CN117623288A - Preparation method of reel-to-reel graphene cooling fin - Google Patents
Preparation method of reel-to-reel graphene cooling fin Download PDFInfo
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- CN117623288A CN117623288A CN202311530495.4A CN202311530495A CN117623288A CN 117623288 A CN117623288 A CN 117623288A CN 202311530495 A CN202311530495 A CN 202311530495A CN 117623288 A CN117623288 A CN 117623288A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 64
- 238000001816 cooling Methods 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 230000009467 reduction Effects 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000005087 graphitization Methods 0.000 abstract description 4
- 239000010949 copper Substances 0.000 description 49
- 229920001721 polyimide Polymers 0.000 description 12
- 239000004642 Polyimide Substances 0.000 description 11
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 229910021383 artificial graphite Inorganic materials 0.000 description 3
- 239000011889 copper foil Substances 0.000 description 3
- 239000002082 metal nanoparticle Substances 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 235000014612 sandwich biscuits Nutrition 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 238000001237 Raman spectrum Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/194—After-treatment
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Nanotechnology (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Thermal Sciences (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
According to the preparation method of the roll-to-roll graphene cooling fin, GO (graphene oxide) is attached to one side surface of the multi-layer graphene to obtain the GO-covered multi-layer graphene, and after the attachment is completed, two pieces of GO-covered multi-layer graphene are directly opposite to each other with GO surfaces attached, and then the sandwich structure is obtained by rolling; the outer surfaces of two sides of the sandwich structure are respectively externally connected with positive and negative electrodes for discharging, and high-temperature reduction is generated on GO opposite to the positive and negative electrodes to form RGO. The invention discloses a method for instantaneously reducing GO by using capacitor discharge and realizing roll-to-roll preparation of radiating fins, which can greatly reduce energy consumption compared with high-temperature graphitization of a heating furnace commonly used in the prior art, and the energy consumption per unit area is reduced by 50% at least from high temperature rise to 2800-3000 ℃ according to the total energy of single capacitor discharge estimated to be 1 KW.
Description
Technical Field
The invention discloses a preparation method of a roll-to-roll graphene cooling fin, and relates to the technical field of graphene cooling fin preparation.
Background
The main material of the graphite radiating fin is an artificial graphite sheet, and an artificial graphite film and a manufacturing method thereof are disclosed in a reference patent (CN 103080005A), and the artificial graphite film is prepared by high-temperature carbonization and high-temperature graphitization of a polyimide film. Firstly, feeding a Polyimide (PI) film into a thermal resistance graphitizing furnace, and heating and carbonizing the PI film at a heating temperature of 1100-1300 ℃ to enable the PI film to be carbonized to form a PI carbonized piece; then heating and graphitizing the PI carbonized sheet at 2800-3000 ℃ to graphitize the PI carbonized sheet to form a PI graphite radiating sheet; and then cooling the PI graphite radiating fin to room temperature, and then rolling the PI graphite radiating fin to the thickness by a rolling device, so that the PI graphite radiating fin is rolled to form a graphite radiating fin finished product with the thickness of 15-30 mu m. The heat conducting film material has the advantages of designable film thickness, good heat dissipation effect and smaller density, and can well meet the light and thin requirements of electronic products, but the graphitization process needs to consume a great amount of time (heating time is at least 6-10 minutes of cutter die h, cooling time is at least 10 minutes of cutter die h) and energy (experimental furnace energy consumption is at least 50-70 minutes of cutter die kW/h), so that high energy consumption and high cost are brought.
Summary of the invention
The invention aims to provide a preparation method of a roll-to-roll graphene cooling fin. The energy consumption and the cost for preparing the graphene radiating fin are reduced, and the preparation efficiency is improved.
In order to achieve the technical purpose and the technical effect, the invention is realized by the following technical scheme:
the preparation method of the roll-to-roll graphene cooling fin comprises the steps of attaching GO (graphene oxide) to one side surface of the multi-layer graphene to obtain GO-covered multi-layer graphene, and rolling two GO-covered multi-layer graphene sheets after the attachment is completed, wherein the GO surfaces of the GO-covered multi-layer graphene sheets are opposite to each other, and the sandwich structure is obtained;
the outer surfaces of two sides of the sandwich structure are respectively externally connected with positive and negative electrodes for discharging, and high-temperature reduction is generated on GO opposite to the positive and negative electrodes to form RGO.
Further, the multi-layer graphene is formed by covering a graphene layer on the surface of the conductive metal, and the conductive metal external power supply is a capacitor after the sandwich structure is formed by rolling.
Further, the method specifically comprises the following steps:
s1, preparing nGr/Cu of multilayer graphene based on roll-to-roll CVD equipment, attaching GO to obtain a GO/nGr/Cu structure, wherein the conductive metal is Cu;
s2, two prepared GO/nGr/Cu structures are opposite to each other with GO surfaces, and a Cu/nGr/GO/GO/nGr/Cu sandwich structure is obtained by rolling, wherein the center of the sandwich structure is two layers of GO;
s3, respectively externally connecting the anode and the cathode of the capacitor with the two Cu layers, and immediately transferring the electric quantity to GO after discharging the capacitor to generate high temperature to reduce GO to RGO, thereby obtaining the Cu/nGr/RGO/RGO/nGr/Cu structure.
Further, nGr/Cu is formed by adsorbing GO from roll to roll through GO suspension to form coiled Cu/nGr/GO;
the coiled Cu/nGr/GO sandwich bonding forms Cu/nGr/GO/GO/nGr/Cu.
Further, S4: cu was removed by etching to obtain nGr/RGO/RGO/nGr.
Further, the sandwich structure is applied to preparing graphene cooling fins.
The invention further discloses a graphene radiating fin, which is obtained by shearing the multi-layer sandwich structure after extending.
The beneficial effects are that:
1. the sandwich biscuit structure of the graphene powder is sandwiched by the multilayer graphene films, so that the sandwich biscuit structure is more stable, and the problem that the powder is easy to fall off at the edge is solved.
2. When the copper foil substrate is used as a sample pressing buffer layer, the integrity of the graphene film in the sample pressing process can be ensured; and secondly, graphene films are covered on both sides of the copper foil after graphene growth, so that the corrosion resistance of the copper foil can be improved.
3. The invention discloses a method for instantaneously reducing GO by using capacitor discharge and realizing roll-to-roll preparation of radiating fins, which can greatly reduce energy consumption compared with high-temperature graphitization of a heating furnace commonly used in the prior art, and the energy consumption per unit area is reduced by 50% at least from high temperature rise to 2800-3000 ℃ according to the total energy of single capacitor discharge estimated to be 1 KW.
4. GO is negatively charged, and a certain positive potential can be set in the nGr/Cu attaching GO process to realize intelligent thickness adjustment of GO.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
FIG. 1 is a schematic illustration of a preparation process according to an embodiment of the present invention;
FIG. 2 is a graph showing the change of nGr/Cu in FeCl3 etching solution with time in the embodiment of the invention;
FIG. 3 is an optical photograph of a transfer of a multi-layer graphene image to SiO2/Si in an embodiment of the present invention;
FIG. 4 is a Raman spectrum obtained by measuring cross areas of a multilayer graphene graph in an embodiment of the present invention;
Detailed Description
In the prior art, patent (CN 103157809B) discloses a preparation method of a graphene/metal nanoparticle composite material with a sandwich structure, wherein Graphene Oxide (GO) is reduced to graphene (G), metal ions (mn+) in a main salt are reduced to metal (M), and two types of reactions are performed simultaneously; the reduced metal nano particles can be deposited on the surface of graphene, and the graphene/metal nano particle composite material with a sandwich structure is obtained through centrifugal separation and vacuum drying treatment. In the invention, the temperature is raised by the instant discharging of the capacitor, and GO is reduced to RGO, which is basically different from the former.
In order to more clearly illustrate the technical scheme of the present invention, the present invention will be described in detail with reference to examples.
Example 1
The present embodiments relate to a method of preparing self-suspending multi-layered graphene, and more particularly, to a method of preparing multi-layered graphene using a roll-to-roll Chemical Vapor Deposition (CVD) apparatus, which can be independently present without spin-coating a polymeric support layer on a graphene surface. The result of the self-suspension experiment is shown in fig. 1, and an optical photograph and a raman photograph of the multilayer graphene transferred to SiO2/Si are shown in fig. 2.
In an embodiment, nGr/Cu of the multilayer graphene is used to attach Graphene Oxide (GO) commercially available. A certain positive potential is added at the Cu end of nGr/Cu, and the GO graphene contains-OH, -COOH, so that the GO graphene is generally shown as a negative potential, so that the thickness of the adsorbed graphene oxide can be controlled by adding different positive potentials at the Cu end of nGr/Cu.
In an example, a desired thickness of GO/nGr/Cu and GO/nGr/Cu sandwich structure was prepared, having a structure of Cu/nGr/GO/GO/nGr/Cu. Then, cu/nGr/GO/GO/nGr/Cu is rolled and molded under a certain pressure, and the connected capacitor is instantaneously discharged. In a preferred embodiment, the capacitor discharges instantaneously to generate heat up to 3000 ℃.
Two specific copper wires are distributed and attached to two ends of Cu/nGr/GO/GO/nGr/Cu. Since both Cu and nGr are good conductors and GO is a non-good conductor, the electrical energy is instantaneously transferred to GO, which, as in the preferred embodiment described above, generates a high temperature of 3000 ℃ to reduce GO to Reduced Graphene Oxide (RGO).
nGr/Cu in this example was prepared by a roll-to-roll CVD apparatus, so nGr/Cu can achieve roll-to-roll winding. Likewise, nGr/Cu can adsorb GO in a roll-to-roll fashion, forming coiled Cu/nGr/GO. Then, coiled Cu/nGr/GO can be bonded and formed
Cu/nGr/GO/GO/nGr/Cu. The capacitor discharge circuit is connected with the power supply through an external lead
Cu/nGr/GO/GO/nGr/Cu does not affect the roll-to-roll process, and finally Cu/nGr/RGO/RGO/nGr/Cu is obtained.
Example 2
The embodiment relates to the adjustment of the thickness of GO by setting positive potential in the GO attaching process of Gr/Cu, and the specific implementation condition of preparing a cooling fin by utilizing the method of the invention.
In this embodiment nGr/Cu is used to attach Graphene Oxide (GO). A positive potential is added at the Cu end of nGr/Cu, which is typically shown as a negative potential since GO graphene contains-OH, -COOH. In this embodiment, the positive potential of the Cu end is set between 0.1V and 100V, which can be used to adjust the thickness of the adsorbed graphene oxide. According to specific requirements, the thickness of the graphene oxide can be controlled by adjusting the positive potential so as to adapt to different application scenes.
In a specific embodiment, the Cu/nGr/RGO/nGr/Cu obtained in example 1 was cut and used directly or after etching Cu and then used, and was prepared as a heat sink. The cooling fin in the embodiment can be widely applied to electronic equipment, such as computers, mobile phones and the like, and is used for dissipating heat generated in the operation process of the equipment.
The above is only an example portion of the application and is not intended to limit the application in any way. Any simple modification, equivalent variation and modification of the above embodiments still fall within the scope of the protection of the technical solution of this application.
Claims (8)
1. A preparation method of a roll-to-roll graphene cooling fin is characterized by comprising the following steps of: attaching GO (graphene oxide) to one side surface of the multilayer graphene to obtain GO-covered multilayer graphene, and rolling two GO-covered multilayer graphene sheets after the attachment is completed after the GO surfaces are opposite to each other;
the outer surfaces of two sides of the sandwich structure are respectively externally connected with positive and negative electrodes for discharging, and high-temperature reduction is generated on GO opposite to the positive and negative electrodes to form RGO.
2. The method for preparing the roll-to-roll graphene heat sink according to claim 1, wherein the method comprises the following steps: the multilayer graphene is formed by covering a graphene layer on the surface of conductive metal, and the conductive metal external power supply is a capacitor after the sandwich structure is formed by rolling.
3. The method for preparing the roll-to-roll graphene heat sink according to claim 2, which is characterized by comprising the following steps:
s1, preparing nGr/Cu of multilayer graphene based on roll-to-roll CVD equipment, attaching GO to obtain a GO/nGr/Cu structure, wherein the conductive metal is Cu;
s2, two prepared GO/nGr/Cu structures are opposite to each other with GO surfaces, and a Cu/nGr/GO/GO/nGr/Cu sandwich structure is obtained by rolling, wherein the center of the sandwich structure is two layers of GO;
s3, respectively externally connecting the anode and the cathode of the capacitor with the two Cu layers, and immediately transferring the electric quantity to GO after discharging the capacitor to generate high temperature to reduce GO to RGO, thereby obtaining the Cu/nGr/RGO/RGO/nGr/Cu structure.
4. The method of manufacturing a roll-to-roll graphene fin according to claim 3, wherein nGr/Cu is roll-to-roll adsorbed GO through GO suspension to form rolled Cu/nGr/GO;
the coiled Cu/nGr/GO sandwich bonding forms Cu/nGr/GO/GO/nGr/Cu.
5. The method for preparing a roll-to-roll graphene heat sink of claim 3, further comprising S4: cu was removed by etching to obtain nGr/RGO/RGO/nGr.
6. The method for manufacturing the roll-to-roll graphene cooling fin according to claim 3, wherein the positive potential is set to be 0.1-100V in the nGr/Cu attaching GO process to achieve thickness adjustment of GO.
7. The method of manufacturing a roll-to-roll graphene heat sink according to claim 1, wherein the sandwich structure is applied to manufacturing a graphene heat sink.
8. A graphene heat sink prepared according to the method of claim 1 or 6, characterized in that: and (3) stretching and shearing the multi-layer sandwich structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311530495.4A CN117623288A (en) | 2023-11-16 | 2023-11-16 | Preparation method of reel-to-reel graphene cooling fin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311530495.4A CN117623288A (en) | 2023-11-16 | 2023-11-16 | Preparation method of reel-to-reel graphene cooling fin |
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| Publication Number | Publication Date |
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| CN117623288A true CN117623288A (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311530495.4A Pending CN117623288A (en) | 2023-11-16 | 2023-11-16 | Preparation method of reel-to-reel graphene cooling fin |
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| Country | Link |
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| CN (1) | CN117623288A (en) |
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2023
- 2023-11-16 CN CN202311530495.4A patent/CN117623288A/en active Pending
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