CN212050551U - Flexible composite layer of graphite alkene - Google Patents
Flexible composite layer of graphite alkene Download PDFInfo
- Publication number
- CN212050551U CN212050551U CN202020131617.8U CN202020131617U CN212050551U CN 212050551 U CN212050551 U CN 212050551U CN 202020131617 U CN202020131617 U CN 202020131617U CN 212050551 U CN212050551 U CN 212050551U
- Authority
- CN
- China
- Prior art keywords
- graphene
- metal substrate
- composite layer
- flexible composite
- substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Carbon And Carbon Compounds (AREA)
- Laminated Bodies (AREA)
Abstract
The application discloses flexible composite bed of graphite alkene. The graphene flexible composite layer sequentially comprises a first graphene thin film layer, a first metal substrate, a non-metal substrate, a second metal substrate and a second graphene thin film layer. The graphene flexible composite layer can be applied to electromagnetic shielding, antistatic, electric conduction and heat conduction products, and can be used as a semi-finished product for preparing a graphene film to be transferred to obtain the graphene film.
Description
Technical Field
The present disclosure relates to graphene products, and in particular, to a flexible composite layer of graphene.
Background
The existing graphene roll-to-roll continuous growth process adopts a single-layer metal substrate to carry out continuous growth of graphene, and mainly comprises the following three steps: firstly, a metal substrate roll (such as copper foil) is placed in a feeding cabin, and the metal substrate is pulled to pass through a growth chamber and is connected with a winding roller of a collection cabin; then closing the reaction chamber, vacuumizing to a certain pressure, introducing inert gas (such as argon), starting a temperature rise program, and raising the temperature to a target temperature; secondly, entering a constant temperature stage, introducing carbon source gas (such as methane), starting a motor to enable a winding roller to rotate, enabling the metal substrate to continuously run through a growth chamber and then be wound to the winding roller, and keeping the temperature for a certain time; and thirdly, after the growth is finished, closing the carbon source gas, continuously introducing inert gas to cool the equipment to room temperature, and taking out the coiled material. And the rolling material is a graphene/metal substrate roll with graphene growing on the surface.
Graphene/metal substrates prepared in the prior art are metal substrates with graphene grown on both sides, and the graphene on the metal substrate often needs to be transferred to a suitable base surface when applied. Fig. 1 shows a currently common graphene transfer process:
attaching one surface of a graphene/metal substrate to a base, and removing graphene and other pollutants on the other surface; the metal substrate is then completely etched, thereby transferring the graphene to the base. As can be clearly seen from the schematic diagram, graphene on only one side of the graphene-metal composite material can be effectively transferred, and the other side is discarded in the transfer process.
SUMMERY OF THE UTILITY MODEL
The technical problem that this disclosure will solve is, current graphite alkene/metal substrate can only effectively shift partial graphite alkene, and production efficiency is lower, and this disclosure provides a novel flexible composite bed of graphite alkene, can effectively improve graphite alkene transfer volume, still can be used to in electromagnetic shield, antistatic, electrically conductive, the heat conduction product.
The method comprises the steps that a first metal substrate-nonmetal substrate-second metal substrate flexible composite layer (composite layer substrate for short) which is prepared by clamping a nonmetal substrate between two metal substrates is used as an initial substrate, and graphene only grows on an exposed metal surface of the composite layer substrate and does not grow on a joint surface of the metal substrate and the nonmetal substrate when the composite layer substrate passes through a growth chamber, so that the graphene flexible composite layer is obtained. After the growth is finished, two metal substrates in the graphene flexible composite layer are separated, and the graphene on the metal substrates can be transferred and applied respectively. The inventor adopts the composite layer substrate to carry out roll-to-roll continuous growth, so that the graphene obtained by growing the two surfaces of the graphene flexible composite layer is effectively utilized.
Specifically, the present disclosure proposes the following technical solutions:
some embodiments of the present disclosure provide a graphene flexible composite layer including, in order, a first graphene thin film layer, a first metal substrate, a non-metal substrate, a second metal substrate, and a second graphene thin film layer.
In some embodiments of the present disclosure, the non-metal substrate has a thickness of 30 to 200 μm.
In some embodiments of the present disclosure, the non-metallic substrate is graphite paper.
