Graphene-containing conductive printing ink and preparation method thereof and flexible paper-based conductive circuit

A technology of conductive ink and graphene, which is applied in ink, household utensils, applications, etc., can solve problems such as insufficient performance, instability of graphene nano-silver conductive ink, impurities, etc., achieve good results, reduce complexity, and strengthen dispersion effect of effect

Active Publication Date: 2019-03-29
国宏中晶集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an improved preparation method to solve the problems of unstable, impurit

Method used

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  • Graphene-containing conductive printing ink and preparation method thereof and flexible paper-based conductive circuit
  • Graphene-containing conductive printing ink and preparation method thereof and flexible paper-based conductive circuit

Examples

Experimental program
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Embodiment 1

[0014] A kind of preparation method of conductive ink containing graphene, it is characterized in that, comprises the following steps: 1) graphene microchip preparation step: take prefabricated a large amount of expanded graphite flakes as raw material, in dehydrated alcohol through more than 1-2h Ultrasonic stripping produces graphene microsheet dispersion; after low-frequency ultrasound, the upper dispersion is taken out, and the unstripped graphite is left in the container; the solvent of the upper dispersion is added to more than 200-300ml of absolute ethanol, and high-intensity ultrasonic vibration is performed for 3- 5min, let it stand for 5-10s, immediately discard half of the dispersion liquid in the upper layer, and then add absolute ethanol to a volume above 200-300ml, repeat the above process at least 10-20 times, until the graphene microchips are confirmed by AFM or SEM. The average radial size is higher than 5-10um; all solvents are evaporated by rotary evaporation...

Embodiment 2

[0022] A kind of preparation method of conductive ink containing graphene, it is characterized in that, comprises the following steps: 1) graphene microchip preparation step: take prefabricated a large amount of expanded graphite flakes as raw material, in dehydrated alcohol through the ultrasonic wave of more than 1.5h Exfoliate to form a dispersion of graphene microflakes; after low-frequency ultrasound, take out the upper dispersion, and leave the unexfoliated graphite in the container; add the solvent of the upper dispersion to more than 220ml of ethanol, oscillate with high-intensity ultrasound for 4 minutes, and let it stand for 8 seconds , Immediately discard half of the dispersion in the upper layer, and then add absolute ethanol to a volume of more than 220ml, repeat the above process at least 15 times, until the average radial size of the graphene microplatelets is confirmed by AFM to be higher than 5um; spin evaporate all solvents , dry at room temperature to obtain ...

Embodiment 3

[0024]A method for preparing a graphene-containing conductive ink, characterized in that it comprises the following steps: 1) Graphene microsheet preparation step: using a large amount of prefabricated expanded graphite sheets as raw material, in dehydrated alcohol through ultrasonic peeling for more than 2h Generate a dispersion of graphene microflakes; after low-frequency ultrasound, take out the upper dispersion, and leave the unstripped graphite in the container; add the solvent absolute ethanol of the upper dispersion to more than 270ml, high-intensity ultrasonic vibration for 5 minutes, and let it stand for 10s. Immediately discard half of the dispersion in the upper layer, and then add absolute ethanol to a volume of more than 270ml, repeat the above process at least 20 times, until the average radial size of the graphene microflakes is confirmed by SEM to be higher than 6um; spin evaporate all solvents, Dry at room temperature to obtain graphene microflakes with a large...

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Abstract

The invention relates to a graphene-containing conductive printing ink and a preparation method thereof and a flexible paper-based conductive circuit. The method comprises the following steps: a graphene microchip preparation step, a silver-ammonia solution preparation step, a glucose solution preparation step, a double-droplet composite preparation step, an impurity cleaning step, and a conductive printing ink preparation step. The28-29 parts by weight of the printing ink contains 10 parts by weight of a graphene/nano-silver particle filler, more than 80% of the nano-silver particles in the filler have a radial size of less than 70-80 nm, and the particle agglomeration number of the nano-silver attached to micro-sheets per square micrometer is higher than 75 to 80. The actual measured resistivity of the conductive ink circuit is between 0.87-0.75 x 10<-7> ohm.meter.

Description

technical field [0001] The invention relates to the technical field of conductive ink containing graphene, in particular to a conductive ink containing graphene, a preparation method and a flexible paper-based conductive circuit. Background technique [0002] Graphene is a two-dimensional material composed of carbon atoms with a thickness of only one atom. It has excellent physical and chemical properties, such as excellent mechanical properties, high electrical conductivity, and good thermal conductivity. It is considered to be the most One of the potential nanomaterials. As a one-dimensional carbon nanomaterial, carbon nanofiber has the advantages of good mechanical properties, large specific surface area and good chemical stability. These special properties make it widely used in catalyst supports, polymer nanocomposites, energy Flexible substrate materials for conversion and storage devices, etc. Taking graphene microchip as an example, it not only has good physical pr...

Claims

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Application Information

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IPC IPC(8): C09D11/52C09D11/102C09D11/107
CPCC09D11/102C09D11/107C09D11/52
Inventor 张岩付吉国董伟赵然周卫东曾蕾
Owner 国宏中晶集团有限公司
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