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Method for manufacturing conductive graphene film through ink-jet printing

A conductive film and inkjet printing technology, which is applied to the conductive layer, circuit, and electrical components on the insulating carrier, can solve problems such as unsatisfactory performance, decreased electrical conductivity, and inability to fully restore the electronic structure of graphene. The effect of uniform distribution, low cost and short cycle

Inactive Publication Date: 2014-06-04
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported that reduced graphene oxide is used in organic thin film transistor electrodes, temperature and chemical sensors, etc. by inkjet printing. Satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Measure and mix 50ml of ethanol and 50ml of dimethylformamide, add 1g of ethyl cellulose, and add 3g of graphite into ethyl cellulose (EC) / ethanol / dimethylformamide organic solvent; ultrasonic treatment for 60 minutes, power 100W, temperature 4-6°C; high-speed centrifugation at 10,000 rpm for 40 minutes, take the upper layer liquid, add 25ml NaCl aqueous solution (0.05g / ml) for flocculation, and obtain graphene powder after filtration; disperse the graphene powder in an organic solvent (cyclohexane The ratio of ketone to terpineol is 60:40), and it is made into inkjet ink, and the viscosity is adjusted to 10mPa·s, and the surface tension is 30mNm -1 ; Inject the ink into the ink cartridge, and deposit it on the pre-treated PI substrate according to the predetermined pattern using conventional inkjet printing technology; dry the conductive film deposited on the substrate in an oven, and heat-treat it at 300°C for 20 minutes to form graphite vinyl conductive film.

[002...

Embodiment 2

[0027] Measure and mix 30ml of ethanol with 70ml of dimethylformamide, add 2g of ethyl cellulose, and add 5g of graphite into ethyl cellulose (EC) / ethanol / dimethylformamide organic solvent; ultrasonic treatment for 80 minutes, power 200W, temperature 4-6°C; high-speed centrifugation at 10,000 rpm for 90 minutes, take the upper layer liquid, add 50ml NaCl aqueous solution (0.05g / ml) for flocculation, and obtain graphene powder after filtration; disperse the graphene powder in an organic solvent (cyclohexane The ratio of ketone and terpineol is 70:30), and it is made into inkjet ink, and the viscosity is adjusted to 15mPa·s and the surface tension is 35mNm -1 ; Inject the ink into the ink cartridge, and deposit it on the pre-treated PI substrate according to the predetermined pattern using conventional inkjet printing technology; dry the conductive film deposited on the substrate in an oven, and heat-treat at 250°C for 30 minutes to form graphite vinyl conductive film.

[0028]...

Embodiment 3

[0030] Take 80ml of ethanol and 20ml of dimethylformamide and mix them, add 1.5g of ethyl cellulose, take 4g of graphite and add it to ethyl cellulose (EC) / ethanol / dimethylformamide organic solvent; ultrasonic treatment for 80 minutes, Power 150W, temperature 4-6°C; high-speed centrifugation at 10,000 rpm for 60 minutes, take the upper layer liquid, add 40ml NaCl aqueous solution (0.05g / ml) for flocculation, and obtain graphene powder after filtration; disperse the graphene powder in an organic solvent (ring The ratio of hexanone to terpineol is 85:15), and it is made into inkjet ink, and the viscosity is adjusted to 12mPa·s, and the surface tension is 30mNm -1 ;Inject the ink into the ink cartridge, and deposit it on the pre-treated PET substrate according to the predetermined pattern using conventional inkjet printing technology; dry the conductive film deposited on the substrate in an oven, and heat-treat at 200°C for 30 minutes to form graphite vinyl conductive film.

[0...

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Abstract

The invention relates to a method for manufacturing a conductive film, in particular to a method for manufacturing a conductive graphene film through ink-jet printing. Graphite or graphite derivatives are used as raw materials and ultrasonically separated in dispersant / ethyl alcohol / dimethylformamide solvent to prepare graphene dispersion solution, and supernatant liquid is taken through centrifugation, and graphene powder is obtained after the supernatant liquid undergoes flocculation; the graphene powder is prepared into printing ink, the printing ink is injected into an ink box, and the printing ink is deposited on a preprocessed substrate according to a preset pattern through the ink-jet printing technology; the conductive graphene film is formed through thermal treatment at 200 DEG C to 350 DEG C. According to the method, the graphene is prepared through the liquid phase separation method, and the conductive graphene film is manufactured through the ink-jet printing technology. The manufactured film can be patterned and is high in electric conductivity and good in mechanical property. Equipment used for ink-jet printing is simple, operation does need to be performed according to an original template, complex patterns are easy to make, cost is low, and the method is expected to be used for replacing existing complex film coating and photoetching technologies under certain conditions.

Description

technical field [0001] The invention relates to a method for preparing a conductive film, in particular to a method for preparing a graphene conductive film by inkjet printing. Background technique [0002] Flexible electronics is an emerging electronic technology that makes organic / inorganic material electronic devices on flexible / ductile plastic or thin metal substrates. National defense and other fields have broad application prospects, such as flexible electronic displays, organic light-emitting diodes (OLEDs), printed RFID, thin-film solar panels, and surface-mounting for electronics. Micropatterning processing technology is a necessary means to realize flexible electronic devices and their integrated processing. Traditional electronic manufacturing processes such as photolithography and sputtering have problems such as expensive equipment, complex processes, and large environmental pollution. Using printing technologies such as inkjet printing, gravure printing, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/14H01B13/00
Inventor 张辉张政魏秋芳杨雪松胡晓东
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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