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Graphene and carbon nanotube mixed enhanced metal-matrix composite material and preparation method thereof

A carbon nanotube and composite material technology, which is applied in the field of graphene and carbon nanotube hybrid reinforced metal matrix composite materials and their preparation, can solve the problems of insignificant improvement in thermal conductivity and electrical conductivity, limited volume content and low absolute value, etc. Achieve excellent mechanical and electrical conductivity, easy agglomeration, and low cost

Active Publication Date: 2012-10-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since only a single carbon nanotube or graphene reinforcement is contained, the above-mentioned composite material exhibits the following deficiencies: (1) Although the mechanical properties of a single metal matrix composite material reinforced by carbon nanotubes have been significantly improved, its thermal conductivity and electrical conductivity The performance improvement is not obvious, and sometimes it is reduced compared to the metal matrix; (2) The mechanical, thermal and electrical properties of the single graphene-reinforced metal matrix composite have been improved, but the problem is that graphene The specific surface area of ​​carbon nanotubes is much larger than that of carbon nanotubes, so the volume content that can be uniformly dispersed in the metal matrix is ​​very limited, usually no more than 1%, so the absolute value of the final performance improvement of the composite material is not high

Method used

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  • Graphene and carbon nanotube mixed enhanced metal-matrix composite material and preparation method thereof
  • Graphene and carbon nanotube mixed enhanced metal-matrix composite material and preparation method thereof
  • Graphene and carbon nanotube mixed enhanced metal-matrix composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Add 40mg of graphite oxide powder and 200mg of carbon nanotubes into 200mL of deionized water at the same time, and disperse them uniformly by ultrasonic dispersion for 2 hours to obtain a mixed solution of 0.2mg / mL graphene oxide and 1.0mg / mL carbon nanotubes. For TEM images see image 3 ;

[0050] Under the condition of heating in a constant temperature water bath at 98°C, dissolve polyvinyl alcohol in deionized water, stir it until it is completely dissolved, add deionized water after cooling to room temperature to adjust the concentration of polyvinyl alcohol, and obtain a 3wt.% polyvinyl alcohol aqueous solution;

[0051] Take 100g of spherical aluminum powder with a thickness of 45 μm and 500 mL of absolute ethanol, and add them together to a stirring ball mill for wet ball milling for 2 hours to obtain flake aluminum powder with a thickness of 4 μm. Due to the active chemical properties of aluminum metal, it may react chemically with carbon substances, so a cert...

Embodiment 2

[0073] 100mg of graphite oxide powder and 600mg of carbon nanotubes were added to 200mL of absolute ethanol and a small amount of sodium lauryl sulfate, and ultrasonically dispersed for 2 hours to make them uniformly dispersed to obtain 0.5mg / mL graphene oxide and 3.0mg / mL mL of carbon nanotube solution;

[0074] Dissolving polyvinylpyrrolidone in ethanol and adding a small amount of hydrazine hydrate to it, mechanically stirring until completely dissolved, cooling to room temperature, adding ethanol to adjust the concentration of polyvinylpyrrolidone to obtain a 5wt.% polyvinylpyrrolidone ethanol solution;

[0075] Take 200g of copper powder and 200mL of pure water, and add them together to a planetary ball mill for wet grinding to obtain a slurry of flaky copper powder with a thickness of 500nm, and then carry out suction filtration and drying to obtain a copper powder with a thickness of 1 μm;

[0076] Take 100g of copper powder, and add it to 1L of 5wt.% polyvinylpyrrolido...

Embodiment 3

[0080] 200mg of graphite oxide powder and 1000mg of carbon nanotubes were added to 200mL of deionized water respectively, and a small amount of surfactant chitosan was added, and ultrasonically dispersed for 2 hours to make them uniformly dispersed to obtain a 1.0mg / mL graphene oxide solution and 5.0 mg / mL carbon nanotube solution;

[0081] Under the condition of heating in a constant temperature water bath at 98°C, dissolve polyvinyl alcohol in deionized water, add a small amount of reducing agent ethylenediamine, stir mechanically until it is completely dissolved, and add deionized water after cooling to room temperature to adjust the concentration of polyvinyl alcohol to obtain 0.5wt.% polyvinyl alcohol aqueous solution;

[0082] Take 200g of aluminum alloy 6061 powder and 500mL of absolute ethanol, and add them together to a stirring ball mill for wet grinding to obtain flaky 6061 powder with a thickness of 500nm, which is the required flaky 6061 powder;

[0083] Take 100...

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Abstract

The invention discloses a graphene and carbon nanotube mixed enhanced metal-matrix composite material and a preparation method thereof. The graphene and carbon nanotube mixed enhanced metal-matrix composite material is characterized in that graphene and a carbon nanotube are mutually connected to constitute an enhanced network in a metal matrix, wherein the graphene is few-layer graphene with 10 layers or less, the radius-thickness ratio of the graphene is larger than 200, and the volume fraction of the graphene is 0.1-1%; and the carbon nanotube is a single-wall, double-wall or multi-wall carbon nanotube, the length-diameter ratio of the carbon nanotube is larger than 20, and the volume fraction of the carbon nanotube is 0.5-5%. Compared with the composite material enhanced only by the carbon nanotube, the graphene and carbon nanotube mixed enhanced metal-matrix composite material disclosed by the invention not only has greatly improved mechanical properties, but also has more excellent electric conduction and heat conduction properties, and is a multi-purpose structure and function integrated material. In addition, the preparation method provided by the invention based on slurry blending and graphene oxide reduction is simple and efficient and is easy for large-scale production.

Description

technical field [0001] The invention relates to a hybrid reinforced composite material and a preparation method thereof, in particular to a graphene and carbon nanotube hybrid reinforced metal matrix composite material and a preparation method thereof. Background technique [0002] In recent years, carbonaceous nanomaterials have attracted much attention. Among them, the research on the application of carbon nanotubes has matured day by day, and is widely used in the fields of electronic materials and composite materials. In the field of composite materials, carbon nanotubes are considered as ideal reinforcements. Introducing carbon nanotubes into light alloy matrices such as aluminum, magnesium, and titanium is the main direction of research and development of a new generation of metal matrix composites, and is expected to be a lightweight structural material in the future. Since single-walled carbon nanotubes are the most difficult to prepare, cost the most, and are also...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/05B22F1/02C01B31/04C01B32/184
Inventor 李志强王景月李赞范根莲张荻
Owner SHANGHAI JIAO TONG UNIV
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