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Ultrathin film of transparent high-strength and high-conductivity electrical self-supporting carbon nano-tube and preparation method thereof

A carbon nanotube film, carbon nanotube technology, which is applied in cable/conductor manufacturing, conductors, circuits, etc. Support film and other issues to achieve excellent comprehensive mechanical properties, improved electrical conductivity and strength, and easy operation.

Inactive Publication Date: 2011-06-29
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing carbon nanotube-containing films generally have poor electrical conductivity, strength and other properties, and have low transparency, and they all need to be attached to the substrate, so they cannot form a self-supporting film and cannot be transferred to the required substrate. greatly affects its performance
Although it has been reported that transparent carbon nanotube films have been prepared, the sources of ultra-long carbon nanotubes (on the order of centimeters in length) used in them are limited, and the modification method of carbon nanotubes has seriously affected the high strength, Exercising high electrical conductivity

Method used

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  • Ultrathin film of transparent high-strength and high-conductivity electrical self-supporting carbon nano-tube and preparation method thereof
  • Ultrathin film of transparent high-strength and high-conductivity electrical self-supporting carbon nano-tube and preparation method thereof
  • Ultrathin film of transparent high-strength and high-conductivity electrical self-supporting carbon nano-tube and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0058] (1) Take 3 mg of single-walled carbon nanotube powder and place it in 300 ml of water, and add 3 mg of SDBS. The obtained mixture was ultrasonicated for 30 minutes in an ultrasonic water bath with a power of 270w, and then transferred to a high-energy ball mill for ball milling at a speed of 300rpm for 7 days to obtain a dispersed carbon nanotube aqueous solution. The prepared single-walled carbon nanotube dispersion was subjected to ultrahigh-speed centrifugation at a speed of 20,000 rpm for 30 minutes. The supernatant was collected for the following experiments.

[0059] (2) Dilute the carbon nanotube dispersion obtained in step 1 by 50 times, and continue shaking for 30 minutes. Measure 1ml of the above solution, dilute it 20 times, shake well, and filter it through a mixed fiber membrane with a pore size of 450nm to form a membrane. After the filter membrane is dry, place it in acetone. After the mixed fibers are dissolved, a high-strength transparent self-support...

Embodiment 2

[0062] (1) Take 30 mg of single-walled carbon nanotube powder and place it in 300 ml of water, add 30 mg of SDBS and 15 mg of PVP. The resulting mixture was sonicated for 1 h in an ultrasonic water bath with a power of 100 w, and then transferred to a high-energy ball mill for ball milling at a speed of 800 rpm for 1 day to obtain a dispersed carbon nanotube aqueous solution. The prepared single-walled carbon nanotube dispersion was subjected to ultrahigh-speed centrifugation at a speed of 20,000 rpm for 30 minutes. The supernatant was collected for the following experiments.

[0063] (2) Dilute the carbon nanotube dispersion obtained in step 1 by 20 times, and continue shaking for 30 minutes. Measure 1ml of the above solution, form a layer of transparent film on the glass base by spin coating, put the glass base in water or 5M nitric acid, the carbon nanotube film will automatically fall off from the glass and float on the liquid surface, A self-supporting carbon nanotube c...

Embodiment 3

[0066] (1) Take 3 mg of single-wall carbon nanotube powder and 2 mg of multi-wall carbon nanotube powder, put them in 300 ml of water, and add 3 mg of SDBS. The resulting mixture was ultrasonicated for 200 min in an ultrasonic water bath with a power of 270w, and then transferred to a high-energy ball mill for ball milling at a speed of 300 rpm for 5 days to obtain a dispersed carbon nanotube aqueous solution. The prepared single-walled carbon nanotube dispersion was subjected to ultrahigh-speed centrifugation at a speed of 20,000 rpm for 30 minutes. The supernatant was collected for the following experiments.

[0067] (2) Dilute the carbon nanotube dispersion obtained in step 1 by 50 times, and continue shaking for 30 minutes. Measure 1ml of the above solution, dilute it 20 times, shake well, and filter it through a mixed fiber membrane with a pore size of 450nm to form a membrane. After the filter membrane is dry, place it in acetone. After the hybrid fibers are dissolved,...

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Abstract

The invention relates to an ultrathin film of a transparent high-strength and high-conductivity electrical self-supporting carbon nano-tube and a preparation method thereof. The ultrathin film mainly comprises a network consisting of interweaved carbon nano-tubes, and the application amount of the carbon nano-tubes is 0.01-0.7 mg / cm<2>; and the thickness of the film is more than 10nm, the light transmittance of the film is 50-97%, the electrical conductivity of the film is 30-500 MS / m, the tensile strength of the film can be as high as 2000MPa, and the ultrathin film has a larger area. The ultrathin film is prepared from single-walled and / or double-walled and / or multi-walled carbon nano-tubes through the steps of filtering, printing, coating and the like so as to form films, and then stripping from the formed films so as to from self-supporting films. The ultrathin film of the self-supporting carbon nano-tube provided by the invention has ultrahigh mechanical properties and excellent electronic and optical properties, therefore, the ultrathin film can be widely applied to the technical field of photoelectricity; and meanwhile, the ultrathin film is simple in process, easy to operate, good in controllability, safe and environmental-friendly, and can be prepared by using merchant carbon nano-tubes as raw materials, therefore, the ultrathin film is wide in material source and low in cost and is suitable for the industrial production on large-batch and large-area ultrathin film preparation.

Description

technical field [0001] The invention relates to a transparent conductive film and a preparation method thereof in the field of photoelectric technology, in particular to a carbon nanotube ultra-thin film with high strength, high conductivity and high transparency and a preparation method thereof. Background technique [0002] Transparent conductive films have very important applications in fields such as display, lighting, photovoltaic cells, touch screens, and field effect transistors. The current transparent conductive films usually use inorganic materials such as ITO, because these materials often need to use the rare metal indium that is decreasing on the earth, and their processing often requires high temperature and high vacuum conditions, which leads to the use of such materials. High cost; in addition, these glass-like materials cannot be used for flexible displays. Researching alternatives to traditional transparent conductive films is an important topic of current...

Claims

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Application Information

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IPC IPC(8): H01B5/00H01B1/04H01B13/00
Inventor 靳健陈新江石准
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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