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Surface modified titanium-calcium oxyoxalate electrorheological fluid and preparation method thereof

A technology of titanyl oxalate and surface modification, which is applied in the petroleum industry, additives, lubricating compositions, etc., can solve the problems of low shear strength and cannot reach the level of industrial application, and achieves low cost, short cycle and simple preparation process. Effect

Active Publication Date: 2009-11-11
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main performance index for evaluating particulate materials is the size of the shear stress, but it has been found that the shear strength of most electrorheological fluids is low, generally not higher than 30kPa, which cannot reach the level of industrial application and realize the value of engineering application

Method used

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  • Surface modified titanium-calcium oxyoxalate electrorheological fluid and preparation method thereof
  • Surface modified titanium-calcium oxyoxalate electrorheological fluid and preparation method thereof
  • Surface modified titanium-calcium oxyoxalate electrorheological fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 0.05mol tetrabutyl titanate to the ethanol solution under stirring conditions to form an alcohol solution with a molar ratio of 1:20, and add 0.5ml glacial acetic acid to prevent the hydrolysis of tetrabutyl titanate to obtain solution A; mol calcium chloride is dissolved in absolute ethanol to prepare 0.5mol / l calcium chloride solution B; 0.1mol oxalic acid is dissolved in deionized water to prepare 0.5mol / l oxalic acid solution, and then the weight ratio of adding the solution is 1% sodium dodecylbenzenesulfonate to obtain solution C; mix solution A and solution B to obtain mixed solution AB; under the condition of vigorous stirring, add mixed solution AB to the solution in a water bath at 50°C In C, a precipitate is gradually formed; after the reaction is complete, continue to stir for 2 hours, and then age for 4 hours; wash the generated precipitate, filter, and dry to obtain the desired surface-modified titanyl oxalate with a size distribution of nanometer to mi...

Embodiment 2

[0025] Add 0.05mol tetrabutyl titanate to the ethanol solution under stirring conditions to form an alcohol solution with a molar ratio of 1:40, and add 0.5ml glacial acetic acid to prevent the hydrolysis of tetrabutyl titanate to obtain solution A; Dissolve 1 mol of calcium chloride in absolute ethanol to prepare 1 mol / l calcium chloride solution B; dissolve 0.1 mol oxalic acid in deionized water to prepare 1 mol / l oxalic acid solution, and then add 2% of the solution by weight Sodium dodecylbenzenesulfonate to obtain solution C; mix solution A and solution B to obtain mixed solution AB; under the condition of vigorous stirring, add mixed solution AB to solution C in a water bath at 50°C, Gradually form a precipitate; continue to stir for 2 hours after the reaction is complete, and then age for 8 hours; wash the formed precipitate, filter, and dry to obtain the desired modified calcium titanyl oxalate particles with a size distribution from nanometer to micrometer.

[0026] T...

Embodiment 3

[0028] Add 0.05 mol of tetraisopropyl titanate to the ethanol solution under stirring conditions to form an alcohol solution with a molar ratio of 1:60, and add 0.5 ml of glacial acetic acid to prevent the hydrolysis of tetraisopropyl titanate to obtain solution A; Dissolve 0.05mol calcium acetate in absolute ethanol to prepare 2mol / l calcium acetate solution B; dissolve 0.1mol oxalic acid in deionized water to prepare 2mol / l oxalic acid solution, then add the solution at a weight ratio of 5% sodium dodecylbenzenesulfonate to obtain solution C; mix solution A and solution B to obtain mixed solution AB; under the condition of vigorous stirring, add mixed solution AB to solution C in a water bath at 20°C , gradually forming a precipitate; after the reaction is complete, continue to stir for 2 hours, and then age for 12 hours; wash the generated precipitate, filter, and dry to obtain the desired modified calcium titanyl oxalate particles with a size distribution from nanometer to ...

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Abstract

The invention relates to a modified titanium-calcium oxyoxalate electrorheological fluid, which is a suspending liquid prepared by taking modified titanium-calcium oxyoxalate with size of nanometer to micron as a disperse phase and uniformly dispersing the modified titanium-calcium oxyoxalate in silicon oil, and is characterized in that: in the process of preparing titanium-calcium oxyoxalate by a coprecipitation method, surfactants with different contents and different types are added to obtain modified titanium-calcium oxyoxalate powder with nano-scale and micron-scale distribution, therefore, not only are the appearance of the powder and the wettability of the powder and silicon oil changed, but also the yield stress of the electrorheological fluid is improved, which can reach up to 155 KPa under 5KV / mm direct-current field, the electrorheological effect is strong, and the zero-field viscosity of the electrorheological fluid is low, thus leading to high electrorheological efficiency, low cost, simple preparation process and short cycle.

Description

technical field [0001] The invention relates to an electrorheological fluid and a preparation method thereof, in particular to a surface-modified calcium titanyl oxalate electrorheological fluid and a preparation method thereof. Background technique [0002] Electrorheological fluid is usually a suspension system formed by dispersing solid particles with high dielectric constant and low conductivity in insulating oil with low dielectric constant, because it can realize rapid and reversible liquid-solid contact under the action of an electric field. , controllable transformation, so electrorheological fluid has become an important artificial intelligence material, and a very potential material in high-efficiency mechatronics. The unique property of electrorheological fluid, which is continuously adjustable in softness and hardness under the action of an electric field, has extensive and important application values, such as clutches, brakes, damping systems, shock absorbers, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M129/28C10N40/16
Inventor 吴敬华许高杰刘丰华刘雪辉郭建军程昱川崔平
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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