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Preparing method for graphene-metal base composite powder

A metal-based composite and composite powder technology, which is applied in the field of graphene-metal-based composite powder preparation, can solve the problems of graphene easy to agglomerate, achieve process stability, improve graphene agglomeration, and reduce equipment investment.

Active Publication Date: 2017-05-17
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of graphene-metal matrix composite powder, which solves the problem that graphene is easy to agglomerate in the powder in the existing preparation method

Method used

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  • Preparing method for graphene-metal base composite powder
  • Preparing method for graphene-metal base composite powder
  • Preparing method for graphene-metal base composite powder

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preparation example Construction

[0023] The preparation method of the graphene-metal matrix composite powder of the present invention is specifically implemented according to the following steps:

[0024] Step 1, mixing graphene oxide and deionized water and ultrasonically dispersing evenly to obtain a graphene dispersion; ultrasonicating silver nitrate or copper sulfate in absolute ethanol to obtain a silver nitrate solution or a copper sulfate solution;

[0025] Step 2, according to the mass ratio of graphene oxide and copper sulfate is 1:2.5-16, the graphene oxide solution and copper sulfate solution are mixed, or, according to the mass ratio of graphene oxide and copper sulfate is 1:1.5- 5 ratio, mix the graphene oxide solution and the copper sulfate solution, stir in a water bath at 70°C-90°C and add hydrazine hydrate for reaction (use 1ml hydrazine hydrate for every 5-16mg of silver nitrate or use 1ml of hydrazine hydrate for every 15-25mg of copper sulfate 1ml hydrazine hydrate), after the reaction is ...

Embodiment 1

[0030] Step 1, disperse 50mg of graphene oxide in 100mg of deionized water, and disperse in a 40KHz ultrasonic environment for 2h; obtain a graphene oxide dispersion; disperse 125mg of silver nitrate and 10ml of absolute ethanol in a 40KHz ultrasonic environment for 2h, to obtain silver nitrate solution;

[0031] Step 2: Pour the silver nitrate solution into the graphene dispersion and transfer it to a constant temperature water bath at 80°C for electromagnetic stirring. At the same time, add 5ml of hydrazine hydrate with a concentration of 75% to react for 2h, cool to room temperature, and use deionized water and Anhydrous ethanol was centrifuged three times respectively, and the precipitate after centrifugation was dried at a temperature lower than 60°C with an electric heating mantle to obtain a non-oxidized graphene-loaded silver composite powder;

[0032] Step 3, mix 0.5g of the graphene-loaded silver composite powder obtained in step 2 with 300ml of absolute ethanol, cru...

Embodiment 2

[0035] Step 1, disperse 50mg of graphene oxide in 75mg of deionized water, and disperse in 40KHz ultrasonic environment for 2h to obtain graphene oxide dispersion; disperse 500mg of silver nitrate and 10ml of absolute ethanol in 40KHz ultrasonic environment for 2h to obtain silver nitrate solution;

[0036] Step 2: Pour the silver nitrate solution into the graphene dispersion and transfer it to a constant temperature water bath at 70°C for electromagnetic stirring. At the same time, add 5ml of hydrazine hydrate with a concentration of 75% to react for 1.5h, cool to room temperature, and use deionized water Centrifuge with absolute ethanol for 3 times, and dry the precipitate after centrifugation at a temperature below 60°C with an electric heating mantle to obtain a non-oxidized graphene-loaded silver composite powder;

[0037] Step 3, mix 0.5g of the graphene-loaded silver composite powder obtained in step 2 with 300ml of absolute ethanol, crush and disperse for 10min in a ce...

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Abstract

The invention discloses a preparing method for graphene-metal base composite powder. Oxidized graphene and deionized water are mixed, subjected to ultrasounds and dispersed evenly; meanwhile silver nitrate or copper sulfate is subjected to ultrasounds in absolute ethyl alcohol; then a silver nitrate or copper sulfate solution is poured into a graphene dispersion solution, stirring is conducted under the water bath condition, hydrazine hydrate is added for a reaction, washing, filtering and drying are conducted after the reaction is completed, and the graphene load metal composite powder is obtained; the graphene load metal composite powder and the absolute ethyl alcohol are mixed, dispersed and homogenized, then silver powder or copper powder is added for ultrasound mixing, drying is conducted, and the graphene-metal base composite powder is obtained. Little graphene in the obtained graphene-metal base composite powder is agglomerated and is not oxidized, the powder mixing time is short, efficiency is high, the graphene-metal base composite powder can be directly used for preparing block graphene-metal base composite powder, and raw materials are provided for the subsequent technology.

Description

technical field [0001] The invention belongs to the technical field of preparation of composite materials, and in particular relates to a preparation method of graphene-metal matrix composite powder. Background technique [0002] Graphene is a carbon atom with sp 2 A honeycomb-like two-dimensional lattice planar film arranged in hybrid orbitals. The thickness is about 0.335nm, which is the thinnest material in the world and has a large specific surface area. Each C atom has four valence electrons, and each carbon atom is connected by a highly polar σ bond. After the σ bond is formed, each carbon atom still has an unbonded π electron, which can be used in Free to move freely in the crystal, so its conductivity is super strong, and it can be introduced into the composite material as a good carrier. [0003] Metallic copper and metallic silver have high thermal conductivity, electrical conductivity and formability, and are important matrix materials for the preparation of th...

Claims

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Application Information

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IPC IPC(8): B22F9/24
CPCB22F9/24
Inventor 张会
Owner SHAANXI SCI TECH UNIV
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