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Preparation method of magnetorheological fluid applied to high-power occasion

A magnetorheological fluid, high-power technology, applied in the direction of magnetic fluids, etc., can solve the problem of rapid increase in working temperature, and achieve the effect of being conducive to the magnetorheological effect and good friction reduction ability.

Inactive Publication Date: 2019-05-17
芮志行
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Problems solved by technology

[0008] The technical problem to be solved by the present invention: Aiming at the problem that the magnetorheological fluid in the prior art is used in high-power transmission occasions, the phenomenon of heating in the working gap is very serious, and the working temperature rises rapidly, a magnetorheological fluid for high-power occasions is provided. liquid preparation method

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  • Preparation method of magnetorheological fluid applied to high-power occasion

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[0036] In terms of parts by weight, weigh 10-15 parts of hydroxyl iron powder, 5-10 parts of phosphoric acid with a mass concentration of 20%, and 20-30 parts of absolute ethanol. Stir at 300-400r / min for 15-20min to obtain phosphating solution, add hydroxyl iron powder to the phosphating solution, stir at 300-400r / min for 30-40min at room temperature, filter with suction, take filter cake, wash with acetone for 3-5 Once again, put it at 50~60℃ and dry for 1~1.5h to get phosphating hydroxy iron powder, and weigh 3~5 parts of octyltriethoxysilane and 1~3 parts by weight respectively 10% acetic acid, 10~20 parts of deionized water, 80~90 parts of absolute ethanol, 8~10 parts of carbonyl phosphide iron powder, add octyltriethoxysilane, acetic acid, deionized water to anhydrous ethyl alcohol , stir at 160~180r / min for 20~30min at room temperature to obtain octyltriethoxysilane modified liquid, add carbonyl iron phosphide powder into octyltriethoxysilane modified liquid, Stir magn...

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Abstract

The invention relates to a preparation method of a magnetorheological fluid applied to a high-power occasion and belongs to the technical field of smart materials. According to the preparation method,surface treatment is performed on phosphate carbonyl iron powder through octyl triethoxysilane, and lipophilic phosphate carbonyl iron powder magnetic-conductive particles are prepared; after the surfactant treatment of the phosphate carbonyl iron powder through the octyl triethoxysilane surfactant, the phenomenon of aggregation of the phosphate carbonyl iron powder particles in a non-magnetic-conductive base body can be suppressed; meanwhile, organic groups of octyl triethoxysilane are adsorbed to particle surfaces through physical adsorption, chemical adsorption and electrostatic interaction, the dispersity and stability of the phosphate carbonyl iron powder in an oil phase are improved, and therefore the phenomena of aggregation and sedimentation of the lipophilic phosphate carbonyl iron powder magnetic-conductive particles in a non-magnetic-conductive carrier liquid are reduced; and moreover, after the phosphate carbonyl iron powder has lipophilicity, the molecular acting force between the phosphate carbonyl iron powder and linear polysiloxane can be effectively enhanced, so that heat conductivity in the high-viscosity linear polysiloxane is effectively improved.

Description

technical field [0001] The invention relates to a preparation method of magnetorheological fluid for high-power occasions, and belongs to the technical field of intelligent materials. Background technique [0002] As a magnetically sensitive smart material, magnetorheological fluid is mainly composed of magnetic particles and a liquid matrix, and some other additives are usually added to increase its stability. When an external magnetic field is applied to magnetorheological fluid, it can change from a liquid state to a solid-like state within a few milliseconds, and when the external magnetic field is removed, it can quickly change from a solid-like state to a liquid state. Magneto-rheological fluid has caused everyone's attention rapidly because of its excellent performance, and more and more scholars have launched research on it from aspects such as performance optimization, mechanism and application; Although there are many studies about magnetorheological fluid, There ...

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Application Information

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IPC IPC(8): H01F1/44
Inventor 芮志行王益民史志新
Owner 芮志行
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