engineering technical field. The preparation method is characterized in that nickel nano-particles are pretreated by sodium hydroxide water solution so that particles are separated; the separated particles are added with tetrabutyl titanate alcohol solution so that particles are separated; the separated particles are added with mixed liquor containing organic polar molecule, deionized water and alcohol so that particles are separated and dried in the 100-120 DEG C; the dried particles are repeatedly coated for 1-2 times, thus the core-shell particles which take the nickel as the core and titanium dioxide and organic polar molecule as clad. And then the core-shell particles are added into the mixed liquor of fluorosilicon oil and dimethylsilicone fluid to prepare the electrorheological fluid. The preparation method has the effect and benefit that the electrorheological fluid obviously increases the effect of the electrorheological fluid of core-shell particle which takes the metal as the core and improves the resistance to settling thereof.

Description

technical field [0001] The invention belongs to the field of material science and engineering technology, and relates to a method for preparing an electrorheological fluid, in particular to a nano-core-shell particle with nano-particle nickel as the core and titanium dioxide and organic polar molecules as the coating layer as the dispersed phase, A method for preparing electrorheological fluid using a mixture of fluorosilicone oil and methyl silicone oil as a composite base fluid. Background technique [0002] Electrorheological fluid is generally a suspension formed by dispersing polarizable particles (dispersed phase) in insulating oil (base fluid). When an electric field is applied to it, its viscosity and shear strength change several orders of magnitude instantaneously, from a low-viscosity fluid that is easy to flow to a high-viscosity solid that is difficult to flow or does not flow. When the electric field is removed, it can return to the liquid state within millise...

Claims

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Application Information

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IPC IPC(8): C10M177/00C10M169/04C10M107/50C10M125/04C10M171/00C10N40/14
Inventor 赵红纪松孟庆伟谭锁奎郭红燕杨建国
Owner DALIAN UNIV OF TECH
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