In some embodiments of the present disclosure, the graphite paper is comprised of flake graphite.
In some embodiments of the present disclosure, the first metal substrate has a thickness of 5 to 105 μm.
Some embodiments of the present disclosure provide that the first metal substrate has a thickness of 20 to 30 μm.
In some embodiments of the present disclosure, the second metal substrate has a thickness of 5 to 105 μm.
In some embodiments of the present disclosure, the second metal substrate has a thickness of 20 to 30 μm.
In some embodiments of the present disclosure, the first graphene thin film layer and/or the second graphene thin film layer is a single layer of carbon atom graphene or a double layer of carbon atom graphene.
In some embodiments of the present disclosure, the surfaces of the first metal substrate, the non-metal substrate, and the second metal substrate are flat and smooth.
The beneficial effects of this disclosure include:
1. according to the method, the graphene flexible composite layer is prepared by adopting the composite layer substrate, the transferable graphene area is doubled, and the production efficiency of applicable graphene is greatly improved.
2. When the high-purity graphite paper is used as a substrate between two metal substrates, the graphite paper has smooth surface and high stability, can be stable for a long time in a non-oxidation medium, is high in temperature resistance, and ensures effective isolation of the two metal substrates and smooth surface of the metal substrate in the graphene growth process, so that a graphene film layer with good quality is obtained, meanwhile, the graphite paper is not polluted, and the pollution of the grown graphene can be avoided.
3. The graphene flexible composite layer can be applied to electromagnetic shielding, antistatic, electric conduction and heat conduction products
Drawings
FIG. 1 is a flow chart of graphene transfer in the prior art;
FIG. 2 is a schematic view of a winding cradle that may be used in the preparation of a composite layered substrate;
FIG. 3 is a schematic view of a nickel foil-graphite paper-copper foil composite layer prepared in example 2;
FIG. 4 is a flexible composite layer of graphene prepared in example 2;
in the figure: the method comprises the following steps of 1-a graphene film, 2-a metal substrate, 3-a transfer substrate, 4-graphite paper, 5-a nickel foil, 6-a copper foil, 7-a first graphene film layer and 8-a second graphene film layer.
Detailed Description
The technical scheme of the disclosure is clearly and completely described in the following with reference to the accompanying drawings. Obviously, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts based on the specific embodiments in the present disclosure belong to the protection scope of the present disclosure.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure.
In the description herein, the term "graphite" unless otherwise expressly specified or limitedAn alkene "is a compound consisting of carbon atoms in sp2The hybrid tracks form a hexagonal honeycomb lattice two-dimensional carbon nanomaterial. Graphene is a two-dimensional carbon nanomaterial formed by stacking single-layer carbon atoms, the thickness of the graphene is 0.335nm, the graphene is the thinnest material found in the world at present, and the graphene has excellent physical properties such as high strength, high heat conductivity and high transparency and has an important application prospect. Graphene is generally divided into two forms, graphene thin films and graphene powders.
The term "CVD": chemical Vapor Deposition refers to a method in which Chemical gases or vapors react on the surface of a substrate to synthesize a coating or a nanomaterial. The CVD method for preparing graphene is to prepare a graphene film by vapor deposition on the surface of transition metal in a high-temperature CVD furnace by using carbon-containing organic gas. The method is the most effective method for producing high-quality and large-size graphene films at present.
The term "graphite paper" refers to flexible thin sheets made from graphite, typically high carbon graphite flakes, which are chemically treated and high temperature expansion rolled.
The utility model provides a flexible composite bed of graphite alkene, flexible composite bed of graphite alkene includes first graphite alkene thin layer, first metal substrate, non-metallic substrate, second metal substrate and second graphite alkene thin layer in proper order. A flexible non-metal substrate is clamped between the two layers of flexible metal substrates, and graphene films grow on the outer surfaces of the two layers of metal substrates.
In some embodiments of the present disclosure, the non-metallic substrate is graphite paper with a thickness of 30-200 μm, such as 30 μm, 50 μm, 100 μm, 150 μm, and the like.
In some embodiments, the graphite paper has a carbon content of 99.90 wt.% or more, such as 99.90 to 99.99 wt.%. The higher the carbon content in the graphite paper is, the better the high-temperature stability is, and the better the quality of the prepared graphene is.
