CN117253676A - Graphene film manufacturing method - Google Patents
Graphene film manufacturing method Download PDFInfo
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- CN117253676A CN117253676A CN202311273884.3A CN202311273884A CN117253676A CN 117253676 A CN117253676 A CN 117253676A CN 202311273884 A CN202311273884 A CN 202311273884A CN 117253676 A CN117253676 A CN 117253676A
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- graphene
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- copper base
- graphene film
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 265
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 240
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 82
- 229910052802 copper Inorganic materials 0.000 claims abstract description 80
- 239000010949 copper Substances 0.000 claims abstract description 80
- 239000000843 powder Substances 0.000 claims abstract description 42
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 33
- 239000010439 graphite Substances 0.000 claims abstract description 33
- 238000005096 rolling process Methods 0.000 claims abstract description 21
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 239000011159 matrix material Substances 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 38
- 230000008569 process Effects 0.000 claims description 19
- 239000011261 inert gas Substances 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 abstract description 6
- 239000010408 film Substances 0.000 description 55
- -1 graphite alkene Chemical class 0.000 description 8
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0026—Apparatus for manufacturing conducting or semi-conducting layers, e.g. deposition of metal
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention relates to the field of film manufacturing, in particular to a graphene film manufacturing method, which comprises the following steps: s1, uniformly scattering graphene powder on a substrate, and covering a copper base above the graphene powder, wherein a plurality of through holes are formed in the copper base; rolling the copper matrix by adopting a rolling mode, rolling the graphene powder into graphene sheets, and pressing the graphene sheets and the copper matrix together; s2, removing the graphene sheets, and taking the graphene sheets off the substrate; s3, winding the graphene sheets into graphene rolls, placing the graphene rolls in a graphite furnace, performing high-temperature treatment, and cooling after the high-temperature treatment to obtain a graphene film; and S4, taking the graphene coil out of the graphite furnace, and taking the copper base off the graphene film. According to the scheme, the non-smooth graphene film can be prepared, the preparation quality of the graphene film is improved, and the preparation efficiency is improved.
Description
Technical Field
The invention relates to the field of film manufacturing, in particular to a graphene film manufacturing method.
Background
Graphene has good conductivity and mechanical properties, is considered as an ideal material for manufacturing transparent conductive films, and is applied to various fields. The graphene film may be classified into a smooth graphene film and a non-smooth graphene film according to whether the surface of the graphene film is smooth. The smooth graphene film means that two side surfaces of the graphene film are smooth. The non-smooth graphene film refers to a graphene film with uneven side surfaces (or two side surfaces), and has more advantages by enabling the surface of the graphene film to be uneven: for example, the contact area between the graphene film and the substrate of the electronic device can be enhanced, the attachment stability is improved, and the graphene film can be more tightly attached to the substrate of the electronic device; for example, the specific surface area of the graphene film can be increased, so that the reaction speed of graphene in chemical reaction and the efficiency of the graphene in catalysis or energy storage application are improved; meanwhile, the rugged surface can also enhance the mechanical strength of the material, etc.
The smooth graphene film can be prepared by the following method, and the preparation method specifically comprises the following steps: s1, scattering graphene powder on a substrate, and then rolling by adopting a compression roller to roll the graphene powder into a graphene sheet with a smooth surface; s2, winding the pressed graphene sheets into a roll, and placing the roll in a graphite furnace, and performing high-temperature treatment under the protection of inert gas; and S3, cooling after the high-temperature treatment is finished, and obtaining the graphene film.
The smooth graphene film prepared by the method can effectively perfect the graphene film crystal structure, improve the electric conduction and heat conduction properties, reduce the sheet resistance, and is simple to prepare and easy to flow. However, according to the method, the graphene powder is rolled and flattened, so that a non-smooth graphene film cannot be prepared.
In addition, the preparation of the smooth graphene film by the method has the following defects:
1. in the process of rolling the graphene powder by the pressing roller, the graphene powder is easy to adhere to the surface of the pressing roller, and because the graphene powder has the defect of easy agglomeration, the graphene powder is easy to gather together and is not easy to fall off after being adhered to the surface of the pressing roller, so that the graphene powder on the pressing roller is more accumulated, the graphene powder cannot be rolled normally at last, the thickness of a graphene sheet is also influenced, and the film forming quality of a graphene film is influenced.
