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A kind of graphene composite metal foam and preparation method thereof

A technology of graphene composite and metal foam, applied in the direction of non-metallic elements, chemical instruments and methods, carbon compounds, etc., can solve the problems of high cost, low production efficiency, unsuitable for industrial production, etc., and achieve good dispersion performance and stable dispersion good sex effect

Active Publication Date: 2020-09-11
徐海波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] CN101831622A discloses a chemical vapor deposition method, which deposits graphene on the calcined metal foam material. This method has low production efficiency and high cost, and is not suitable for industrial production

Method used

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  • A kind of graphene composite metal foam and preparation method thereof
  • A kind of graphene composite metal foam and preparation method thereof
  • A kind of graphene composite metal foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Using T700SC 24K (24,000 monofilaments) polyacrylonitrile-based carbon fiber tows as raw materials, trim the tip surfaces of the above 78 carbon fiber tows, and place them vertically above the electrolytic cell filled with a 0.5M ammonium carbonate aqueous solution. As an anode, it is connected to the positive pole of the DC power supply; then an area of ​​100cm 2 The SS 304 stainless steel net is fully immersed in the ammonium carbonate aqueous solution, and is connected as the cathode to the negative pole of the DC power supply; carefully adjust the parallel distance between the neat tip surface of the carbon fiber tow and the liquid surface of the solution before powering on, so as to just touch the liquid surface As the standard, the error of allowing the tip surface to enter the solution is no more than 5mm relative to the liquid surface; then turn on the DC power supply, control the constant voltage 32V, and start working. Climbing, at this time, the carbon fiber ...

Embodiment 2

[0065] It is basically the same as Example 1, the main difference is: the dispersion of the composite nanomaterial composed of graphene oxide quantum dots and graphene obtained in the above way is diluted to a concentration of 0.2mg / mL, and a porosity of 98%, pore diameter An open-cell foamed copper alloy plate (length 2cm, width 2cm, thickness 1cm) with an average of 0.25mm is placed in an open stainless steel container (inner cavity size: length 2.2cm, width 2.2cm, thickness 1.5cm), and then the above Pour the dispersion liquid into the container so that the foamed copper alloy plate is completely submerged, put it into a vacuum drying oven, vacuumize and heat to 60°C for drying treatment, and after all the water is completely evaporated, an oxide layer formed on the surface of the foamed copper alloy plate A graphene layer composed of graphene quantum dots and graphene layers (its thickness is 1 μm, and the plane conductivity is 2000S cm -1 , the plane thermal conductivity ...

Embodiment 3

[0067] Using 0.1mm thick graphite paper as raw material, place it vertically above the electrolytic cell filled with 0.1M sodium sulfate aqueous solution, and connect it as an anode to the positive pole of the DC power supply; 2 The nickel sheet is fully immersed in the sodium sulfate aqueous solution, and is connected as the cathode to the negative electrode of the DC power supply; carefully adjust the parallel distance between one end surface of the graphite paper and the liquid surface of the solution before powering on, so that it just touches the liquid surface, allowing The error of the end surface entering the solution is no more than 5mm relative to the liquid surface; then turn on the DC power supply, control the constant voltage of 40V, and start working. It is also possible to adjust the end surface of the graphite paper to work within the range of no more than 5mm above the liquid surface. At this time, the working current density fluctuation range of the relative e...

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Abstract

The invention provides graphene composite foam metal and a preparation method thereof. The preparation method comprises the following steps: the foam metal is soaked in dispersion liquid containing a composite nanomaterial consisting of oxidized graphene quantum dots and graphene; after air remaining in foam metal holes is removed, solvent on the surface of the soaked foam metal is removed; or the foam metal is heated and then soaked in the dispersion liquid, and the solvent on the surface of the soaked foam metal is removed after the soaked foam metal is cooled; and the composite nanomaterial coats the surface of the foam metal to form a graphene layer consisting of the oxidized graphene quantum dots and the graphene to obtain the graphene composite foam metal. The graphene composite foam metal comprises a foam metal substrate, and the graphene layer on the surface of the foam metal substrate; the graphene layer consists of the oxidized graphene quantum dots and the graphene; the size and the performances of the graphene layer are controllable; the interlayer stacking effect of the graphene is obviously inhibited; and the bonding force between the graphene layer and the foam metal substrate is high.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and specifically relates to a graphene composite metal foam and a preparation method thereof. The graphene composite metal foam can be used for electrical conduction, heat conduction, heat dissipation, heat insulation, electromagnetic shielding, noise reduction, shock absorption, and battery electrodes. , filtering and other fields. Background technique [0002] Graphene is currently the thinnest but also the hardest nanomaterial in the world. It is almost completely transparent and only absorbs 2.3% of light; its thermal conductivity is as high as 5300W / m·K, which is higher than that of carbon nanotubes and diamonds. Electron mobility over 15000cm 2 / V·s, much higher than that of carbon nanotubes or silicon crystals, and its resistivity is only 10 -6 Ω·cm, which is lower than copper or silver, and is currently the material with the smallest resistivity in the world. Graphene also...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/14C01B32/194C01B32/198C22C1/08C22C9/00C22C21/00
CPCB05D7/14C22C1/08C22C9/00C22C21/00
Inventor 徐海波周泉竹
Owner 徐海波
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