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Conductive carbon film based on graphene as well as preparation method and application

A conductive carbon film, graphene technology, applied in conductive coatings, chemical instruments and methods, nanotechnology for materials and surface science, etc. , to achieve the effect of simple process, easy heat dissipation and low cost

Inactive Publication Date: 2009-07-08
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To grow these two types of films on various substrates, these substrate materials must be placed in special instruments, and can withstand special conditions such as arc, plasma, high temperature, high pressure or high vacuum when preparing carbon films by vapor deposition. Therefore, it is difficult to use this method to prepare carbon films on less stable substrates such as polymers
In addition, limited by the capacity of the instrument cavity, it is difficult to prepare a carbon film on a substrate with a large size or a complex shape.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Universal conductive carbon film based on single-layer graphene

[0030]Single-layer graphene was prepared by chemical oxidation method. 10 g of graphite and 7 g of sodium nitrate (analytical pure) were added to the flask, and then 500 mL of concentrated sulfuric acid (analytical pure) was added. Afterwards, in an ice-water bath, slowly add 40 g of potassium permanganate while stirring, and the addition time is controlled at 2 hours, and then kept for 2 hours to cool down to room temperature. After stirring at room temperature for 10 days, the reaction solution first turned green, then dark brown, and finally brick brown, and became viscous. The reaction solution was slowly added to 1000 mL of 5 wt % dilute sulfuric acid, the addition time was controlled at 2 h, stirring was kept, and the temperature was controlled at 98°C. The reaction solution was stirred at this temperature for another 2 h, and then cooled to 60 °C. Add 30 mL of hydrogen peroxide (30% a...

Embodiment 2

[0034] Example 2: Transparent conductive carbon film based on single-layer graphene

[0035] Single-layer graphene was prepared according to the method of Example 1. Add 1 g of single-layer graphene into water, and process it with 500W ultrasonic wave for 30 minutes to completely dissolve it.

[0036] The single-layer graphene aqueous solution is formed into a film on the surface of the cleaned quartz plate (15×15×3mm) by the method of spin coating, and placed at room temperature for 48h; then the single-layer graphene film loaded on the quartz plate is placed in an airtight container , fumigated with hydrazine hydrate (98%, Alfa Aesar) steam for 24h; a single-layer graphene film reduced by hydrazine steam was obtained. The single-layer graphene film reduced by hydrazine vapor was placed in a tube furnace, and baked at 400°C for 3 hours under the protection of nitrogen to obtain a transparent and conductive single-layer graphene carbon film; in addition, the hydrazine vapor r...

Embodiment 3

[0039] Example 3: Multilayer Graphene-based Universal Conductive Carbon Film

[0040] Multilayer graphene was prepared according to the method reported in the literature (Carbon, 2004, 42, 2929), and the obtained product was centrifuged to obtain a mixture of 2-5 layers of graphene. Add 1 g of multilayer graphene into water, and process it with 500W ultrasonic wave for 60 minutes to completely dissolve it. 0.5 g of sodium borohydride was added, stirred, and reacted at 80° C. for 2 h, the solution turned from brown to black, and a reduced graphene dispersion was obtained.

[0041] The above-mentioned graphene dispersion is formed into a film on the surface of the cleaned glass substrate (10×10cm) by pouring, and placed at room temperature for 48h, and then the graphene film loaded on the glass substrate is placed under nitrogen protection at 400 ° C. Roasting 3h, obtains the conductive multilayer graphene carbon film, and its conductivity is 2×10 2 S / cm.

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Abstract

The invention relates to a general conductive carbon film based on Graphene and a preparation method. The method for preparing the carbon film mainly comprises the following steps: (1) preparing water-soluble single-layer or multi-layer grapheme; (2) preparing organic soluble single-layer or multi-layer Graphene; (3) shaping the solution (or dispersion liquid) containing the Graphene in 1 or 2 by methods of spin coating, spraying, soaking or casting and the like to prepare a film based on the single-layer or multi-layer Graphene; and (4) chemically reducing or roasting the film obtained in 3 to prepare the carbon film based on the single-layer or multi-layer Graphene. The method can be used for preparing the carbon film on various matrixes such as steel, glass, ceramics, quartz, carbon materials, organic substances and the like.

Description

technical field [0001] The invention relates to the field of carbon materials, in particular to a conductive carbon film based on graphene, a preparation method and an application thereof. The single-layer or multi-layer graphene conductive carbon film has good electrical conductivity, thermal conductivity and mechanical properties, low production cost, simple preparation method, no need for large and complex instruments, and can prepare samples of various sizes and shapes. It has good application prospects in traditional fields such as machinery, construction, and medical treatment, as well as in high-tech fields such as precision instruments, microelectronics, and aerospace. Background technique [0002] Carbon ranks sixth in the periodic table of elements and is a very common element in nature. The biggest characteristic of carbon is the existence of many allotropes, thus forming structures and Carbon materials with completely different properties. [0003] Carbon film...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/02B32B9/00C09D1/00C09D5/24B05D3/00B05D3/10C01B31/04C09D7/62
CPCH01B1/04C08K3/04C09D7/1225C23C18/16C09D5/24C23C18/1204C23C18/1662C01B31/0484B82Y40/00C23C18/1295B82Y30/00C09D7/1291C01B32/194C09D7/62C09D7/70
Inventor 陈永胜黄毅
Owner NANKAI UNIV
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