CN211128729U - Graphene microsphere heat-conducting film and electronic product - Google Patents
Graphene microsphere heat-conducting film and electronic product Download PDFInfo
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- CN211128729U CN211128729U CN201921514434.8U CN201921514434U CN211128729U CN 211128729 U CN211128729 U CN 211128729U CN 201921514434 U CN201921514434 U CN 201921514434U CN 211128729 U CN211128729 U CN 211128729U
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Abstract
The utility model discloses a graphite alkene microballon heat-conducting membrane and electronic product, wherein, graphite alkene microballon heat-conducting membrane, be in including graphite alkene microballon heat-conducting layer and setting the double-sided adhesive layer of graphite alkene microballon heat-conducting layer upper surface and lower surface. The utility model provides a graphite alkene microballon heat-conducting layer has high horizontal coefficient of heat conductivity (1000-.
Description
Technical Field
The utility model discloses heat conduction diaphragm field especially relates to a graphite alkene microballon heat conduction membrane and electronic product.
Background
With the miniaturization of electronic devices, the increasing dominant frequency of chips, and the increasing enhancement of functions, the power consumption of a single chip is gradually increased, which results in the sharp increase of heat flux density. Studies have shown that over 55% of electronic equipment fails due to excessive temperatures, and thus the heat dissipation problem of electronic devices plays a significant role in the development of electronic devices.
The heat dissipation materials used at present are basically aluminum alloys, but the heat conductivity coefficient of aluminum is not high (237W/m.K), the heat conductivity of gold and silver copper is high, but the price is too high, and the weight of copper is large and the copper is easy to oxidize. The graphite material has the characteristics of high temperature resistance, light weight, high thermal conductivity, strong chemical stability, small thermal expansion coefficient and the like, can replace the traditional metal heat conduction material, is beneficial to miniaturization, microminiaturization and high power of electronic instruments and equipment, effectively lightens the weight of electronic elements and increases effective load. Although graphite has a very excellent horizontal thermal conductivity, the vertical thermal conductivity of graphite is very low (less than 40W/m · K), which affects the heat dissipation effect, and when the amount of heat generated is too large, the thermal conductivity is rather poor.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
In view of the not enough of above-mentioned prior art, the utility model aims at providing a graphite alkene microballon heat conduction membrane and electronic product aims at solving current heat conduction diaphragm problem with high costs, the radiating effect is relatively poor.
The technical scheme of the utility model as follows:
the utility model provides a graphite alkene microballon heat conduction membrane, wherein, includes graphite alkene microballon heat conduction layer and sets up the double-sided adhesive layer of graphite alkene microballon heat conduction layer upper surface and lower surface.
The graphene microsphere heat-conducting film is characterized in that a release paper layer is further arranged on the double-sided adhesive layer.
The graphene microsphere heat conduction membrane is characterized in that the graphene microsphere heat conduction layer is made of graphene microspheres.
The graphene microsphere heat-conducting film is characterized in that the diameter of each graphene microsphere is 1-10 um.
The graphene microsphere heat conduction membrane is characterized in that the thickness of the graphene microsphere heat conduction layer is 10-100 um.
The graphene microsphere heat-conducting film is characterized in that the thickness of the double-sided adhesive layer is 20-80 um.
An electronic product comprises a heating source and a radiating fin, wherein the graphene microsphere heat-conducting film is arranged between the heating source and the radiating fin.
The electronic product is one of a mobile phone, a notebook computer or a tablet.
Has the advantages that: the utility model provides a graphite alkene microballon heat conduction membrane includes graphite alkene microballon heat-conducting layer and sets up the double-sided adhesive layer of graphite alkene microballon heat-conducting layer upper surface and lower surface. The graphene microsphere heat conduction layer has extremely high horizontal heat conduction coefficient (1000-.
Drawings
Fig. 1 is a schematic structural view of a preferred embodiment of the graphene microsphere thermal conductive film of the present invention.
Detailed Description
The utility model provides a graphite alkene microballon heat conduction membrane and electronic product, for making the utility model discloses a purpose, technical scheme and effect are clearer, more clear and definite, and is following right the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Please refer to fig. 1, fig. 1 is a schematic structural diagram of a preferred embodiment of a graphene microsphere thermal conductive film according to the present invention, wherein, as shown in the figure, the graphene microsphere thermal conductive film includes a graphene microsphere thermal conductive layer 10 and a double-sided adhesive layer 20 disposed on the upper surface and the lower surface of the graphene microsphere thermal conductive layer 10, and a release paper layer 30 is further disposed on the double-sided adhesive layer 20.
In this embodiment, the graphene microsphere heat-conducting layer is made of graphene microspheres, the graphene microspheres have extremely high horizontal heat conductivity (1000-.
In some embodiments, the graphene microspheres are prepared by the following method: dispersing graphene oxide in a solvent to prepare a graphene oxide dispersion liquid; mixing the graphene oxide dispersion liquid with a template agent to prepare a composite material; and carrying out heat treatment on the composite material under a vacuum condition to prepare the graphene microsphere. In the embodiment, graphene oxide and a template agent are used as raw materials, a proper amount of solvent is added to form slurry, the slurry is subjected to spray drying to obtain a composite material, the composite material is subjected to ultrahigh temperature heat treatment under vacuum, graphene oxide is reduced, the template agent is melted off, and the non-swelling three-dimensional graphene microsphere with controllable particle size is obtained. In the embodiment, the composite material is subjected to ultra-high temperature heat treatment under a vacuum condition, so that the groups on the surface of the graphene oxide are removed, and the conjugated structure of the surface of the graphene oxide is repaired, thereby obtaining the reduced graphene microsphere.
