CN117337007A - Graphene radiator - Google Patents
Graphene radiator Download PDFInfo
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- CN117337007A CN117337007A CN202311508067.1A CN202311508067A CN117337007A CN 117337007 A CN117337007 A CN 117337007A CN 202311508067 A CN202311508067 A CN 202311508067A CN 117337007 A CN117337007 A CN 117337007A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 56
- 229910052751 metal Inorganic materials 0.000 claims abstract description 117
- 239000002184 metal Substances 0.000 claims abstract description 117
- 239000004033 plastic Substances 0.000 claims abstract description 67
- 229920003023 plastic Polymers 0.000 claims abstract description 67
- 239000010410 layer Substances 0.000 claims abstract description 43
- 239000012782 phase change material Substances 0.000 claims abstract description 27
- 230000017525 heat dissipation Effects 0.000 claims abstract description 21
- 239000002131 composite material Substances 0.000 claims abstract description 13
- 239000007769 metal material Substances 0.000 claims abstract description 13
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 239000011247 coating layer Substances 0.000 claims abstract description 4
- 239000000945 filler Substances 0.000 claims description 41
- 238000010438 heat treatment Methods 0.000 claims description 28
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 22
- 229920000098 polyolefin Polymers 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 18
- 238000000465 moulding Methods 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000005266 casting Methods 0.000 claims description 9
- 238000000748 compression moulding Methods 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000000741 silica gel Substances 0.000 claims description 9
- 229910002027 silica gel Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 229920001903 high density polyethylene Polymers 0.000 claims description 3
- 239000004700 high-density polyethylene Substances 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 4
- 238000002360 preparation method Methods 0.000 abstract description 6
- 229910002804 graphite Inorganic materials 0.000 abstract description 5
- 239000010439 graphite Substances 0.000 abstract description 5
- -1 graphite alkene Chemical class 0.000 abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000005855 radiation Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010112 shell-mould casting Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- H05K7/20409—Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The application discloses a graphene radiator, and relates to the technical field of radiators; comprises a heat dissipation main body; the heat dissipation main body comprises a base part and a fin part; the heat dissipation main body is sequentially provided with a plastic bracket layer, a filling layer, a metal layer and an outer coating layer from inside to outside; the plastic support layer is made of composite heat-conducting plastic, the filling layer is made of phase change material, the metal layer is made of heat-conducting metal material, and the outer coating is a graphene layer; the application also provides a preparation method for preparing the graphene radiator; adopt the technical scheme that this application provided effectively to promote the radiating efficiency of graphite alkene radiator.
Description
Technical Field
The application relates to the technical field of heat dissipation engineering, in particular to a graphene radiator and a preparation method thereof.
Background
Heat dissipation is an inexhaustible topic in the modern industrial age. With the development of miniaturization, light weight and high power of various devices, the heat generated by unit area is larger and larger, and the requirement on the heat dissipation efficiency of the radiator is gradually increased.
The heat radiator is generally composed of a tubular or plate-type substrate for collecting heat and large-area radiating fins (also called fins) with various structures, the heat on a heating device is led into the heat radiator substrate in a heat conduction mode during operation, and then is led into the fins mainly in the heat conduction mode, and then the heat on the fins is led out to surrounding environment media in a heat convection and heat radiation mode, so that the purpose of radiating heat can be achieved in a continuous process, and a device or instrument capable of timely transferring the generated heat to avoid thermal runaway is called a heat radiator.
With the development of new materials in recent years, the heat dissipation efficiency of the heat sink is also improved to a new stage, such as graphene materials; however, most of the conventional graphene and radiator combined application is on the surface layer, such as coating technology to adhere the graphene to the metal layer; which has some problems as follows. The first method of coating generally needs to be matched with a certain amount of adhesive to improve the adhesion effect of the graphene, and most of the adhesive has certain heat resistance, so that the heat dissipation performance of the graphene can not be fully exerted to a certain extent; secondly, the heat conduction performance of the traditional metal layer and graphene mode still has a certain upper limit, so that a certain improvement space exists.
