Kaolin/dimethyl sulphoxide/carboxymethyl starch ternary system nanotube composite electrorheological fluid materials

A technology of dimethyl sulfoxide and carboxymethyl starch is applied in the directions of base material, lubricating composition, petroleum industry, etc., and can solve the problems of complex preparation process, high cost, low mechanical value and the like

Inactive Publication Date: 2006-11-22
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

However, the invention has low mechanical value, high cost and complex preparation process

Method used

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  • Kaolin/dimethyl sulphoxide/carboxymethyl starch ternary system nanotube composite electrorheological fluid materials
  • Kaolin/dimethyl sulphoxide/carboxymethyl starch ternary system nanotube composite electrorheological fluid materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: First weigh 3g of kaolin and put it into a weighing bottle, then use a dropper to absorb an appropriate amount of dimethyl sulfoxide, slowly add it to the kaolin, and shake it evenly while adding it dropwise. The amount of dimethyl sulfoxide is about 30% by weight of pure earth. After the sample was ultrasonically oscillated for 30 minutes, it was placed in an airtight container and reacted in an oven at 80° C. for 10 hours to prepare the kaolin / dimethyl sulfoxide intercalation complex. At the same time, add 20g of starch to 150ml of absolute ethanol, stir for 1 hour, add 15g of NaOH, continue to stir for 1 hour, raise the temperature to 50°C, add 15g of NaOH and 71g of chloroacetic acid, stir at 50°C for more than 5 hours, the reaction is complete, and then filter with suction , washed, and vacuum-dried at 60°C for 5 hours to obtain carboxymethyl starch. Add 3.5 g of carboxymethyl starch into 50 ml of water, stir at room temperature for 10 hours, then sl...

Embodiment 2

[0010] Embodiment two: (carboxymethyl starch electrorheological fluid)

[0011] First add 20g of starch to 150ml of absolute ethanol, stir for 1 hour, add 15g of NaOH, continue to stir for 1 hour, raise the temperature to 50°C, add 15g of NaOH and 71g of chloroacetic acid, stir at 50°C for more than 5 hours, and the reaction is complete. After suction filtration, washing, and vacuum drying at 60°C for 5 hours, carboxymethyl starch is obtained, and then it is mixed with methyl silicone oil in a certain proportion to make electrorheological fluid. The relationship between the shear stress of the electrorheological fluid and the electric field strength is shown in the attached figure 1 shown.

Embodiment 3

[0012] Embodiment three: (pure kaolin electrorheological fluid)

[0013] The electrorheological fluid was prepared by kaolin and methyl silicone oil dried at 120°C for 2 hours in a certain proportion. The relationship between the shear stress of the electrorheological fluid and the electric field strength is shown in the attached figure 1 shown.

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Abstract

The invention relates to an electrorheological fluid material, in particular to a kaolin / dimethyl sulfoxide / carboxymethyl starch ternary system nanocomposite electrorheological fluid material. Compared with the binary system composite material used as the dispersed phase of electrorheological fluid in the past, the dispersed phase material prepared by the invention has a novel structure and belongs to the ternary system. It uses kaolin / dimethyl sulfoxide intercalation complex as the core, and then wraps carboxymethyl starch. The application of this ternary system improves the dielectric properties of the material and fully exerts the nano-synergistic effect, so that the electro-rheological fluid has a strong electro-rheological effect, a wide working temperature range, low cost and good anti-settling sex. The accompanying drawing shows the relationship between the shear stress and the electric field intensity of the electrorheological fluid of the kaolin / dimethyl sulfoxide / carboxymethyl starch ternary system nanocomposite particles.

Description

technical field [0001] The invention relates to an electrorheological fluid material, in particular to a kaolin / dimethyl sulfoxide / carboxymethyl starch ternary system nanocomposite electrorheological fluid material. Background technique [0002] As a smart material, electrorheological fluid has attracted widespread attention. It is a suspension system formed by dispersing tiny particles with high dielectric constant and low conductivity in insulating oil with low dielectric constant. It has great application prospects in vibration reduction, mechanical transmission, automatic control, mechatronics, micro-drive and other fields. Electrorheological fluid materials are mostly two-phase systems, that is, composed of dispersed phase (particles) and continuous phase (base fluid). The research on dispersed phase materials is mostly concentrated in the two fields of inorganic oxide materials and organic polymer materials. Inorganic materials such as European patent EP0396237 utiliz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M161/00C10M107/50
Inventor 赵晓鹏王宝祥姚远
Owner NORTHWESTERN POLYTECHNICAL UNIV
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