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

Flaky metal powder material coated with graphene and preparation method thereof

A graphene-coated, flake-shaped metal technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problem that it is difficult to play the role of shielding and cathodic protection, and the dispersion interface hinders the development of graphene-modified zinc-rich coatings, graphene Unable to play the role of conductive connection, etc., to achieve the effects of high-efficiency shielding effect, improved stability, and improved corrosion resistance of the coating

Inactive Publication Date: 2018-09-11
NORTH CHINA UNIVERSITY OF TECHNOLOGY
View PDF10 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when flake zinc powder is used instead of spherical zinc powder and graphene to form a zinc-rich coating, due to the oil isolation effect on the surface of the flake zinc powder, graphene cannot play an effective role in conducting electricity, and the prepared coating is still It is mainly based on the shielding effect, and it is difficult to achieve the double protection effect of shielding and cathodic protection
In addition, the dispersion and interface problems of graphene in coatings are also technical problems hindering the development of graphene-modified zinc-rich coatings.

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] An embodiment of the present invention provides a method for preparing a graphene-coated flake metal powder material, which is used to prepare the above-mentioned graphene-coated flake metal powder material, including:

[0017] Add any one of graphite oxide material or graphene oxide material to the grinding equipment (preferably using a ball mill) in proportion to the spherical metal powder, solvent and grinding medium, and grind for 3-18 hours at a speed of 20-200 rpm. The slurry is obtained within 1 hour, and then the slurry is taken out, dried and graded to obtain a sheet metal powder material coated with graphene oxide whose surface protection layer is graphene oxide or composite auxiliary agent.

[0018] In the above preparation method, any one of the graphite oxide material or graphene oxide material is: any one of graphite oxide, graphite oxide, graphene oxide, and graphene oxide of a composite auxiliary agent;

[0019] The ratio of any one of graphite oxide or ...

Embodiment 1

[0036] The present embodiment provides a kind of preparation method of graphene-coated flaky zinc powder, specifically comprising:

[0037]10kg of spherical zinc powder, 0.08kg of graphite oxide, 0.4kg of stearic acid, 30L of ethanol and 150kg of grinding balls were added to the ball mill, and ground for 10 hours at a ball milling speed of 70 rpm, and then the slurry obtained by grinding was taken out and separated. The separated flaky metal paste is dried and classified to obtain a flaky zinc powder material coated with graphene oxide.

Embodiment 2

[0039] The present embodiment provides a kind of preparation method of graphene-coated flaky zinc powder slurry, and this method specifically comprises:

[0040] Put 10kg of atomized aluminum powder, 0.15kg of graphite oxide, 30L of solvent oil and 150kg of zirconia balls into the ball mill, grind for 10 hours at a ball milling speed of 70 rpm, then take out the slurry and separate it to the separated Add 0.5 kg of vitamin C to the aluminum slurry, and knead fully for 3 hours to obtain a scaly aluminum powder slurry material coated with graphene oxide.

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 discloses a flaky metal powder material coated with graphene and a preparation method thereof, and belongs to the technical field of metal powder material preparation and surface modification treatment. The preparation method comprises the steps that firstly, spherical metal powder, graphite oxide or graphene oxide materials, addition agents, solvents and grinding media are added into a ball mill according to a certain ratio, and ball milling is conducted at the ball milling speed of 20-200 r / min for 3-18 h; and then slurry is taken out and separated, and through drying and staged treatment, the scale-like metal powder material coated with the graphene is obtained. After the material is kneaded, reduced and modified, the different graphene scale-like metal powder materials with the amphipathic property can be obtained. The graphene is used as a surface coating agent of the scale-like metal powder material, and thus the problem of dipersion of the graphene in coating and the electricity conducting problem of the coating agent are solved; and the technique is simple, the efficiency is high, the production stability is good, and the flaky metal powder material is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of preparation of metal-based pigments and fillers, in particular to a graphene-coated flake metal powder material and a preparation method thereof. Background technique [0002] Graphene is a new type of material that has attracted much attention in recent years. Due to its good shielding properties, large specific surface area, and good electrical conductivity, graphene can effectively improve the corrosion resistance of coatings as an additive, and has a wide range of applications in the field of metal anti-corrosion coatings. Prospects have attracted the attention of researchers. The patent application number 201510497999.X discloses a formulation of a two-component graphene anti-corrosion coating, which can greatly reduce the thickness of the coating film, improve the anti-corrosion effect, and reduce the amount of zinc powder. The patent with the application number 201510203553.1 discloses an anti-corrosion coa...

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): B22F9/04B22F1/02
CPCB22F9/04B22F2009/042B22F1/068B22F1/16
Inventor 焦志伟周伟刘伟
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY