CN107756986A - A kind of graphene heat dissipation film and preparation method thereof - Google Patents
A kind of graphene heat dissipation film and preparation method thereof Download PDFInfo
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- CN107756986A CN107756986A CN201710755077.3A CN201710755077A CN107756986A CN 107756986 A CN107756986 A CN 107756986A CN 201710755077 A CN201710755077 A CN 201710755077A CN 107756986 A CN107756986 A CN 107756986A
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Abstract
The present invention relates to a kind of graphene heat dissipation film and preparation method thereof, the graphene heat dissipation film includes some graphene layers and base layer being staggered, and is adhesively fixed between the graphene layer and base layer by adhesive layer.The thickness of the graphene layer is 1 50 μm, and the thickness of described matrix layer is 1 100 μm.Graphene layer is pure graphene layer in the heat dissipation film of the present invention, greatly improves the heat conductivility of material；Meanwhile the method for the invention production technology is easy, application is strong, can be mass-produced.
Description
Technical field
The present invention relates to field of nanocomposite materials, and in particular to a kind of graphene heat dissipation film and preparation method thereof.
Background technology
Graphene shows its excellent performance in terms of thermodynamics, from that time of its birth, for individual layer
The measurement problem of graphene thermal conductivity just enjoys the concern of people always.The carbon atom of individual layer is entered from the angle of molecular physics
The simulation that row phonon is propagated, obtained graphene average conduction is 6000W/ (mK), is measured in the lab with 3 Ω methods
Graphene thermal conductivity is also up to (5000-5500) W/ (mK), and the thermal conductivity of high-efficiency heat conduction material copper is in nature
386.4W/ (m.k), silver-colored thermal conductivity are 429W/ (mK), and diamond is 1300-2400W/ (mK).It can be seen that graphene
It was found that and the measure to its thermal conductivity factor, heat transfer educational circles cause very big vibrations.Graphene is as at present in the world
Know the material that heat conductivility is best in material, represent the future of whole heat transfer subject and field of heat transfer.At present, to graphene
Research still among progress like a raging fire, people by its properity, prepare etc. further investigated, directly
The arrival in graphene volume production epoch has been promoted, has utilized the superhigh intensity and toughness, the conduction of superelevation and thermal conductivity of graphene at that time
The product that can be worked it out can necessarily bring once new technological revolution.
In general graphene Heat Conduction Material be all add resin or polymer to improve its adhesive force, film forming make it more
Practicality, but the heat conductivility of graphene can be reduced by adding resin or polymer.Present invention employs pure Graphene powder to be not added with
The mode of itself and metal rolling is prepared graphene-metallic composite by any resin or polymer, because graphene layer is free of
Other materials, improve the hot property of graphene-metal sheet to greatest extent, while to assign the Heat Conduction Material again good for metal level
Toughness and machinability.
The content of the invention
It is an object of the invention to provide a kind of graphene heat dissipation film and preparation method thereof, is not added in graphene layer any
Material, it ensure that the thermal conductivity of graphene.
The invention provides a kind of graphene heat dissipation film, the graphene heat dissipation film includes some graphenes being staggered
Layer and base layer, are adhesively fixed between the graphene layer and base layer by adhesive layer.The thickness of the graphene layer is 1-
50 μm, the thickness of described matrix layer is 1-100 μm.
Further, described matrix layer is one kind in silver, aluminium, copper.
Further, the graphene layer is graphene powder.
Further, the quantity of the graphene layer is 1-5, and the quantity of described matrix layer is 1-5.
Another aspect of the present invention provides a kind of preparation method of graphene heat dissipation film, comprises the following steps：
(1) native graphite is mixed with acid solution, stirring at normal temperature 5min；Catalyst and expansion intercalator are successively added,
After continuing 5~10min of stirring, reaction 5min~1h is stored at room temperature, obtains graphene presoma；Graphene presoma water is more
Secondary flushing, it is subsequently placed in ultrasound in ultrasonic wave and peels off 5min~1h, obtain graphene dispersing solution；At graphene dispersing solution centrifugation
Reason, obtains primary graphene, and primary graphene is washed to multiple, then progress In-situ condensation drying, stone is obtained after moisture of going out
Black alkene powder；
(2) metal material that selection thickness is 1-100 μm coats as base layer on clean metal material matrix surface
For one layer of heat-conducting glue as adhesive layer, coating thickness is 1-50 μm；
(3) particle diameter is placed in the feed bin of cloth powder machine for the graphene powder of 50-5000 mesh, with cloth powder machine through step
(2) what is prepared obtains the uniform cloth graphene bisque of one side of metal material gluing, and the metal material after cloth powder is sent into rolling
Equipment is pressed, pressure 50-150 tons, linear velocity 5-10m/min, and graphene layer is depressed into thickness for 1-50 μm, obtains graphite
Alkene heat dissipation film；
(4) induced by magnetic field change graphene orientation.
Further, multiple circulation step (2) and step (3), cycle-index 1-4 before step (4).
Beneficial effect using the invention described above technical scheme is：
Graphene layer is pure graphene layer in the heat dissipation film of the present invention, greatly improves the heat conductivility of material；Meanwhile
The method of the invention production technology is easy, and application is strong, can be mass-produced；The inventive method sets up induced by magnetic field finally
Step, change graphene are orientated, and further increase the thermal conductance of heat dissipation film.
Embodiment
, below will be in the embodiment of the present invention to make the purpose, technical scheme and advantage of the embodiment of the present invention clearer
Technical scheme be clearly and completely described, it is clear that described embodiment is part of the embodiment of the present invention, rather than
Whole embodiments.
Graphene heat dissipation film of the present invention includes some graphene layers and base layer being staggered, the graphene layer and base
It is adhesively fixed between body layer by adhesive layer.The thickness of the graphene layer is 1-50 μm, and the thickness of described matrix layer is 1-100
μm, wherein, described matrix layer is one kind in silver, aluminium, copper, and the graphene layer is graphene powder, the graphene layer
Quantity is 1-5, and the quantity of described matrix layer is 1-5.
Embodiment 1
The preparation method of graphene heat dissipation film, comprises the following steps：
(1) native graphite is mixed with acid solution, stirring at normal temperature 5min；Catalyst and expansion intercalator are successively added,
Continue after stirring 5min, be stored at room temperature reaction 5min, obtain graphene presoma；Graphene presoma is repeatedly rinsed with water,
It is subsequently placed in ultrasound in ultrasonic wave and peels off 5min, obtains graphene dispersing solution；By graphene dispersing solution centrifugal treating, primary is obtained
Graphene, primary graphene is washed to multiple, then progress In-situ condensation drying, graphene powder is obtained after moisture of going out；
(2) aluminium foil that selection thickness is 1-100 μm coats one layer as base layer on clean metal material matrix surface
For heat-conducting glue as adhesive layer, coating thickness is 1-50 μm；
(3) particle diameter is placed in the feed bin of cloth powder machine for the graphene powder of 50-5000 mesh, with cloth powder machine through step
(2) what is prepared obtains the uniform cloth graphene bisque of one side of metal material gluing, and the metal material after cloth powder is sent into rolling
Equipment is pressed, pressure 50-150 tons, linear velocity 5-10m/min, and graphene layer is depressed into thickness for 1-50 μm, obtains graphite
Alkene heat dissipation film；
(4) induced by magnetic field change graphene orientation.
Further, multiple circulation step (2) and step (3), cycle-index 1-4 before step (4).
Embodiment 2
The preparation method of graphene heat dissipation film, comprises the following steps：
(1) native graphite is mixed with acid solution, stirring at normal temperature 5min；Catalyst and expansion intercalator are successively added,
Continue after stirring 5min, be stored at room temperature reaction 1h, obtain graphene presoma；Graphene presoma is repeatedly rinsed with water, so
After be placed in ultrasonic wave ultrasound and peel off 1h, obtain graphene dispersing solution；By graphene dispersing solution centrifugal treating, primary graphite is obtained
Alkene, primary graphene is washed to multiple, then progress In-situ condensation drying, graphene powder is obtained after moisture of going out；
(2) copper foil that selection thickness is 1-100 μm coats one layer as base layer on clean metal material matrix surface
For heat-conducting glue as adhesive layer, coating thickness is 1-50 μm；
(3) particle diameter is placed in the feed bin of cloth powder machine for the graphene powder of 50-5000 mesh, with cloth powder machine through step
(2) what is prepared obtains the uniform cloth graphene bisque of one side of metal material gluing, and the metal material after cloth powder is sent into rolling
Equipment is pressed, pressure 50-150 tons, linear velocity 5-10m/min, and graphene layer is depressed into thickness for 1-50 μm, obtains graphite
Alkene heat dissipation film；
(4) multiple circulation step (2) and step (3), cycle-index 2
(5) induced by magnetic field change graphene orientation.