2. The graphene sheets are coiled in the graphite furnace, the graphene sheets are wound into coils, the space occupied by the graphene sheets in the furnace can be saved, but the graphene sheets are coiled into coils, the graphene sheets positioned in the inner layer of the coils and the graphene sheets positioned in the outer layer of the coils are heated at different speeds, the graphene sheets positioned in the outer layer of the coils are heated firstly, and the graphene sheets positioned in the inner layer of the coils are heated later, so that the internal components of the heated graphene sheets are not changed uniformly, the quality of the graphene film is uneven, and the quality of the graphene film is to be further improved. Meanwhile, the graphene sheets are wound into a roll, and the graphene sheets on the inner layer are not easy to be heated, so that the effect of high-temperature treatment is guaranteed, the heat preservation and heating time is long, and the manufacturing efficiency is not improved.
Disclosure of Invention
The invention aims to provide a graphene film manufacturing method which is used for preparing a non-smooth graphene film in a rolling mode.
In order to achieve the above purpose, the invention adopts the following technical scheme: a method for manufacturing a graphene film comprises the following steps:
s1, uniformly scattering graphene powder on a substrate, and covering a copper base above the graphene powder, wherein a plurality of through holes are formed in the copper base; rolling the copper matrix by adopting a rolling mode, rolling the graphene powder into graphene sheets, and pressing the graphene sheets and the copper matrix together;
s2, removing the graphene sheets, and taking the graphene sheets off the substrate;
s3, winding the graphene sheets into graphene rolls, placing the graphene rolls in a graphite furnace, performing high-temperature treatment, and cooling after the high-temperature treatment to obtain a graphene film;
and S4, taking the graphene coil out of the graphite furnace, taking the copper base off the graphene film, and separating the copper base from the graphene film.
The principle and the advantages of the scheme are as follows: this scheme covers copper base on graphene powder, consequently at the in-process of carrying out the roll-in to copper base, copper base pushes down graphene powder to press into graphene sheet. Meanwhile, as the copper base is provided with the plurality of through holes, when the copper base presses down the graphene powder, part of the graphene powder can enter the through holes of the copper base, so that convex points (positions in the through holes) are formed on the upper surface of the graphene sheet, and the upper surface of the graphene sheet is uneven.
This scheme is carrying out roll-in-process to the graphene sheet, and copper base is located between compression roller and the graphene sheet, and the compression roller is not direct with graphene powder contact, compression roller and copper base contact, and the compression roller is through extruding the copper base to realized the extrusion to graphene powder, copper base has played the isolation effect of compression roller and graphene powder like this, and graphene powder can not glue on the compression roller, has avoided the waste of graphene powder, and is little to graphene sheet's thickness influence.
In addition, in the high-temperature treatment process, the copper base is positioned on the graphene sheet, and the copper base has the function of metal catalysis, so that the conversion from the graphene sheet to the graphene film can be accelerated, the reaction efficiency is improved, the reaction time is saved, and the preparation efficiency of the graphene film is improved.
After the graphene film is prepared, the copper base is taken down from the graphene film, and the copper base can be recovered and reused after being taken down. By adopting the scheme, the non-smooth graphene film is prepared in a rolling mode, the preparation is simple, the process is easy, meanwhile, the graphene film crystal structure can be effectively perfected, the electric conduction and heat conduction performance is improved, and the sheet resistance is reduced.
Preferably, in S2, negative pressure is applied to one side of the copper base during the graphene sheet removal process. Therefore, through holes on the copper base are utilized, negative pressure is applied to one side of the copper base in the process of separating the graphene sheets from the base, and the negative pressure acts on the graphene sheets through the through holes, so that suction is applied to the graphene sheets, the graphene sheets have a tendency and force of being attached to the copper base, and the graphene sheets and the copper base are not easy to separate.
Preferably, in S4, positive pressure is applied to one side of the copper matrix during removal of the copper matrix from the graphene film. Utilize the through-hole on the copper base, in the separation process of graphene sheet and copper base, apply the malleation in one side of copper base, the malleation passes through the through-hole and acts on the graphene sheet to have the blowing force to the graphene sheet, make the graphene sheet have to keeping away from trend and the power of copper base direction, graphene sheet and copper base are easy to separate.
