Graphene based conductive ink and preparation method thereof as well as flexible conductive thin film

A conductive ink and graphene-based technology, which is applied to inks, conductive layers on insulating carriers, household appliances, etc., can solve the problems of conductive inks such as easy agglomeration, high contact resistance, and poor dispersion, and achieve good conductive effect and easy printing , the effect of not easy to reunite

Active Publication Date: 2013-04-03
NINGBO GRAPHENE INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, graphene has a sheet structure, and the contact resistance between the sheets is relatively large. The conductive ink prepared with it as a conductive filler is easy to agglomerate and has poor dispersion, so the resistance is large and the conductivity is poor.

Method used

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  • Graphene based conductive ink and preparation method thereof as well as flexible conductive thin film
  • Graphene based conductive ink and preparation method thereof as well as flexible conductive thin film

Examples

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preparation example Construction

[0044] The invention discloses a preparation method of graphene-based conductive ink, comprising the following steps:

[0045] (A) Dispersing the pH regulator in the solvent to obtain a uniform first mixed solution; the pH regulator is one of triethanolamine, dimethylformamide and ammonia water with a mass concentration of 25% to 27% or various;

[0046] (B) mixing the first mixed liquid with a binder to obtain a second mixed liquid;

[0047] (C) mixing the second mixed solution with conductive components and additives to obtain a graphene-based conductive ink; the conductive components include graphene sheets loaded with metal particles or metal sheets, and the metal particles are deposited or Dispersed in graphene sheets.

[0048] In the present invention, the graphene-based conductive ink is prepared from conductive components, solvents, binders and pH regulators.

[0049]The conductive component includes graphene sheets loaded with metal particles or metal sheets. The ...

Embodiment 1

[0061] Weigh 0.001mol / L of AgNO 3 Solution 1000mL, add 20g graphene powder, stir evenly, add 1g polyvinylpyrrolidone, add 10ml concentration of 0.1mol / L ammonia water to carry out silver mirror reaction until the precipitation is completely formed, then add 5g glucose, and react at 55°C. Then carry out centrifugal drying to obtain graphene sheets loaded with metallic silver powder. figure 1 The scanning electron micrograph of the graphene sheet that is loaded with metallic silver powder for the preparation of embodiment 1; figure 2 The transmission electron micrograph of the graphene sheet that is loaded with metallic silver powder for the preparation of embodiment 1, by figure 1 and figure 2 It can be seen that the present invention has prepared graphene sheets loaded with metallic silver powder.

[0062] Weigh 9.50g of isopropanol, 20.00g of diethylene glycol, 10.00g of terpineol, 10.5g of glycerol, and 1.00g of triethanolamine, mix them thoroughly, put them into an ult...

Embodiment 2

[0068] Weigh 0.001mol / L of AgNO 3 Solution 1000mL, add 20g graphene powder, stir evenly, add 1g polyvinylpyrrolidone, add 10ml concentration of 0.1mol / L ammonia water to carry out silver mirror reaction until the precipitation is completely formed, then add 5g glucose, and react at 55°C. Then carry out centrifugal drying to obtain graphene sheets loaded with metallic silver powder.

[0069] Weigh 5.00g of isopropanol, 10.00g of diethylene glycol, 15.00g of terpineol, 20.00g of diethylene glycol dibenzoate, and 0.5g of dimethylformamide, mix them thoroughly, and put them into an ultrasonic cleaner , carry out ultrasonic dispersion, the dispersion time is 15min, and obtain the first mixed liquid.

[0070] Weigh 20.00 g of the first mixed solution, add 10.00 g of rosin modified resin and 3.00 g of hydroxyethyl cellulose therein. After stirring evenly, place it in a water bath at 80° C. for heating and dissolving to obtain a second mixed solution.

[0071] After the binder is c...

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Abstract

The invention discloses graphene based conductive ink, comprising 2-25 wt% of conductive component, 5-25 wt% of bonding agent, 0.1-5 wt% of additive, 0.1-2 wt% of pH (Potential of Hydrogen) adjusting agent and the balance of solvent. A preparation method comprises the following steps of: dispersing the pH adjusting agent into the solvent to obtain a uniform first mixed liquid; mixing the first mixed liquid with the bonding agent to obtain a second mixed liquid; and mixing the second mixed liquid with the conductive component and the additive to obtain the graphene based conductive ink. The invention further provides a flexible conductive thin film prepared from the conductive ink. The conductive ink disclosed by the invention has the advantages of good dispersity, good conductive effect, easiness for printing, and cheap price. Furthermore, the flexible conductive thin film prepared from the conductive ink disclosed by the invention has good conductive performance.

Description

technical field [0001] The invention relates to the field of conductive ink, in particular to a graphene-based conductive ink, a preparation method thereof and a flexible conductive film. Background technique [0002] Conductive ink is an ink made of conductive materials, which has a certain degree of conductive properties and is widely used for printing conductive points or conductive circuits. Conductive inks include gold-based conductive inks, silver-based conductive inks, copper-based conductive inks, and carbon-based conductive inks. Gold-based conductive inks and silver-based conductive inks have stable chemical properties and good electrical conductivity, but are expensive and non-renewable. Copper-based conductive inks are cheap, but have the disadvantage of being easily oxidized. Carbon-based conductive ink is cheap, not easy to oxidize, and environmentally friendly. [0003] At present, the conductive fillers used in carbon-based conductive inks mainly include gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/10H01B5/14C09D11/52
Inventor 周旭峰刘兆平冯冬梅王玉琼
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD
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