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Modified spherical carbon particle material, preparation method thereof, graphene-based water-based conductive ink containing modified spherical carbon particle material and preparation method of graphene-based water-based conductive ink

A conductive ink, ethylenic water-based technology, applied in the direction of ink, conductive coating, fibrous filler, etc., can solve the problem of reducing the conductivity

Inactive Publication Date: 2021-09-14
NINGBO GRAPHENE INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the dispersion of graphene materials is usually improved by adding a large amount of water, or by chemically modifying the surface of graphene to improve its dispersion and fluidity, but this itself will reduce its electrical conductivity

Method used

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  • Modified spherical carbon particle material, preparation method thereof, graphene-based water-based conductive ink containing modified spherical carbon particle material and preparation method of graphene-based water-based conductive ink
  • Modified spherical carbon particle material, preparation method thereof, graphene-based water-based conductive ink containing modified spherical carbon particle material and preparation method of graphene-based water-based conductive ink
  • Modified spherical carbon particle material, preparation method thereof, graphene-based water-based conductive ink containing modified spherical carbon particle material and preparation method of graphene-based water-based conductive ink

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preparation example Construction

[0051] Such as figure 1 As shown in the left column, a typical graphene-based water-based conductive ink preparation method includes the following steps: add a large amount of water, additives, etc. to the graphene slurry and mix evenly; use a sand mill to sand the resulting mixture Adding carbon material, sanding again; adding water-based resin for mixing and stirring; and fine-tuning the slurry to obtain printing ink.

[0052] It can be seen that when the water-based system is used, the unmodified graphene slurry has high viscosity and poor fluidity, and it is basically difficult to use it directly. It is usually necessary to add a large amount of water to obtain the initial fluidity and processability of graphene during use. Therefore, the solid content of the prepared conductive ink is low, which leads to problems such as thin dry thickness of the single-printed coating, long drying time, and poor film quality in the subsequent preparation of the conductive coating, which ...

Embodiment 1

[0078] 5Kg of the purchased conductive carbon black (IMERYS, Super P Li) is placed in an airtight stirring tank, adding a solid content of 50% polyethylaniline aqueous solution 5Kg, stirring under airtight conditions until the temperature in the tank rises to 80 Celsius, stop stirring, slowly cool down to room temperature; add about 300g of pH adjuster (DOW, AMP-95) into the above system, stir and mix evenly to obtain a weakly alkaline modified conductive carbon black slurry with a pH of about 8-9 material;

[0079] Take the modified conductive carbon black prepared above as raw material, weigh 1Kg in a stirring tank, then add 28Kg of graphene slurry with a solid content of 5% (Mexi Technology, ESOE-5), add additives (defoamer , BYK-011, 14g; leveling agent, BYK-349, 21g) and then vigorously stirred until evenly mixed to obtain a carbon-based mixed slurry with good fluidity; then add a water-soluble acrylic emulsion with a solid content of 40% (Zhongen Chemical industry, BA-8...

Embodiment 2

[0082] 5Kg of graphite purchased (Shanghai Huiping, KS-6) was placed in an airtight stirring tank, and 5Kg of polyethylaniline aqueous solution with a solid content of 50% was added, and stirred under airtight conditions until the temperature in the tank rose to 85 Celsius, stop stirring, slowly cool down to room temperature; add 500g of pH adjuster (DOW, AMP-95) to the above system, stir and mix evenly to obtain a weakly alkaline modified conductive carbon black slurry with a pH of about 9-10 ;

[0083]Taking the modified conductive carbon black prepared above as raw material, weigh 1.1Kg in a stirring tank, then add 16Kg of graphene slurry with a solid content of 5% (Mexi Technology, ESOE-5), add additives (defoaming agent, BYK-011, 80g; leveling agent, BYK-349, 120g) and then vigorously stir until mixed evenly to obtain a carbon-based mixed slurry with good fluidity; then add a water-soluble styrene-acrylic emulsion with a solid content of 35% ( Ecosol, BS-104) 1.7Kg, stir...

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Abstract

The invention relates to a modified spherical carbon particle material. The modified spherical carbon particle material is prepared from a spherical carbon particle material, a water-soluble polymer containing a conjugated structure and a pH regulator. The invention also relates to a preparation method of the modified spherical carbon particle material. The invention further relates to a graphene-based water-based conductive ink containing the modified spherical carbon particle material, and a preparation method of the graphene-based water-based conductive ink. The modified spherical carbon particle material disclosed by the invention can effectively improve the dispersity and conductivity of graphene in the graphene-based water-based conductive ink, and the solid content of the ink is increased to 13% or above.

Description

technical field [0001] The invention relates to the technical fields of conductive paste and graphene, in particular to a modified spherical carbon particle material, a graphene-based water-based conductive ink containing the same and a preparation method thereof. Background technique [0002] Water-based conductive ink is a liquid or pasty ink containing conductive fillers, binders, additives and other components, which can be used to print conductive points or conductive lines. Carbon materials such as graphite and carbon black are commonly used as conductive fillers in water-based conductive inks. Although the cost is low, the conductivity is poor. Increasing the content of conductive filler can improve its conductivity, but when the content of conductive filler is too high, the appearance, performance, and stability of the conductive coating will be adversely affected. For example, the flexibility and adhesion of the coating are poor, and microcracks and peeling are eas...

Claims

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Application Information

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IPC IPC(8): C09C1/46C09C3/10C09D11/52C09D5/24
CPCC09C1/46C09C3/10C09D11/52C09D5/24
Inventor 陈令东吴祯琪刘兆平
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD
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