Preferably, as an improvement, the negative pressure is realized by adopting an air suction mode. Therefore, negative pressure is formed on one side of the copper base by adopting an air draft mode, the implementation mode is simple and feasible, and the arrangement is convenient.
Preferably, as a modification, the positive pressure is achieved by blowing. Therefore, positive pressure is formed on one side of the copper base by adopting a blowing mode, the implementation mode is simple and feasible, and the setting is convenient.
Preferably, in S3, a rotating roller set is disposed in the graphite furnace, the rotating roller set includes a first rotating roller and a second rotating roller, the graphene roll is disposed on the first rotating roller, and the free end of the graphene sheet is disposed on the second rotating roller; in the high-temperature treatment process, the first rotating roller and the second rotating roller continuously rotate in a reciprocating manner, and the graphene sheets are transmitted back and forth on the first rotating roller and the second rotating roller.
According to the scheme, the graphene roll is placed in the graphite furnace, the first rotating roller and the second rotating roller continuously and reciprocally rotate in the high-temperature treatment process, the graphene sheets are transmitted back and forth on the first rotating roller and the second rotating roller, so that the whole graphene sheets are in a dynamic process in the graphite furnace instead of a static process, the graphene sheets on the graphene roll are continuously unfolded, rolled and redeployed, the graphene sheets can be comprehensively contacted with hot air in the graphite furnace in the unfolding process, the contact area of the graphene sheets and the hot air is increased, the graphene sheets are heated more uniformly, the prepared film is good in quality uniformity, and meanwhile the heated efficiency is also high.
In addition, in the prior art, the graphene sheets are placed in a graphite furnace in a coiled manner, rather than being unfolded in the graphite furnace to enable the graphene sheets to move back and forth, because the graphene sheets are not moved, the graphene sheets can be prevented from being damaged in the moving process, and even and sufficient heating of the graphene sheets cannot be guaranteed. In this scheme, the outside of graphite alkene piece is equipped with copper base, and copper base supports the protection to the surface of graphite alkene piece, also has certain support, enhancement effect to the structure of graphite alkene piece, so the graphite alkene piece is difficult for taking place to damage broken in the back and forth reciprocating movement in-process in graphite furnace, can not exert an influence to the graphite alkene film, so can be through the graphite alkene piece reciprocating movement mode with the graphite alkene piece expansion of lapping, make it be heated fully, evenly, improved the quality of graphite alkene film.
Preferably, as a modification, the inert gas is nitrogen or argon, and the flow rate of the inert gas is 200-10000ml/min.
Preferably, as a modification, the high temperature treatment conditions are: the temperature rising rate is 30-40 ℃/min, the temperature of high-temperature treatment is 800-1000 ℃, and the heat preservation time is 30-60min.
Preferably, as a modification, the moving speed of the graphene sheet transferred back and forth on the first rotating roller and the second rotating roller is 0.2-1m/s.
Preferably, as an improvement, the first rotating roller and the second rotating roller are detachably connected with a rotating ring, and the graphene sheets are wound on the rotating ring. Thus, after the graphene sheet is wound on the rotating ring outside the graphite furnace, the rotating ring is mounted on the first rotating roller and the second rotating roller. After the graphene film is prepared, the rotating ring is taken down from the first rotating roller and the second rotating roller, so that the graphene film is taken down, and the graphene film is conveniently loaded into and taken out from the graphite furnace.
Drawings
Fig. 1 is a schematic view of a rolling device.
Fig. 2 is a schematic diagram of the graphene-free sheet in S2.
Fig. 3 is a schematic diagram of separation of graphene thin film and copper-based in S4.
Fig. 4 is a schematic diagram of graphene sheets in a graphite furnace.
Fig. 5 is a schematic structural view of the first rotating ring (second rotating ring).
