CN111818764A - Carbon radiating fin and preparation method thereof - Google Patents
Carbon radiating fin and preparation method thereof Download PDFInfo
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- CN111818764A CN111818764A CN202010692162.1A CN202010692162A CN111818764A CN 111818764 A CN111818764 A CN 111818764A CN 202010692162 A CN202010692162 A CN 202010692162A CN 111818764 A CN111818764 A CN 111818764A
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- 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
- H05K7/20954—Modifications to facilitate cooling, ventilating, or heating for display panels
- H05K7/20963—Heat transfer by conduction from internal heat source to heat radiating structure
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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
- C01B32/194—After-treatment
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
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Abstract
The invention relates to the technical field of semiconductor materials, in particular to a carbon radiating fin and a preparation method thereof; the radiating fin comprises a graphite film alkene layer and an aluminum foil layer, the graphite film alkene layer is connected with the aluminum foil layer through a heat-conducting adhesive, the graphite film alkene layer is an ionic liquid modified graphite film alkene layer, and the contact surface of the aluminum foil layer and the heat-conducting adhesive is a rough surface; the graphene layer is modified by the ionic liquid, so that the longitudinal thermal conductivity of the graphene layer can be improved to a certain extent, and the overall heat dissipation efficiency of the carbon heat dissipation sheet is further improved by combining the aluminum foil layer, so that the carbon heat dissipation sheet is suitable for more precise electronic products with higher heat dissipation requirements. The contact surface of aluminium foil layer and heat conduction adhesive is the matte, and the structural design of the matte on the aluminium foil layer has increased area of contact between aluminium foil layer and the heat conduction adhesive, has improved the adhesive strength between aluminium foil layer and the heat conduction adhesive to the whole radiating efficiency of carbon element fin has been improved.
Description
Technical Field
The invention relates to the technical field of semiconductor materials, in particular to a carbon radiating fin and a preparation method thereof.
Background
The carbon radiating fin is widely applied to radiating of new ultra-thin electronic products such as notebook computers, flat panel displays and LEDs, and the radiating performance is 2-3 times that of aluminum. The carbon radiating fin is directly adhered to the surface of the chip by the shape and color of the non-setting adhesive, and the carbon radiating fin can be tightly adhered to an adhered object due to the soft texture, and can quickly transfer heat to the metal shell and the radiating section bar due to high heat conductivity, so that the temperature of a heating point is reduced, and a better radiating effect is achieved.
Although the carbon heat sink has a low overall thermal conductivity, it has a low longitudinal thermal conductivity and poor interfacial properties, and cannot transfer heat well, and has a low bending resistance.
Disclosure of Invention
The purpose of the invention is: overcomes the defects in the prior art, and provides the carbon radiating fin with higher longitudinal heat conductivity coefficient and strong bending resistance.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a carbon element fin, the fin includes graphite membrane alkene layer and aluminium foil layer, connect through heat conduction adhesive between graphite membrane alkene layer and the aluminium foil layer, graphite membrane alkene layer is the modified graphite membrane alkene layer of ionic liquid, the aluminium foil layer is the rough surface with the contact surface of heat conduction adhesive.
Further, the rough surface is composed of a plurality of abrasive grains or a plurality of conical protrusions.
Further, the height of the plurality of conical protrusions is 15-18 μm, and the mesh number of the plurality of conical protrusions is 10-30 meshes.
Further, the heat-conducting adhesive comprises the following components in parts by mass: 30-40 parts of polyurethane prepolymer modified epoxy resin, 10-40 parts of epoxy resin matrix with epoxy groups at two ends of a molecular chain, 2-8 parts of imidazole compound, 0.2-0.4 part of platinum catalyst, 30 parts of aluminum oxide, 15 parts of aluminum hydroxide and 5 parts of boron nitride.
Further, the thickness of the graphene layer of the graphite film is 30-35 μm, the thickness of the heat-conducting adhesive is 20-30 μm, and the thickness of the aluminum foil layer is 30-50 μm.