Disclosure of Invention
The application aims to provide a graphene radiator and a preparation method thereof, so as to solve at least one technical problem.
In order to solve the technical problems, the application provides a graphene radiator and a preparation method thereof, and in a first aspect, the application provides the graphene radiator which comprises a radiating main body; the heat dissipation main body comprises a base part and a fin part;
the heat dissipation main body is sequentially provided with a plastic bracket layer, a filling layer, a metal layer and an outer coating layer from inside to outside;
the plastic support layer is made of composite heat-conducting plastic, the filling layer is made of phase change material, the metal layer is made of heat-conducting metal material, and the outer coating is a graphene layer.
Preferably, the composite heat-conducting plastic comprises graphene filler and polyolefin filler; the ratio of the graphene filler to the polyolefin filler is (1.2-2): 1.
preferably, the phase change material comprises high density polyethylene, paraffin wax, polyethylene glycol.
In a second aspect, the present application provides a method for preparing a graphene heat sink, including the steps of:
s1, casting a metal material to form a hollow metal shell, placing the metal shell in a vacuum high-temperature oven, introducing protective gas to heat to 800-1000 ℃, then introducing methane, heating for 15-25min at 800-1000 ℃, and then standing in the high-temperature oven until the temperature is reduced to room temperature, wherein the metal shell comprises a base part and a fin part, and an opening is formed in the base part;
s2, taking graphene filler and polyolefin filler (1.2-2): 1, and performing compression molding at 230-240 ℃ to form a plastic bracket after molding, wherein the plastic bracket comprises a base part machine fin part and is matched with the shape of a metal shell;
s3, the plastic support is arranged in the metal shell, the phase change material is poured into a gap between the metal shell and the plastic support, a silica gel gasket is arranged at an opening of the metal shell to seal, and then the metal shell is placed in a vacuum oven to be heated.
Preferably, the metal layer is made of metallic copper or metallic aluminum.
Preferably, the shielding gas is one of nitrogen, helium or argon.
Preferably, the ratio of the graphene filler to the polyolefin filler is 1.6:1.
preferably, in step S3, the heating temperature is 75-85 ℃ and the heating time is 18-20h.
Compared with the prior art, the beneficial effect of this application lies in:
(1) In the high-temperature methane environment, the graphene layer is promoted to be attached to the outer surface of the metal shell, so that the attaching effect of the graphene is better, in addition, the addition of materials such as an adhesive is reduced, the heat of the metal layer can be directly conducted through the graphene layer, the heat-blocking influence of heat-blocking substances is further reduced, and the heat dissipation efficiency is improved;
(2) The plastic bracket is prepared by taking graphene filler as a main material, and the formed plastic bracket is matched with the overall shape of the radiator, so that uniform heat dissipation is better realized, and the plastic bracket takes graphene as a main raw material and has excellent heat conduction performance;
(3) The composite heat-conducting plastic is used as an inner core main body, the metal is used as an outer shell, the phase change material is arranged between the composite heat-conducting plastic and the outer shell, the plastic bracket provides a good attachment point for the phase change material, and the composite heat-conducting plastic and the plastic bracket are matched to further improve the comprehensive heat dissipation performance of the radiator; in the heat conduction process of the radiator, the phase change material can realize rapid heat absorption through the conversion of the physical state of the phase change material, so that the heat radiation efficiency is improved; in addition, this scheme further sets up the graphite alkene layer in the metal level outside, through graphite alkene and metal level cooperation, promotes the radiating efficiency of metal level.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic overall structure of one embodiment of the present application;
FIG. 2 is a schematic view of a portion of one embodiment of the present application;
FIG. 3 is a flow chart of a method of preparation according to one embodiment of the present application;
wherein: 11. a fin section; 12. a base portion; 13. a plastic support layer; 14. a filling layer; 15. a metal layer; 16. an outer coating.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In the description of the present application, it should be understood that the terms "upper," "lower," "side," "front," "rear," and the like indicate an orientation or positional relationship based on installation, and are merely for convenience of description of the present application and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
In the description of the present application, it should be noted that the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone.