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: the device comprises a rolling platform 1, a press roll 2, a guide roll 3, a powder spraying nozzle 4, graphene powder 5, a copper base 6, a substrate 7, a graphite furnace 12, a first rotating ring 13, a first rotating roller 14, a second rotating roller 15, a second rotating ring 16, a T-shaped block 17, a lug groove 18, a graphene sheet 19, a through hole 20, an exhaust fan 21, a blower 22 and a graphene film 23.
An example is substantially as shown in figures 1 to 5 of the accompanying drawings: a method for manufacturing a graphene film comprises the steps of S1-S4:
s1, rolling the graphene powder 5 on a rolling device. Referring to fig. 1, the rolling device includes a rolling platform 1, a plurality of press rollers 2 above the rolling platform 1, and a guide roller 3 and a powder spraying nozzle 4 above the rolling platform 1, wherein the guide roller 3 and the powder spraying nozzle 4 are both located on the left side of the left side press roller 2.
The substrate 7 is placed on the roll platform 1, the substrate 7 can be aluminum foil, paper base, plastic base film or steel belt substrate, and the like, the substrate 7 is uniformly conveyed rightward on the roll platform 1, and the conveying of the substrate 7 is realized through the rotation of a conveying roller.
After the graphene powder 5 is uniformly scattered on the matrix 7 through the powder spraying nozzle 4, in the rightward conveying process of the matrix 7, then the copper matrix 6 is covered above the graphene powder 5, the copper matrix 6 is attached to the upper side of the graphene powder 5 through the guide roller 3, and the copper matrix 6 covers the graphene powder 5 and is conveyed rightward along with the matrix 7. The copper base 6 in this embodiment is a copper foil or a high temperature resistant copper foil, and the thickness of the copper base 6 is 0.006mm to 0.2mm. The copper base 6 is provided with a plurality of vertical through holes 20, the through holes 20 can be formed in a laser drilling mode, and the diameter of the through holes 20 is 0.01mm-0.1mm.
The copper base 6 and the matrix 7 encase the graphene powder 5 and convey the graphene powder to the right, and sequentially pass through the plurality of press rollers 2, the press rollers 2 press the copper base 6, so that the graphene powder 5 is rolled, the graphene powder 5 is rolled into graphene sheets 19, and after the graphene sheets 19 are rolled, the copper base 6 and the graphene sheets 19 are tightly adhered together under the action of extrusion force.
As shown in fig. 2, when the copper base 6 is pressed down, a part of the graphene powder 5 enters the through holes 20 of the copper base 6 when the copper base 6 is pressed down, so that the upper surface of the finally pressed graphene sheet 19 forms bumps (the bumps are located in the through holes 20), and the upper surface of the graphene sheet 19 is uneven.
S2, removing the graphene sheets 19, and removing the graphene sheets 19 from the substrate 7, for example, tearing the graphene sheets 19 from the substrate 7 by an external force, so that the graphene sheets 19 and the substrate 7 are separated. In the process of separating the graphene sheets 19, in order to enable the graphene sheets 19 to be in close contact with the copper base 6, separation of the graphene sheets 19 and the copper base 6 is avoided, an exhaust fan 21 is applied to one side of the copper base 6 (a plurality of exhaust fans 21 can be arranged, or only the separation positions of the graphene sheets 19 and the matrix 7 are arranged), the exhaust fan 21 sucks air to generate suction force, so that negative pressure F1 is generated on one side of the copper base 6, the negative pressure acts on the graphene sheets 19 through the through holes 20, and accordingly the graphene sheets 19 are provided with upward suction force, the graphene sheets 19 have a trend and force of being attached to the copper base 6, and the graphene sheets 19 and the copper base 6 are not easy to separate, so that the copper base 6 is stably located on the graphene sheets 19.
And S3, winding the graphene sheets 19 into graphene rolls, placing the graphene rolls in a graphite furnace 12, performing high-temperature treatment, and cooling the graphene rolls after the high-temperature treatment to obtain the graphene film 23.