In some embodiments, the first metal substrate can be a copper foil or a nickel foil, the second metal substrate can be a copper foil or a nickel foil, and the first metal substrate and the second metal substrate can be made of the same material or different materials. Optionally, the copper foil or the nickel foil is an annealed copper foil or an annealed nickel foil, and the surface of the annealed copper foil or the annealed nickel foil is smoother, so that the graphene film with high flatness can be generated.
In some embodiments of the present disclosure, the first graphene thin film layer and/or the second graphene thin film layer is a single layer of carbon atom graphene or a double layer of carbon atom graphene, and the single layer of carbon atom graphene generally has better quality than the double layer of carbon atom graphene.
The graphene flexible composite layer provided by the disclosure can be used for electromagnetic shielding and antistatic, for example, in a notebook computer or a mobile phone, so as to avoid electromagnetic signal interference; the graphene flexible composite layer has excellent electrical property and mechanical property, and can be used as a conductor material in equipment such as motors, transformers, converters, cables and the like; each layer of material in the graphene flexible composite layer has beneficial thermal conductivity and mechanical property, and is used as efficient composite flexible thermal conductivity for various heat conduction and heat dissipation products.
Also provided in some embodiments of the present disclosure are methods of making a flexible composite layer of graphene or graphene, optionally using a graphene roll-to-roll growth apparatus, typically having a feed compartment, a take-up compartment, and a growth chamber located between the feed compartment and the take-up compartment, the growth chamber having a graphene growth zone therein, the temperature of which can be raised to the growth temperature of the graphene. Placing a first metal substrate-nonmetal substrate-second metal substrate flexible composite layer (composite layer substrate for short) on a driven roller in a feeding cabin, and drawing the composite layer substrate into a receiving cabin to be wound on a driving roller (winding roller); vacuumizing the growth chamber to below 1Pa, and then introducing inert gas into the growth chamber; raising the temperature of the graphene growth area to the growth temperature of the graphene; entering a constant temperature stage, and introducing carbon source gas into the growth chamber; and starting the driving roller to drive the composite layer substrate to operate, and depositing graphene on the composite layer substrate passing through the graphene growth area. And obtaining the graphene flexible composite layer after the growth of the graphene is completed.
In some embodiments, the non-metal substrate is graphite paper, the graphite paper has a smooth surface and good flexibility, and can be attached to the metal substrate to keep the surface of the metal substrate smooth, so that a perfect plane for graphene growth is provided; in addition, the graphite paper basically does not have slag falling in the winding process, and a growth chamber is not polluted or the growth of graphene is not influenced.
The present disclosure also provides a preparation method of the composite layer substrate, wherein a winding support is adopted to prepare the composite layer substrate, as shown in fig. 2, a three-roll support at one end of the winding support is provided with three driving rolls, an upper driving roll, a middle driving roll and a lower driving roll are sequentially arranged, a single-roll support at the other end of the winding support is provided with one driving roll, a first metal substrate and a second metal substrate are respectively placed on the upper driving roll and the lower driving roll, a non-metal substrate is placed on the middle driving roll, the substrates on the lower driving roll, the middle driving roll and the upper driving roll are sequentially pulled to the driving roll on the single-roll support, the driving roll on the single-roll support is started to rotate, and the first metal substrate, the non-metal substrate and the second metal substrate are attached and wound into a roll, so that.
Also provided in some embodiments of the present disclosure are methods of separating a graphene-metal substrate and graphite paper in a graphene flexible composite layer roll: the graphene flexible composite layer is coiled on a driving roller on a single-roller support of a coiling support, an upper graphene/metal substrate and a lower graphene/metal substrate and graphite paper are separated (binding surfaces of the metal substrate and the graphite paper can be easily separated by using tools such as tweezers), the graphene flexible composite layer and the graphite paper are respectively pulled to the driving rollers of the three-roller support, the upper driving roller, the middle driving roller and the lower driving roller are started to rotate, the upper driving roller and the lower driving roller are coiled to obtain a graphene/metal substrate coil, the middle driving roller is coiled to obtain a graphite paper roll, and the graphite paper roll can be repeatedly used.
Embodiments of the present disclosure are further illustrated by the following specific examples.
