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Preparation method of graphene/aluminum composite material

An aluminum composite material and graphene technology, which is applied in the field of composite material preparation, can solve the problems of low quality and low strength of graphene/aluminum composite materials, and achieve enhanced specific stiffness and specific strength coefficient, low thermal expansion coefficient, and economical cost performance. high effect

Active Publication Date: 2016-02-24
TANGSHAN JIANHUA TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low quality and low strength of the graphene / aluminum composite material prepared by the above-mentioned solid-state method, the present invention provides a method for preparing a high-quality graphene / aluminum composite material by a liquid method, and the prepared composite material has high Strength, low thermal expansion coefficient and many advantages, and easy to realize industrial production and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: Take 0.02g of graphene oxide powder and 19.98g of ethanol solution, stir evenly, emulsify and sonicate for 20 minutes to prepare a graphene oxide alcohol solution with a mass fraction of 0.1%;

[0024] Step 2: Calculate according to the mass ratio of graphene oxide to aluminum powder of 0.001:1, take 10g of the obtained graphene oxide alcohol solution, stir at 100~1000 rpm, and slowly add 10g of aluminum powder, control the temperature not high After stirring for 3 hours at room temperature, a homogeneous alcohol solution of graphene oxide containing aluminum powder is obtained;

[0025] Step 3: The obtained alcohol solution is subjected to solid-liquid separation through filtration and centrifugation processes, and the separated paste-like solid is processed by a freeze-drying process to obtain graphene oxide / aluminum composite dry powder;

[0026] Step four, the obtained graphene oxide / aluminum composite dry powder is in Ar / H 2 Thermal reduction is carried out in a m...

Embodiment 2

[0028] Step 1: Take 2g of graphene oxide powder and 198g of ethanol solution, stir evenly, emulsify and ultrasonicate for 20 minutes to prepare a 1% graphene oxide alcohol solution;

[0029] Step 2: Calculate based on the mass ratio of graphene oxide to aluminum powder of 0.1:1, take 100g of the obtained graphene oxide alcohol solution, stir at 100~1000 rpm, and slowly add 10g of aluminum powder, control the temperature not high After stirring for 3 hours at room temperature, a homogeneous alcohol solution of graphene oxide containing aluminum powder is obtained;

[0030] Step three is the same as embodiment 1, and will not be repeated;

[0031] Step four, the obtained graphene oxide / aluminum composite dry powder is in Ar / H 2 Thermal reduction is performed in a mixed atmosphere, the reduction temperature is between 450°C, the constant temperature time is 1h, and the air flow is 800mL / min. Finally, a graphene / aluminum composite material with a mass fraction of 10% is obtained.

Embodiment 3

[0033] Step 1: Take 4g of graphene oxide powder and 198g of ethanol solution, stir evenly, emulsify and sonicate for 20 minutes to prepare a graphene oxide alcohol solution with a mass fraction of 2%;

[0034] Step 2: Calculate according to the mass ratio of graphene oxide to aluminum powder of 0.2:1, take 100g of the obtained graphene oxide alcohol solution, stir at 100~1000 rpm, and slowly add 10g of aluminum powder, control the temperature not high After stirring for 3 hours at room temperature, a homogeneous alcohol solution of graphene oxide containing aluminum powder is obtained;

[0035] Step three is the same as embodiment 1, and will not be repeated;

[0036] Step four, the obtained graphene oxide / aluminum composite dry powder is in Ar / H 2 Thermal reduction is carried out in a mixed atmosphere, the reduction temperature is between 500°C, the constant temperature time is 1.5h, and the air flow is 600mL / min. Finally, a graphene / aluminum composite material with a mass fraction ...

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Abstract

The invention discloses a preparation method of a graphene / aluminum composite material. The preparation method specifically includes the following steps that graphene oxide powder is evenly dispersed in an alcohol solution, and a graphene oxide alcoholic solution is prepared after emulsification and ultrasonic treatment; aluminum powder is slowly added under stirring, temperature is controlled to be not higher than room temperature, stirring speed is controlled to be 100-1000 r / min, stirring time lasts for 1-5 h, and the uniform graphene oxide alcoholic solution containing the aluminum powder is obtained; solid and liquid separation is performed through the filtering technology and the centrifugal technology, and graphene oxide / aluminum dry powder is obtained after separated paste solid is frozen and dried; and the dry powder is subjected to heat reduction under Ar / H2 mixed atmosphere, and finally the graphene / aluminum composite material is prepared. The graphene / aluminum composite material prepared through the method has the beneficial effects of being high in strength, low in heat expansion coefficient and the like, and the specific stiffness coefficient and the special strength coefficient are remarkably increased. The method is simple in technology and efficient, industrialized production and application can be easily achieved.

Description

Technical field [0001] The invention relates to a method for preparing a composite material, in particular to a method for preparing a graphene / aluminum composite material. Background technique [0002] Graphene is the toughest, most conductive and thermally conductive material found in the laboratory so far. Its strength is as high as 1.01 TPa, which is 100 times that of structural steel, but its density is 1 / 5 of structural steel. Due to its low density, high mechanical properties, high thermal conductivity and low thermal expansion, graphene is considered a very promising reinforcement. Graphene is added to the metal matrix to obtain a new type of composite material. This type of composite material has the characteristics and functions that people need. Therefore, the use of graphene to enhance the research of metal-based (especially aluminum-based) composite materials has attracted wide attention. . [0003] Since 2011, researchers from various countries have begun to study t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/05
CPCC22C1/0416C22C1/05C22C21/00
Inventor 吴洪鹏孟英侯林艳王建华李小莉
Owner TANGSHAN JIANHUA TECH DEV
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