A kind of preparation method of high-structure complete high-dispersion graphene/metal composite material

A composite material and graphene technology, applied in graphene, metal processing equipment, transportation and packaging, etc., can solve the problems of many structural defects, unfavorable mechanical properties, insufficient graphene reduction, etc., to achieve small damage, excellent characteristics, Effects that are cheap to manufacture

Active Publication Date: 2018-12-14
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method disperses graphene evenly, but the disadvantage is that the reduction of graphene is insufficient, and there are many structural defects, which is not conducive to the improvement of mechanical properties.

Method used

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  • A kind of preparation method of high-structure complete high-dispersion graphene/metal composite material
  • A kind of preparation method of high-structure complete high-dispersion graphene/metal composite material
  • A kind of preparation method of high-structure complete high-dispersion graphene/metal composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Aluminum powder-coated cationic surfactant: Add flaky aluminum powder with a thickness of about 500nm into 1wt.% cetyltrimethylammonium chloride alcohol solution, stir for about 1 hour, filter and rinse to obtain cationic surfactant Flake aluminum powder coated with surfactant.

[0037] Preparation of graphene dispersion: configure a mixed aqueous solution containing 2wt.% sodium dodecylbenzenesulfonate and 2wt.% ammonium sulfate as the electrolyte; connect the graphite paper to the anode of the power supply, connect the copper wire to the cathode of the power supply, and connect the cathode to the anode With a distance of 4 cm, the electrochemical stripping was performed in the above electrolyte at a loading voltage of 10 V. After the peeled product is filtered, rinsed, ultrasonically dispersed and centrifuged to obtain a uniformly dispersed graphene aqueous solution, the corresponding anode material, peeled product and graphene dispersion are as follows: figure 1 As ...

Embodiment 2

[0043] Copper powder-coated cationic surfactant: Add flaky copper powder with a thickness of about 800nm ​​into 1wt.% cetyltrimethylammonium chloride alcohol solution, stir for about 1 hour, filter and rinse to obtain cationic surfactant Activator coated flake copper powder.

[0044] Preparation of graphene dispersion: configure a mixed aqueous solution containing 3wt.% sodium dodecylbenzenesulfonate and 2wt.% ammonium sulfate as the electrolyte; connect the graphite rod to the anode of the power supply, connect the copper wire to the cathode of the power supply, and connect the cathode to the anode With a distance of 2 cm, the electrochemical stripping was performed in the above electrolyte at a loading voltage of 8 V. The stripped product is filtered, rinsed, ultrasonically dispersed and centrifuged to obtain a uniformly dispersed graphene aqueous solution.

[0045] Composite material powder preparation: add 300g flake copper powder to 800ml graphene aqueous solution with a...

Embodiment 3

[0050] The preparation of the graphene dispersion is the same as in Example 2, except that after the flaky Cu powder has adsorbed the graphene, the coating of the cationic surfactant is repeated, and then 800ml of graphene with a concentration of 0.6mg / ml is added. The graphene is continuously adsorbed in the aqueous solution, and the obtained composite material powder is cold-pressed, hot-pressed and hot-extruded to obtain a dense 1vol.% graphene / copper composite material.

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Abstract

The invention belongs to the technical field of composite material preparation, and in particular relates to a preparation method of a graphene-reinforced metal matrix composite material with high structural integrity and high dispersibility. This approach enables good dispersion of highly structurally complete graphene in metal matrices. The present invention uses ordinary graphite as a raw material, adopts electrochemical stripping in a mixed aqueous solution of anionic surfactant and sulfate, and quickly obtains a graphene aqueous solution with high structural integrity and good suspension, and then treats it with cationic surfactant The metal powder is mixed, so that the graphene is uniformly adsorbed on the surface of the metal powder, and then the graphene-reinforced metal matrix composite is prepared by using the traditional powder metallurgy process. The advantages of the present invention are: (1) the raw material adopts ordinary graphite, and the cost is low; (2) the graphene structure integrity in the prepared composite material is high, and the dispersion is good; (3) the whole preparation process is efficient, environmentally friendly, and has a small batch Large-scale production capacity.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and specifically provides a method for preparing a graphene-reinforced metal matrix composite material with high structural integrity and high dispersion. This method can realize the uniform dispersion of graphene in the metal matrix while ensuring the graphene has good structural integrity. Background technique [0002] Graphene has extremely high mechanical properties (tensile strength >30GPa, elastic modulus ~1GPa), good thermal and electrical properties, and is considered to be an ideal reinforcement for composite materials. Graphene-reinforced metal matrix composites have high specific strength, high specific stiffness, and potentially excellent electrical and thermal conductivity, and have broad application prospects in aerospace, automobile manufacturing, microelectronics and other fields. Graphene is non-wetting to most metals and their alloys, limiting conventi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10B22F1/00C22C32/00C01B32/19
CPCC22C1/05C22C32/0084B22F1/102
Inventor 刘振宇马宗义肖伯律倪丁瑞王全兆王东张星星
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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