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Graphene coating as well as preparation method and coating method thereof

A technology of graphene and few-layer graphene, applied in anti-corrosion coatings, conductive coatings, coatings, etc., can solve the problems of thick and brittle coatings, dark colors, poor oil seepage resistance, etc.

Inactive Publication Date: 2014-12-10
SUPERCDONGGUAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the traditional conductive coating, the conductive process is realized by providing free electrons through the doped conductive particles, such as graphite, carbon black, metal, etc.; ordinary conductive carbon black, the conductivity is not good enough, the coating is thick and brittle, and the coating adhesion Poor, poor oil resistance, darker color; coatings made of metal particles or metal-coated polymer particles are too expensive, easy to oxidize, easy to layer, and inconvenient for construction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A few-layer graphene coating, comprising few-layer graphene 30wt%, adhesive (PVDF) 20wt%, dispersant (PVC) and surfactant (sodium alkylbenzene sulfonate) 0.01~50wt%, defoamer (Simethicone oil, phenylethyl alcohol oleate, GP type defoamer) 2wt%, solvent (water) balance.

[0030] Preparation method: uniformly disperse the few-layer graphene, dispersant, binder, defoamer and solvent at high speed and high energy to obtain the few-layer graphene coating

[0031] Take 20 parts of the few-layer graphene coating and 80 parts of PMMA, add an appropriate amount of the same solvent>5m / s and stir and disperse for 1 hour. Adjust the solid content to 1-10%. The adjusted slurry is coated on the PET film, and the bulk resistivity of the film is measured to be 10 -2 ohm.cm, the grade of adhesion on PET is grade 1, and the grade of adhesion on aluminum foil is grade 0.

Embodiment 2

[0033] A few-layer graphene coating comprises few-layer graphene 50wt%, adhesive agent (epoxy resin) 18wt%, dispersant (PVP) and surfactant (sodium polyacrylate) 0.5wt%, defoamer (benzene ethanol oleate) 0.5wt%, isopropanol balance.

[0034] Preparation method: uniformly disperse the few-layer graphene, dispersant, binder, defoamer and solvent at high speed and high energy to obtain the few-layer graphene coating

[0035] Get 80 parts of described few-layer graphene coatings, PMMA20 parts, all the other steps are with embodiment 1. The measured bulk resistivity of the thin film is 10 -4 ohm.cm, the adhesion level of PET is 2-1, and the adhesion level of aluminum foil is 1-0.

Embodiment 3

[0037] A few-layer graphene coating comprises few-layer graphene 20wt%, adhesive agent (PEO, PAN) 40wt%, dispersant (PU, CMC) and surfactant (sodium alginate) 5wt%, defoamer ( GP type defoamer) 5wt%, solvent (butanone) balance.

[0038] Preparation method: uniformly disperse the few-layer graphene, dispersant, binder, defoamer and solvent at high speed and high energy to obtain the few-layer graphene coating

[0039] Get 30 parts of described few-layer graphene coatings, PVDF70 parts, all the other steps are with embodiment 1. The measured bulk resistivity of the thin film is 10 -3 ohm.cm, the grade of adhesion on PET is grade 1, and the grade of adhesion on aluminum foil is grade 0.

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Abstract

The invention belongs to the technical field of materials and in particular relates to a graphene coating as well as a preparation method and a coating method thereof. The graphene coating is prepared from the components by weight: 5-95wt percent of less layer of grapheme, 5-95wt percent of adhesive, 0.01-50wt percent of dispersant and surfactant, 0.01-10wt percent of defoamer and the balance of solvent. With the adoption of the graphene coating, the thickness of an electricity and heat conductive coating can be controlled to be 100nm-20 microns; when the graphene coating is used on a plastic matrix, the volume resistivity can reach a range from 10<-2>ohm.cm to 10<-4>ohm.cm; while the graphene coating is used on a metal matrix, the volume resistivity can reach 10<-6>ohm.cm. The graphene coating can be applied to the metal surface so as to improve the cohesiveness, the electricity / heat conduction performance and the corrosion and oxidation resistance. When the graphene coating is coated on the plastic surface, the frictional resistance, the electricity and heat conduction performances and the static resistance can be lowered, and the graphene coating can be applied to the fields of printed circuits, electronic devices, radio frequency devices, touch screens, thin film solar energy, LEDs, magnetic shielding, radio frequency shielding and the like.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a few-layer graphene coating, a preparation method and an application method thereof. Background technique [0002] The contact surface of the same or dissimilar metals usually has a large contact resistance due to the formation of an oxide film on the surface. Plastics tend to accumulate charges due to their insulating properties. [0003] By coating a conductive coating with good stability on the metal surface, the contact resistance can be reduced; a conductive film is usually coated on the plastic surface, including conductive silver glue to dissipate heat and prevent static electricity accumulation. [0004] In the traditional conductive coating, the conductive process is realized by providing free electrons through the doped conductive particles, such as graphite, carbon black, metal, etc.; ordinary conductive carbon black, the conductivity is not good enough...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/24C09D5/08C09D7/12B05D7/24B05D3/02
Inventor 李召平李琦苏俊文蔡庆荣
Owner SUPERCDONGGUAN TECH
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