Example 1
By adopting the winding bracket in the figure 2, two copper foil rolls with the purity of 99.99 percent and the thickness of 25 mu m are respectively arranged on the upper driving roll and the lower driving roll on the left side, graphite paper with the purity of 99.99 percent and the thickness of 50 mu m is placed on the middle driving roll and is drawn to the driving roll on the right side, and the driving roll on the right side is started to form a copper foil-graphite paper-copper foil composite layer substrate roll. And (3) loading the copper foil-graphite paper-copper foil composite layer substrate roll onto a driven roller of a feeding cabin of roll-to-roll continuous growth equipment, drawing the composite layer substrate to be connected with a winding shaft of a receiving cabin through a graphene growth chamber (a quartz tube), and closing the cabin door. Starting a vacuum unit, pumping the air pressure in the graphene growth chamber to be below 1Pa, introducing argon and hydrogen, starting a heating furnace, and heating to 960 ℃. And (2) entering a constant temperature stage, introducing methane, setting the flow of introduced gas to be 60sccm, the flow of hydrogen to be 20sccm, the flow of argon to be 150sccm, the gas pressure of the growth chamber to be 64.1Pa, starting the rotating motor, setting the running speed of the composite layer substrate to be 1.25cm/min, starting the driving roller in the material receiving cabin to rotate, enabling the composite layer substrate to pass through the growth chamber from the material inlet cabin, and enabling graphene to grow on two outer surfaces of the composite layer substrate. And after the growth of the whole roll of the composite layer substrate is finished, closing the motor, stopping introducing methane and hydrogen, closing the heating furnace, cooling the growth chamber to room temperature, and stopping introducing argon. And closing the vacuum unit, opening the discharge cabin door, and unloading the grown graphene flexible composite layer coil to obtain the graphene flexible composite layer. The graphene flexible composite layer sequentially comprises a graphene thin film layer, a copper foil, graphite paper, a copper foil and a graphene thin film layer. Through detection, the graphene film layers on the two sides of the graphene flexible composite layer are all single-layer carbon atom graphene.
Example 2
Adopting the winding bracket in the figure 2, a nickel foil roll with the purity of 99.99 percent and the thickness of 25 mu m and a copper foil roll with the purity of 99.99 percent and the thickness of 25 mu m are respectively arranged on the upper driving roll and the lower driving roll on the left, graphite paper with the purity of 99.99 percent and the thickness of 50 mu m is placed on the middle driving roll and is drawn to the driving roll on the right, and the driving roll on the right is started to form a nickel foil-graphite paper-copper foil composite layer substrate roll. The nickel foil-graphite paper-copper foil composite layer substrate comprises a nickel foil 5, graphite paper 4 and a copper foil 6 in sequence as shown in fig. 3.
And (3) loading the nickel foil-graphite paper-copper foil composite layer substrate roll on a driven roller of a feeding cabin of roll-to-roll continuous growth equipment, drawing the composite layer substrate to be connected with a winding shaft of a receiving cabin through a graphene growth chamber (a quartz tube), and closing the cabin door. Starting a vacuum unit, pumping the air pressure in the graphene growth chamber to be below 1Pa, introducing hydrogen, starting a heating furnace and a plasma generator, setting the power of the plasma generator to be 100W, and heating to 600 ℃. And (3) entering a constant temperature stage, introducing methane, setting the flow of introduced gas to be 45sccm, setting the flow of hydrogen to be 15sccm, setting the gas pressure of the growth chamber to be 33.4Pa, starting a rotating motor, setting the running speed of the composite layer substrate to be 5cm/min, starting a driving roller in the material receiving cabin to rotate, enabling the composite layer substrate to pass through the growth chamber from the material inlet cabin, and enabling graphene to grow on two outer surfaces of the composite layer substrate. And after the growth of the whole roll of the composite layer substrate is finished, closing the motor, stopping introducing methane and hydrogen, closing the heating furnace, cooling the growth chamber to room temperature, and stopping introducing argon. And closing the vacuum unit, opening the discharge cabin door, and unloading the grown graphene flexible composite layer coil to obtain the graphene flexible composite layer. The graphene flexible composite layer sequentially comprises a first graphene film layer 7, a nickel foil 5, graphite paper 4, a copper foil 6 and a second graphene film layer 8, as shown in fig. 4.
