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Preparation method of high-conversion-rate graphene carbon nano tube heating film

A high conversion rate, graphene carbon technology, applied in the field of materials, can solve the problems of graphene preparation difficulties, high prices, and dispersion difficulties, and achieve the effects of improving electrothermal conversion efficiency, improving electrical conductivity, and improving environmental performance.

Inactive Publication Date: 2018-10-23
杭州牛墨科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

However, graphene still has disadvantages such as difficulty in preparation, high price, difficulty in dispersing in solution and unsuitable for processing.

Method used

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  • Preparation method of high-conversion-rate graphene carbon nano tube heating film

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Embodiment 1

[0014] A method for preparing a high-conversion graphene carbon nanotube heating film, first mixing an adhesive and a solvent, dispersing at a high speed for a period of time, then adding graphene, carbon nanotubes, and nano-carbon powder, stirring and dispersing for a period of time, adding and grinding Grind in the machine to the required fineness, filter to obtain the dispersion slurry, make the dispersion slurry into a film, and dry it. Wherein the heating film comprises the following components (dry film) in mass percentage: 15% graphene, 8% carbon nanotubes, 5% nanometer carbon powder, and 72% binder. In this embodiment, the particle size of the nano-carbon powder is 10-20 nm, and the electrothermal conversion rate of the test heating film is 98.1%.

Embodiment 2

[0016] A method for preparing a high-conversion graphene carbon nanotube heating film, first mixing an adhesive and a solvent, dispersing at a high speed for a period of time, then adding graphene, carbon nanotubes, and nano-carbon powder, stirring and dispersing for a period of time, adding and grinding Grind in the machine to the required fineness, filter to obtain the dispersion slurry, make the dispersion slurry into a film, and dry it. Wherein the heating film comprises the following components (dry film) in mass percentage: 25% graphene, 8% carbon nanotubes, 10% nanometer carbon powder, and 57% binder. In this embodiment, the particle size of nano carbon powder is 10-20nm. The electrothermal conversion rate of the test heating film was 99.0%.

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Abstract

The invention relates to a preparation method of a high-conversion-rate graphene carbon nano tube heating film. The heating film is prepared from the following materials by mass percentage: 15-30% ofgraphene, 5-10% of carbon nano tubes, and 5-15% of nano carbon powder, the graphene, the carbon nano tubes and the nano carbon powder are compounded for using, so a product with a high electric-heat conversion rate and stable dispersion is obtained. It is discovered by a research that although nano carbon powder is non-conducting, the heat conductivity and the electric-heat conversion rate of thenano carbon powder are higher, and the carbon nano tubes have an interaction function and are capable of enabling the graphene to be dispersed, so the stability of a product is improved. Through the cooperative usage of the graphene, the carbon nano tubes and the nano carbon powder, the electric-heat conversion efficiency of heating can be improved, and reaches 98% or more.

Description

technical field [0001] The invention relates to a preparation method of a graphene carbon nanotube heating film with a high conversion rate, belonging to the field of materials. Background technique [0002] With the development of society, more and more electrothermal materials are applied to fields such as electrothermal physiotherapy and electric heating. Traditional electric heating materials are divided into two categories: metal resistance wire (nickel-chromium alloy, iron-chromium-aluminum alloy) and ceramic heating materials. The disadvantages of metal resistance wires are high density, easy oxidation, low heat conversion efficiency, and serious electromagnetic radiation. Moreover, the weldability of the alloy is poor, and it is difficult to repair the ceramic heating material after damage. The disadvantage of the ceramic heating material is that the heating rate is slow, and it has great brittleness and poor vibration resistance. Therefore, it is of great signific...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L63/00C08L77/00C08L67/00C08L61/06C08K3/04C08J5/18H05B3/20H05B3/14
CPCC08J5/18C08J2361/06C08J2363/00C08J2367/00C08J2375/04C08J2377/00C08K3/04C08K3/041C08K3/042H05B3/145H05B3/20Y02P20/10
Inventor 杨新汪丰礼
Owner 杭州牛墨科技有限公司