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Transfer method of graphene or oxidized graphene thin film

A technology of graphene film and transfer method, which is applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems that are difficult to meet industrial large-scale preparation, and achieve the effect of reducing transfer cost, easy operation and strong applicability

Inactive Publication Date: 2013-05-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also difficult to meet the needs of industrialized large-scale preparation

Method used

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  • Transfer method of graphene or oxidized graphene thin film
  • Transfer method of graphene or oxidized graphene thin film
  • Transfer method of graphene or oxidized graphene thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Graphene oxide films transferred to glass substrates

[0037] Such as figure 1 As shown in the flow chart, spread the undried film on the flexible substrate on the target substrate, then squeeze the air bubbles between the film and the target substrate, and then use an extruder to squeeze the flexible substrate and the target substrate, so that The film is in close contact with the target substrate, and then the film is formed on the target substrate. At this time, the film is an air-dried film, and then the flexible substrate is removed, so that the air-dried film adheres to the target substrate.

[0038] The 1 mg / ml graphene oxide solution was centrifuged at 14,000 rpm for 10 minutes, then reduced at a voltage of 20v for one hour, and the resulting solution was redispersed by ultrasonication after adjusting its pH to 10 with ammonia water. The polyvinylidene fluoride membrane with a pore size of 0.25um is used to form a film in a vacuum filtration device. First, quic...

Embodiment 2

[0040] Graphene films transferred to glass substrates

[0041] Such as figure 1 As shown in the flow chart, firstly, a 0.1mg / ml graphene oxide solution is formed into a film in a vacuum filtration device with a pore size of 0.45um water-based mixed fiber membrane as a flexible substrate; then the membrane is quickly removed from the vacuum filtration device Gently peel it off, and quickly spread the side with the film on the glass substrate; when the film is not dry, then quickly squeeze it with a brush to remove air bubbles, and then place it on a glass substrate such as figure 2 After the extrusion is completed, the mixed fiber film can be removed by hand or tweezers to realize the transfer of the graphene oxide film. Figure 4It is a scanning electron microscope image of a graphene film transferred onto a glass substrate. It can be seen from the figure that when using the transfer method of the present invention, the obtained film is relatively uniform and complete, and t...

Embodiment 3

[0043] Graphene oxide films were transferred onto a flexible substrate PET.

[0044] Such as figure 1 As shown in the flowchart, firstly, a 0.05mg / ml graphene oxide solution is formed into a film in a vacuum filtration device with a pore size of 0.25um water-based mixed fiber membrane as a flexible substrate; then the membrane is quickly removed from the vacuum filtration device. Gently peel it off, and quickly spread the side with the film on the PET substrate; when the film is not dry, then quickly squeeze it with a brush to remove air bubbles, and then place it on such as figure 2 After the extrusion is completed, the mixed fiber film can be removed by hand or tweezers to realize the transfer of the graphene oxide film.

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Abstract

The invention relates to a transfer method of a graphene or oxidized graphene thin filma, which is used for transferring the graphene or oxidized graphene thin film from a flexible substrate to a target substrate and comprises the following steps: cleaning the target substrate, and performing drying treatment for later use; performing activation treatment to the target substrate to add hydroxy onto the surface of the target substrate; forming a thin film on one side of the flexible substrate in a vacuum suction filtration device; tiling the side of the flexible substrate with the thin film on the target substrate in 30 s in moist atmosphere; squeezing the side of the flexible substrate without the thin film by using a brush to preclude the vesicles between the thin film and the target substrate; fast squeezing the flexible substrate and the target substrate by using an extruder before the thin film is dried to enable the thin film and the target substrate to be in full contact; and slowly tearing off the flexible substrate to transfer the thin film from the flexible substrate to the target substrate. Compared with the prior art, the method is simple to operate, the repeatability is good, no impurity is introducedand no organic matter is used.

Description

technical field [0001] The invention belongs to the technical field of functional thin films, and relates to a transfer method of a graphene film, specifically a method for transferring a graphene film from a prepared substrate to a target substrate. Background technique [0002] In 1907, Badeker and others prepared CdO transparent conductive films (Transparentconducting films, TCFs) by sputtering. The research on TCFs has experienced ITO (Sn-doped In2O3-based thin film) in the 1960s, transparent conductive multilayer films in the 1970s, and doped ZnO in the 1980s. In recent years, with the advancement of science and technology and the discovery of new materials, new types of carbon nanotube TCFs and graphene TCFs have emerged. After graphene was successfully prepared in 2004, compared with the widely used ITO and FTO (F-doped SnO 2 Base film) and AZO (Al-doped ZnO-based film) materials, which have the characteristics of high light transmittance (97.5% theoretical value), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/194C01B32/198
Inventor 张东李秀强尚玉刘琳
Owner TONGJI UNIV
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