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Graphene conductive ink and preparation method thereof

A technology of conductive ink and graphene, which is applied in ink, household utensils, applications, etc., can solve the problems of non-conductivity, easy sedimentation, poor conductivity, etc., and achieve flexibility, resistance to bending, strong adhesion, and excellent physical properties. The effect of chemical properties

Active Publication Date: 2015-04-08
SUZHOU NIUJIAN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Another problem with the conductive inks that have been developed is the use of denser silver (density 10.53g / cm 3 ), copper (density 8.92g / cm 3 ) and other metal fillers, which are dispersed in solvents and resins and are easy to settle. The conductive ink must be stirred evenly before use, otherwise it will cause problems such as poor conductivity or even non-conduction.

Method used

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  • Graphene conductive ink and preparation method thereof
  • Graphene conductive ink and preparation method thereof
  • Graphene conductive ink and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] According to the following table, put the resin and solvent in the dispersion tank, keep the temperature below 40°C, and stir at 500rpm to completely dissolve the resin to obtain a resin solution.

[0043] Add graphene and additives to the resin solution, mix evenly, transfer to a sand mill, grind for 6 hours, and use a scraper fineness meter to test the fineness of the conductive ink until the fineness of the ink is less than 10 μm, that is, the graphene conductive ink is prepared.

[0044]

[0045] The graphene conductive ink prepared in Example 1 uses a small number of layers of graphene as a filler. Due to the two-layered structure of graphene, the threshold for forming a conductive path is low, and the resistivity is 0.36Ω·cm in the case of 23% filling. Chlorinated polypropylene resin with thermoplastic resin has strong adhesion to polypropylene and polyethylene, and has good adhesion to paper, PET and other materials; use isophorone and xylene as solvents to adj...

Embodiment 2

[0048] Disperse each component according to the preparation method described in Example 1 to obtain graphene conductive ink. The conductivity of the graphene conductive ink prepared in Example 2 reaches 0.021Ω·cm.

[0049] The conductive ink prepared in Example 2 reduces the cost due to the use of multi-layer graphene, and at the same time adds a polyurethane derivative wetting agent to improve the compatibility between the graphene and the resin.

Embodiment 3

[0051]

[0052] Disperse each component according to the preparation method described in Example 1 to obtain graphene conductive ink.

[0053] The sheet resistance of the graphene conductive ink prepared in Example 3 is 29Ω·cm.

[0054] The graphene conductive ink prepared in embodiment 3 adopts shellac. 2-Amino-2-methyl-1-propanol adjusted the compatibility between graphene and solvent, and adjusted the relative content of graphene and solvent at the same time. The prepared ink is characterized by low solid content and low viscosity, suitable for For some special applications such as spraying, printing, spin coating, etc., it can be used to prepare some nanometer ultra-thin conductive films, thin film resistors, etc.

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Abstract

The invention relates to graphene conductive ink comprising the following components by weight percent: 0.01-25% of resin, 0.1-95% of graphene, 0.1-30.0% of assistant, and 5.0-99.79% of solvent. The two-dimensional conductive material graphene is used for the conductive ink; the graphene with special ratio is adopted as a conductive phase; the resin is taken as a binder; the assistant and the solvent are used for assisting; the prepared ink is good in anti-sedimentation property, and adjustable in viscosity and rheological behavior, and can be used for flexibly printing on the surfaces of a plurality of substrates; and the ink is stable in mechanical property, stable in electrical properties, oxidation resistance, acid resistance, alkali resistance and resistance to a chemical solvent after being cured.

Description

technical field [0001] The invention relates to a conductive ink, in particular to a graphene conductive ink and a preparation method thereof. Background technique [0002] Graphene is a sp 2 The hexagonal lattice honeycomb-like two-dimensional structure planar film and two-dimensional material composed of carbon atoms is another major discovery after carbon nanotubes and fullerenes. Graphene presents novel physical properties. Single-layer graphene has good transparency and only absorbs 2.3% of light; its electron mobility exceeds 15,000 cm at room temperature. 2 / V·s. Graphene has excellent electrical conductivity and physical and mechanical properties, and the lateral (in-plane) conductivity is as high as 10 6 S / m, the ultimate strength can reach 130GPa, the tensile modulus is 1.01TPa, and the thermal conductivity is good, the thermal conductivity is 5000W / (m K), and the density is only 1.3-2g / cm 3 . Because graphene has excellent chemical and thermal properties, lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/52
Inventor 吴卫平施红华
Owner SUZHOU NIUJIAN NEW MATERIAL
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