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Preparation method for high heat conduction and radiation material by intercalating metal particles between layers of thin-layer graphene

A technology of thin-layer graphene and metal particles, which is applied in the field of materials, can solve the problems of inability to conduct heat, achieve the effects of low environmental pollution, low cost, and improved heat conduction

Inactive Publication Date: 2012-12-05
叶全惠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]At present, thin-layer graphene has not been developed as a heat dissipation material. Although two sheets of thin-layer graphene can be easily pressed into a film with high mechanical strength, there are The band gap of 0.334 nm cannot conduct heat, and the two layers of graphene can only rely on the temperature gradient to conduct heat slowly

Method used

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  • Preparation method for high heat conduction and radiation material by intercalating metal particles between layers of thin-layer graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 4 g of graphite (10 mesh), 1 mL of 30% hydrogen peroxide, stir well, add 20 mL of oleum containing 20% ​​sulfur trioxide, stir at 30 °C for 1 h, filter, wash with water, 80 Bake at ℃ for 4 h;

[0034] Microwave the above dried sulfuric acid intercalated graphite residues to obtain worm-like graphene aggregates, ultrasonicate in organic solvents such as nitrogen-methylpyrrolidone, ethanol, acetone or water at 150 W power, and ultrasonicate for 2 minutes to obtain cleavage thin-layer graphene, freeze-dried;

[0035] The above two steps are repeated one or more times to ensure that the number of graphene layers prepared is 2-50 layers, the sheet size is 2-300 microns, and the carbon-oxygen ratio is 20-100;

[0036] Weigh 500 mg of the above-prepared thin-layer graphene, 1.0 g NiCl 2 Placed in a 50 ml reaction kettle. And put it in an oven at 300 °C for 24 h. A thin-layer graphene intercalation material intercalated with nickel chloride was prepared.

[0037] The...

Embodiment 2

[0041] Weigh 6 g of graphite (325 mesh), 1.5 mL of 30% hydrogen peroxide, stir well, add 10 mL of oleum containing 20% ​​sulfur trioxide, stir at 50 °C for 1 h, filter, wash with water, Bake at 100°C for 4 h.

[0042] Microwave the sulfuric acid intercalated graphite residues dried above to obtain worm-like graphene aggregates, and ultrasonicate them in nitrogen-methylpyrrolidone, ethanol, acetone and other organic solvents or water at 500 W power, and the ultrasonic time is 60 minutes to obtain cleavage thin-layer graphene, freeze-dried.

[0043] The above two steps are repeated one or more times to ensure that the number of prepared graphene layers is 2-50, the sheet size is 2-300 microns, and the carbon-oxygen ratio is 20-100.

[0044] Weigh 500 mg of the above-prepared thin-layer graphene, 1.0 g FeCl 3 Placed in a 50 ml reaction kettle. And put it in an oven at 300 °C for 24 h. A thin-layer graphene intercalation material intercalated with ferric chloride was prepared....

Embodiment 3

[0049]Weigh 3 g of graphite (500 μm in lateral dimension), 0.5 mL of 40% hydrogen peroxide, stir well, add 5 mL of 96% concentrated sulfuric acid, 10 g of phosphorus pentoxide, stir at 30 °C for 1 h, filter , washed with water, and dried at 80°C for 4 h.

[0050] Microwave the above dried sulfuric acid intercalated graphite residues to obtain worm-like graphene aggregates, ultrasonicate in organic solvents such as nitrogen-methylpyrrolidone, ethanol, acetone or water with 50 W power, and ultrasonicate for 4 hours to obtain cleavage thin-layer graphene, freeze-dried.

[0051] The above two steps are repeated one or more times to ensure that the number of prepared graphene layers is 2-50, the sheet size is 2-300 microns, and the carbon-oxygen ratio is 20-100.

[0052] Weigh 1.0 g of the above-prepared thin-layer graphene, 500 mg CuCl 2 Placed in a 50 ml reaction kettle. And put it in an oven at 200 °C for 24 h. A thin-layer graphene intercalation material intercalated with c...

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Abstract

The invention discloses a preparation method for a high heat conduction and radiation material by intercalating metal particles between layers of thin-layer graphene. The preparation method comprises the steps as follows: A, mixing graphite with hydrogen peroxide with the concentration of 30-60%, adding fuming sulfuric acid with 20% of sulfur trioxide or 96% of concentrated sulfuric acid and phosphorus pentoxide to prepare sulfuric acid intercalated graphite, washing by water and drying; B, carrying out microwave treatment to obtain expanded thin-layer graphene, ultrasonically cleaving and drying; C, repeating the steps A and B for one or more times, and enabling the prepared graphene to have 2-50 layers, the sheet layer size of 2-300 microns and the carbon-to-oxygen ratio of 20-100; D, intercalating metal chloride or metallic simple substance; and E, recovering the thin-layer graphene with the metal chloride intercalation by hydrogen. The metal particles are stored between the layers of the thin-layer graphene in an in-situ way, so that the heat conductivity in the Z direction is improved; and the preparation method is low in environment pollution and cost and suitable for industrial batch production.

Description

technical field [0001] The invention belongs to the field of materials, and mainly relates to a heat-dissipating material with high thermal conductivity, in particular to a preparation method of a heat-dissipating material with high thermal conductivity containing metal particles between thin-layer graphene layers. Background technique [0002] Graphene has immediately aroused great interest in the scientific community since it was first discovered in 2004, and has become one of the hottest materials in recent years. Graphene has a very high electron transport rate due to its unique two-dimensional crystal structure, and is the material with the highest mechanical strength known. At the same time, it has stable chemical properties, transparency, high strength, and good thermal conductivity. , gas sensors, energy storage and composite materials and other fields have extremely attractive application prospects. The preparation of graphene has always been a hot topic of concern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/14
Inventor 叶全惠吴本来尹建辉
Owner 叶全惠
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