Graphene conductive ink as well as preparing method and application thereof

A technology of conductive ink and graphene, which is applied in applications, inks, household appliances, etc., can solve the problems of affecting the conductivity of conductive ink, complicated operation process, and increased cost.

Active Publication Date: 2017-03-22
CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Precious metals generally have good conductivity and are not easily oxidized, but if a large amount of precious metals are used, the production cost will increase; while base metals are relatively easy to oxidize, and the oxidation of the metal will affect the conductivity of the conductive ink
In addition, the sintering of the base metal paste is generally carried out under nitrogen or vacuum conditions, which will increase the cost and complicate the operation process

Method used

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  • Graphene conductive ink as well as preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve 1g of ethyl cellulose in 100ml of ethanol. After dissolving, add 5g of graphite flakes to the above solution for 4 hours of ultrasonication, take the upper layer solution and centrifuge at 7500 rpm for 15 minutes, and dilute the upper layer liquid after centrifugation by 10 times Then centrifuge at 11000 rpm for 2 hours, pour off the upper liquid, disperse the centrifuged precipitate in 100ml of ethanol, add 1ml of terpineol and 9ml of cyclohexanone, at 50 rpm, 50°C The alcohol was evaporated to dryness under the conditions to obtain a high-concentration graphene conductive ink, the content of graphene was 10mg / ml, and the viscosity was 18cps. The conductive ink is used for 3D inkjet printing of electronic circuits. After sintering at 250°C, the square resistance is 98Ω / □.

Embodiment 2

[0034] Dissolve 1g of hydroxyethyl cellulose in 100ml of water. After dissolving, add 5g of graphite flakes to the above solution and ultrasonicate for 4 hours, take the upper layer solution and centrifuge at 7500 rpm for 15 minutes, and dilute the upper layer liquid after centrifugation by 10 times Then centrifuge at 11000 rpm for 2 hours, pour off the upper liquid, disperse the centrifuged precipitate in 100ml of ethanol, add 1ml of terpineol and 9ml of cyclohexanone, at 50 rpm, 50°C The alcohol was evaporated to dryness under the conditions to obtain a high-concentration graphene conductive ink, the content of graphene was 10mg / ml, and the viscosity was 18cps. The conductive ink is used for 3D inkjet printing of electronic circuits. After sintering at 250°C, the square resistance is 98Ω / □.

Embodiment 3

[0036] Dissolve 2g of ethyl cellulose in 100ml of ethanol. After dissolving, add 10g of graphite flakes to the above solution for ultrasonication for 4 hours, take the upper layer solution and centrifuge at 7500 rpm for 15 minutes, and dilute the upper layer liquid after centrifugation by 10 times Then centrifuge at 11000 rpm for 2 hours, pour off the upper liquid, disperse the centrifuged precipitate in 100ml of ethanol, add 1ml of terpineol and 9ml of cyclohexanone, at 50 rpm, 50°C The alcohol was evaporated to dryness under the conditions to obtain a high-concentration graphene conductive ink, the content of graphene was 15mg / ml, and the viscosity was 25cps. The conductive ink is used for 3D inkjet printing of electronic circuits. After sintering at 250°C, the square resistance is 90Ω / □.

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Abstract

The invention discloses graphene conductive ink as well as a preparing method and an application thereof. The preparing method comprises the following steps: 1, ultrasonically dispersing a dispersant and a graphite flake in a first solution so as to obtain a mixture A; 2, carrying out first centrifuging on the mixture A, and carrying out secondary centrifuging on upper-layer dispersion liquid which is obtained after first centrifuging so as to obtain precipitates B; 3, dispersing the precipitates B in a second solvent so as to obtain dispersion liquid C; 4, adding solvents and additives for the conductive ink into the dispersion liquid C; and 5, removing the second solvent so as to obtain the graphene conductive ink. In the method, the graphene is obtained through in-situ preparation, so that the influence of graphene flaws on conductive performance is avoided. The graphene conductive ink which is high in concentration and high in conductivity can be obtained.

Description

technical field [0001] The invention relates to a graphene conductive ink and a preparation method and application thereof, belonging to the fields of electronic information materials and printed electronics. Background technique [0002] Conductive ink is the basis for the development of electronic components, the key material for packaging, electrodes and interconnection, and a high-tech electronic functional material integrating metallurgy, chemical industry, and electronic technology. It is mainly used to manufacture thick-film integrated circuits, thin-film Transistors (TFTs), sensors, organic photovoltaics, solar cells, flexible displays, radio frequency identification tags (RFID), wearable electronics and memory in various areas of the electronics industry. The conductive filler in conductive ink is generally composed of noble metals Au, Ag or base metals Cu, Ni, Al, etc. Precious metals generally have good electrical conductivity and are not easily oxidized, but if ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52
CPCC09D11/52
Inventor 邓吨英石珉滈冯烁王洋
Owner CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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