Another object of the invention is: the method overcomes the defects in the prior art, and provides the method for preparing the carbon radiating fin with higher longitudinal heat conductivity coefficient and strong bending resistance.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a preparation method of a carbon radiating fin comprises the following steps:
preparing an S1 ionic liquid modified graphene layer;
s2 preparing a conductive adhesive;
s3, coating a layer of heat-conducting adhesive on the rough surface of the aluminum foil layer, then coating an ionic liquid modified graphite film graphene layer, and carrying out composite molding on the aluminum foil layer on a rewinding machine.
Further, the preparation method of the ionic liquid modified graphene layer comprises the following steps:
s1, uniformly dispersing graphene into mixed ionic liquid of (BMIM) PF6 and (MAIM) PF6, and stirring to form a casting solution, wherein the graphene concentration of the casting solution is 0.15-0.18 mg/ml;
s2, filtering the casting solution by using a base material membrane to form a wet-state modified graphene membrane on the base material membrane;
s3, drying the wet modified graphene film and the base material film together at normal temperature, and then peeling the dried modified graphene film from the base material film to obtain the modified graphene film.
The technical scheme adopted by the invention has the beneficial effects that:
the graphene layer is modified by the ionic liquid, so that the longitudinal thermal conductivity of the graphene layer can be improved to a certain extent, and the overall heat dissipation efficiency of the carbon heat dissipation sheet is further improved by combining the aluminum foil layer, so that the carbon heat dissipation sheet is suitable for more precise electronic products with higher heat dissipation requirements. The contact surface of aluminium foil layer and heat conduction adhesive is the matte, and the structural design of the matte on the aluminium foil layer has increased area of contact between aluminium foil layer and the heat conduction adhesive, has improved the adhesive strength between aluminium foil layer and the heat conduction adhesive to the whole radiating efficiency of carbon element fin has been improved.
The preparation method of the carbon radiating fin has the advantages of simple process and low cost, and the prepared carbon radiating fin has uniform thickness, and compared with the traditional single-layer graphene heat-conducting film, the heat conductivity is obviously improved.
Detailed Description
The following examples are intended to provide those skilled in the art with a more complete understanding of the present invention, and are not intended to limit the scope of the present invention. Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The utility model provides a carbon cooling fin, the fin includes graphite membrane alkene layer and aluminium foil layer, connects through heat conduction adhesive between graphite membrane alkene layer and the aluminium foil layer, and graphite membrane alkene layer is the modified graphite membrane alkene layer of ionic liquid, and the modified graphite alkene layer of ionic liquid can improve the vertical heat conductivity on graphite alkene layer to a certain extent, combines the aluminium foil layer, has further improved the whole radiating efficiency of carbon cooling fin to make the carbon cooling fin in the invention be applicable to the more accurate electronic product that the heat dissipation required is higher. The contact surface of the aluminum foil layer and the heat-conducting adhesive is a rough surface, and the structural design of the rough surface on the aluminum foil layer increases the contact area between the aluminum foil layer and the heat-conducting adhesive, improves the bonding strength between the aluminum foil layer and the heat-conducting adhesive, therefore, the overall heat dissipation efficiency of the carbon heat dissipation fin is improved, preferably, the rough surface is composed of a plurality of frosted lines or a plurality of conical protrusions, the height of the frosted lines is 10-12 mu m, the height of the frosted lines is controlled within the range, the bonding strength is high, the heat conductivity is strong, the height of the conical protrusions is 15-18 mu m, the mesh number of the conical protrusions is 10-30 meshes, the height and the mesh number of the conical protrusions are controlled within the range, the bonding strength between the aluminum foil layer and the bonding agent is high, the volume of the aluminum foil layer penetrating into the bonding agent layer is large, and therefore the heat dissipation performance of the carbon heat dissipation fin is further improved. The thickness of the graphene layer of the graphite film is 30-35 mu m, the thickness of the heat-conducting adhesive is 20-30 mu m, the thickness of the aluminum foil layer is 30-50 mu m, and the heat-conducting adhesive comprises the following components in parts by mass: 30-40 parts of polyurethane prepolymer modified epoxy resin, 10-40 parts of epoxy resin matrix with epoxy groups at two ends of a molecular chain, 2-8 parts of imidazole compound, 0.2-0.4 part of platinum catalyst, 30 parts of aluminum oxide, 15 parts of aluminum hydroxide and 5 parts of boron nitride.
