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Graphene electric-conduction ink preparation method, graphene electric-conduction ink film and graphene electric-conduction ink film composite material film

A technology of composite film and conductive ink, which is applied in the field of preparation of graphene conductive ink composite film, graphene conductive ink film, and graphene conductive ink, can solve the problems of hindering graphene, high toxicity, narrow application range, etc. Achieve the effects of environmental protection in the production process, wide viscosity and fineness, and wide adjustable range

Active Publication Date: 2019-11-29
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing graphene inks are mainly aimed at replacing traditional conductive inks in printed electronics such as metal-based inks and carbon black-based inks. These graphene conductive inks usually have the following problems: (1) The formula is complex, and the non-graphene conductive components High content with other additives
(2) The process is complex, such as the graphene ink preparation process disclosed in the invention patent CN104212242A, which needs repeated steps such as earth grinding, stirring, ultrasonication, centrifugation, suction filtration and distillation
(3) The solvent is highly toxic, such as the more toxic N-methylpyrrolidone used in the preparation method of the invention patent CN104556020A
(4) low yield, such as the graphene ink disclosed in the invention patent CN106118244A and its preparation method, need multiple high-speed centrifugation, washing and drying, thereby causing its yield to be very low, and although the formula is relatively simple in this method, the The graphene ink prepared by the method cannot be functionalized (as heteroatom doping, composite modification, etc.), so the performance of the ink cannot be further improved
(5) The scope of application is narrow. In particular, it should be pointed out that for energy storage and conversion devices, nanoelectronic devices, multifunctional sensors, electromagnetic shielding and other application scenarios, the non-graphene conductive materials that exist in large quantities in these existing graphene inks Components and other additives may adversely affect device performance by masking or impairing the original physical properties of graphene
For example, most adhesives, dispersants, defoamers and other additives have high resistance and are difficult to remove at a later stage
They will not only hinder the formation of conductive pathways between graphene and affect the conductivity, but also affect the purity of the graphene ink film or pattern
This will severely degrade device performance and limit the application range of graphene inks

Method used

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  • Graphene electric-conduction ink preparation method, graphene electric-conduction ink film and graphene electric-conduction ink film composite material film
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  • Graphene electric-conduction ink preparation method, graphene electric-conduction ink film and graphene electric-conduction ink film composite material film

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specific Embodiment approach

[0034] Further illustrate the present invention by the following examples, do not limit the present invention in any way, under the premise of not departing from the technical solution of the present invention, any modification or change that those of ordinary skill in the art that the present invention is done to implement easily will all be fall within the scope of the claims of the present invention.

[0035] The invention provides a kind of preparation method of graphene conductive ink, and it comprises following specific embodiment:

Embodiment 1

[0037] Weigh 0.25g of ethyl cellulose (viscosity specification: 50g / L 1:4 ethanol benzene solution, 40.0~100.0cP·s) into 30mL of absolute ethanol, stir at 500rpm for 1 hour at room temperature to obtain a uniform ethyl cellulose ethanol Solution; Weigh 0.25g redox graphene and add in ethyl cellulose ethanol solution, stir at room temperature with 500rpm for 0.5 hour to obtain graphene primary dispersion liquid, the microstructure of reduced graphene oxide is as follows figure 1 As shown, the reduced graphene oxide is sheet-like, with wrinkles and curls on the surface, indicating that the reduced graphene oxide is very thin and has fewer layers.

[0038] Place the graphene primary dispersion in an ice-water bath, and use an ultrasonic disperser to sonicate for 10 minutes under the ultrasonic mode of "running for 1 second and stopping for 2 seconds" with an ultrasonic disperser, then add 5 mL of terpineol, and continue to ultrasonicate in the same mode for 20 minutes. minutes to...

Embodiment 2

[0041] Weigh 0.03g of nitrocellulose (viscosity specification: 50g / L 1:4 ethanol benzene solution, 4-10cP·s) into 25mL of absolute ethanol, stir at 500rpm at room temperature for 0.5 hours to obtain a uniform nitrocellulose ethanol solution; Take 0.03 g of reduced graphene oxide and add it to the nitrocellulose ethanol solution, and stir at 500 rpm for 15 minutes at room temperature to obtain a primary dispersion of redox graphene.

[0042] Put the primary dispersion of graphene in an ice-water bath, use an ultrasonic disperser at 150W power, ultrasonic mode of "running for 1 second, stopping for 2 seconds" for 10 minutes, then add 2mL of the target solution, the components of the target solution and their The volume ratio is: cyclohexanone: terpineol: diethylene glycol dimethyl ether ether is 80:15:5, continue to sonicate in the same mode for 20 minutes to obtain a secondary dispersion.

[0043] Transfer the secondary dispersion to an oil bath, heat and stir at 100° C. for 1....

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Abstract

The invention discloses a graphene electric-conduction ink preparation method, a graphene electric-conduction ink film and a graphene electric-conduction ink film composite material film. According tothe present invention, a graphene electric-conduction filler is uniformly dispersed in an alcohol / ketone / ester / ether solvent under the assisting of a cellulose-based dispersing agent through room-temperature stirring and ultrasonic dispersion to obtain high-quality high-stability high-conductivity graphene ink, and further the high-quality high-stability high-conductivity graphene ink is compounded with other functional materials to obtain graphene-based composite ink; the method has characteristics of simple formula, simple process, high efficiency, environment friendliness, low cost and thelike; and the graphene ink and the composite ink are suitable for scrape coating, screen printing, direct writing, ink-jet printing and other processes, and can firmly form pure graphene or graphenecomposite films and patterns on common hard / soft substrates.

Description

technical field [0001] The invention belongs to the technical field of graphene materials; in particular, it relates to a preparation method of graphene conductive ink, a graphene conductive ink film, and a graphene conductive ink composite material film. Background technique [0002] Graphene is a carbon atom through sp 2 The hybrid orbitals form a hexagonal two-dimensional nanomaterial with a honeycomb lattice structure and only one carbon atom thickness. The unique structure of graphene endows it with many excellent properties, such as high theoretical specific surface area (2630m 2 / g), ultra-high electron mobility (~200000cm 2 / V·s), high thermal conductivity (5000W / m·K), high Young's modulus (1.0TPa) and high light transmittance (~97.7%), etc. With its structure and performance advantages, graphene has great application prospects in energy storage and conversion devices, nanoelectronic devices, multifunctional sensors, flexible and wearable electronics, electromagne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52
CPCC09D11/52
Inventor 李磊王国隆王亚玲韦性强张岩
Owner XI AN JIAOTONG UNIV
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