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Method for preparing composite thin plate based on glass carbon and carbon nanotube

A carbon nanotube and composite sheet technology, which is applied in the fields of nanostructure manufacturing, nanotechnology, nanotechnology, etc., and can solve the problems of fragile glassy carbon and other problems.

Inactive Publication Date: 2010-08-11
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, because glassy carbon is easy to break, the thickness of glassy carbon sheet is mostly millimeter level during application.

Method used

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  • Method for preparing composite thin plate based on glass carbon and carbon nanotube
  • Method for preparing composite thin plate based on glass carbon and carbon nanotube
  • Method for preparing composite thin plate based on glass carbon and carbon nanotube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 Shown, the N, N-dimethyl of the polyamic acid (PMDA / ODA system) that the percentage by weight is 0.5% multi-walled carbon nanotube (outer diameter 30nm, internal diameter 20nm, length micron level) in 10% solid content After ultrasonic dispersion in acetamide solution, apply a film on the substrate, control the thickness to 300 microns, heat at 60°C for 1 hour, heat at 90°C for 1 hour, heat at 120°C for 1 hour, and heat at 150°C for 1 hour. After removing the polar solvent, In a vacuum oven, heat at 180°C for 1 hour, 200°C for 1 hour, 250°C for 1 hour, and 300°C for 1 hour to complete the imidization, thereby forming a polyimide precursor film with a thickness of about 30 microns. The obtained composite film has a tensile strength of 220 MPa.

Embodiment 2

[0026] The procedure is the same as in Example 1, the weight percentage of multi-walled carbon nanotubes is changed to 50%, and the solid content of polyamic acid is reduced to 5%. The composite film obtained at this time had a tensile strength of 200 MPa.

Embodiment 3

[0028] The steps are as in Example 1, changing the polyamic acid of the PMDA / ODA system into the polyamic acid of the s-BPDA / ODA system. The composite film obtained at this time had a tensile strength of 232 MPa.

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Abstract

The invention relates to a method for preparing composite thin plate based on glass carbon and a carbon nanotube, belonging to the technical field of a composite material. The composite thin plate based on the glass carbon and the carbon nanotube is obtained through carbonizing a polyimide Precursor film at the temperature lower than 2500 DEG C. The intensity of the composite thin plate prepared by the invention can reach above 600 MPa.

Description

technical field [0001] The invention relates to a preparation method in the technical field of composite materials, in particular to a preparation method of a composite sheet based on glassy carbon and carbon nanotubes. Background technique [0002] Glassy carbon, as a special carbon material, has the advantages of both carbon and glass material properties. Compared with general carbon or graphite materials, it has many excellent properties: high mechanical strength, glass-like, air-tight, Strong chemical corrosion resistance, long-term resistance to strong acid corrosion, good thermal stability, strong oxidation resistance, not easily oxidized by air below 600 °C, and can withstand high temperatures of 3000 °C in inert gas. During use, carbon-free The powder flakes off, does not produce pollution, is easy to clean, and can conduct electricity and heat. Therefore, glassy carbon is widely used in chemical industry, metallurgy, semiconductor industry and other sectors. [00...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82B3/00
Inventor 张亚非胡南滔魏浩
Owner SHANGHAI JIAO TONG UNIV
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