Claims (8)
1. The graphene flexible composite layer is characterized by sequentially comprising a first graphene thin film layer, a first metal substrate, a non-metal substrate, a second metal substrate and a second graphene thin film layer, wherein the non-metal substrate is graphite paper, and the graphite paper is composed of flaky graphite.
2. The graphene flexible composite layer according to claim 1, wherein the thickness of the non-metal substrate is 30 to 200 μm.
3. The graphene flexible composite layer according to claim 1, wherein the first metal substrate has a thickness of 5 to 105 μm.
4. The graphene flexible composite layer according to claim 3, wherein the first metal substrate has a thickness of 20 to 30 μm.
5. The graphene flexible composite layer according to claim 1, wherein the second metal substrate has a thickness of 5 to 105 μm.
6. The graphene flexible composite layer according to claim 5, wherein the second metal substrate has a thickness of 20 to 30 μm.
7. The graphene flexible composite layer according to claim 1, wherein the first graphene thin film layer and/or the second graphene thin film layer is a single-layer carbon atom graphene or a double-layer carbon atom graphene.
8. The flexible composite layer of graphene according to any one of claims 1 to 7, wherein the surfaces of the first metal substrate, the non-metal substrate, and the second metal substrate are flat and smooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020131617.8U CN212050551U (en) | 2020-01-20 | 2020-01-20 | Flexible composite layer of graphite alkene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020131617.8U CN212050551U (en) | 2020-01-20 | 2020-01-20 | Flexible composite layer of graphite alkene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212050551U true CN212050551U (en) | 2020-12-01 |
Family
ID=73538875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020131617.8U Active CN212050551U (en) | 2020-01-20 | 2020-01-20 | Flexible composite layer of graphite alkene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212050551U (en) |
-
2020
- 2020-01-20 CN CN202020131617.8U patent/CN212050551U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2838557C (en) | Energy storage media for ultracapacitors | |
| CN112374492B (en) | High-electric-conductivity high-heat-conductivity coiled material graphene film and preparation method thereof | |
| CN103794298B (en) | A kind of preparation method of Graphene wire | |
| Han et al. | Poly (ethylene co-vinyl acetate)-assisted one-step transfer of ultra-large graphene | |
| CN104659371B (en) | High organic compatibility carbon-coated aluminum foils of a kind of high temperature resistant low resistance and preparation method thereof | |
| CN111188086B (en) | Preparation method of ultrahigh-conductivity multilayer single crystal laminated copper material and copper material | |
| CN111145960A (en) | High-strength high-conductivity copper-based composite material and preparation method thereof | |
| CN109824042B (en) | Method for regulating and controlling electrochemical stripping of graphene | |
| CN104477892A (en) | Preparation method of flake graphene and flake graphene device prepared by same | |
| CN112746262A (en) | Graphene composite metal foil and double-sided growth method and device thereof | |
| CN112875680B (en) | Preparation method of flaky Fe-based alloy catalytic growth carbon nanotube array | |
| CN103407988A (en) | Method for preparing graphene film at low temperature | |
| CN105883779A (en) | Method for large-scale CVD growth of graphene | |
| CN212050551U (en) | Flexible composite layer of graphite alkene | |
| CN104828808B (en) | A kind of preparation method of graphene film | |
| CN111874893A (en) | Graphene flexible composite layer and preparation method and application thereof | |
| CN111058000B (en) | High-speed volume to volume vacuum lithium film apparatus for producing of tertiary evaporation | |
| CN110699666A (en) | Preparation method of graphene copper laminated composite film material | |
| CN114068871B (en) | Double-sided ultrathin lithium layer composite belt and preparation method thereof | |
| CN217459595U (en) | Device for preparing high-conductivity graphene metal composite material with assistance of plasma | |
| CN116469602A (en) | High-conductivity copper-based graphene composite material and preparation device thereof | |
| CN111063472B (en) | Novel graphene reinforced aluminum wire and preparation method thereof | |
| CN111058017B (en) | Graphene metal composite wire and low-temperature continuous preparation method thereof | |
| CN112740337B (en) | Conductive element | |
| CN114959697A (en) | Preparation method of graphene/copper composite material combining physical vapor deposition and chemical vapor deposition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |