CN109748275A - A kind of composite graphite preparation of sections method - Google Patents
A kind of composite graphite preparation of sections method Download PDFInfo
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- CN109748275A CN109748275A CN201711089118.6A CN201711089118A CN109748275A CN 109748275 A CN109748275 A CN 109748275A CN 201711089118 A CN201711089118 A CN 201711089118A CN 109748275 A CN109748275 A CN 109748275A
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Abstract
The invention discloses a kind of composite graphite preparation of sections methods, comprising the following steps: a graphite substrate is added in a solvent and is stirred, to be uniformly mixed to form a solution, which includes Multi-layer graphite thin slice, between 2 microns to 3 microns；One graphene layer is added in the solution and is stirred, to be uniformly mixed to form a slurry, the graphene layer includes that multi-layer graphene is mixed in the graphite flake, the size of the graphene is between 50 microns to 80 microns, it is with a thickness of between 0.02 micron to 0.05 micron, and the content of the graphene layer is between the 5% to 10% of the content of the graphite substrate；By the slurry coating on an object and the dry slurry, to form an equadag coating；Be compacted the equadag coating, to form the composite graphite thin slice, the composite graphite thin slice with a thickness of between 120 microns to 160 microns；And separate the composite graphite thin slice and the substrate.
Description
Technical field
The present invention relates to a kind of composite material, especially one kind to meet graphite flake.The invention further relates to a kind of composite stones
Black preparation of sections method and the slurry for preparing composite graphite thin slice.
Background technique
With the development of science and technology, the design and research and development for electronic device are sent out towards lightening and high performance direction
Exhibition.But in the case where performance boost and thinning fuselage, the electronic building brick of electronic equipment will inevitably generate more previous
More heats.However, working under hot environment for a long time, the performance of electronic equipment will be very limited, excessively high
Temperature possibly even causes the permanent damage of electronic building brick.
Current radiator is usually the top surface that plane is attached to heat source, but due to the material property of radiator, such as
Fruit heat sink material does not have flexibility, will be unable to the face shaping with heat source and changes, to influence thermally conductive performance.
Summary of the invention
To solve existing technical problem, the purpose of the present invention is to provide a kind of composite graphite thin slices, and this is multiple
Closing graphite flake is that can be changed with material flexible according to heat source face shaping to meet different radiating requirements.
To achieve the goals above, one aspect of the invention provides a kind of composite graphite thin slice, comprising: a graphite-based
Material, it includes Multi-layer graphite thin slice, the size of the graphite flake is between 100 microns to 300 microns, with a thickness of 2 microns to 3
Between micron；And a graphene layer, it is mixed in the graphite flake comprising multi-layer graphene, the size of the graphene is 50
Micron is between 80 microns, and between 0.02 micron to 0.05 micron, and the content of the graphene layer is the graphite-based
Between the 5% to 10% of material；Wherein after being compacted the composite graphite thin slice with a thickness of between 120 microns to 160 microns.
Another aspect of the invention additionally provides a kind of composite graphite preparation of sections method, comprising the following steps:
One graphite substrate is added in a solvent and is stirred, to be uniformly mixed to form a solution, the weight of the graphite substrate
Percentage is between 23% to 85%, which includes Multi-layer graphite thin slice, the size of the graphite flake be 100 microns extremely
Between 300 microns, between 2 microns to 3 microns；
One graphene layer is added in the solution and is stirred, to be uniformly mixed to form a slurry, which includes more
Layer graphene is mixed in the graphite flake, and the size of the graphene is between 50 microns to 80 microns, with a thickness of 0.02
Micron is between 0.05 micron, and the content of the graphene layer is between the 5% to 10% of the content of the graphite substrate；By the slurry
Material is coated on an object and the dry slurry, to form an equadag coating；It is compacted the equadag coating, to form the composite graphite
Thin slice, the composite graphite thin slice with a thickness of between 120 microns to 160 microns；And separate the composite graphite thin slice and the base
Plate.
Preferably, wherein the equadag coating with a thickness of between 80 microns to 100 microns.
Preferably, wherein the solvent is water, dimethylformamide, tetrahydrofuran, ketone, alcohols, ethyl acetate or first
One of benzene is a variety of.
Preferably, wherein the solvent is N-Methyl pyrrolidone or acetone, ethyl alcohol or ethylene glycol.
Preferably, wherein the weight percent of the graphite substrate is between 22% to 65%.
Preferably, the application pattern is coating or printing wherein in the step of forming the equadag coating.
Preferably, wherein the application pattern is spraying and applying or spin coated；The printing is that inkjet printing or halftone print
Brush.
Preferably, 450-600 DEG C of drying temperature, drying time is between 1 to 2 hour wherein in drying steps.
Another aspect of the invention additionally provides a kind of slurry for manufacturing composite graphite thin slice, comprising: a solvent；One graphite
Substrate, includes Multi-layer graphite thin slice, and the size of the graphite flake is between 100 microns to 300 microns, extremely with a thickness of 2 microns
Between 3 microns；And a graphene layer, it include multi-layer graphene, the size of the graphene is between 50 microns to 80 microns,
Between 0.02 micron to 0.05 micron；Wherein, the graphite flake and the graphene uniform are mixed in the solvent
In, and the weight percent of the graphite substrate is between 23% to 85%, the content of the graphene layer is the graphite substrate
Between 5% to 10%.
Preferably, wherein the solvent is water, dimethylformamide, tetrahydrofuran, ketone, alcohols, ethyl acetate or first
One of benzene is a variety of.
