Preparation technology for graphene conductive printing ink

A technology of conductive ink and preparation process, which is applied in ink, household utensils, applications, etc. It can solve the problems that the conductive properties of carbon black, graphite and carbon fiber cannot meet the development needs, and achieve a large market application prospect, low curing temperature, and volume resistance. low rate effect

Inactive Publication Date: 2019-03-12
SICHUAN ANDGEM GRAPHENE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conductive properties of carbon black, graphite and carbon fiber ca

Method used

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  • Preparation technology for graphene conductive printing ink

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[0024] Example 1:

[0025] A kind of preparation technology of graphene conductive ink, comprises the following steps:

[0026] (1) Use the mixed acid solution of concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 3:1 to pretreat flake graphite. The pretreatment time is 35 minutes, and the pretreatment temperature is 60°C. Then add potassium perchlorate powder, flake graphite and high The mass ratio of potassium chlorate powder is 120:1. After being sealed and oxidized for 7 hours, add hydrogen peroxide solution dropwise at room temperature, stir for 1-3 hours, then filter with suction, rinse with dilute hydrochloric acid with a mass concentration of 10%, and then use deionized After washing with water until neutral, put it in an oven and dry it at 75°C, add the obtained graphene oxide into deionized water, ultrasonically vibrate and peel off, after peeling, evaporate at low temperature, and evenly disperse the brown graphene oxide solution;

[002...

Example Embodiment

[0031] Example 2:

[0032] A kind of preparation technology of graphene conductive ink, comprises the following steps:

[0033](1) Use a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid at a volume ratio of 5:1 to pretreat the flake graphite. The pretreatment time is 45 minutes, and the pretreatment temperature is 55°C. Then add potassium perchlorate powder, flake graphite and high The mass ratio of potassium chlorate powder is 130:1. After being sealed and oxidized for 5 hours, add hydrogen peroxide solution dropwise at room temperature, stir for 1-3 hours, then filter with suction, rinse with dilute hydrochloric acid with a mass concentration of 11%, and then use deionized After washing with water to neutrality, put it in an oven and dry it at 78°C, add the obtained graphene oxide into deionized water, ultrasonically vibrate and peel off, after peeling, evaporate at low temperature, and evenly disperse the brown graphene oxide solution;...

Example Embodiment

[0038] Example 3:

[0039] A kind of preparation technology of graphene conductive ink, comprises the following steps:

[0040] (1) Use a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 1:1 to pretreat flake graphite. The pretreatment time is 30 minutes, and the pretreatment temperature is 50 ° C. Then add potassium perchlorate powder, flake graphite and high The mass ratio of potassium chlorate powder is 100:1. After being sealed and oxidized for 5 hours, add hydrogen peroxide solution dropwise at room temperature, stir for 1-3 hours, then filter with suction, rinse with dilute hydrochloric acid with a mass concentration of 8%, and then use deionized After washing with water to neutrality, put it in an oven and dry it at 70°C, add the obtained graphene oxide into deionized water, ultrasonically vibrate and peel it off, after peeling off, evaporate at low temperature, and evenly disperse the brown graphene oxide solu...

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Abstract

The invention provides a preparation technology for graphene conductive printing ink and relates to the technical field of conductive materials. The preparation technology comprises the following steps of performing pretreatment on flake graphite, performing sealing oxidization on potassium perchlorate, adding the obtained graphene oxide in deionized water, performing ultrasonic vibration stripping, and performing low-temperature evaporation after stripping to obtain a uniformly dispersed brown graphene oxide solution; slowly dropwise adding ammonium hydroxide in an ethanol solution of silvernitrate, regulating a pH value of a system to be 9 to obtain a silver ammonia solution, and preparing a graphene-loaded nanometer silver conductive material by utilizing the silver ammonia solution; and mixing and adding raw materials in a high-speed shearing dispersion machine, adding an adhesive and an additive after high-speed shearing dispersion, performing continuous high-speed shearing dispersion, removing large-particle impurities with a filter membrane with a certain aperture, and performing split charging. The graphene conductive printing ink provided by the invention has good printability; and an ink layer after printing has various excellent properties of low electrical resistivity, low curing temperature, stable conductivity, good conductivity and the like and has a very largemarket application prospect.

Description

technical field [0001] The invention relates to the field of conductive materials, in particular to a preparation process of graphene conductive ink. Background technique [0002] With the development of science and technology, the application range of printed electronics is becoming wider and wider. Conductive ink is an ink with conductive properties after printing and sintering, and is a key material for printing electronics. It solves the problems of complex process steps, high cost, and serious environmental pollution in traditional electronic circuit technology. Conductive inks are generally divided into two types according to the structure: structural type and filling type. At present, the conductive ink that has been researched more and has a wider range of applications is a composite filled conductive ink. The preparation principle of composite filled conductive ink is to add conductive filler to the polymer, and then mix it with an appropriate amount of additives...

Claims

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Application Information

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IPC IPC(8): C09D11/52
CPCC09D11/52
Inventor 陆文杰陈明
Owner SICHUAN ANDGEM GRAPHENE TECH CO LTD
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