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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 strength and low quality of graphene/aluminum composite materials, and achieves low thermal expansion coefficient, easy industrial production and application, and specific stiffness. and the effect of enhancement than the intensity factor

Active Publication Date: 2017-05-03
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 0.02 g of graphene oxide powder and 19.98 g of ethanol solution, stir evenly, emulsify and ultrasonicate for 20 minutes, and prepare a graphene oxide alcohol solution with a mass fraction of 0.1%;

[0024] Step 2, according to the calculation that the mass ratio of graphene oxide and aluminum powder is 0.001:1, take 10 g of the resulting graphene oxide alcohol solution, stir at a speed of 100~1000 rpm, and slowly add 10 g of aluminum powder, and control the temperature is not high At room temperature, after stirring for 3h, obtain a graphene oxide homogeneous alcohol solution containing aluminum powder;

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

[0026] Step 4, the obtained graphene oxide / aluminum composite dry powder is heated in Ar / H 2 Thermal reduct...

Embodiment 2

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

[0029] Step 2, according to the calculation that the mass ratio of graphene oxide and aluminum powder is 0.1:1, take 100 g of the obtained graphene oxide alcohol solution, stir at a speed of 100~1000 rpm, and slowly add 10 g of aluminum powder, and control the temperature is not high At room temperature, after stirring for 3h, obtain a graphene oxide homogeneous alcohol solution containing aluminum powder;

[0030] Step 3 is the same as in Embodiment 1, and will not be described in detail;

[0031] Step 4, the obtained graphene oxide / aluminum composite dry powder is heated in Ar / H 2 Thermal reduction was carried out under a mixed atmosphere, the reduction temperature was between 450 °C, the constant temperature time was 1 h, and the air flow rate was 800 mL / min. Final...

Embodiment 3

[0033] Step 1, take 4g of graphene oxide powder, 198g of ethanol solution, after stirring evenly, emulsify and ultrasonic for 20min, prepare a graphene oxide alcohol solution with a mass fraction of 2%;

[0034] Step 2, according to the calculation that the mass ratio of graphene oxide and aluminum powder is 0.2:1, take 100 g of the resulting graphene oxide alcohol solution, stir at a speed of 100~1000 rpm, and slowly add 10 g of aluminum powder, and control the temperature is not high At room temperature, after stirring for 3h, obtain a graphene oxide homogeneous alcohol solution containing aluminum powder;

[0035] Step 3, with embodiment 1, no longer repeats;

[0036] Step 4, the obtained graphene oxide / aluminum composite dry powder is heated in Ar / H 2 Thermal reduction was carried out under a mixed atmosphere, the reduction temperature was between 500 °C, the constant temperature time was 1.5 h, and the air flow rate was 600 mL / min. Finally, a graphene / aluminum composite ...

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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 preparation method of a composite material, in particular to a preparation method of a graphene / aluminum composite material. Background technique [0002] Graphene is the toughest material with the best electrical and thermal conductivity found in the laboratory so far. Its strength is as high as 1.01TPa, which is 100 times that of structural steel, but its density is 1 / 5 of that of structural steel. Graphene is considered to be a very promising reinforcement due to its low density, high mechanical properties, high thermal conductivity, and low thermal expansion. Adding graphene into the metal matrix to obtain a new type of composite material, this type of composite material has the characteristics and functions that people need, so the research on using graphene to strengthen metal matrix (especially aluminum matrix) composite materials has attracted widespread attention . [0003] Since 2011, researchers from various coun...

Claims

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Application Information

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Patent Type & Authority Patents(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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