Unlock instant, AI-driven research and patent intelligence for your innovation.

Graphene aqueous composition, preparation method thereof, and graphene aqueous conductive printing ink

A conductive ink, vinyl water technology, applied in the direction of ink, household appliances, applications, etc., can solve problems such as increasing the resistivity of the coating

Inactive Publication Date: 2019-04-19
NINGBO GRAPHENE INNOVATION CENT CO LTD
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, water and organic solvents are usually mixed to improve the dispersion of graphene materials, but a large amount of organic solvent vapors will be emitted during production; or a large amount of graft modification is carried out on the surface of graphene to improve its dispersibility and fluidity, but this in itself increases the resistivity of the resulting coating

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Graphene aqueous composition, preparation method thereof, and graphene aqueous conductive printing ink
  • Graphene aqueous composition, preparation method thereof, and graphene aqueous conductive printing ink
  • Graphene aqueous composition, preparation method thereof, and graphene aqueous conductive printing ink

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0046] The preparation method of above-mentioned graphene aqueous composition, comprises the steps:

[0047] (1), use water, dispersant A and graphene to prepare graphene aqueous dispersion liquid. Among them, the dispersant A is the above-mentioned dispersant A, and after mixing water, dispersant A and graphene, the graphene aqueous dispersion is obtained by high-speed shearing. Optionally, the shear rate of high-speed shearing is: 5000rpm-24000rpm, high-speed Shear dispersion can be dispersed by using a combination of one or more of dispersion discs, jet mills, ultrasonic processors, ball mills, and sand mills to obtain graphene aqueous dispersions.

[0048] Optionally, graphene may be graphene obtained by liquid phase exfoliation. The liquid phase exfoliation method is to disperse graphite in a solvent first, and then assisted exfoliation by means of ultrasound, microwave, shear force, thermal stress, and electrochemical methods, and then centrifuged to obtain graphene. T...

Embodiment 1

[0059] The following are the parameters of each component of the graphene water-based composition that the examples provide such as Table 1,

[0060] The parameters of each component of the graphene aqueous composition of table 1

[0061]

[0062]

[0063] Under the condition that other conditions remain unchanged, use the parameters in the above Table 1 to prepare the graphene aqueous dispersion, and use the NDJ-5 rotational viscometer at (25±1)°C to conduct the viscosity test to obtain Table 2,

[0064] The viscosity of table 2 graphene aqueous composition

[0065]

[0066] As can be seen from Table 2, comparative example 5 (only adds dispersant A), comparative example 4 (only adds dispersant B), comparative example 3 (only adds graphene, does not add carbon material), comparative example 2 (graphite The fineness of graphene aqueous composition is bigger), comparative example 1 (in the particle size distribution of graphene aqueous composition, D100 is larger), the...

Embodiment 2

[0068] Form graphene water-based conductive ink after adding epoxy resin binder in the graphene water-based composition that embodiment one provides, and use above-mentioned method to prepare conductive coating, measure the volume resistivity of conductive coating, its measuring method is: The surface resistivity of the coating was measured by the four-probe method, and the coating thickness was measured by a spiral micrometer. The volume resistivity was equal to the surface resistivity multiplied by the thickness. get table 3,

[0069] Table 3 Volume resistivity of conductive coating

[0070]

[0071]As can be seen from Table 3, comparative example 5 (only adds dispersant A), comparative example 4 (only adds dispersant B), comparative example 3 (only adds graphene, does not add carbon material), comparative example 2 (graphite The fineness of graphene water-based composition is bigger) and comparative example 1 (D100 is larger in the particle size distribution of graphene...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a graphene aqueous composition, a preparation method thereof, and a graphene aqueous conductive printing ink, and belongs to the technical field of graphene materials. The graphene aqueous composition comprises water, a dispersant A, a dispersant B, graphene, and a carbon material, the particle size (D100) of the graphene aqueous composition is 30 to 300 [mu]m, and the fineness of the graphene aqueous composition is not more than 15 [mu]m. The graphene aqueous composition comprises water, a dispersant A, a dispersant B, graphene, and a carbon material, and the graphene and the carbon material form a loose embedded structure. The graphene aqueous conductive printing ink comprises the graphene aqueous composition, and one of aqueous resin emulsion, an aqueous printingink aid, and a cosolvent. The graphene aqueous composition is obtained by the preparation method mentioned above, the dispersion effect of the graphene aqueous composition is better, and after the graphene aqueous composition is made into the graphene aqueous conductive printing ink, the resistivity of obtained conductive coating is lower.

Description

technical field [0001] The invention relates to the technical field of graphene materials, in particular to a graphene water-based composition, a preparation method thereof and a graphene water-based conductive ink. Background technique [0002] Graphene is a new type of carbon material formed by the repeated arrangement of carbon atoms in a honeycomb hexagon. It has a perfect two-dimensional structure and has good electrical, mechanical, thermal and optical properties. However, graphene itself is a nanomaterial with a very high specific surface area and a complete two-dimensional sheet structure, so it will have a very high viscosity when added in a very small amount. Generally, the fluidity will be basically lost when the addition amount is 5%. [0003] In the prior art, water and organic solvents are usually mixed to improve the dispersion of graphene materials, but a large amount of organic solvent vapors will be emitted during production; or a large amount of graft mo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52C09D11/10C09D11/03
CPCC09D11/03C09D11/10C09D11/52
Inventor 吴祯琪刘兆平
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD