CN110589810A - Production process of high-thermal-conductivity flexible graphene film gasket - Google Patents
Production process of high-thermal-conductivity flexible graphene film gasket Download PDFInfo
- Publication number
- CN110589810A CN110589810A CN201910941740.8A CN201910941740A CN110589810A CN 110589810 A CN110589810 A CN 110589810A CN 201910941740 A CN201910941740 A CN 201910941740A CN 110589810 A CN110589810 A CN 110589810A
- Authority
- CN
- China
- Prior art keywords
- graphene film
- few
- graphene
- film
- layer porous
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/18—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using profiled rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/14—Control arrangements for mechanically-driven presses
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
-
- 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
Abstract
The invention discloses a production process of a high-heat-conductivity flexible graphene film gasket, wherein the heat-conductivity gasket comprises a few-layer porous graphene film and a film-based heat-conducting net vertically arranged on a few-layer porous graphene film substrate, and is characterized by comprising the following process steps: screening the graphene by a sieve; rolling the graphene with the sieved mesh by a roller press to prepare a graphene film; preparing a curtain coating slurry, and coating the curtain coating slurry on the few-layer porous graphene film through a curtain coating machine; and coating the slurry on the few-layer porous graphene film, and then performing roll forming and drying to form a longitudinally and transversely interwoven film heat-conducting net vertical to the few-layer porous graphene film, and compounding to form the high-heat-conductivity flexible graphene film gasket. Through the compounding of the slurry heat-conducting net with excellent heat-conducting property, the heat-conducting channel of the film is effectively increased, the heat-conducting property of the film in the X and Z directions is improved, the interlayer strength of the stacked few layers of films is improved, and the composite material heat-conducting gasket has excellent heat-conducting property.
Description
Technical Field
The invention relates to the technical field of heat conduction materials, in particular to a production process of a high-heat-conduction flexible graphene film gasket.
Background
Graphene possesses high strength, ultra-thin, excellent thermal conductivity, but also has limitations. Compared with other materials using graphene or graphite for heat conduction, the developed high-heat-conduction flexible graphene film gasket has the advantages that a good heat conduction channel is formed, good processing and impact properties are realized, and the defect that the impact performance of a graphene heat conduction material is insufficient is effectively overcome.
The 5G technology has been promoted to the national strategy by a plurality of countries, and according to the forecast, only 5G mobile phones will break through 1 hundred million in 2021 year in annual sales, the number of base stations will increase to 800 ten thousand, and the technology will bring huge market increment. The development trend of electronic equipment is light, thin, high-speed and functional, and the limited space design means that higher requirements are put on heat conduction materials. With this trend, the high thermal conductivity flexible graphene thin film gasket will occupy a niche in the 5G market.
The high-heat-conduction flexible graphene film gasket is an ultrathin heat dissipation material, can effectively reduce the heat density of a heating source, achieves large-area rapid heat transfer and large-area heat dissipation, and eliminates the phenomenon of single-point high temperature. The thickness of the high-heat-conductivity flexible graphene film gasket product can be selected from various shapes and can be punched into any specified shape, so that the high-heat-conductivity flexible graphene film gasket can be conveniently used in various products, especially in electronic products with space limitation. The high-thermal-conductivity flexible graphene film gasket is small in volume, and due to the advantage of light weight, the high-thermal-conductivity flexible graphene film gasket belongs to a design mode which does not increase the weight of a terminal product at most in the existing heat dissipation scheme, and the high-thermal-conductivity graphene film is soft in texture, excellent in processability and usability and free of extra electromagnetic wave interference.
The traditional low-end products such as heat conduction oil, heat conduction silicone grease, heat conduction silicone adhesive tape and the like all use silica gel or other high polymer materials as base materials, and the composite material has a heat conduction channel by filling heat conduction powder, so that the heat conduction effect of the material is achieved, the more powder is filled, the more reasonable the particle size matching of the powder is, the more heat conduction channels are, the higher the heat conduction coefficient of the corresponding material is, but as the filling materials are more and more, the mechanical properties of the product, particularly the tensile strength and the compressibility are greatly reduced, so that the application in many occasions is limited, and meanwhile, the more powder is filled, the density of the material is increased, which is obviously inconsistent with the trend of pursuing lightness and user physical examination at present, so that a production process of the high-heat-conduction flexible graphene film gasket is provided for solving the problems.
Disclosure of Invention
The invention aims to provide a production process of a high-thermal-conductivity flexible graphene film gasket, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a production process of a high-thermal-conductivity flexible graphene film gasket comprises a few-layer porous graphene film and a film-based heat conduction net vertically arranged on a few-layer porous graphene film substrate, and comprises the following process steps:
1) screening the graphene by a sieve;
2) rolling the graphene with the sieved sieve by a roller press to prepare a graphene film;
3) preparing a curtain coating slurry, and coating the curtain coating slurry on the few-layer porous graphene film through a curtain coating machine;
4) and coating the slurry on the few-layer porous graphene film, and then performing roll forming and drying to form a vertically and horizontally interwoven film heat-conducting net vertical to the few-layer porous graphene film, thereby compounding and forming the high-heat-conductivity flexible graphene film gasket.
In a preferred embodiment, in step 1), the graphene is a few-layer porous graphene without adding a flexible polymer material, and the graphene is screened through a 100-mesh 200-mesh sieve, and the thickness of the substrate of the few-layer porous graphene is 10nm to 50 μm, such as 10nm, 20nm, 1 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm or 50 μm, but not limited to the values listed, and other values not listed in the range of the values are also applicable.
In a preferable embodiment, in step 2), during roll forming, the graphene is located in the dropping hopper, a pair of parallel and level installed compression rollers is arranged below the dropping hopper, the diameters of the compression rollers are the same and rotate oppositely, the pressure of the compression rollers is 3000 and 9000N, 5-60rpm, and after the graphene falls into the space between the two compression rollers from the dropping hopper, the graphene is rolled to form the graphene film substrate.
In a preferred embodiment, a stirring device is arranged in the blanking hopper for placing graphene stacks, a traction device is arranged at the bottom of the two compression rollers, the traction device is a horizontally-installed conveyor belt, the advancing speed of the conveyor belt is the same as the descending speed of the graphene film substrate, and the speed (m/s) is equal to the rotation speed (rpm) of the compression rollers and the circumference (m) of the compression rollers.
In a preferred embodiment, in step 3), the flow coating slurry is prepared from one or more of graphene, carbon nanotubes and carbon fibers.
In a preferable embodiment, in the step 4), the slurry is coated on the few-layer porous graphene film, and then the few-layer porous graphene film is extruded and formed in a heating box through two heated press rolls, wherein the temperature in the heating box is 30-50 ℃, and the drying time is 5-10 minutes.
In a preferred embodiment, the number of the heat conductive mesh layers is at least five, the thickness of the heat conductive mesh layers is 10 to 80 μm, such as 10 μm, 20 μm, 30 μm, 40 μm, 50 μm or 80 μm, but not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable, the number of the stacked few-layer porous graphene thin films is a plurality of layers, and the number of the stacked few-layer porous graphene thin films may be 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 or 100, but not limited to the above-mentioned values, and the thickness of the thin film mat after the combination of the few-layer porous graphene thin films and the thin film-based heat conductive mesh vertically arranged on the few-layer porous graphene thin film substrate is 0.05 to 2.0mm, such as 0.05mm, 0.08mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.65mm, 0.6mm, 0.55mm, 0.6mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 1.0mm, 1.05mm, 1.1mm, 1.2mm, 1.5mm, or 2.5mm, etc., but is not limited to the recited values, and other values not recited within the range of values are also applicable.
Compared with the prior art, the invention has the beneficial effects that: through compounding of the graphene/carbon nanotube/carbon fiber film with excellent heat conduction performance, a heat conduction channel of the film is effectively increased, the heat conduction performance of the film in X and Z directions is greatly improved, the interlayer strength of the film with few layers when the film is laminated is improved, the prepared graphene/carbon nanotube/carbon fiber film heat conduction gasket composite material has excellent heat conduction performance, and can be applied to the aspects of heat dissipation of electronic product chips such as mobile phones and computers, energy conservation and consumption reduction of equipment such as compressors and the like; the heat conductivity coefficient of the heat conduction gasket is about 917W/(m.K) when the slice thickness is 0.1mm, and the heat conductivity coefficient is 509.84W/(m.K) when the slice thickness is 2.0 mm; the heat-conducting gasket has excellent tensile and compressive deformation performances, light weight and tensile strength of more than 13.661 MPa.