The preparation method of the carbon radiating fin comprises the following steps:
preparing an S1 ionic liquid modified graphene layer;
s2 preparing a conductive adhesive;
s3, coating a layer of heat-conducting adhesive on the rough surface of the aluminum foil layer, then coating an ionic liquid modified graphite film graphene layer, and carrying out composite molding on the aluminum foil layer on a rewinding machine.
The preparation method of the carbon radiating fin is simple in preparation process, the prepared carbon radiating fin is uniform in thickness, and compared with a traditional single-layer graphene heat-conducting film, the heat conductivity is remarkably improved.
The preparation method of the ionic liquid modified graphene layer comprises the following steps:
s1, uniformly dispersing graphene into mixed ionic liquid of (BMIM) PF6 and (MAIM) PF6, and stirring to form a casting solution, wherein the graphene concentration of the casting solution is 0.15-0.18 mg/ml;
s2, filtering the casting solution by using a base material membrane to form a wet-state modified graphene membrane on the base material membrane;
s3, drying the wet modified graphene film and the base material film together at normal temperature, and then peeling the dried modified graphene film from the base material film to obtain the modified graphene film.
Example 1
The utility model provides a carbon element fin, the fin includes graphite membrane alkene layer and aluminium foil layer, connects through heat conduction adhesive between graphite membrane alkene layer and the aluminium foil layer, and graphite membrane alkene layer is ionic liquid modified graphite membrane alkene layer, and the aluminium foil layer is the rough surface with the contact surface of heat conduction adhesive, and the rough surface comprises a plurality of dull polish lines or a plurality of toper are protruding, and the prominent height of a plurality of cones is 15 mu m, and the prominent mesh number of a plurality of cones is 10 meshes. The thickness of the ink film alkene layer is 30 mu m, the thickness of the heat conduction adhesive is 20 mu m, and the thickness of the aluminum foil layer is 30 mu m.
The heat-conducting adhesive comprises the following components in parts by mass: 30-parts of polyurethane prepolymer modified epoxy resin, 10 parts of an epoxy resin matrix with epoxy groups at two ends of a molecular chain, 2 parts of an imidazole compound, 0.2 part of a platinum catalyst, 30 parts of alumina, 15 parts of aluminum hydroxide and 5 parts of boron nitride.
The preparation method of the carbon radiating fin comprises the following steps:
preparing an S1 ionic liquid modified graphene layer;
s2 preparing a conductive adhesive;
s3, coating a layer of heat-conducting adhesive on the rough surface of the aluminum foil layer, then coating an ionic liquid modified graphite film graphene layer, and carrying out composite molding on the aluminum foil layer on a rewinding machine.
The preparation method of the ionic liquid modified graphene layer comprises the following steps:
s1, uniformly dispersing graphene into a mixed ionic liquid of (BMIM) PF6 and (MAIM) PF6, and stirring to form a casting solution, wherein the graphene concentration of the casting solution is 0.15 mg/ml;
s2, filtering the casting solution by using a base material membrane to form a wet-state modified graphene membrane on the base material membrane;
s3, drying the wet modified graphene film and the base material film together at normal temperature, and then peeling the dried modified graphene film from the base material film to obtain the modified graphene film.
