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Carbon film with high conductivity and heat conduction and forming process therefor

A material film and forming process technology, applied in the field of graphite, can solve the problems of incapable of large-scale industrial production, low production efficiency, large film defects, etc., and achieve the effects of low porosity, improved electrical conductivity, and stable temperature rise

Inactive Publication Date: 2015-02-18
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the above-mentioned methods are relatively complicated, and the produced films have large defects, low production efficiency, and cannot be used in industrial production on a large scale.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Put 100 parts of carbon nanotube powder with a particle size of 50 μm, 100 parts of copper powder, 0.01 part of polyacrylic acid and a sufficient amount of water in a ball mill jar, and ball mill for 1 hour to obtain a carbon nanotube slurry;

[0061] (2) Add 5 parts of hydroxyethyl cellulose and 0.1 part of dibutyl phthalate, put them in a ball mill jar, and ball mill for 1 hour under vacuum conditions, and remove the air bubbles in the slurry by vacuuming , to obtain a uniform and stable slurry;

[0062] (3) When forming, apply an electric field near the base belt with an electric field strength of 20kv / m; flow the slurry from the lower part of the hopper of the tape casting equipment to the base belt, and form a blank film through the relative movement of the base belt and the scraper and control its thickness 30μm;

[0063] (4) Place the carbon nanotube blank film in a drying chamber to evaporate the solvent; the temperature of the drying chamber is divided int...

Embodiment 2

[0068] (1) Put 20 parts of graphene oxide powder, 80 parts of carbon nanotube powder, 0.1 part of iron powder, 0.05 part of polymethacrylic acid and sufficient water with a particle size of 20 μm in a ball mill jar, and ball mill for 2 hours to obtain a mixed slurry;

[0069] (2) Add 10 parts of hydroxymethyl cellulose and 0.5 parts of dioctyl phthalate, put them in a ball mill tank, and ball mill for 2 hours under vacuum conditions, and remove the air bubbles in the slurry by vacuuming , to obtain a uniform and stable slurry;

[0070] (3) When forming, apply an electric field near the base belt with an electric field strength of 200kv / m; flow the slurry from the lower part of the hopper of the tape casting equipment to the base belt, and form a blank film through the relative movement of the base belt and the scraper and control it. The thickness is 100μm;

[0071] (4) Place the blank film in the drying room to evaporate the solvent; the temperature of the drying room is di...

Embodiment 3

[0076] (1) Put 10 parts of graphene powder with a particle size of 10 μm, 90 parts of conductive carbon black powder, 1 part of manganese powder, 5 parts of polymethacrylic acid and sufficient water in a ball mill tank, and ball mill for 5 hours to obtain a mixed slurry body;

[0077] (2) Then add 60 parts of polyvinyl alcohol and 10 parts of diethyl oxalate, put them in a ball mill tank, and ball mill for 5 hours under vacuum conditions, and remove the air bubbles in the slurry by vacuuming to obtain a uniform stable slurry;

[0078] (3) When forming, apply an electric field near the base belt, and the electric field strength is 2000kv / m; the slurry flows from the lower part of the hopper of the tape casting equipment to the base belt, and the blank film is formed and controlled by the relative movement of the base belt and the scraper. The thickness is 50μm;

[0079] (4) Place the base film in the drying room to evaporate the solvent; the temperature of the drying room is...

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Abstract

The invention provides a forming process for a carbon film with high conductivity and heat conduction and a film product thereof. The forming process includes the following steps: (1) carbon powder and a dispersing agent are added into a solvent to be mixed to obtain a carbon paste; (2) a binding agent and a plasticizer are added into the carbon paste to be mixed to obtain an even and stable sizing agent; (3) the sizing agent flows from the bottom of a hopper of tape casting equipment to a base band and forms a semifinished film through the relative movement between the base band and a scraper; (4) the semifinished carbon film is placed in a drying room for solvent evaporation; (5) preburning is performed at the temperature of 200 DEG C to 800 DEG C; (6) in a protective atmosphere, sintering is conducted for 1 to 10h at an increased temperature of 1000 DEG C to 2000 DEG C to obtain a sintered film. Through dispersion of the binding agent in the semifinished film, the semifinished film obtains a certain degree of strength and operability for tape casting, so that the porosity of the carbon film is reduced and the conductivity and heat conduction of carbon film products are improved.

Description

[0001] technical field [0002] The invention relates to the technical field of graphite, in particular to a high-conductivity and heat-conduction carbon material film and a molding process thereof. [0003] Background technique [0004] The common graphite is formed by stacking layers of planar carbon atoms arranged in a honeycomb order, while the interlayer force of graphite is weak, and it is easy to peel off each other to form thin graphite sheets. When the graphite sheet is peeled off into a single layer, this single layer with a thickness of only one carbon atom is graphene. Graphene has long been considered a hypothetical structure that cannot exist on its own. Until 2004, British physicists Andre Geim and Konstantin Roo Shlov successfully separated graphene from graphite in experiments, thus confirming that it can exist alone. Jointly awarded the 2010 Nobel Prize in Physics for groundbreaking experiments on two-dimensional graphene. [0005] The appearance ...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B31/04
Inventor 杨桂生姚晨光李万里
Owner HEFEI GENIUS NEW MATERIALS
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