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Application of ionic liquid serving as magnetorheological fluid base solution, magnetorheological fluid based on ionic liquid and preparation method thereof

A technology for ionic liquids and magnetorheological fluids, applied in the petroleum industry, lubricating compositions, etc., can solve the problems of poor stability of water-based magnetorheological fluids, loss of dispersant function, large thermal expansion coefficient, etc., and achieve good design performance, Good thermal stability, good stability effect

Inactive Publication Date: 2013-09-18
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of them focus on the performance testing of magnetorheological fluids, the construction of theoretical models and the design of application devices, etc., while the research on the base fluid of magnetorheological fluids is insufficient.
There are still many deficiencies in the current magnetorheological fluids, for example, loss of volatilization or dispersant function due to high temperature, high zero-field viscosity or solidification due to low temperature, poor sedimentation stability, poor redispersibility, silicone oil-based magnetorheological fluid Large coefficient of thermal expansion, poor stability of water-based magnetorheological fluid, etc.

Method used

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  • Application of ionic liquid serving as magnetorheological fluid base solution, magnetorheological fluid based on ionic liquid and preparation method thereof
  • Application of ionic liquid serving as magnetorheological fluid base solution, magnetorheological fluid based on ionic liquid and preparation method thereof

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Effect test

Embodiment 1

[0025] Firstly, the pentacarbonyl iron powder is pyrolyzed and ground to obtain carbonyl iron powder with a particle size of micron or submicron, and the obtained carbonyl iron powder is phosphated to obtain carbonyl iron powder magnetic particles, and then 18 parts by mass of 1- Ethyl-3-methylimidazolium tetrafluoroborate ionic liquid (see Table 1 for its specific parameters), measure the total mass parts as 2 parts of additives, add the additives into the ionic liquid and stir evenly, the thixotropic agent in the additive is selected Organic bentonite, the dispersant is a silane coupling agent, the lubricant is graphite, and the nanoparticles are nano-iron oxides. Finally, 80 parts by mass of phosphated carbonyl iron powder are added to the ionic liquid, and a sand mill is used to disperse the mixer Disperse at a high speed of 3000 rpm for 10 hours, and then prepare the ionic liquid-based magnetorheological fluid.

Embodiment 2

[0027] Firstly prepare iron carbide powder, carry out silicon dioxide coating treatment to the obtained powder mixture to obtain magnetic particles with a particle size of micron or submicron, and then measure 39.5 parts by mass of 1-octyl-3-methylimidazolium tetrafluoro Borate ionic liquid (see Table 1 for its specific parameters), the total mass part is 0.5 part of additive, the additive is added into the ionic liquid and stirred evenly, the thixotropic agent in the additive is organic bentonite, the dispersant is stearate, The lubricant is molybdenum disulfide, and the nanoparticles are nano-silicon oxide. Finally, 60 parts by mass of silicon dioxide-coated iron carbide magnetic particles are taken, and the silicon dioxide-coated iron carbide magnetic particles are added to the ionic liquid. , and disperse at high speed for 5 hours with a sand mill dispersing mixer at a speed of 5000 r / min to prepare an ionic liquid-based magnetorheological fluid.

Embodiment 3

[0029] Preparation of iron oxide powder, polystyrene coating treatment on the obtained powder to obtain magnetic particles with a particle size of micron or submicron, and then measure 25 parts by mass of 1-octyl-3-methylimidazolium chloride ion Liquid (see Table 1 for its specific parameters), the total mass parts are 5 parts of additives, the thixotropic agent in the additives is inorganic bentonite, the dispersant is alkyl sulfate, the lubricant is oleic acid, and the nanoparticles are nano-zinc oxide , and finally take 70 parts by mass of polystyrene-coated iron oxide powder, then add the coated iron oxide magnetic particles into the ionic liquid, and disperse at a high speed of 8000 rpm with a sand mill dispersing mixer Hours, the ionic liquid-based magnetorheological fluid is formulated.

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Abstract

The invention discloses an application of an ionic liquid serving as a magnetorheological fluid base solution, and also discloses magnetorheological fluid based on the ionic liquid, namely an ionic liquid-based magnetorheological fluid. The magnetorheological fluid comprises the base solution, a dispersed phase and addictives, wherein micro or submicro magnetic particles are used as the dispersed phase; the base solution is an ionic liquid and comprises the components in parts by weight: 8-39.5 parts of the base solution, 60-90 parts of the dispersed phase and 0.5-5 parts of the addictives. A method for preparing the magnetorheological fluid based on the ionic liquid comprises the following steps of: firstly, preparing magnetic particles; acquiring the ionic liquid and the maddictives in the mass proportion; adding the addictives into the ionic liquid, and stirring for dissolving in a mixed mode; finally, adding the magnetic particles, stirring and uniformly stirring in a mixed mode to finish the preparation of the magnetorheological fluid. The magnetorheological fluid is high in stability, wide in operating temperature and high in designability, has environment-friendly property, and is suitable for vacuum environment.

Description

technical field [0001] The invention relates to a new application of an ionic liquid, and also relates to a novel green and environment-friendly magnetorheological fluid and a preparation method thereof. Background technique [0002] Magnetorheological fluid (Magnetic Rheological Fluid, MRF) is a new type of intelligent fluid material, a magnetic field controllable suspension system composed of magnetic particles, base fluid and appropriate additives. When there is no external magnetic field, the magnetorheological fluid exhibits good liquid fluidity; under the external magnetic field, it produces obvious magnetorheological effect. The effect is manifested as: the apparent viscosity can be increased by more than two orders of magnitude in a very short time (on the order of milliseconds), and this transformation is stepless continuous, reversible, controllable, and consumes little energy. Therefore, intelligent devices developed using these characteristics, such as shock abs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N40/14
Inventor 何国田谷明信王仲勋陈希朱晓强徐泽宇林远长赵健刘永福
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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