In the present invention
Example 2
The utility model provides a carbon element fin, the fin includes graphite membrane alkene layer and aluminium foil layer, connects through heat conduction adhesive between graphite membrane alkene layer and the aluminium foil layer, and graphite membrane alkene layer is ionic liquid modified graphite membrane alkene layer, and the aluminium foil layer is the rough surface with the contact surface of heat conduction adhesive, and the rough surface comprises a plurality of dull polish lines or a plurality of toper are protruding, and the prominent height of a plurality of cones is 16 mu m, and the prominent mesh number of a plurality of cones is 15 meshes. The thickness of the ink film alkene layer is 30 mu m, the thickness of the heat conduction adhesive is 22 mu m, and the thickness of the aluminum foil layer is 35 mu m.
The heat-conducting adhesive comprises the following components in parts by mass: 32 parts of polyurethane prepolymer modified epoxy resin, 15 parts of epoxy resin matrix with epoxy groups at two ends of a molecular chain, 3 parts of imidazole compound, 0.22 part of platinum catalyst, 30 parts of alumina, 15 parts of aluminum hydroxide and 5 parts of boron nitride.
The preparation method of the carbon radiating fin comprises the following steps:
preparing an S1 ionic liquid modified graphene layer;
s2 preparing a conductive adhesive;
s3, coating a layer of heat-conducting adhesive on the rough surface of the aluminum foil layer, then coating an ionic liquid modified graphite film graphene layer, and carrying out composite molding on the aluminum foil layer on a rewinding machine.
The preparation method of the ionic liquid modified graphene layer comprises the following steps:
s1, uniformly dispersing graphene into a mixed ionic liquid of (BMIM) PF6 and (MAIM) PF6, and stirring to form a casting solution, wherein the graphene concentration of the casting solution is 0.15 mg/ml;
s2, filtering the casting solution by using a base material membrane to form a wet-state modified graphene membrane on the base material membrane;
s3, drying the wet modified graphene film and the base material film together at normal temperature, and then peeling the dried modified graphene film from the base material film to obtain the modified graphene film.
Example 3
The utility model provides a carbon element fin, the fin includes graphite membrane alkene layer and aluminium foil layer, connects through heat conduction adhesive between graphite membrane alkene layer and the aluminium foil layer, and graphite membrane alkene layer is ionic liquid modified graphite membrane alkene layer, and the aluminium foil layer is the rough surface with the contact surface of heat conduction adhesive, and the rough surface comprises a plurality of dull polish lines or a plurality of toper are protruding, and the prominent height of a plurality of cones is 16 mu m, and the prominent mesh number of a plurality of cones is 20 meshes. The thickness of the ink film alkene layer is 32 mu m, the thickness of the heat conduction adhesive is 25 mu m, and the thickness of the aluminum foil layer is 40 mu m.
The heat-conducting adhesive comprises the following components in parts by mass: 35 parts of polyurethane prepolymer modified epoxy resin, 25 parts of epoxy resin matrix with epoxy groups at two ends of a molecular chain, 5 parts of imidazole compound, 0.3 part of platinum catalyst, 30 parts of alumina, 15 parts of aluminum hydroxide and 5 parts of boron nitride.
The preparation method of the carbon radiating fin comprises the following steps:
preparing an S1 ionic liquid modified graphene layer;
s2 preparing a conductive adhesive;
s3, coating a layer of heat-conducting adhesive on the rough surface of the aluminum foil layer, then coating an ionic liquid modified graphite film graphene layer, and carrying out composite molding on the aluminum foil layer on a rewinding machine.
The preparation method of the ionic liquid modified graphene layer comprises the following steps:
s1, uniformly dispersing graphene into a mixed ionic liquid of (BMIM) PF6 and (MAIM) PF6, and stirring to form a casting solution, wherein the graphene concentration of the casting solution is 0.16 mg/ml;
s2, filtering the casting solution by using a base material membrane to form a wet-state modified graphene membrane on the base material membrane;
s3, drying the wet modified graphene film and the base material film together at normal temperature, and then peeling the dried modified graphene film from the base material film to obtain the modified graphene film.
