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Preparation method for graphene/copper composite powder material

A composite powder and graphene technology, applied in graphene, nano-carbon and other directions, can solve the problems of high cost, prone to agglomeration, uneven composition, etc., and achieve the effect of mass production, uniform dispersion and stable structure

Active Publication Date: 2017-12-22
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the above problems such as uneven mixing of graphene and copper, prone to agglomeration, poor interfacial bonding, high cost, or the need to add additional surfactants. The present invention uses surfactant-free molecular level mixing and The combination of spray-drying technology can make graphene and copper mix at the molecular level without adding surfactant and the interface is well bonded. Uniform, non-agglomerated purpose
Spray drying is carried out while shearing and stirring, while ensuring uniform mixing, it also solves the problem of uneven composition caused by different precipitation speeds of solutes in the solution

Method used

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  • Preparation method for graphene/copper composite powder material
  • Preparation method for graphene/copper composite powder material
  • Preparation method for graphene/copper composite powder material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Get 1800mL concentration and be that the graphene oxide (carbon content is 65%) aqueous solution that is 1.2mg / mL, and stir with rotating speed 1500rpm in high-speed shear mixer, then add 120 grams of copper acetate monohydrate (copper The content is 38.2g). After the mixing is completed, continue to carry out high-speed shear stirring at the same speed, and use a spray dryer (small spray dryer H-Spray Mini, Beijing Halls Biotechnology Co., Ltd.) to dry the mixed solution at the same time, and the extraction volume is 6mL / min. The wind temperature is 220°C, and the air outlet temperature is 120°C (drying gas flow rate is 800L / h, the same as in the following examples). In the spray drying process, the high-speed shear stirring can be taken in an intermittent manner, and the shear speed is 1500rpm. Among them, the high-speed shear When cutting and stirring, keep the temperature of the solution at 30-35°C. When the solution temperature reaches 35°C, stop shearing and stirr...

Embodiment 2

[0025] Take 1800mL of graphene oxide aqueous solution whose concentration is 0.12mg / mL, wherein the carbon content in graphene oxide is 65%, and stir in a high-speed shear mixer at a speed of 2000rpm, and then add 120 grams of acetic acid monohydrate during the stirring process Copper, wherein the copper content is 38.2g. After the mixing is completed, use a spray dryer (small spray dryer H-Spray Mini, Beijing Halls Biotechnology Co., Ltd.) to dry the mixed solution. ℃, the high-speed shear stirring is intermittently used during the spray drying process, and the shear speed is 2000rpm to ensure that the mixed solution does not exceed 35°C during the whole process. Shear stirring at the same speed was resumed again. After spray drying, the precursor powder was obtained, and the temperature was raised in a hydrogen atmosphere at a rate of 200°C / min. After reaching 350°C, the temperature was kept for 30 minutes, and the mixed powder was reduced. A graphene / copper composite powd...

Embodiment 3

[0027] Take 1800mL of graphene oxide aqueous solution with a concentration of 0.04mg / mL, wherein the carbon content in graphene oxide is 65%, and stir in a high-speed shear mixer at a speed of 2000rpm, and then slowly add 120 grams of monowater during the stirring process Copper acetate, wherein the copper content is 38.2g. After the mixing is completed, use a spray dryer (small spray dryer H-Spray Mini, Beijing Halls Biotechnology Co., Ltd.) to dry the mixed solution. ℃, the high-speed shear stirring is intermittently used during the spray drying process, and the shear speed is 1500rpm to ensure that the mixed solution does not exceed 35°C during the whole process. Resume shear stirring at the same speed. After spray drying, the precursor powder was obtained, and the temperature was raised in a hydrogen atmosphere at a rate of 10°C / min. After reaching 350°C, the temperature was kept for 30 minutes, and the mixed powder was reduced. A graphene / copper composite powder with a ...

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Abstract

The invention relates to a preparation method for a graphene / copper composite powder material. The method comprises the following steps: adding cupric acetate into a graphene oxide aqueous solution while quickly shearing and stirring the mixed solution; keeping quick shearing and stirring for the mixed solution after completely adding, and meanwhile, adopting a spray dryer for continuously extracting the mixed solution and performing spray drying, thereby acquiring precursor graphene oxide / cupric acetate powder; and raising the temperature of the acquired precursor powder to 350-700 DEG C under reducing atmosphere and keeping the temperature for 15-30min, thereby acquiring the graphene / copper composite powder material. The present graphene oxide reduction preparation equipment is used, the method is simple and efficient, the cost is lower and the preparation method is suitable for wide industrial application and popularization.

Description

technical field [0001] The invention relates to the field of graphene / metal composite materials, in particular to a method for preparing a graphene / copper powder composite powder material. Background technique [0002] Graphene is a two-dimensional crystalline ultra-thin material with only one atomic layer thickness composed of sp2 hybridized carbon atoms connected to each other, and can exist stably at room temperature. From traditional graphite to carbon fiber, and then to carbon nanotubes and graphene, the application of carbon materials as a reinforcing phase in metal matrix composites has always been a hot spot. Good wear resistance, lubricity, high specific strength, specific modulus of elasticity, and damping properties make graphite and carbon fiber reinforced metal matrix composites, especially copper-based materials, widely used in vehicles, special equipment, aerospace and other fields . Graphene is considered to be a very promising reinforcement due to its low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184B22F9/22
CPCB22F9/22C01P2002/82C01P2004/03
Inventor 冀璞光祁丹丹殷福星冯建航王恭凯马玉凤王以春
Owner HEBEI UNIV OF TECH
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