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Electric rheological liquid

A technology for electrorheological fluids and liquids, used in the preparation of carboxylates, binders, additives, etc.

Inactive Publication Date: 2004-04-21
THE HONG KONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that the large dielectric difference between the particles and the liquid will generate large currents and destroy

Method used

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  • Electric rheological liquid
  • Electric rheological liquid
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Example of Particle Manufacturing

[0019] The manufacture of particles useful in embodiments of the invention will now be described by way of example.

[0020] BTR (urea)

weight / g)

water (ml)

barium chloride

73.35

150

Rubidium Chloride

3.63

75

Titanium(IV) chloride

33

300

Oxalic acid 2-hydrate

94.56

750

Urea

45

165

[0021] First, rubidium chloride was dissolved in distilled water at room temperature, and barium chloride was dissolved in distilled water at a temperature ranging from 50°C to 70°C. Simultaneously, oxalic acid was dissolved in water under an ultrasonic tank at 65 °C. It may take 1 hour for the oxalic acid to completely dissolve. A solution was also prepared with titanium(IV) chloride. Because titanium(IV) chloride is very reactive in water, the liquid should be added slowly to the water using a disposable plastic dropper.

[0022] The solutions...

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Abstract

An electric rheologic liquid contains the granular composition suspended in an electrically insulative hydrophobic liquid. Said granular composition contains a metallic salt M1xM22-2xTiO(C2O4)2, where M1 is chosen from Ba, Sr and Ca and M2 is chosen from Rb, Li, Na and K, and a cocatalyst chosen from urea butylamide and ethylamide.

Description

technical field [0001] The present invention relates to novel electrorheological fluids composed of suspended particles, and in particular to a fluid with a relatively high yield stress. technical background [0002] Electrorheological fluids (ER) are colloidal suspensions whose rheological properties can be changed by applying an external electric field. Specifically, the ER can exhibit solid-like behavior, such as the ability to transport shear stress, upon application of an electric field on the order of 1–2 kV / mm. This transition from a liquid state to a solid state can be very rapid, on the order of 1 to 10 milliseconds, and the transition process is reversible when the electric field is removed. [0003] Electrorheological fluids are important because potentially they can form a simple, quiet and robust interface between electrical current control and mechanical systems. As such, they have many possible applications, including automotive clutc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C55/07C07F19/00C10M101/02C10M105/04C10M105/06C10M107/08C10M107/50C10M133/16C10M133/20C10M139/00C10M169/04C10M171/00C10N10/02C10N10/04C10N10/08C10N20/06C10N40/14
CPCC10M171/001
Inventor 沈平温维佳陈子亭葛惟昆杨世和
Owner THE HONG KONG UNIV OF SCI & TECH
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