Example 4
The utility model provides a carbon element fin, the fin includes graphite membrane alkene layer and aluminium foil layer, connects through heat conduction adhesive between graphite membrane alkene layer and the aluminium foil layer, and graphite membrane alkene layer is ionic liquid modified graphite membrane alkene layer, and the aluminium foil layer is the rough surface with the contact surface of heat conduction adhesive, and the rough surface comprises a plurality of dull polish lines or a plurality of toper are protruding, and the prominent height of a plurality of cones is 17 mu m, and the prominent mesh number of a plurality of cones is 25 meshes. The thickness of the ink film alkene layer is 32 mu m, the thickness of the heat conduction adhesive is 28 mu m, and the thickness of the aluminum foil layer is 32 mu m.
The heat-conducting adhesive comprises the following components in parts by mass: 35 parts of polyurethane prepolymer modified epoxy resin, 35 parts of an epoxy resin matrix with epoxy groups at two ends of a molecular chain, 6 parts of an imidazole compound, 0.38 part of a platinum catalyst, 30 parts of alumina, 15 parts of aluminum hydroxide and 5 parts of boron nitride.
The preparation method of the carbon radiating fin comprises the following steps:
preparing an S1 ionic liquid modified graphene layer;
s2 preparing a conductive adhesive;
s3, coating a layer of heat-conducting adhesive on the rough surface of the aluminum foil layer, then coating an ionic liquid modified graphite film graphene layer, and carrying out composite molding on the aluminum foil layer on a rewinding machine.
The preparation method of the ionic liquid modified graphene layer comprises the following steps:
s1, uniformly dispersing graphene into a mixed ionic liquid of (BMIM) PF6 and (MAIM) PF6, and stirring to form a casting solution, wherein the graphene concentration of the casting solution is 0.16 mg/ml;
s2, filtering the casting solution by using a base material membrane to form a wet-state modified graphene membrane on the base material membrane;
s3, drying the wet modified graphene film and the base material film together at normal temperature, and then peeling the dried modified graphene film from the base material film to obtain the modified graphene film.
Example 5
A carbon radiating fin comprises a graphite film alkene layer and an aluminum foil layer, wherein the graphite film alkene layer is connected with the aluminum foil layer through a heat conduction adhesive, the graphite film alkene layer is an ionic liquid modified graphite film alkene layer, the contact surface of the aluminum foil layer and the heat conduction adhesive is a rough surface, the rough surface is formed by a plurality of frosted lines or a plurality of conical protrusions, the height of the conical protrusions is 18 mu m, and the mesh number of the conical protrusions is 30 meshes. The thickness of the ink film alkene layer is 35 mu m, the thickness of the heat conduction adhesive is 30 mu m, and the thickness of the aluminum foil layer is 50 mu m.
The heat-conducting adhesive comprises the following components in parts by mass: 40 parts of polyurethane prepolymer modified epoxy resin, 40 parts of an epoxy resin matrix with epoxy groups at two ends of a molecular chain, 8 parts of an imidazole compound, 0.4 part of a platinum catalyst, 30 parts of alumina, 15 parts of aluminum hydroxide and 5 parts of boron nitride.
The preparation method of the carbon radiating fin comprises the following steps:
preparing an S1 ionic liquid modified graphene layer;
s2 preparing a conductive adhesive;
s3, coating a layer of heat-conducting adhesive on the rough surface of the aluminum foil layer, then coating an ionic liquid modified graphite film graphene layer, and carrying out composite molding on the aluminum foil layer on a rewinding machine.