Drawings
FIG. 1 is a schematic structural diagram of a few-layer porous graphene according to the present invention;
fig. 2 is a schematic structural diagram of a few-layer (5-7-layer) porous graphene film according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The invention provides a technical scheme that: a production process of a high-thermal-conductivity flexible graphene film gasket comprises the following process steps of:
1) screening the graphene by a sieve;
2) rolling the graphene with the sieved sieve by a roller press to prepare a graphene film;
3) preparing a curtain coating slurry, and coating the curtain coating slurry on the few-layer porous graphene film through a curtain coating machine;
4) and coating the slurry on the few-layer porous graphene film, and then performing roll forming and drying to form a vertically and horizontally interwoven film heat-conducting net vertical to the few-layer porous graphene film, thereby compounding and forming the high-heat-conductivity flexible graphene film gasket.
In the step 1), the graphene is a few-layer porous graphene without adding a flexible high polymer material, the graphene is screened by a 100-mesh and 200-mesh sieve, and the thickness of a substrate of the few-layer porous graphene is 10 nm-50 μm.
In step 2), during roll-in molding, graphene is located in the blanking hopper, a pair of parallel and level installed compression rollers are arranged below the blanking hopper, the diameters of the compression rollers are the same and rotate in opposite directions, the pressure of the compression rollers is 3000-9000N, 5-60rpm, and after the graphene falls into the space between the two compression rollers from the blanking hopper, the graphene is rolled to form a graphene film substrate.
Be equipped with agitating unit in the blanking fill and place graphite alkene and pile up, two compression roller bottoms are equipped with draw gear, and draw gear is horizontal installation's conveyer belt, and the forward speed of conveyer belt is the same with the slew velocity of graphite alkene film substrate, and this speed (m/s) equals compression roller rotational speed (rpm) compression roller girth (m).
In the step 3), the curtain coating slurry is prepared from one of graphene, carbon nanotubes and carbon fibers.
And 4) coating the slurry on the few-layer porous graphene film, and then carrying out extrusion forming in a heating box through two heated press rollers, wherein the temperature in the heating box is 30-50 ℃, and the drying time is 5-10 minutes.
The number of layers of the heat conduction net is at least five, the thickness of the heat conduction net layer is 10-80 mu m, the number of stacked layers of the few-layer porous graphene film is 5 more layers, and the thickness of the film gasket formed by compounding the few-layer porous graphene film and the film-based heat conduction net vertically arranged on the few-layer porous graphene film base material is 0.08 mm.
And finally, compounding the few-layer porous graphene film in the heat conduction gasket, and compounding the graphene/carbon nanotube/carbon fiber film-based heat conduction net vertically arranged on the few-layer porous graphene film substrate to obtain the heat conduction gasket with the thickness of 0.08mm, wherein the heat conduction coefficient of the heat conduction gasket is 405.6W/(m.K).
Example two
The invention provides a technical scheme that: a production process of a high-thermal-conductivity flexible graphene film gasket comprises the following process steps of:
1) screening the graphene by a sieve;
2) rolling the graphene with the sieved sieve by a roller press to prepare a graphene film;
3) preparing a curtain coating slurry, and coating the curtain coating slurry on the few-layer porous graphene film through a curtain coating machine;
4) and coating the slurry on the few-layer porous graphene film, and then performing roll forming and drying to form a vertically and horizontally interwoven film heat-conducting net vertical to the few-layer porous graphene film, thereby compounding and forming the high-heat-conductivity flexible graphene film gasket.
In the step 1), the graphene is a few-layer porous graphene without adding a flexible high polymer material, the graphene is screened by a 100-mesh and 200-mesh sieve, and the thickness of a substrate of the few-layer porous graphene is 10 nm-50 μm.
In step 2), during roll-in molding, graphene is located in the blanking hopper, a pair of parallel and level installed compression rollers are arranged below the blanking hopper, the diameters of the compression rollers are the same and rotate in opposite directions, the pressure of the compression rollers is 3000-9000N, 5-60rpm, and after the graphene falls into the space between the two compression rollers from the blanking hopper, the graphene is rolled to form a graphene film substrate.
Be equipped with agitating unit in the blanking fill and place graphite alkene and pile up, two compression roller bottoms are equipped with draw gear, and draw gear is horizontal installation's conveyer belt, and the forward speed of conveyer belt is the same with the slew velocity of graphite alkene film substrate, and this speed (m/s) equals compression roller rotational speed (rpm) compression roller girth (m).