It should be further noted that, in the embodiments of the present application, the same reference numerals denote the same components or the same parts, and for the same parts in the embodiments of the present application, reference numerals may be given to only one of the parts or the parts in the drawings by way of example, and it should be understood that, for other same parts or parts, the reference numerals are equally applicable.
For a further understanding of the invention, features and efficacy of this application, the following examples are set forth to illustrate, together with the drawings, the detailed description of which follows:
referring to fig. 1-2, the present application provides a graphene heat spreader, including a heat dissipating body; the heat dissipation main body comprises a base part and a fin part;
it can be appreciated that the graphene radiator provided by the application is similar to a traditional radiator in general shape, wherein the base part can be abutted against the heat generating source, and the fin part is in a shape for increasing the heat radiating area.
Specifically, the heat dissipation main body is sequentially provided with a plastic bracket layer, a filling layer, a metal layer and an outer coating layer from inside to outside;
the plastic support layer is made of composite heat-conducting plastic, the filling layer is made of phase change material, the metal layer is made of heat-conducting metal material, and the outer coating is a graphene layer;
it can be understood that the scheme takes the composite heat-conducting plastic as an inner core main body, takes metal as an outer shell, and sets a phase change material between the composite heat-conducting plastic and the outer shell, and the plastic bracket provides a better attachment point for the phase change material, and simultaneously, the combination of the composite heat-conducting plastic and the outer shell can further improve the comprehensive heat dissipation performance of the radiator; in the heat conduction process of the radiator, the phase change material can realize rapid heat absorption through the conversion of the physical state of the phase change material, so that the heat radiation efficiency is improved; in addition, this scheme further sets up the graphite alkene layer in the metal level outside, through graphite alkene and metal level cooperation, promotes the radiating efficiency of metal level.
Further, in some embodiments, the composite thermally conductive plastic includes a graphene filler, a polyolefin filler;
further, the ratio of the graphene filler to the polyolefin filler is (1.2-2): 1.
further, the phase change material comprises high density polyethylene, paraffin wax and polyethylene glycol.
The application also provides a preparation method of the graphene radiator, which comprises the following steps:
s1, casting a metal material to form a hollow metal shell, placing the metal shell in a vacuum high-temperature oven, introducing protective gas to heat to 800-1000 ℃, then introducing methane, heating for 15-25min at 800-1000 ℃, and then standing in the high-temperature oven until the temperature is reduced to room temperature, wherein the metal shell comprises a base part and a fin part, and an opening is formed in the base part; the metal shell is cast into a hollow shape so as to realize the filling of the internal plastic support and the phase change material; the metal shell is preheated at a high temperature to reach 800-1000 ℃, and then methane is introduced, so that the graphene layer is adhered to the outer surface of the metal shell, and compared with a traditional coating mode, the graphene coating method provided by the application can enable the graphene to be better in adhering effect.
S2, taking graphene filler and polyolefin filler (1.2-2): 1, and performing compression molding at 230-240 ℃ to form a plastic bracket after molding, wherein the plastic bracket comprises a base part machine fin part and is matched with the shape of a metal shell; the plastic bracket is prepared by taking graphene filler as a main material, the shape of the formed plastic bracket is matched with the whole shape of the radiator, and even heat dissipation is better realized, and the plastic bracket takes graphene as a main raw material and has excellent heat conduction performance.
S3, the plastic support is arranged in the metal shell, the phase change material is poured into a gap between the metal shell and the plastic support, a silica gel gasket is arranged at an opening of the metal shell to seal, and then the metal shell is placed in a vacuum oven to be heated; pouring a phase change material between a gap between the plastic support and the metal shell, sealing and shaping through a silica gel gasket, heating in a vacuum oven, and enabling the phase change material to be adhered by taking the plastic support as an adhesion point, and after drying and heating are finished, firmly adhering the phase change material; sealing can be achieved by further pouring a metal layer at the opening.