In this embodiment, after the graphene sheet 19 is separated from the substrate 7, the graphene sheet 19 is wound on the first rotating ring 13 to form a roll shape, then the free end of the graphene sheet 19 is clamped on the surface of the second rotating ring 16, as shown in fig. 5, the clamping manner is that a T-shaped groove is formed on the circumferential outer wall of the second rotating ring 16, a T-shaped block 17 is inserted into the T-shaped groove, the free end of the graphene sheet 19 is placed into the T-shaped groove, the T-shaped block 17 is inserted into the T-shaped groove, and the T-shaped block 17 presses the graphene sheet 19 into the T-shaped groove, so that the connection between the free end of the graphene sheet 19 and the surface of the second rotating ring 16 is realized. The connection between the end of the innermost graphene sheet 19 of the graphene roll on the first rotating ring 13 and the first rotating ring 13 is the same as the connection between the free end of the graphene sheet 19 and the second rotating ring 16. In this way, the graphene sheets connect the first rotating ring 13 and the second rotating ring 16.
As shown in connection with fig. 4, the rolled graphene sheet 19 is placed in a graphite oven 12. The graphite furnace 12 is provided with a plurality of groups of rotating roller groups, and the plurality of groups of rotating rollers are sequentially arranged from top to bottom, so that a plurality of graphene rolls can be simultaneously subjected to high-temperature treatment. Each set of rotating roller sets comprises a first rotating roller 14 and a second rotating roller 15, the first rotating roller 14 and the second rotating roller 15 are rotatably connected to the graphite furnace 12, and a motor for driving the first rotating roller 14 and the second rotating roller 15 is arranged on the outer side of the graphite furnace 12.
The graphene roll is placed on the first rotating roller 14 in a specific arrangement mode: the surface of the first rotating roller 14 and the surface of the second rotating roller 15 are integrally and fixedly provided with protruding blocks, the inner wall of the first rotating ring 13 is provided with protruding block grooves 18, the first rotating ring 13 is sleeved on the first rotating roller 14, and the protruding blocks are clamped in the protruding block grooves 18, so that graphene rolls are placed on the first rotating roller 14. At the same time, the second rotating ring 16 is also sleeved on the second rotating roller 15, and the convex block on the second rotating roller 15 is clamped in the convex block groove 18 on the inner wall of the second rotating ring 16.
Then, the high temperature treatment is performed under the protection of inert gas, during the high temperature treatment, the first rotating roller 14 and the second rotating roller 15 continuously rotate reciprocally, that is, the first rotating roller 14 and the second rotating roller 15 rotate clockwise first, the first rotating roller 13 and the second rotating roller 16 rotate clockwise, the graphene sheet 19 moves gradually from the first rotating roller 13 to the second rotating roller 16 and winds around the second rotating roller 16, then the first rotating roller 13 and the second rotating roller 16 rotate anticlockwise, the graphene sheet 19 on the second rotating roller 16 is gradually released, and the graphene sheet 19 on the second rotating roller 16 winds gradually around the first rotating roller 13, so that the graphene sheet 19 is transferred back and forth on the first rotating roller 13 of the first rotating roller 14 and the second rotating roller 16 of the second rotating roller 15. In the transfer process of the graphene sheets 19, the graphene sheets 19 are unfolded from the first rotating ring 13 or the second rotating ring 15, and the graphene sheets 19 are heated uniformly and fully. In this embodiment, the moving speed of the graphene sheet 19 transferred back and forth on the first rotating roller 14 and the second rotating roller 15 is 0.2-1m/s, specifically 0.5m/s, and the specific moving speed may be set according to practical situations.
In this embodiment, the inert gas is nitrogen or argon, and the flow rate of the inert gas is 200-10000ml/min, preferably 500-5000 ml/min, and for the specific flow rate, the inert gas may be set according to practical situations. The high temperature treatment conditions are as follows: the temperature rising rate is 30-40 ℃/min, the final high-temperature treatment temperature is 800-1000 ℃, the heat preservation time is 30-60min, and the heat preservation time in the embodiment is 60min.
In the high temperature treatment process of the graphene sheets 19, the copper-based 8 catalyzes the graphene sheets 19 by metal, and meanwhile, the graphene sheets 19 are converted into the graphene film 23 under high temperature induction.
After the high-temperature treatment is finished, cooling is performed in a natural cooling mode.
In this embodiment, the first rotating roller 14, the second rotating roller 15, the first rotating ring 13 and the second rotating ring 16 are made of high temperature resistant materials.