In the step 3), the curtain coating slurry is prepared by mixing graphene and carbon nanotubes.
And 4) coating the slurry on the few-layer porous graphene film, and then carrying out extrusion forming in a heating box through two heated press rollers, wherein the temperature in the heating box is 30-50 ℃, and the drying time is 5-10 minutes.
The number of layers of the heat conduction net is at least five, the thickness of the heat conduction net layer is 10-80 mu m, the number of stacked layers of the few-layer porous graphene films is multiple, and the thickness of the film gasket formed by compounding the few-layer porous graphene films and the film-based heat conduction net vertically arranged on the few-layer porous graphene film base material is 1.0 mm.
And finally compounding the few-layer porous graphene film in the heat conduction gasket and the graphene-carbon nanotube film-based heat conduction net vertically arranged on the few-layer porous graphene film substrate, wherein the thickness of the compounded few-layer porous graphene film is 1.0mm, and the heat conduction coefficient of the heat conduction gasket is 382.3W/(m.K).
EXAMPLE III
The invention provides a technical scheme that: a production process of a high-thermal-conductivity flexible graphene film gasket comprises the following process steps of:
1) screening the graphene by a sieve;
2) rolling the graphene with the sieved sieve by a roller press to prepare a graphene film;
3) preparing a curtain coating slurry, and coating the curtain coating slurry on the few-layer porous graphene film through a curtain coating machine;
4) and coating the slurry on the few-layer porous graphene film, and then performing roll forming and drying to form a vertically and horizontally interwoven film heat-conducting net vertical to the few-layer porous graphene film, thereby compounding and forming the high-heat-conductivity flexible graphene film gasket.
In the step 1), the graphene is a few-layer porous graphene without adding a flexible high polymer material, the graphene is screened by a 100-mesh and 200-mesh sieve, and the thickness of a substrate of the few-layer porous graphene is 10 nm-50 μm.
In step 2), during roll-in molding, graphene is located in the blanking hopper, a pair of parallel and level installed compression rollers are arranged below the blanking hopper, the diameters of the compression rollers are the same and rotate in opposite directions, the pressure of the compression rollers is 3000-9000N, 5-60rpm, and after the graphene falls into the space between the two compression rollers from the blanking hopper, the graphene is rolled to form a graphene film substrate.
Be equipped with agitating unit in the blanking fill and place graphite alkene and pile up, two compression roller bottoms are equipped with draw gear, and draw gear is horizontal installation's conveyer belt, and the forward speed of conveyer belt is the same with the slew velocity of graphite alkene film substrate, and this speed (m/s) equals compression roller rotational speed (rpm) compression roller girth (m).
In the step 3), the curtain coating slurry is prepared by mixing graphene and carbon nanotubes.
And 4) coating the slurry on the few-layer porous graphene film, and then carrying out extrusion forming in a heating box through two heated press rollers, wherein the temperature in the heating box is 30-50 ℃, and the drying time is 5-10 minutes.
The number of layers of the heat conduction net is at least five, the thickness of the heat conduction net layer is 10-80 mu m, the number of stacked layers of the few-layer porous graphene films is multiple, and the thickness of the film gasket formed by compounding the few-layer porous graphene films and the film-based heat conduction net vertically arranged on the few-layer porous graphene film base material is 1.0 mm.
And finally compounding the few-layer porous graphene film in the heat conduction gasket and the graphene-carbon nanotube film-based heat conduction net vertically arranged on the few-layer porous graphene film substrate, wherein the thickness of the compounded few-layer porous graphene film is 1.5mm, and the heat conduction coefficient of the heat conduction gasket is 335.9W/(m.K).
Example four
The invention provides a technical scheme that: a production process of a high-thermal-conductivity flexible graphene film gasket comprises the following process steps of:
1) screening the graphene by a sieve;
2) rolling the graphene with the sieved sieve by a roller press to prepare a graphene film;
3) preparing a curtain coating slurry, and coating the curtain coating slurry on the few-layer porous graphene film through a curtain coating machine;
4) and coating the slurry on the few-layer porous graphene film, and then performing roll forming and drying to form a vertically and horizontally interwoven film heat-conducting net vertical to the few-layer porous graphene film, thereby compounding and forming the high-heat-conductivity flexible graphene film gasket.
In the step 1), the graphene is a few-layer porous graphene without adding a flexible high polymer material, the graphene is screened by a 100-mesh and 200-mesh sieve, and the thickness of a substrate of the few-layer porous graphene is 10 nm-50 μm.
