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Graphene-based printing ink and preparation method thereof

A printing ink and graphene-based technology, applied in the field of graphene-based printing ink and its preparation, can solve the problems of poor dispersion effect, easy agglomeration of nano-silver, easy to fall off, etc., to achieve enhanced adhesion and tear resistance, Effect of improving electrical conductivity and improving dispersibility

Inactive Publication Date: 2019-12-06
孙倩柔
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a graphene-based printing ink in order to overcome the poor dispersion effect of graphite in ink components in the prior art, which is easy to agglomerate and the nano-silver deposited on the surface of graphene by a reduction method is easy to fall off.

Method used

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  • Graphene-based printing ink and preparation method thereof

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Effect test

Embodiment 1

[0031] The preparation method of modified graphite flakes comprises the following steps:

[0032] 1) Take flake graphite according to the ratio of 1g / 80mL and add it to concentrated sulfuric acid with a mass concentration of 70% in a water bath and heat it to 65°C for soaking for 40min; Potassium acid potassium was added to concentrated sulfuric acid, and oxidized under airtight conditions for 8 hours. After cooling, an aqueous solution of hydrogen peroxide with a mass concentration of 20% was added. The mass ratio of hydrogen peroxide to graphite flakes was 1:20. Stir for 50 minutes and use after suction filtration. Aqueous hydrochloric acid solution with a mass concentration of 10% is pickled, washed with water, and dried at 50°C to obtain graphene oxide;

[0033] 2) Allyl glycidyl ether is dissolved in deionized water to prepare an allyl glycidyl ether solution with a mass concentration of 15%; graphene oxide is added to the allyl glycidyl ether solution, wherein graphene o...

Embodiment 2

[0042] The preparation method of modified graphite flakes comprises the following steps:

[0043] 1) Take flake graphite according to the ratio of 1g / 80mL and add it to concentrated sulfuric acid with a mass concentration of 70% in a water bath and heat it to 60°C for soaking for 50min; Potassium acid potassium was added to concentrated sulfuric acid, and oxidized under airtight conditions for 6 hours. After cooling, an aqueous solution of hydrogen peroxide with a mass concentration of 20% was added. The mass ratio of hydrogen peroxide to graphite flakes was 1:20. Stir for 30 minutes and use after suction filtration. Aqueous hydrochloric acid solution with a mass concentration of 10% is pickled, washed with water, and dried at 50°C to obtain graphene oxide;

[0044] 2) Allyl glycidyl ether is dissolved in deionized water to prepare an allyl glycidyl ether solution with a mass concentration of 15%; graphene oxide is added to the allyl glycidyl ether solution, wherein graphene o...

Embodiment 3

[0053] The preparation method of modified graphite flakes comprises the following steps:

[0054] 1) According to the ratio of 1g / 80mL, take flake graphite and add it to 70% concentrated sulfuric acid with a mass concentration of 70% in a water bath and heat it to 62°C for soaking for 45min; Potassium acid potassium was added to concentrated sulfuric acid, oxidized under airtight conditions for 10 hours, after cooling, an aqueous solution of hydrogen peroxide with a mass concentration of 20% was added, the mass ratio of hydrogen peroxide to flake graphite was 1:20, stirred for 40 minutes, and used after suction filtration Aqueous hydrochloric acid solution with a mass concentration of 10% is pickled, washed with water, and dried at 50°C to obtain graphene oxide;

[0055] 2) Allyl glycidyl ether is dissolved in deionized water to prepare an allyl glycidyl ether solution with a mass concentration of 15%; graphene oxide is added to the allyl glycidyl ether solution, wherein graph...

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Abstract

The invention relates to the technical field of printing ink and discloses graphene-based printing ink and a preparation method thereof. The graphene-based printing ink comprises the following components in parts by weight: 30-40 parts of waterborne polyurethane resin, 20-30 parts of modified graphite flakes, 5-10 parts of conductive carbon black, 2-5 parts of a dispersing agent, 1-3 parts of a flatting agent, 1-3 parts of a defoaming agent, 1-3 parts of a silane coupling agent, and 50-60 parts of water. The preparation method comprises the following steps of a) adding the waterborne polyurethane resin, the modified graphite flakes, the dispersing agent and the water into a stirrer for stirring to obtain a premix; and b) adding the conductive carbon black, the silane coupling agent, the flatting agent and the defoaming agent into the premix, and carrying out stirring to obtain the graphene-based printing ink. Graphene of the printing ink has excellent dispersing performance and does not easily generate secondary agglomeration; and silver ions deposited on the surface of the graphene are not prone to fall off from the surface of the graphene by a reduction method, so that the conductivity and conductive stability of the printing ink are improved.

Description

technical field [0001] The invention relates to the technical field of inks, in particular to a graphene-based printing ink and a preparation method thereof. Background technique [0002] Conductive ink is an ink with the function of transmitting current, and it is a special ink that can conduct electricity in the manufacture of electronic devices. According to different printing methods, conductive fillers, binders, additives and solvents are usually prepared in different proportions to make inks that can meet printing needs. After the substrate material is printed and sintered and solidified, it can be used as a conductive circuit to form an electron flow channel, and has the conductive function of transmitting current. The conductive filler directly determines the conductivity of the ink, and the type, shape and content of the conductive filler have a major impact on its conductivity. The binder is the film-forming substance in the ink. It connects the conductive partic...

Claims

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Application Information

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IPC IPC(8): C09D11/52C09D11/102C09D11/03C09D11/033
CPCC09D11/03C09D11/033C09D11/102C09D11/52
Inventor 孙倩柔
Owner 孙倩柔
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