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Conductive graphene printing ink and preparation method thereof

A technology of conductive ink and graphene, which is applied in the direction of ink, household utensils, applications, etc.

Active Publication Date: 2013-09-25
ZHUHAI LETONG NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional conductive inks are composed of gold, silver, copper powder or other metal powders or carbon powders and binders, which have disadvantages such as high cost, complicated process, high resistivity, and high molding and curing temperature. With the development of electronic products and equipment Developing in the direction of light, thin, small, low cost, multi-functional, high reliability, etc., the amount of flexible circuits is increasing, using conductive ink or conductive ink to form conductive lines on flexible insulating substrates by printing or printing attracted widespread attention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1 (comparative example)

[0038] Take 60 g of bisphenol A epoxy resin (Hongchang Electronic Materials Company, GESR901) into the experimental bottle, add 25 g of methyl ethyl ketone, stir for 40 min until completely dissolved, then add dicyandiamide (Gansu Darong Chemical, L-curing agent)-dimethylformamide (BASF, A-801) solution 11.0 g (dicyandiamide: dimethylformamide = 1:9 ratio, fully dissolve dicyandiamide in dimethylformamide) 1.5 g of defoamer (Dow Corning, DC-56) solution, 0.2 g of accelerator (Gansu Darong Chemical, methylimidazole) and 10 g of ethyl acetate (Dow Chemical, HCH) were added dropwise while stirring. Disperse in the mixer for 1.5 hours to obtain the connecting material;

[0039] The prepared connecting material is printed on the PI film by screen printing, the film thickness is about 10 microns, cured under certain conditions, and the resistivity is 1.2 × 10 with a four-probe instrument. -6 Ω·cm. the

Embodiment 2

[0041] Take 60 g of bisphenol A epoxy resin (Hongchang Electronic Materials Company, GESR901) into the experimental bottle, add 25 g of methyl ethyl ketone, stir for 40 min until completely dissolved, then add dicyandiamide (Gansu Darong Chemical, L-curing agent)-dimethylformamide (BASF, A-801) solution 11.0 g (dicyandiamide: dimethylformamide = 1:9 ratio, fully dissolve dicyandiamide in dimethylformamide) 1.5 g of defoamer (Dow Corning, DC-56) solution, 0.2 g of accelerator (Gansu Darong Chemical, methylimidazole) and 10 g of ethyl acetate (Dow Chemical, HCH) were added dropwise while stirring. Disperse in the mixer for 1.5 hours to obtain the connecting material;

[0042] Weigh 110 g of graphene (Ningbo Moxi Technology Co., Ltd.) and mix it with 150 g of butanone, and add 1.1 g of coupling agent (Dow Corning, Z-6040) into an ultrasonic instrument at 35°C at 2500 r / min Ultrasonic dispersion for 5 hours to obtain a graphene suspension, standing for 12 hours to separate the gr...

Embodiment 3

[0046] Take 60 g of bisphenol A epoxy resin (Hongchang Electronic Materials Company, GESR901) into the experimental bottle, add 25 g of methyl ethyl ketone, stir for 40 min until completely dissolved, then add dicyandiamide (Gansu Darong Chemical, L-curing agent)-dimethylformamide (BASF, A-801) solution 11.0 g (dicyandiamide: dimethylformamide = 1:9 ratio, fully dissolve dicyandiamide in dimethylformamide) 1.5 g of defoamer (Dow Corning, DC-56) solution, 0.2 g of accelerator (Gansu Darong Chemical, methylimidazole) and 10 g of ethyl acetate (Dow Chemical, HCH) were added dropwise while stirring. Disperse in the mixer for 1.5 hours to obtain the connecting material;

[0047] Weigh 300 g of graphene (Ningbo Moxi Technology Co., Ltd.) and mix it with 400 g of methyl ethyl ketone, and add 3.0 g (Dow Corning, Z-6040) into an ultrasonic instrument at 35°C at 2500 r / min for ultrasonic dispersion8 Hour obtains graphene suspension, leaves standstill 12 hours and separates graphene sol...

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Abstract

The invention provides a conductive graphene printing ink. The conductive graphene printing ink is composed of 0.001-80wt% of graphene, 1-60wt% of a linking material, 0.1-30wt% of an assistant, and the balance solvent. The invention also provides a preparation method of the conductive graphene printing ink. The conductive graphene printing ink has the advantages of good toughness, good die molding performance, good adhesion and good impact resistance; chemically doped graphene and chemically modified graphene in the graphene have good conductive, mechanical and thermal performances. The molecules of the chemically doped graphene comprise one or more of polyaniline, polyacetylene, polythiophene, polyparaphenylene and polypyrrole, and the functional groups of the chemically modified graphene comprise one or more of an anilino group, a pyrryl group, an imidazolyl group, a benzenesulfonic acid group, a thienyl group, a furyl group, a phenyl group, a hydroxy group, an ester group and derivative groups thereof, so the conductive performance, the mechanical performances and the dispersion stability of graphene in the printing ink are improved.

Description

technical field [0001] The invention relates to the technical field of electronic material printing, in particular to a graphene conductive ink and a preparation method thereof. Background technique [0002] Graphene is a new material with a single-layer sheet structure of carbon atoms. Since the successful isolation of graphene by physicists Andre Heim and Konstantin Novoselov of the University of Manchester in 2004, the physical and chemical properties of graphene and its application have become a research hotspot. . It is reported that the thickness of graphene is only 0.34 nanometers, and the conduction rate of electrons in graphene is 8×10 5 m / s; electrical conductivity 1250~7000s / m; thermal properties of graphene are stable and thermal conductivity is 3080~5150W / mK. Graphene has superhard mechanical strength, reaching 110-130 GPa, and has a large specific surface area (2630m / g). The special structure of graphene makes it have excellent performance, low cost, effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/10
Inventor 张彬贤胡军何益良何喜森郑伟忠蒯舒洪
Owner ZHUHAI LETONG NEW MATERIAL TECH CO LTD
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