In step 2), during roll-in molding, graphene is located in the blanking hopper, a pair of parallel and level installed compression rollers are arranged below the blanking hopper, the diameters of the compression rollers are the same and rotate in opposite directions, the pressure of the compression rollers is 3000-9000N, 5-60rpm, and after the graphene falls into the space between the two compression rollers from the blanking hopper, the graphene is rolled to form a graphene film substrate.
Be equipped with agitating unit in the blanking fill and place graphite alkene and pile up, two compression roller bottoms are equipped with draw gear, and draw gear is horizontal installation's conveyer belt, and the forward speed of conveyer belt is the same with the slew velocity of graphite alkene film substrate, and this speed (m/s) equals compression roller rotational speed (rpm) compression roller girth (m).
In the step 3), the curtain coating slurry is prepared by mixing graphene and carbon nanotubes.
And 4) coating the slurry on the few-layer porous graphene film, and then carrying out extrusion forming in a heating box through two heated press rollers, wherein the temperature in the heating box is 30-50 ℃, and the drying time is 5-10 minutes.
The number of layers of the heat conduction net is at least five, the thickness of the heat conduction net layer is 10-80 mu m, the number of stacked layers of the few-layer porous graphene films is multiple, and the thickness of the film gasket formed by compounding the few-layer porous graphene films and the film-based heat conduction net vertically arranged on the few-layer porous graphene film base material is 1.0 mm.
And finally, compounding the few-layer porous graphene film in the heat conduction gasket and the graphene-carbon nanotube film-based heat conduction net vertically arranged on the few-layer porous graphene film substrate, wherein the thickness of the compounded few-layer porous graphene film is 1.8mm, and the heat conduction coefficient of the heat conduction gasket is 278.6W/(m.K).
EXAMPLE five
The invention provides a technical scheme that: a production process of a high-thermal-conductivity flexible graphene film gasket comprises the following process steps of:
1) screening the graphene by a sieve;
2) rolling the graphene with the sieved sieve by a roller press to prepare a graphene film;
3) preparing a curtain coating slurry, and coating the curtain coating slurry on the few-layer porous graphene film through a curtain coating machine;
4) and coating the slurry on the few-layer porous graphene film, and then performing roll forming and drying to form a vertically and horizontally interwoven film heat-conducting net vertical to the few-layer porous graphene film, thereby compounding and forming the high-heat-conductivity flexible graphene film gasket.
In the step 1), the graphene is a few-layer porous graphene without adding a flexible high polymer material, the graphene is screened by a 100-mesh and 200-mesh sieve, and the thickness of a substrate of the few-layer porous graphene is 10 nm-50 μm.
In step 2), during roll-in molding, graphene is located in the blanking hopper, a pair of parallel and level installed compression rollers are arranged below the blanking hopper, the diameters of the compression rollers are the same and rotate in opposite directions, the pressure of the compression rollers is 3000-9000N, 5-60rpm, and after the graphene falls into the space between the two compression rollers from the blanking hopper, the graphene is rolled to form a graphene film substrate.
Be equipped with agitating unit in the blanking fill and place graphite alkene and pile up, two compression roller bottoms are equipped with draw gear, and draw gear is horizontal installation's conveyer belt, and the forward speed of conveyer belt is the same with the slew velocity of graphite alkene film substrate, and this speed (m/s) equals compression roller rotational speed (rpm) compression roller girth (m).
In the step 3), the curtain coating slurry is prepared by mixing graphene and carbon nanotubes.
And 4) coating the slurry on the few-layer porous graphene film, and then carrying out extrusion forming in a heating box through two heated press rollers, wherein the temperature in the heating box is 30-50 ℃, and the drying time is 5-10 minutes.
The number of layers of the heat conduction net is at least five, the thickness of the heat conduction net layer is 10-80 mu m, the number of stacked layers of the few-layer porous graphene films is multiple, and the thickness of the film gasket formed by compounding the few-layer porous graphene films and the film-based heat conduction net vertically arranged on the few-layer porous graphene film base material is 1.0 mm.
And finally, compounding the few-layer porous graphene film in the heat conduction gasket and compounding the graphene-carbon nanotube film-based heat conduction net vertically arranged on the few-layer porous graphene film substrate to form the heat conduction gasket, wherein the thickness of the heat conduction gasket is 0.8mm, and the heat conduction coefficient of the heat conduction gasket is 396.1W/(m.K).