And S4, after cooling, the first rotating ring 13 and the second rotating ring 16 are taken down from the first rotating roller 14 and the second rotating roller 15, and then the copper base 8 on the graphene film 19 is removed, so that the non-smooth graphene film 19 is left.
For the copper base 8, the removal mode can be performed in a tearing mode, in the process of tearing the copper base 8 from the graphene film 19, a blower is applied to one side of the copper base 8, the blower 22 blows air to the copper base 6, so that positive pressure F2 is formed on one side of the copper base 6, air enters the through holes 20 and can act on the graphene film 23, and the graphene film 23 is easier to separate from the copper base 6 under the action of positive pressure.
Of course, the removal of the copper base 6 may be achieved in other ways, for example by etching or electrochemical removal of the copper base 8, for example by ferric chloride solution.
The foregoing is merely exemplary of the present invention, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present invention, and these should also be regarded as the protection scope of the present invention, which does not affect the effect of the implementation of the present invention and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (10)
1. A method for manufacturing a graphene film is characterized by comprising the following steps: the method comprises the following steps:
s1, uniformly scattering graphene powder on a substrate, and covering a copper base above the graphene powder, wherein a plurality of through holes are formed in the copper base; rolling the copper matrix by adopting a rolling mode, rolling the graphene powder into graphene sheets, and pressing the graphene sheets and the copper matrix together;
s2, removing the graphene sheets, and taking the graphene sheets off the substrate;
s3, winding the graphene sheets into graphene rolls, placing the graphene rolls in a graphite furnace, performing high-temperature treatment, and cooling after the high-temperature treatment to obtain a graphene film;
and S4, taking the graphene coil out of the graphite furnace, and taking the copper base off the graphene film.
2. The method for manufacturing a graphene film according to claim 1, wherein: in S2, negative pressure is applied to one side of the copper base in the graphene sheet removal process.
3. The method for manufacturing a graphene film according to claim 2, wherein: in S4, positive pressure is applied to one side of the copper base in the process of removing the copper base from the graphene film.
4. The method for manufacturing a graphene film according to claim 2, wherein: negative pressure is realized by adopting an air draft mode.
5. A method for producing a graphene film according to claim 3, wherein: the positive pressure is realized by adopting a blowing mode.
6. The method for manufacturing a graphene film according to claim 1, wherein: s3, a rotating roller set is arranged in the graphite furnace, the rotating roller set comprises a first rotating roller and a second rotating roller, the graphene roll is arranged on the first rotating roller, and the free end of the graphene sheet is arranged on the second rotating roller; in the high-temperature treatment process, the first rotating roller and the second rotating roller continuously rotate in a reciprocating manner, and the graphene sheets are transmitted back and forth on the first rotating roller and the second rotating roller.
7. The method for manufacturing a graphene film according to claim 1, wherein: the inert gas is nitrogen or argon, and the flow rate of the inert gas is 200-10000ml/min.
8. The method for manufacturing a graphene film according to claim 1, wherein: the high temperature treatment conditions are as follows: the temperature rising rate is 30-40 ℃/min, the temperature of high-temperature treatment is 800-1000 ℃, and the heat preservation time is 30-60min.
9. The method for manufacturing a graphene film according to claim 6, wherein: the moving speed of the graphene sheet which is transmitted back and forth on the first rotating roller and the second rotating roller is 0.2-1m/s.
10. The method for manufacturing a graphene film according to claim 6, wherein: and the first rotating roller and the second rotating roller are detachably connected with a rotating ring, and the graphene sheets are wound on the rotating ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311273884.3A CN117253676A (en) | 2023-09-28 | 2023-09-28 | Graphene film manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311273884.3A CN117253676A (en) | 2023-09-28 | 2023-09-28 | Graphene film manufacturing method |
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| Publication Number | Publication Date |
|---|---|
| CN117253676A true CN117253676A (en) | 2023-12-19 |
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|---|---|---|---|
| CN202311273884.3A Pending CN117253676A (en) | 2023-09-28 | 2023-09-28 | Graphene film manufacturing method |
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| Country | Link |
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| CN (1) | CN117253676A (en) |
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2023
- 2023-09-28 CN CN202311273884.3A patent/CN117253676A/en active Pending
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