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Preparation method for laminated graphene conductive film

A graphene film, laminated graphene technology, applied in cable/conductor manufacturing, conductive layers on insulating carriers, circuits, etc., can solve the problems of low utilization rate of raw materials, high heat treatment temperature, poor reduction effect, etc. High efficiency, mild reduction temperature, and improved conductivity

Inactive Publication Date: 2010-05-05
南京南工维明新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, they have the disadvantages of poor reduction effect, high heat treatment temperature, immersion in liquid and low utilization rate of raw materials.

Method used

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  • Preparation method for laminated graphene conductive film
  • Preparation method for laminated graphene conductive film
  • Preparation method for laminated graphene conductive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: The preparation method of low sheet resistance reduced graphene oxide conductive film.

[0033] Graphene oxide preparation: 2.5g graphite, 1.9g NaNO 3 , 11.5g KMnO 4 and 85ml concentrated H 2 SO 4 After mixing, stir in an ice bath for 1 hour, then stir at room temperature for 2 days, and finally add 250ml of 5wt%-1-concentrated sulfuric acid and 20ml of 30wt% H 2 o 2 Continue to stir for 2 days, centrifuge, and wash with deionized water, repeating this 3 times to obtain graphene oxide.

[0034] Preparation and reduction of graphene oxide film: prepare 0.05mg / ml graphene oxide ultrasonic dispersion, and then centrifuge to remove a small amount of large particles. First take 50ml, 100ml, and 150ml of the above solutions to prepare films by vacuum filtration, denoted as G(50), G(100), and G(150), and transfer 4 equal parts of each filter film to a glass substrate. Then select HydraVer 2 hydrazine as a strong reducing agent and wet the surface of the gra...

Embodiment 2

[0035] Embodiment 2: The preparation method of the reduced graphene oxide conductive film with controllable sheet resistance.

[0036] Here, a graphene oxide film with a filtration volume of 50 ml and a density of 0.05 mg / ml is selected as a single-layer film. On the basis of the reduced graphene oxide film with a filtration volume of 50 ml prepared in Example 1, transfer and superimpose a second layer of graphene oxide film of equal thickness. Then adopt the reduction method in embodiment 1 to reduce the second layer of graphene oxide film. A similar method was used to prepare three-layer stacked reduced graphene oxide conductive films. The four-probe test shows that the sheet resistance of the double-layer stacked reduced film is approximately equal to the sheet resistance of the reduced graphene oxide film with a filtration volume of 100ml in Example 1, indicating that the contact between the stacked films is good and the reduction is uniform and equivalent, theoretically ...

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Abstract

A preparation method for laminated graphene conductive film belongs to the technical field of nano-zided photoelectric material. The invention in particular relates to a graphene film with wetting reduction oxidation at the temperature of 60-200 DEG C and a preparation method for forming film through lamination several times. The laminated reduction-oxidation graphene film provided by the invention has the following advantages: (1) the utilization rate of raw material is high; (2) the reduction temperature is moderate; (3) the electric conductivity is high; (4) the square resistance is low and controllable; (5) the cost is low. The invention is widely applied to organic photoelectric functional devices such as organic electroluminescent display, organic electric storage and artificial muscle; and the film is expected to become a novel conductive film in place of the ITO and conductive polymer film applied to flexible device.

Description

technical field [0001] The invention belongs to the technical field of nano photoelectric materials. It specifically relates to a reduction method of a graphene oxide conductive thin film and a preparation technology for multiple stacked film formation, which are widely used in conductive thin films and photoelectric functional devices. technical background [0002] Conductive thin films are widely used in many fields, such as electrodes of functional devices such as electric storage, light-emitting diodes, artificial muscles, and solar cells. Currently, the most common electrodes are metal oxide thin films based on traditional inorganic materials, such as ITO, IZO, etc. However, with the increasing scarcity of rare metals, the price is becoming more and more expensive, and their brittleness further limits their large-scale application in the field of optoelectronic functional devices, especially flexible organic optoelectronic functional devices. Therefore, the developmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B5/14C01B31/04
Inventor 黄维解令海刘举庆凌海峰赵飞凌安平
Owner 南京南工维明新材料科技有限公司
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