Examples one to five provide a schematic structural diagram of a few-layer porous graphene as shown in fig. 1, and a few-layer (5-7 layers) porous graphene thin film as shown in fig. 2.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A production process of a high-thermal-conductivity flexible graphene film gasket comprises a few-layer porous graphene film and a film-based heat conduction net vertically arranged on a few-layer porous graphene film substrate, and is characterized by comprising the following process steps:
1) screening the graphene by a sieve;
2) rolling the graphene with the sieved sieve by a roller press to prepare a graphene film;
3) preparing a curtain coating slurry, and coating the curtain coating slurry on the few-layer porous graphene film through a curtain coating machine;
4) and coating the slurry on the few-layer porous graphene film, and then performing roll forming and drying to form a vertically and horizontally interwoven film heat-conducting net vertical to the few-layer porous graphene film, thereby compounding and forming the high-heat-conductivity flexible graphene film gasket.
2. The production process of the high-thermal-conductivity flexible graphene film gasket according to claim 1, characterized in that: in the step 1), the graphene is a few-layer porous graphene without adding a flexible polymer material, the graphene is screened by a 100-mesh 200-mesh sieve, and the thickness of the substrate of the few-layer porous graphene is 10nm to 50 μm, such as 10nm, 20nm, 1 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm or 50 μm, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable.
3. The production process of the high-thermal-conductivity flexible graphene film gasket according to claim 1, characterized in that: in step 2), during roll-in molding, graphene is located in the blanking hopper, a pair of parallel and level installed compression rollers are arranged below the blanking hopper, the diameters of the compression rollers are the same and rotate in opposite directions, the pressure of the compression rollers is 3000-9000N, 5-60rpm, and after the graphene falls into the space between the two compression rollers from the blanking hopper, the graphene is rolled to form a graphene film substrate.
4. The production process of the high-thermal-conductivity flexible graphene film gasket according to claim 3, characterized in that: the graphene film production device is characterized in that a stirring device is arranged in the blanking hopper and used for placing graphene to be stacked, a traction device is arranged at the bottom of each of the two compression rollers and is a horizontally installed conveying belt, the advancing speed of the conveying belt is the same as the descending speed of a graphene film base material, and the speed (m/s) is equal to the rotation speed (rpm) of the compression rollers plus the circumference (m) of the compression rollers.
5. The production process of the high-thermal-conductivity flexible graphene film gasket according to claim 1, characterized in that: in the step 3), the curtain coating slurry is prepared from one or more of graphene, carbon nanotubes and carbon fibers.
6. The production process of the high-thermal-conductivity flexible graphene film gasket according to claim 1, characterized in that: and 4) coating the slurry on the few-layer porous graphene film, and then carrying out extrusion forming in a heating box through two heated press rollers, wherein the temperature in the heating box is 30-50 ℃, and the drying time is 5-10 minutes.
7. The production process of the high-thermal-conductivity flexible graphene film gasket according to claim 1, characterized in that: the number of the heat-conducting net layers is at least five, the thickness of the heat-conducting net layer is 10-80 μm, such as 10 μm, 20 μm, 30 μm, 40 μm, 50 μm or 80 μm, but not limited to the cited values, other values not listed in the numerical range are also applicable, the number of the stacked layers of the few-layer porous graphene film is multiple, and the number of the stacked layers of the few-layer porous graphene film may be 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 or 100, but not limited to the cited values, and the thickness of the film pad after the combination of the few-layer porous graphene film and the film-based heat-conducting net vertically arranged on the few-layer porous graphene film substrate is 0.05-2.0 mm, such as 0.05mm, 0.08mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.65mm, 0.55mm, 0.7mm, 0.75mm, 0.0.0.0.0.0.0 mm, 8mm, 0.85mm, 0.9mm, 1.0mm, 1.05mm, 1.1mm, 1.2mm, 1.5mm or 2.5mm, etc., but is not limited to the recited values, and other values not recited within the range of values are also applicable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910941740.8A CN110589810A (en) | 2019-09-30 | 2019-09-30 | Production process of high-thermal-conductivity flexible graphene film gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910941740.8A CN110589810A (en) | 2019-09-30 | 2019-09-30 | Production process of high-thermal-conductivity flexible graphene film gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110589810A true CN110589810A (en) | 2019-12-20 |