In one embodiment, the metal layer is made of metallic copper or metallic aluminum; the metal copper and the metal aluminum have good heat radiation performance, and the upper limit of the heat radiation performance of the radiator can be improved when the graphene outer coating is matched.
In one embodiment, the shielding gas is one of nitrogen, helium or argon.
In one embodiment, the ratio of graphene filler to polyolefin filler is 1.6:1, a step of; it can be appreciated that the ratio of graphene filler to polyolefin filler affects the physicochemical and heat dissipation properties of the final plastic stent.
In one embodiment, in step S3, the heating temperature is 75-85deg.C and the heating time is 18-20h.
The following examples are given in detail, and it should be noted that they are not exhaustive of all possible scenarios, and that the materials used in the following examples are available commercially unless otherwise specified.
Example 1
S1, casting and molding a metal material to form a hollow metal shell, placing the metal shell in a vacuum high-temperature oven, introducing protective gas to heat to 1000 ℃, then introducing methane, heating for 20min at 1000 ℃, and then standing in the high-temperature oven until the temperature of the metal shell is reduced to room temperature, wherein the metal shell comprises a base part and a fin part, and an opening is formed in the base part;
s2, taking graphene filler and polyolefin filler according to the proportion of 1.2:1, and performing compression molding at 230-240 ℃ to form a plastic bracket after molding, wherein the plastic bracket comprises a base part machine fin part and is matched with the shape of a metal shell;
s3, the plastic support is arranged in the metal shell, the phase change material is poured into a gap between the metal shell and the plastic support, a silica gel gasket is arranged at an opening of the metal shell to seal, and then the metal shell is placed in a vacuum oven to be heated; the heating temperature is 80 ℃ and the heating time is 20h.
Wherein the metal shell adopts metal aluminum, and the shielding gas adopts nitrogen.
Example 2
S1, casting and molding a metal material to form a hollow metal shell, placing the metal shell in a vacuum high-temperature oven, introducing protective gas to heat to 1000 ℃, then introducing methane, heating for 20min at 1000 ℃, and then standing in the high-temperature oven until the temperature of the metal shell is reduced to room temperature, wherein the metal shell comprises a base part and a fin part, and an opening is formed in the base part;
s2, taking graphene filler and polyolefin filler according to the proportion of 1.6:1, and performing compression molding at 230-240 ℃ to form a plastic bracket after molding, wherein the plastic bracket comprises a base part machine fin part and is matched with the shape of a metal shell;
s3, the plastic support is arranged in the metal shell, the phase change material is poured into a gap between the metal shell and the plastic support, a silica gel gasket is arranged at an opening of the metal shell to seal, and then the metal shell is placed in a vacuum oven to be heated; the heating temperature is 85 ℃ and the heating time is 18h.
Wherein the metal shell adopts metal aluminum, and the shielding gas adopts nitrogen.
Example 3
S1, casting and molding a metal material to form a hollow metal shell, placing the metal shell in a vacuum high-temperature oven, introducing protective gas to heat to 1000 ℃, then introducing methane, heating for 20min at 1000 ℃, and then standing in the high-temperature oven until the temperature of the metal shell is reduced to room temperature, wherein the metal shell comprises a base part and a fin part, and an opening is formed in the base part;
s2, taking graphene filler and polyolefin filler to obtain a mixture of 2:1, and performing compression molding at 230-240 ℃ to form a plastic bracket after molding, wherein the plastic bracket comprises a base part machine fin part and is matched with the shape of a metal shell;
s3, the plastic support is arranged in the metal shell, the phase change material is poured into a gap between the metal shell and the plastic support, a silica gel gasket is arranged at an opening of the metal shell to seal, and then the metal shell is placed in a vacuum oven to be heated; the heating temperature is 75 ℃ and the heating time is 19h.
