Composite carbon nanotube film, preparation method thereof and layered heating device

A carbon nanotube film and technology of carbon nanotubes, applied in the direction of chemical instruments and methods, coatings, carbon compounds, etc., can solve the problems of limited heat, low conductivity, and difficulty in meeting actual needs of carbon nanotube films, and achieve The effect of heat generation performance improvement

Pending Publication Date: 2022-03-18
SHENZHEN XIWAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Specifically, due to its low conductivity, the amount of heat that can be generated at lower voltages is limited and the ...

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  • Composite carbon nanotube film, preparation method thereof and layered heating device
  • Composite carbon nanotube film, preparation method thereof and layered heating device
  • Composite carbon nanotube film, preparation method thereof and layered heating device

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preparation example Construction

[0038]According to an embodiment of the present invention, a method for preparing a composite carbon nanotube film includes the following steps.

[0039] In step S1, a carbon nanotube base film is obtained, and the carbon nanotube base film includes a layer of carbon nanotube film or a multi-layered carbon nanotube film. Wherein, the carbon nanotube film has first carbon nanotubes arranged in alignment.

[0040] In one specific example, the carbon nanotube base film includes multilayer carbon nanotube films, and the multilayer carbon nanotube films are stacked. Usually, the thickness of a layer of oriented carbon nanotube base film is relatively limited, resulting in relatively large volume resistance and low overall strength, which is not suitable for some application scenarios. Therefore, it is possible to form an overall thicker film by stacking multiple layers of carbon nanotube films. carbon nanotube-based film. Optionally, the number of layers of the aligned carbon nan...

Embodiment 1

[0071] Pull out a carbon nanotube film with a width of about 10 cm from the carbon nanotube array, repeat this step and overlap 50 layers of carbon nanotube films, and at the same time take the method of adding ethanol for infiltration and rolling to make the laminated carbon nanotube film more compact. Densification, followed by drying treatment, to prepare carbon nanotube base film; wherein, the pressure of the pressing roller is 0.4MPa, the moving speed of the pressing roller is 2m / min; the drying temperature is 150°C.

[0072] The obtained carbon nanotube base film is double-sidedly coated with carbon nanotube slurry through a small roll-to-roll doctor blade casting coating roll system; wherein, according to the mass ratio, the carbon nanotube slurry ratio is: 5 % of carbon nanotubes, 1% of PVP; 2.2% of PVDF and the remainder of NMP; the viscosity of the carbon nanotube slurry is 4520cp; the thickness of the blade coating is 200 μm; the blade coating speed is 0.2m / min , th...

Embodiment 2

[0074] Pull out a carbon nanotube film with a width of about 10 cm from the carbon nanotube array, repeat this step and overlap 50 layers of carbon nanotube films, and at the same time take the method of adding ethanol for infiltration and rolling to make the laminated carbon nanotube film more compact. Densification, followed by drying treatment, to prepare carbon nanotube base film; wherein, the pressure of the pressing roller is 0.4MPa, the moving speed of the pressing roller is 2m / min; the drying temperature is 150°C.

[0075] The obtained carbon nanotube base film is double-sided coated with carbon nanotube slurry through a small roll-to-roll doctor blade casting coating roll system; wherein, according to the mass ratio, the carbon nanotube slurry ratio is: 10 % of carbon nanotubes, 3.2% of PVP; 2.5% of PVDF and the remainder of NMP; the viscosity of the carbon nanotube slurry is 7558cp; the blade coating thickness is 200 μm; the blade coating speed is 0.2m / min , the dryi...

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Abstract

The invention discloses a preparation method of a composite carbon nanotube film, the composite carbon nanotube film and a layered heating device. The preparation method of the composite carbon nanotube film comprises the following steps that a carbon nanotube base film (120) is obtained, the carbon nanotube base film (120) comprises a layer of carbon nanotube film or a plurality of layers of stacked carbon nanotube films, and the carbon nanotube films are provided with first carbon nanotubes arranged in an oriented mode; obtaining carbon nanotube slurry, wherein the carbon nanotube slurry comprises a solvent, and a second carbon nanotube and a binder which are uniformly dispersed in the solvent; and coating the surface of the carbon nanotube base film (120) with carbon nanotube slurry, and removing the solvent in the carbon nanotube slurry to prepare the composite carbon nanotube film. According to the composite carbon nanotube film prepared by the preparation method, an oriented carbon nanotube film is successfully adopted as a base material, and the conductivity of the composite carbon nanotube film is obviously higher than that of a traditional carbon nanotube film.

Description

technical field [0001] The present application relates to the technical field of carbon materials, in particular to a composite carbon nanotube film, its preparation method and a layered heating device. Background technique [0002] Carbon nanotubes are a typical one-dimensional nanomaterial with extremely high strength, electrical conductivity and thermal conductivity in the length direction of carbon nanotubes. However, in many application scenarios, carbon nanotubes often need to be further made into macroscopic products before they can be used further, such as carbon nanotube films further prepared from many carbon nanotubes. Carbon nanotube film has many advantages such as light weight, high strength, free bending, cutting into any shape, small footprint, high temperature resistance, corrosion resistance, long service life, not easy to deform under high temperature, and high thermal conductivity. Thanks to its good electrical and thermal conductivity, carbon nanotube f...

Claims

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Application Information

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IPC IPC(8): C01B32/168C09K5/14C09D127/16C09D139/06C09D7/61
CPCC01B32/168C09K5/14C09D127/16C09D7/61C08L39/06C08K3/041
Inventor 刘畅辛培培张玲王峰邓飞
Owner SHENZHEN XIWAN TECH CO LTD
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