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Electrorheological fluid and preparation method thereof

An electrorheological and liquid technology, used in lubricating compositions, additives, petroleum industry, etc., can solve the problems of high yield strength, poor service life, low yield strength, etc., and achieve high yield strength, small leakage current and long life. Effect

Active Publication Date: 2020-04-21
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The yield strength of the former obtained from theory or experiment is too low to meet the requirements of practical application.
The yield strength of the latter is very high, and the key to producing high yield strength in the electric field lies in the role of polar molecules, and polar molecules will desorb, decompose, volatilize, etc. under the action of mechanical friction, high temperature, etc., so polar molecules The service life of the type giant electrorheological fluid is very poor, and it cannot be practical

Method used

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  • Electrorheological fluid and preparation method thereof
  • Electrorheological fluid and preparation method thereof
  • Electrorheological fluid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] 1 part of C60 particles (density 1.68g / cm 3 ) and 200 parts of simethicone oil (viscosity 20cst, density 0.97g / cm 3 ) mixed, and ultrasonically dispersed for 30min to obtain a C60-silicone oil suspension; 50 parts of titanium dioxide particles (with a density of 4.2g / cm 3 , with a particle size of 1.5 μm) was added to the C60-silicon oil suspension, ground carefully, and finally heat-treated at 150° C. for 2 hours to remove water to obtain an electrorheological fluid.

Embodiment 2

[0030] First, 1 part of C60 (density 1.68g / cm 3 ) and 100 parts of xylene (analytically pure, density 0.86g / cm 3 ) mixed and stirred for two hours to obtain a uniform C60-xylene solution; 100 parts of titanium dioxide particles (density of 4.2g / cm 3 , with a particle size of 1.5 μm) was added to the above C60-xylene solution, heated to 140°C after stirring for half an hour, and continued to stir until evaporated to dryness to obtain C60-titanium dioxide particles, that is, C60 was adsorbed on the surface of titanium dioxide. Mix C60-titanium dioxide particles with 100 parts of silicone oil (500cst, density 0.97g / cm 3 ) mixed, carefully ground, and finally heat-treated at 150°C for 2 hours to remove moisture to obtain an electrorheological fluid.

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Abstract

The invention provides an electrorheological fluid and a preparation method thereof. The electrorheological fluid comprises the following components in parts by weight: 50-200 parts of dielectric particles, 1-10 parts of a high-polarizability particle and 20-2000 parts of insulating oil, wherein the high-polarizability particle is fullerene or a combination of fullerene, benzene and benzene derivatives. The electrorheological fluid has the advantages of high yield strength, small leakage current and long service life.

Description

technical field [0001] The invention relates to the technical field of electrorheological fluid, and more specifically relates to an electrorheological fluid composed of fullerene, benzene and derivatives thereof, dielectric particles and insulating oil and a preparation method thereof. Background technique [0002] Electrorheological fluid is a smart material consisting of dielectric particles dispersed in an insulating liquid. At zero external field, the viscosity of the electrorheological fluid is very low. When an external electric field acts on the electrorheological fluid, the shear stress of the electrorheological fluid increases with the increase of the electric field intensity. When the electric field is large enough, the electrorheological fluid transforms into a solid-like substance. And this shear stress transformation is continuously adjustable and reversible, and the response time is on the order of milliseconds, so the electrorheological fluid can be used in ...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10N40/16
CPCC10M169/04C10M125/02C10M2229/041C10M2201/062C10M2203/06
Inventor 邱昭晖熊小敏
Owner SUN YAT SEN UNIV
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