Wherein the metal shell adopts metal aluminum, and the shielding gas adopts nitrogen.
Comparative example 1
S1, casting and molding a metal material to form a hollow metal shell, placing the metal shell in a vacuum high-temperature oven, introducing protective gas to heat to 1000 ℃, then introducing methane, heating for 20min at 1000 ℃, and then standing in the high-temperature oven until the temperature of the metal shell is reduced to room temperature, wherein the metal shell comprises a base part and a fin part, and an opening is formed in the base part;
s2, taking graphene filler and polyolefin filler according to the proportion of 2.5:1, and performing compression molding at 230-240 ℃ to form a plastic bracket after molding, wherein the plastic bracket comprises a base part machine fin part and is matched with the shape of a metal shell;
s3, the plastic support is arranged in the metal shell, the phase change material is poured into a gap between the metal shell and the plastic support, a silica gel gasket is arranged at an opening of the metal shell to seal, and then the metal shell is placed in a vacuum oven to be heated; the heating temperature is 80 ℃ and the heating time is 20h.
Wherein the metal shell adopts metal aluminum, and the shielding gas adopts nitrogen.
Comparative example 2
S1, casting and molding a metal material to form a hollow metal shell, placing the metal shell in a vacuum high-temperature oven, introducing protective gas to heat to 1000 ℃, then introducing methane, heating for 20min at 1000 ℃, and then standing in the high-temperature oven until the temperature of the metal shell is reduced to room temperature, wherein the metal shell comprises a base part and a fin part, and an opening is formed in the base part;
s2, taking graphene filler and polyolefin filler according to the proportion of 1.0:1, and performing compression molding at 230-240 ℃ to form a plastic bracket after molding, wherein the plastic bracket comprises a base part machine fin part and is matched with the shape of a metal shell;
s3, the plastic support is arranged in the metal shell, the phase change material is poured into a gap between the metal shell and the plastic support, a silica gel gasket is arranged at an opening of the metal shell to seal, and then the metal shell is placed in a vacuum oven to be heated; the heating temperature is 80 ℃ and the heating time is 20h.
Wherein the metal shell adopts metal aluminum, and the shielding gas adopts nitrogen.
Comparative example 3
S1, casting and molding a metal material to form a hollow metal shell, placing the metal shell in a vacuum high-temperature oven, introducing protective gas to heat to 1000 ℃, then introducing methane, heating for 20min at 1000 ℃, and then standing in the high-temperature oven until the temperature of the metal shell is reduced to room temperature, wherein the metal shell comprises a base part and a fin part, and an opening is formed in the base part;
s2, taking graphene filler and polyolefin filler according to the proportion of 1.6:1, and filling the filler into a metal shell, and compression molding at 230-240 ℃ to form the radiator.
Wherein the metal shell adopts metal aluminum, and the shielding gas adopts nitrogen.
The heat sinks produced according to the above examples and comparative examples were further tested as follows: one surface of the testing device is a copper smooth heat release surface, the other surfaces are heat insulation surfaces, the heat flow adopts heated purified water, a water flow pressure head and flow are controlled, a base of the radiator is respectively in close contact with the heat release surface of the device through an assembly bolt, the flow is constant for water supply to the device, the temperature difference of water flow at an inlet and an outlet of the device within 5 minutes is measured, and the temperature difference represents the heat radiation capacity of the radiator. The specific test results are as follows:
| inlet temperature (. Degree. C.) | Outlet temperature (. Degree. C.) | Temperature difference (DEG C) | |
| Example 1 | 60 | 52.7 | 7.3 |
| Example 2 | 60 | 51.9 | 8.1 |
| Example 3 | 60 | 53.1 | 6.9 |
| Comparative example 1 | 60 | 55.9 | 4.1 |
| Comparative example 2 | 60 | 56.2 | 3.8 |
| Comparative example 3 | 60 | 56.6 | 3.4 |
It should be noted that, without conflict, the embodiments and features of the embodiments in the present application may be combined with each other.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the present application in any way, and any simple modification, equivalent variations and modification made to the above embodiments according to the technical principles of the present application are within the scope of the technical solutions of the present application.