The preparation method of the ionic liquid modified graphene layer comprises the following steps:
s1, uniformly dispersing graphene into a mixed ionic liquid of (BMIM) PF6 and (MAIM) PF6, and stirring to form a casting solution, wherein the graphene concentration of the casting solution is 0.18 mg/ml;
s2, filtering the casting solution by using a base material membrane to form a wet-state modified graphene membrane on the base material membrane;
s3, drying the wet modified graphene film and the base material film together at normal temperature, and then peeling the dried modified graphene film from the base material film to obtain the modified graphene film.
Comparative example 1
In contrast to example 3, the heat sink in comparative example 1 employs only a single layer of conventional graphene film.
Comparative example 2
In contrast to example 3, the fin of comparative example 1 employs only a single layer of ionic liquid modified graphene membrane.
Comparative example 3
In contrast to example 3, the heat sink in comparative example 1 is a conventional graphene film attached to an aluminum foil layer by a thermally conductive adhesive.
The heat sinks manufactured in examples 1 to 5 and comparative examples 1 to 3 were measured only from the thermal conductivity, which was measured by the hot drop test method.
| Thermal conductivity (W/M.K) | |
| Example 1 | 660.32 |
| Example 2 | 670.28 |
| Example 3 | 675.12 |
| Example 4 | 680.23 |
| Example 5 | 688.34 |
| Comparative example 1 | 332.12 |
| Comparative example 2 | 450.12 |
| Comparative example 3 | 488.12 |
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. A carbon cooling fin is characterized in that: the radiating fin comprises a graphite film alkene layer and an aluminum foil layer, the graphite film alkene layer and the aluminum foil layer are connected through a heat-conducting adhesive, the graphite film alkene layer is an ionic liquid modified graphite film alkene layer, and the contact surface of the aluminum foil layer and the heat-conducting adhesive is a rough surface.
2. The carbon heat sink as set forth in claim 1, wherein: the rough surface is composed of a plurality of frosted grains or a plurality of conical protrusions.
3. The carbon heat sink as set forth in claim 2, wherein: the height of the plurality of conical protrusions is 15-18 mu m, and the mesh number of the plurality of conical protrusions is 10-30 meshes.
4. The carbon heat sink as set forth in claim 2, wherein: the heat-conducting adhesive comprises the following components in parts by mass: 30-40 parts of polyurethane prepolymer modified epoxy resin, 10-40 parts of epoxy resin matrix with epoxy groups at two ends of a molecular chain, 2-8 parts of imidazole compound, 0.2-0.4 part of platinum catalyst, 30 parts of aluminum oxide, 15 parts of aluminum hydroxide and 5 parts of boron nitride.
5. The carbon heat sink as set forth in claim 1, wherein: the thickness of the graphite film graphene layer is 30-35 mu m, the thickness of the heat-conducting adhesive is 20-30 mu m, and the thickness of the aluminum foil layer is 30-50 mu m.
6. The method of manufacturing a carbon fin as claimed in any one of claims 1 to 5, wherein: the preparation method comprises the following steps:
preparing an S1 ionic liquid modified graphene layer;
s2 preparing a conductive adhesive;
s3, coating a layer of heat-conducting adhesive on the rough surface of the aluminum foil layer, then coating an ionic liquid modified graphite film graphene layer, and carrying out composite molding on the aluminum foil layer on a rewinding machine.
7. The carbon heat sink as set forth in claim 6, wherein: the preparation method of the ionic liquid modified graphene film layer comprises the following steps:
s1, uniformly dispersing graphene into mixed ionic liquid of (BMIM) PF6 and (MAIM) PF6, and stirring to form a casting solution, wherein the graphene concentration of the casting solution is 0.15-0.18 mg/ml;
s2, filtering the casting solution by using a base material membrane to form a wet-state modified graphene membrane on the base material membrane;
s3, drying the wet modified graphene film and the base material film together at normal temperature, and then peeling the dried modified graphene film from the base material film to obtain the modified graphene film.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113355058A (en) * | 2021-06-04 | 2021-09-07 | 上海交通大学 | Two-dimensional carbon-metal configuration composite material and preparation method and application thereof |
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