Family
ID=68865222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910941740.8A Withdrawn CN110589810A (en) | 2019-09-30 | 2019-09-30 | Production process of high-thermal-conductivity flexible graphene film gasket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110589810A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105542728A (en) * | 2016-01-24 | 2016-05-04 | 北京大学 | Method for preparing vertical orientation graphene sheet/high polymer thermal interface material |
| CN106276870A (en) * | 2016-07-27 | 2017-01-04 | 中国工程物理研究院激光聚变研究中心 | The preparation method of the pure carbon compound film of graphene carbon nanotube |
| CN109659096A (en) * | 2018-12-27 | 2019-04-19 | 中国科学院山西煤炭化学研究所 | A method of preparing graphene conductive film |
-
2019
- 2019-09-30 CN CN201910941740.8A patent/CN110589810A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105542728A (en) * | 2016-01-24 | 2016-05-04 | 北京大学 | Method for preparing vertical orientation graphene sheet/high polymer thermal interface material |
| CN106276870A (en) * | 2016-07-27 | 2017-01-04 | 中国工程物理研究院激光聚变研究中心 | The preparation method of the pure carbon compound film of graphene carbon nanotube |
| CN109659096A (en) * | 2018-12-27 | 2019-04-19 | 中国科学院山西煤炭化学研究所 | A method of preparing graphene conductive film |
Non-Patent Citations (3)
| Title |
|---|
| DONGMEI HU ET AL.: "Strong graphene-interlayered carbon nanotube films with high thermal conductivity", 《CARBON》 * |
| DONGMEI HU ET AL.: "Ultrastrong and excellent dynamic mechanical properties of carbon nanotube composites", <COMPOSITES SCIENCE AND TECHNOLOGY> * |
| 王鹿: "石墨烯基薄膜电极的制备及其电容去离子性能研究", 《万方学位论文》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106810876B (en) | Composite material with directionally arranged fillers and preparation method thereof | |
| CN106079693B (en) | A kind of graphene metal composite sheet material and preparation method thereof | |
| CN111235459B (en) | Preparation process method of low-melting-point alloy thermal interface material | |
| CN110589810A (en) | Production process of high-thermal-conductivity flexible graphene film gasket | |
| CN110027299A (en) | A kind of liquid crystal polymer high frequency double face copper and preparation method thereof and pressing device | |
| CN107355640A (en) | The method and vacuum heat-insulating plate of core material of vacuum heat insulation plate are prepared using glass fibre aggregation leftover pieces | |
| CN106852098A (en) | Ultra-thin conductive radiating foam and preparation method | |
| Ma et al. | Lightweight and high-strength GMT/PEFP/GNP composites with absorb-dominated electromagnetic interference shielding property | |
| Huang et al. | Lightweight and textured Ni@ Cu-encapsulated carbon tube with outstanding electromagnetic interference shielding performance | |
| CN103906418A (en) | Cooling fin and manufacturing method thereof | |
| CN206547250U (en) | A kind of radiating graphite flake with electro-magnetic screen function | |
| Yang et al. | Constructing 3D expanded graphite-silver segregated network structure for ultra-efficient EMI shielding and low reflection | |
| CN207825672U (en) | A kind of sandwich structure aeroge composite thermal insulation article production line | |
| CN105437641A (en) | Artificial graphite/copper composite radiating fin and preparation method therefor | |
| CN107081953A (en) | A kind of laminating apparatus for heat conduction foam piece | |
| CN215121660U (en) | Heat-conducting and electric-conducting wrapping foam | |
| CN104329540A (en) | Vacuum insulated panel with high barrier bag without edge coating | |
| CN105965623A (en) | Heat conducting cushioning pressure pad of hot press | |
| CN112126197A (en) | Preparation method of alternating multilayer epoxy resin-based conductive composite microporous foam material | |
| CN203884122U (en) | radiating fin structure and radiating shell | |
| CN106590003A (en) | Shading material for display device | |
| CN111087678A (en) | Conductive foam EVA material and preparation method thereof | |
| CN208068335U (en) | A kind of foamed cotton slicing device that dicing effect is good | |
| Kang et al. | Cellulose-derived flexible carbonized paper for high-performance electromagnetic interference shielding | |
| CN205793612U (en) | TD antenna plate is with high PIM value microwave base plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191220 |
|
| WW01 | Invention patent application withdrawn after publication |