Claims (8)
1. A graphene radiator is characterized in that: comprises a heat dissipation main body; the heat dissipation main body comprises a base part and a fin part;
the heat dissipation main body is sequentially provided with a plastic bracket layer, a filling layer, a metal layer and an outer coating layer from inside to outside;
the plastic support layer is made of composite heat-conducting plastic, the filling layer is made of phase change material, the metal layer is made of heat-conducting metal material, and the outer coating is a graphene layer.
2. The graphene heat sink of claim 1, wherein: the composite heat-conducting plastic comprises graphene filler and polyolefin filler; the ratio of the graphene filler to the polyolefin filler is (1.2-2): 1.
3. the graphene heat sink of claim 2, wherein: the phase change material comprises high-density polyethylene, paraffin wax and polyethylene glycol.
4. A method for preparing the graphene heat sink of claim 3, characterized in that: the method comprises the following steps:
s1, casting a metal material to form a hollow metal shell, placing the metal shell in a vacuum high-temperature oven, introducing protective gas to heat to 800-1000 ℃, then introducing methane, heating for 15-25min at 800-1000 ℃, and then standing in the high-temperature oven until the temperature is reduced to room temperature, wherein the metal shell comprises a base part and a fin part, and an opening is formed in the base part;
s2, taking graphene filler and polyolefin filler (1.2-2): 1, and performing compression molding at 230-240 ℃ to form a plastic bracket after molding, wherein the plastic bracket comprises a base part machine fin part and is matched with the shape of a metal shell;
s3, the plastic support is arranged in the metal shell, the phase change material is poured into a gap between the metal shell and the plastic support, a silica gel gasket is arranged at an opening of the metal shell to seal, and then the metal shell is placed in a vacuum oven to be heated.
5. The method of manufacturing according to claim 4, wherein: the metal layer is made of metallic copper or metallic aluminum.
6. The method of manufacturing according to claim 4, wherein: the shielding gas is one of nitrogen, helium or argon.
7. The method of manufacturing according to claim 4, wherein: the ratio of the graphene filler to the polyolefin filler is 1.6:1.
8. the method of manufacturing according to claim 4, wherein: in the step S3, the heating temperature is 75-85 ℃ and the heating time is 18-20h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311508067.1A CN117337007B (en) | 2023-11-14 | 2023-11-14 | Graphene radiator and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311508067.1A CN117337007B (en) | 2023-11-14 | 2023-11-14 | Graphene radiator and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764320A (en) * | 2019-01-11 | 2019-05-17 | 厦门大学 | A kind of phase transformation enhancing graphene plastic tank radiators and preparation method thereof |
| WO2023027661A1 (en) * | 2021-08-25 | 2023-03-02 | Ondokuz Mayis Universitesi Rektorlugu | New generation hybrid composite heat sink with monolithic metal foam form |
| CN115802704A (en) * | 2022-11-24 | 2023-03-14 | 平潭煜想时代科技有限公司 | Preparation method of novel rapid heat conduction assembly |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764320A (en) * | 2019-01-11 | 2019-05-17 | 厦门大学 | A kind of phase transformation enhancing graphene plastic tank radiators and preparation method thereof |
| WO2023027661A1 (en) * | 2021-08-25 | 2023-03-02 | Ondokuz Mayis Universitesi Rektorlugu | New generation hybrid composite heat sink with monolithic metal foam form |
| CN115802704A (en) * | 2022-11-24 | 2023-03-14 | 平潭煜想时代科技有限公司 | Preparation method of novel rapid heat conduction assembly |
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