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A kind of electrorheological fluid and preparation method thereof

A technology of electrorheological fluids and insulating liquids, applied in the petroleum industry, additives, lubricating compositions, etc., can solve problems such as hindering the development of electrorheological fluids, and achieve the effects of excellent electrorheological properties, large specific surface area and good stability

Active Publication Date: 2021-04-02
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is a common shortcoming of electrorheological fluid materials, which has become a bottleneck hindering the development of electrorheological fluids

Method used

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  • A kind of electrorheological fluid and preparation method thereof
  • A kind of electrorheological fluid and preparation method thereof
  • A kind of electrorheological fluid and preparation method thereof

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preparation example Construction

[0048]As another aspect of the technical solution of the present invention, a method of preparing a current variable liquid according to the present invention, comprising:

[0049]Provides a first mixing system including a metal organic frame material, a surfactant, and a solvent;

[0050]Provides a second mixing system containing organic titanate;

[0051]The second mixing system is mixed with the first mixing system, reacted to obtain a metal organic frame-titanium oxide complex;

[0052]The metal organic frame-titanium oxide complex is uniformly dispersed in the insulating liquid to obtain current variable fluid.

[0053]In some embodiments, the metal organic frame material, the mass ratio of the surfactant and the organic titanate is 1: 0.1 to 4: 3 to 20.

[0054]Wherein, the metal organic frame material can be any metal organic frame prepared by known methods known in the art.

[0055]In some embodiments, the metal organic frame material is preferably an organic-inorganic-inorganic hybrid particles...

Embodiment 1

[0078](1) Weigh 0.055 g mIL-101 (CR) (2483M specific surface area2 / g) in a mixed solvent dispersed in 55 ml of anhydrous ethanol / water (volume ratio 1: 0.1), then 0.0055 g sodium dodecyl benzene sulfonate, the suspension A is obtained;

[0079](2) 0.5 g of tetrabut ester is dissolved in 50 ml of anhydrous ethanol, and the solution B is obtained.

[0080](3) The solution B was added dropwise to the solution A, and the mixture was stirred after four hours and then allowed to stand for 10 hours; filtered the precipitate, washed, dried to give the required MIL-101 ( Cr) - Titanium oxide complex particles.

[0081](4) Disperse the complex particles obtained described above in silicone oil, configured as a mass fraction of 40% by weight of MIL-101 (CR) -toozipide-based current variable fluid. Such asFigure 1 - Figure 3 As shown, the current variable fluid is in the electric field of 4kV / mm, the shear speed is 100s-1When the dynamic shear stress is 40.5 kPa, the leakage current density is 4.5μ...

Embodiment 2

[0083](1) Weigh 0.084G mil-101 ​​(Fe) (2265m specific surface area)2 / g) in a mixed solvent dispersed in 105 ml of anhydrous ethanol / water (volume ratio 1: 0.05), then 0.336 g of sodium dodecyl sulfate, the suspension A is obtained;

[0084](2) 0.25 g of ethyl titanate is dissolved in 50 ml of anhydrous ethanol and stirred for half an hour, and solution B is obtained.

[0085](3) The solution B was added dropwise to the solution A, and the mixture was stirred after four hours and then allowed to stand for 10 hours; filtered the precipitate, washed, dried to give the required MIL-101 ( FE) - Titanium oxide complex particles.

[0086](4) The complex particles obtained were dispersed in castor oil, and the mass fraction was 20% by weight of MIL-101 (Fe) -tooosidide composite current variable fluid. Such asFigure 4 - Figure 6 As shown, the current variable fluid is in the electric field of 4kV / mm, the shear speed is 100s-1When the dynamic shear stress is 39.8kPa, the leakage current density ...

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Abstract

The invention discloses electrorheological fluid and a preparation method thereof. The electrorheological fluid comprises a dispersion phase and a dispersion medium, wherein the dispersion phase comprises a metal-organic framework-titanium oxide complex; the dispersion medium comprises insulating liquid; and the dispersion phase is uniformly dispersed in the dispersion medium. The preparation method comprises the following steps: providing a first mixed system containing a metal-organic framework material, a surfactant and a solvent; providing a second mixed system comprising organic titanate;mixing the second mixed system with the first mixed system, and reacting to obtain the metal-organic framework-titanium oxide complex; and uniformly dispersing the metal-organic framework-titanium oxide complex into the insulating liquid, thereby obtaining the electrorheological fluid. The electrorheological fluid disclosed by the invention is high in dynamic shear stress, excellent in stability,low in leakage current density and excellent in subsidence resistance, and the preparation method is simple, feasible and low in cost.

Description

Technical field[0001]The present invention relates to a current variable fluid, and more particularly to a metal organic frame / titanium oxide composite current variable fluid and a preparation method thereof, belonging to the field of current soot fluid.Background technique[0002]Current variability is a suspension formed by dispersing dielectric particles (dispersed) in the insulating liquid (dispersion medium). After the electric field is applied, the dielectric particles may be contrained in the electric field direction in the dispersion medium, and the macroscopic manifestation increases the system viscosity as the electric field strength increases, which can be used in a very short time. Liquid is converted into a category; after the electric field is removed, the current variable fluid can be quickly transformed from the liquid state. Current varics is a huge intelligent material for development potential, which has the adjustable, fast response speed, reversible, low energy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M161/00C10N30/04
CPCC10M161/00C10M2201/062C10M2207/402C10M2229/00C10M2229/025C10N2030/04C10N2030/60
Inventor 程昱川牛益民华乐天李志祥刘丰华孙爱华郭建军许高杰晏育刚陆祥芳
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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