Embodiment 3
The preparation method of graphene heat dissipation film, comprises the following steps：
(1) native graphite is mixed with acid solution, stirring at normal temperature 5min；Catalyst and expansion intercalator are successively added,
Continue after stirring 5min, be stored at room temperature reaction 1h, obtain graphene presoma；Graphene presoma is repeatedly rinsed with water, so
After be placed in ultrasonic wave ultrasound and peel off 1h, obtain graphene dispersing solution；By graphene dispersing solution centrifugal treating, primary graphite is obtained
Alkene, primary graphene is washed to multiple, then progress In-situ condensation drying, graphene powder is obtained after moisture of going out；
(2) silver foil that selection thickness is 1-100 μm coats one layer as base layer on clean metal material matrix surface
For heat-conducting glue as adhesive layer, coating thickness is 1-50 μm；
(3) particle diameter is placed in the feed bin of cloth powder machine for the graphene powder of 50-5000 mesh, with cloth powder machine through step
(2) what is prepared obtains the uniform cloth graphene bisque of one side of metal material gluing, and the metal material after cloth powder is sent into rolling
Equipment is pressed, pressure 50-150 tons, linear velocity 5-10m/min, and graphene layer is depressed into thickness for 1-50 μm, obtains graphite
Alkene heat dissipation film；
(4) multiple circulation step (2) and step (3), cycle-index 2
(5) induced by magnetic field change graphene orientation.
Following table is the thermal conductivity of graphene doping metals composite sheet obtained by embodiment 1-3, and the method for testing of thermal conductivity is
Laser shines method：
| Thermal conductivity (W/m.k) | |
| Embodiment 1 | 615.62 |
| Embodiment 2 | 653.58 |
| Embodiment 3 | 687.54 |
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (6)
1. a kind of graphene heat dissipation film, it is characterised in that the graphene heat dissipation film includes some graphene layers being staggered
And base layer, it is adhesively fixed between the graphene layer and base layer by adhesive layer.The thickness of the graphene layer is 1-50 μ
M, the thickness of described matrix layer is 1-100 μm.
2. graphene heat dissipation film according to claim 1, it is characterised in that described matrix layer is one in silver, aluminium, copper
Kind.
3. graphene heat dissipation film according to claim 1, it is characterised in that the graphene layer is graphene powder.
4. graphene heat dissipation film according to claim 1, it is characterised in that the quantity of the graphene layer is 1-5, described
The quantity of base layer is 1-5.
5. according to the preparation method of graphene heat dissipation film described in claim 1-4, it is characterised in that comprise the following steps：
(1) native graphite is mixed with acid solution, stirring at normal temperature 5min；Catalyst and expansion intercalator are successively added, is continued
After stirring 5~10min, reaction 5min~1h is stored at room temperature, obtains graphene presoma；Graphene presoma is repeatedly rushed with water
Wash, be subsequently placed in ultrasound in ultrasonic wave and peel off 5min~1h, obtain graphene dispersing solution；By graphene dispersing solution centrifugal treating,
Primary graphene is obtained, primary graphene is washed to multiple, then progress In-situ condensation drying, graphene is obtained after moisture of going out
Powder；
(2) metal material that selection thickness is 1-100 μm coats one layer as base layer on clean metal material matrix surface
For heat-conducting glue as adhesive layer, coating thickness is 1-50 μm；
(3) particle diameter is placed in the feed bin of cloth powder machine for the graphene powder of 50-5000 mesh, made with cloth powder machine through step (2)
The uniform cloth graphene bisque of the standby one side for obtaining metal material gluing, the metal material after cloth powder is sent into roll unit and entered
Row pressing, pressure 50-150 tons, linear velocity 5-10m/min, graphene layer is depressed into thickness as 1-50 μm, obtains graphene radiating
Film；
(4) induced by magnetic field change graphene orientation.
6. the preparation method of graphene heat dissipation film according to claim 5, it is characterised in that before step (4) repeatedly
Circulation step (2) and step (3), cycle-index 1-4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710755077.3A CN107756986A (en) | 2017-08-29 | 2017-08-29 | A kind of graphene heat dissipation film and preparation method thereof |
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| CN201710755077.3A CN107756986A (en) | 2017-08-29 | 2017-08-29 | A kind of graphene heat dissipation film and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113233875A (en) * | 2021-04-26 | 2021-08-10 | 广东工业大学 | Flexible high-electric-conductivity heat-conduction ceramic-based composite film and preparation method thereof |
| CN114873587A (en) * | 2022-06-08 | 2022-08-09 | 安徽宇航派蒙健康科技股份有限公司 | Graphene heat-conducting film and preparation method thereof |
-
2017
- 2017-08-29 CN CN201710755077.3A patent/CN107756986A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113233875A (en) * | 2021-04-26 | 2021-08-10 | 广东工业大学 | Flexible high-electric-conductivity heat-conduction ceramic-based composite film and preparation method thereof |
| CN114873587A (en) * | 2022-06-08 | 2022-08-09 | 安徽宇航派蒙健康科技股份有限公司 | Graphene heat-conducting film and preparation method thereof |
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Application publication date: 20180306 |