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Mechanically shearing process of preparing one-dimensional nanometer material

A nanomaterial, mechanical shearing technology, applied in the direction of epoxy resin glue, adhesive type, adhesive, etc., can solve the problems of tube wall damage, long grinding time, etc., to achieve less structural damage and damage, shearing efficiency high effect

Inactive Publication Date: 2008-08-20
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the grinding time is relatively long, and the wall of the carbon nanotube is greatly damaged due to the multiple collisions between the corundum and the carbon nanotube.

Method used

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  • Mechanically shearing process of preparing one-dimensional nanometer material
  • Mechanically shearing process of preparing one-dimensional nanometer material
  • Mechanically shearing process of preparing one-dimensional nanometer material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Use the purchased silicon carbide sandpaper (the diameter of the sand grains is 2-4 microns) as the cutting edge plate, put the carbon nanotubes on the sandpaper, put the two sides of the sandpaper against each other and put them into a mold with a certain structure, and use a powder press machine to align them. Apply pressure, such as figure 1 shown. The pressure is 40MPa, and the pressurization time is 2 minutes. Then take out the sandpaper, put it into water for ultrasonication, and take out the sandpaper after ultrasonication for 5 minutes. The aqueous solution containing the carbon nanotubes was centrifuged for 5 minutes at a rotational speed of 100 rpm. The upper suspension is extracted and dried to obtain short carbon nanotubes. image 3 As the raw material used in this example, carbon nanotubes are long in length and entangled with each other. Figure 4 This is the scanning photo of the short carbon nanotubes finally obtained in this example. Compared with t...

Embodiment 2

[0035] Evenly coat a layer of AG-80 epoxy resin on the base paper or cloth, the thickness of the adhesive layer is 0.05-0.1mm, then sprinkle diamond powder (1-2 microns in diameter), and dry at 40°C for 1 hour to prepare a diamond bag Covered flat panel. A pressure of 30 MPa was applied for 1 minute after the carbon nanotubes were inserted. Carbon nanotubes with an average length of 400nm can be obtained after centrifugation to remove diamonds, see Figure 5 shown.

Embodiment 3

[0037] Utilize the method for embodiment 2, be that the diameter of 5 centimeters sticks one deck diamond micropowder to prepare the blade roller of diamond coating, adjust the spacing of two rollers to be 4.9 centimetres, and relatively rotate, the carbon nanotube is slowly Falling, the schematic diagram of the process is as follows figure 2 As shown, the length of the sheared carbon nanotubes is 500 nm.

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Abstract

The present invention relates to nanometer material processing technology, and is especially mechanically shearing process of preparing one-dimensional nanometer material. The mechanically shearing process of preparing one-dimensional nanometer material with superhard particle includes the steps of: forming mechanical shearing tool, shearing one-dimensional nanometer material and separating the one-dimensional nanometer material from the mechanical shearing tool. The mechanical shearing tool may be one metal plane with adhered superhard particle or grown superhard particle, one edged roller with adhered superhard particle or superhard particle mixed directly with the material to be processed. By means of selecting superhard particle, short one-dimensional nanometer material of length from several hundred nanometer to several microns may be obtained. The short one-dimensional nanometer material is easy to disperse in solid or liquid medium.

Description

technical field [0001] The invention relates to a method in the technical field of nanomaterial processing, in particular to a method for mechanically shearing one-dimensional nanomaterials. Background technique [0002] One-dimensional nanomaterials such as carbon nanotubes have many superior properties and can be applied in various fields such as electronics, machinery, energy, materials, etc., especially have great potential in the application of nanoelectronic devices and super composite materials. However, the one-dimensional nanomaterials such as carbon nanotubes usually prepared have large specific surface area and high aspect ratio, and are easy to agglomerate and entangle with each other, making it difficult to disperse and manipulate. If cut into a short one-dimensional nanomaterial, it is not easy to entangle, and it is easy to be uniformly dispersed in a solid or liquid medium. Therefore, how to effectively shorten one-dimensional nanomaterials such as long carbo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C18/02B02C18/04B02C18/06B02C18/18B02C18/28B02C19/00B02C23/08C09J177/00C09J161/00C09J163/00
Inventor 张亚非刘丽月
Owner SHANGHAI JIAOTONG UNIV