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3D (three-dimensional) printing graphene-metal composite material, and preparation method and application thereof

A metal composite material, 3D printing technology, applied in the direction of graphene, nanotechnology for materials and surface science, electrical components, etc., can solve the problem of not fully reflecting the performance advantages of high hardness, high strength and high thermal conductivity of graphene materials , Strong intermolecular chemical bonds, high surface activity, etc., to avoid stacking and agglomeration, easy processing and use, and promote densification

Active Publication Date: 2017-05-31
尹宗杰 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, although graphene and its composite materials and technologies have been applied to many fields, and their performance has been improved and improved, graphene with high hardness and high strength has high surface activity energy, intermolecular forces and chemical bonds. The effect is strong and inevitably easy to reunite
Therefore, due to stacking and agglomeration during the preparation of graphene composite materials, the performance advantages of high hardness, high strength and high thermal conductivity of graphene materials cannot be fully reflected. This problem limits its application in a wider and wider range. field application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The 3D printing graphene-metal composite material of the present embodiment, its preparation method comprises the steps:

[0023] (1) Under the action of an ultrasonic probe (ultrasonic frequency is 10KHz), graphene quantum dots and nano-zirconia powder are mixed at a mass ratio of 1:19, and the mixture uses polyethylene glycol as a solvent for high-pressure physical grinding and shearing, and the pressure 250MPa, the time is 1h, the temperature is 2°C, and the composite slurry material is prepared;

[0024] (2) Vacuum-dry the prepared composite slurry material at a pressure of 150 Pa, a drying time of 60 min, and a drying temperature of 30° C. to obtain a 3D printed graphene-metal composite material.

[0025] In other embodiments, graphene quantum dots can also be replaced by graphene microplates or a mixture of graphene quantum dots and graphene microplates; the pressure of vacuum drying can be in the range of 150-1000Pa, and the drying time is 5-60min .

Embodiment 2

[0027] The application method of the 3D printing graphene-metal composite material of embodiment 1 is: after 3D printing the 3D printing graphene-metal composite material, utilize fiber laser system to carry out sintering, quenching, laser frequency is 70kHz, laser power is 100W , the diameter of the spot is 0.2mm, the scanning speed is 0.5mm / s, and the scanning distance is 0.7mm, and the laser sintering 3D printing product is obtained.

Embodiment 3

[0029] The 3D printing graphene-metal composite material of the present embodiment, its preparation method comprises the steps:

[0030] (1) Under the action of an ultrasonic reactor (ultrasonic frequency is 100KHz), the graphene microflakes and nano-titanium dioxide powder are mixed at a mass ratio of 1:25, and pure water is used as a solvent in a ball mill for high-pressure physical grinding and shearing, with a pressure of 180MPa , the time is 12h, the temperature is 18°C, and the composite slurry material is prepared;

[0031] (2) Dry the prepared composite slurry material under normal pressure, the drying time is 200min, and the drying temperature is 80°C to obtain a 3D printed graphene-metal composite material.

[0032] In other embodiments, the drying time of normal pressure drying may be 100-500 min, and the drying temperature may be within the range of 50-120°C.

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Abstract

The invention relates to a 3D (three-dimensional) printing graphene-metal composite material, and a preparation method and application thereof. The preparation method comprises the steps that (1) under the ultrasonic effect, graphene quantum dots and / or graphene microchips and nanometer metal simple substances / nanometer metal compounds are mixed, ground and sheared to prepare a composite slurry material or a composite powder material, wherein the ultrasonic frequency is 10 to 100 KHz, and the weight of the graphene quantum dots and / or graphene microchips accounts for 0.01 to 35 percent of the total weight; (2) the prepared composite slurry material or the powder material is dried. A laser sintering graphene metal substance composite material and a preparation method thereof are provided for the 3D printing; the obtained composite material has the excellent performance of high hardness, high intensity, corrosion resistance, easy-to-process performance and easy-to-use performance; after 3D printing, the laser can be used for sintering and quenching; the particle compaction of the composite material is promoted; crystalline grains are refined, so that the mechanical performance of a 3D printing product is improved.

Description

technical field [0001] The invention relates to the technical field of graphene application, in particular to a 3D printing graphene-metal composite material, a preparation method and an application. Background technique [0002] Single-layer graphene sheets are composed of a dense layer of carbon six-membered rings without any structural defects. Its thickness is about 0.35nm, which is the thinnest two-dimensional nano-carbon material so far. At the same time, it is also the basic unit of other carbon materials. It can be warped to obtain zero-dimensional fullerene, curled to obtain one-dimensional carbon nanotubes and stacked to obtain three-dimensional graphite. The most basic repeating period unit in graphene is the most stable benzene ring junction groove in organic chemistry, and it is the best two-dimensional nanomaterial so far. Graphene prepared in reality not only exists single-layer, but also multi-layer. Due to its unique structure, various properties of graphe...

Claims

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Application Information

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IPC IPC(8): C01B32/184C01B32/182H01M4/583B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/583Y02E60/10
Inventor 尹宗杰楚双印
Owner 尹宗杰
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