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Carbon nanotube transparent conductive film and preparation method thereof

A technology of transparent conductive film and carbon nanotubes, which is applied in the direction of nanotechnology, nanotechnology, and equipment for manufacturing conductive/semiconductive layers, etc., can solve the problems that it is difficult to realize conductivity and transparency at the same time, and achieve stable conductivity. Effect of high transparency and improved usability

Inactive Publication Date: 2020-09-25
SHENZHEN XIWAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a carbon nanotube transparent conductive film and a preparation method thereof, aiming at solving the problem that it is difficult to simultaneously improve the conductivity and transparency due to the multiple influences of the preparation process when preparing the carbon nanotube conductive film by wet method question

Method used

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  • Carbon nanotube transparent conductive film and preparation method thereof
  • Carbon nanotube transparent conductive film and preparation method thereof

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preparation example Construction

[0063] In view of this, the first aspect of the embodiment of the present application provides a method for preparing a carbon nanotube transparent conductive film, comprising the following steps:

[0064] S01. Dispersing carbon nanotubes in a solvent containing a dispersant to prepare a carbon nanotube dispersion;

[0065] S02. Centrifuge the carbon nanotube dispersion and take the supernatant; add a film-forming aid to the supernatant and mix it to obtain a carbon nanotube solution, wherein the film-forming aid is selected from transparent and conductive film-forming aids;

[0066] S03. Depositing the carbon nanotube solution on the substrate, drying, and cleaning to prepare a carbon nanotube transparent conductive film.

[0067] In the preparation method of the carbon nanotube transparent conductive film provided in the embodiment of the present application, after the carbon nanotube dispersion is centrifuged, a film-forming aid is added to the collected supernatant. On t...

Embodiment 1

[0127] A method for preparing a carbon nanotube transparent conductive film, comprising the following steps:

[0128] S11. Add 2 g of polyacrylic acid to 97.9 mL of water, mix well, add 100 mg of acidified carbon nanotubes (CNTs), and disperse them ultrasonically for 12 hours to obtain a carbon nanotube dispersion; wherein, the length of the CNTs is 100 μm;

[0129] S12. Centrifuge the above-mentioned carbon nanotube dispersion for 90 minutes at a rotational speed of 12000r / min to obtain a layered carbon nanotube dispersion, take the supernatant to obtain a clarified carbon nanotube dispersion; the clarified carbon nanotube 100 mg of polyurethane was added to the dispersion liquid under low-speed stirring to obtain a pre-film-forming solution of carbon nanotubes.

[0130] S13. Take a piece of PET substrate, set the distance between the scraper and the substrate to 20 μm, scrape the above-mentioned carbon nanotube film-forming solution on the surface of the substrate, dry it at...

Embodiment 2

[0132] A method for preparing a carbon nanotube transparent conductive film, comprising the following steps:

[0133] S21. Add 2 g of polyacrylic acid to 97.95 mL of water, mix well, add 50 mg of acidified CNT, and ultrasonically disperse for 12 hours to obtain a carbon nanotube dispersion; wherein, the length of the CNT is 100 μm;

[0134] S22. Centrifuge the above-mentioned carbon nanotube dispersion for 90 minutes at a rotational speed of 12000r / min to obtain a layered carbon nanotube dispersion, take the supernatant to obtain a clarified carbon nanotube dispersion; the clarified carbon nanotube 100 mg of polyurethane was added to the tube dispersion liquid under low-speed stirring to obtain a pre-film-forming solution of carbon nanotubes.

[0135] S23. Take a piece of PET substrate, set the distance between the scraper and the substrate to be 20 μm, scrape and coat the above-mentioned carbon nanotube film-forming solution on the surface of the substrate, dry it at 80° C., ...

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Abstract

The invention relates to the technical field of conductive films, and provides a preparation method of a carbon nanotube transparent conductive film. The method comprises the following steps of dispersing carbon nanotubes in a solvent containing a dispersing agent to prepare a carbon nanotube dispersion liquid; carrying out centrifugal treatment on the carbon nanotube dispersion liquid, and takinga supernatant, wherein a coalescing agent is selected from a transparent and conductive coalescing agent; adding a coalescing agent into the supernatant and carrying out mixing treatment to obtain acarbon nanotube solution; and depositing the carbon nanotube solution on a substrate, drying, and cleaning to prepare the carbon nanotube transparent conductive film. The carbon nanotube transparent conductive film prepared by the method provided by the invention has lower resistance and higher transparency, and is suitable for being applied to the fields of touch screens, displays, solar cells and the like.

Description

technical field [0001] The invention belongs to the technical field of conductive films, in particular to a carbon nanotube transparent conductive film and a preparation method thereof. Background technique [0002] Transparent conductive film is an important optoelectronic material, which has a wide range of applications in touch screens, displays, solar cells and other fields. Indium tin oxide (ITO) thin film has attracted widespread attention due to its low resistivity, transmittance of over 90%, and good stability and compatibility in dry or humid environments, and has become the most commonly used transparent film. conductive film. However, indium in ITO is a rare material with low total reserves and high cost, and the low curvature and poor flexibility of ITO limit its application in flexible devices, stretchable devices, and wearable electronic devices. Therefore, finding flexible and low-cost transparent conductive film materials has become a research hotspot. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B1/24H01B5/14B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01B1/24H01B5/14H01B13/0026
Inventor 李昌林
Owner SHENZHEN XIWAN TECH CO LTD
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