In some embodiments, the step of mixing the graphene oxide dispersion with a template to obtain a composite material comprises: adding a template agent into the graphene oxide dispersion liquid, and mixing to enable graphene oxide to be adsorbed on the surface of the template agent to prepare graphene oxide-template agent slurry; and carrying out spray drying treatment on the graphene oxide-template agent slurry to obtain the composite material. In this embodiment, the template mainly plays a supporting role, and in the process of mixing the graphene oxide and the template in the solvent, the graphene oxide is attached to the surface of the template through physical adsorption and forms a microsphere structure through self-assembly.
In some embodiments, the size of the finally prepared graphene microsphere can be effectively regulated and controlled by adjusting the mass ratio of the graphene oxide to the template. In some preferred embodiments, in the graphene oxide-templating agent slurry, the mass ratio of graphene oxide to templating agent is (1-5): (50-500), and within this ratio, the graphene oxide can be sufficiently adsorbed on the surface of the templating agent to form a microsphere-structured composite material.
In some embodiments, the solvent is selected from one or more of deionized water, methanol, ethanol, acetone, and isopropanol, but is not limited thereto. In some embodiments, the templating agent is selected from one of, but not limited to, silica microspheres, silicon nitride microspheres, alumina microspheres, or copper oxide microspheres. In some embodiments, the temperature of the spray drying process is 100-.
In some embodiments, the composite material is subjected to heat treatment at 3000 ℃ under the condition that the vacuum degree is lower than 10Pa, so as to obtain the graphene microsphere. In the embodiment, gas generated in the reduction process of graphene oxide can be quickly removed in a vacuum environment lower than 10Pa, and the melting point is reduced; on the other hand, the heat treatment at the temperature of 2000-3000 ℃ can melt the template agent, effectively repair the conjugated structure on the surface of the graphene oxide, obtain a more perfect graphene microsphere structure, and enhance the interaction between graphene sheets, thereby inhibiting the expansion of the graphene microsphere.
In some embodiments, the graphene microspheres in the graphene microsphere thermal conductive layer have a diameter of 1-10 um. The graphene microsphere prepared by the method has excellent heat conductivity coefficients in the horizontal direction and the vertical direction, so that the graphene microsphere heat conduction layer has a good heat conduction effect.
In some embodiments, the thickness of the graphene microsphere thermal conductive layer is 10-100um, and the thermal conductive effect of the graphene microsphere thermal conductive layer is optimal in the thickness range.
In some embodiments, the double-sided adhesive tape material includes a composite resin adhesive and graphene microspheres. In the embodiment, the graphene microspheres are doped in the composite resin adhesive, so that the double-sided adhesive layer also has a heat conduction effect, and the graphene microsphere heat conduction film has a more excellent heat conduction effect. In some embodiments, the doping concentration of the graphene microspheres in the double-sided adhesive tape material is 10-15%. In some embodiments, the thickness of the double-sided adhesive layer is 20-80um, and within the thickness range, the adhesiveness of the double-sided adhesive layer can be ensured, and the double-sided adhesive layer can maintain a better heat conduction effect.
In some embodiments, a release paper is further disposed on the double-sided adhesive layer.
In some embodiments, an electronic product is further provided, which includes a heat source and a heat sink, wherein the graphene microsphere thermal conductive film of the present invention is disposed between the heat source and the heat sink. When the graphene microsphere heat-conducting film is used for an electronic product, the release paper layer is removed firstly, and then the heating source and the radiating fins are tightly connected through the double-sided adhesive layer, so that the radiating effect of the electronic product is effectively enhanced.
In some embodiments, the electronic product is one of a mobile phone, a notebook computer, or a tablet, but is not limited thereto.
To sum up, the utility model provides a graphite alkene microballon heat-conducting membrane includes graphite alkene microballon heat-conducting layer and sets up the double-sided adhesive layer of graphite alkene microballon heat-conducting layer upper surface and lower surface. The graphene microsphere heat conduction layer has extremely high horizontal heat conduction coefficient (1000-.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (7)
1. The graphene microsphere heat conduction membrane is characterized by comprising a graphene microsphere heat conduction layer and double-sided adhesive layers arranged on the upper surface and the lower surface of the graphene microsphere heat conduction layer; a release paper layer is also arranged on the double-sided adhesive layer; the horizontal thermal conductivity of the graphene microsphere thermal conduction layer is 1000-2000W/m.K, and the vertical thermal conductivity is 500-1500W/m.K.
2. The graphene microsphere thermal conductive film according to claim 1, wherein the graphene microsphere thermal conductive layer material is graphene microspheres.
3. The graphene microsphere thermal membrane according to claim 2, wherein the diameter of the graphene microsphere is 1-10 um.
4. The graphene microsphere thermal conductive film according to claim 1, wherein the thickness of the graphene microsphere thermal conductive layer is 10-100 um.
5. The graphene microsphere thermal membrane according to claim 1, wherein the thickness of the double-sided adhesive layer is 20-80 um.
6. An electronic product, comprising a heat source and a heat sink, wherein the graphene microsphere thermal conductive film according to any one of claims 1 to 5 is disposed between the heat source and the heat sink.
7. The electronic product according to claim 6, wherein the electronic product is one of a mobile phone, a notebook computer or a tablet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921514434.8U CN211128729U (en) | 2019-09-11 | 2019-09-11 | Graphene microsphere heat-conducting film and electronic product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921514434.8U CN211128729U (en) | 2019-09-11 | 2019-09-11 | Graphene microsphere heat-conducting film and electronic product |
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| CN211128729U true CN211128729U (en) | 2020-07-28 |
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| CN201921514434.8U Active CN211128729U (en) | 2019-09-11 | 2019-09-11 | Graphene microsphere heat-conducting film and electronic product |
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