Preferably, wherein the solvent is N-Methyl pyrrolidone or acetone, ethyl alcohol or ethylene glycol.
Preferably, wherein the weight percent of the graphite substrate is between 22% to 65%.
Compared with the prior art, composite graphite thin slice provided in an embodiment of the present invention can answer different heat source face shapings and
It realizes and attaches completely, to provide the attaching effect of larger area.In addition, composite graphite thin slice of the invention has more electromagnetic wave
Shield effectiveness.
Detailed description of the invention
Fig. 1 is a kind of flow chart of composite graphite method for preparing slices of the embodiment of the present invention.
Fig. 2 is the flow chart of the composite graphite method for preparing slices of another embodiment of the present invention.
Specific embodiment
Technical solution of the present invention is further described in detail below in conjunction with attached drawing.
As shown in Figure 1, a kind of composite graphite preparation of sections method provided by the invention is as shown in Figure 1, composite graphite is thin
The preparation method of piece includes: that a graphite substrate is added in a solvent and is stirred, to be uniformly mixed to form a solution, graphite substrate
Weight percent be 23% to 85% between (step S01)；One graphene layer is added in solution and is stirred, uniformly to mix
A slurry is formed, the content of graphene layer is between the 5% to 10% of the content of graphite substrate (step S02)；By slurry coating
In on an object and dry slurry, to form an equadag coating (step S03)；And compacted graphite coating, to form composite stone
Black thin slice (step S04).
Firstly, executing step S01: a graphite substrate is added in a solvent and is stirred, to be uniformly mixed to form a solution,
Wherein, the weight percent of graphite substrate is between 23% to 85%.It is further preferred that the weight percent of graphite substrate can
Between 22% to 65%.The graphite substrate of the present embodiment is powdered, and includes multiple graphite flakes (or nano-graphite
Piece, graphitenanoplatelet).Wherein, the size of graphite flake can be between 100 microns to 300 microns, and thickness can
Between 2 microns to 3 microns.In addition, solvent may be, for example, water, dimethylformamide (DMF), tetrahydrofuran (THF), ketone,
One of alcohols, ethyl acetate or toluene are a variety of.The solvent of the present embodiment is by taking water as an example.In various embodiments,
It can be N-Methyl pyrrolidone (NMP) or acetone when solvent is ketone；It can be ethyl alcohol when solvent is alcohols
(Ethanol) or ethylene glycol (Ethyleneglycol).In addition, solvent also can be above-mentioned solvent (water, dimethylformamide, four
Hydrogen furans, ketone or alcohols) any mixing, do not limit.
Then step S02 is carried out are as follows: a graphene layer is added in the solution and is stirred, to be uniformly mixed to form a slurry
Material, wherein the content of graphene layer is between the 5% to 10% of the content of graphite substrate.In this, mixing time can be 55 minutes
To between 135 minutes, as long as graphite substrate, graphene layer can be allow uniformly to mix with solvent and form slurry.Stone
Black alkene layer is the material using graphene as substrate, and can be natural graphite or electrographite.Graphene layer includes multiple graphenes
Particle, and the size of graphene particle is between 50 microns to 80 microns, between 0.02 micron to 0.05 micron.?
In different embodiments, also first graphene layer can be added in solvent and stirred evenly, graphite substrate is added and stir evenly；Or
Graphite substrate is added in solvent simultaneously with graphene layer and stirs evenly by person, and the present invention is not intended to limit.
Therefore, include solvent, graphite substrate and graphene layer in the slurry after completing step S02, and uniformly mix and be in
It is thick.In this slurry, the weight percent of graphite substrate is between 23% to 85%, it is further preferred that graphite substrate
Weight percent be 22% to 65% between, and the content of graphene layer be graphite substrate content 5% to 10% between.
Then, step S03 is carried out: by slurry coating on an object and dry slurry, to form an equadag coating.In this
In step, object such as high molecular material, metal, ceramics, stationery or dry goods, but it is not limited to substrate, and application pattern can be
Coating or printing.Wherein, application pattern can be spraying and applying (spraycoating) or spin coated (spincoating), and
Printing can be inkjet printing (inkjet printing) or screen painting (screenprinting), not limit；Coating or print
The Thickness ness of brush is about between 80 microns to 100 microns.In addition, in drying process, such as can be by the object with slurry
It is placed in baking in oven, to form equadag coating after removing the solvent in slurry.Wherein, drying temperature need to lower than 550 DEG C and
Higher than room temperature, and drying time can be between 1 to 2 hour.Therefore, after drying process, the thickness of the equadag coating after drying
Degree can be between 80 microns to 100 microns.
Step S04: compacted graphite coating is carried out, to form composite graphite thin slice.It, can be for example dry with idler wheel spreading in this
Equadag coating afterwards, to obtain the composite graphite thin slice being located on object.
In various embodiments, if object is non-when being planar substrates, when object is, for example, trapezoidal shape, then it is the same can will
Slurry coating is on the outer surface of trapezoidal shape object and dry, and to form an equadag coating, recycling meets equadag coating shape
Equadag coating after the jig compacting of shape is dry, to obtain non-planar composite graphite thin slice.Therefore, above-mentioned slurry can be because
Different heat source face shapings is answered, or can provide larger area and attach heat source, meets the compound of heat source face shaping to be formed
Graphite flake, with the high radiating requirements in response to electronic building brick of different shapes.
Unlike Fig. 1, other than step S01 to step S04, the preparation method of Fig. 2 further includes step S05: point
From composite graphite thin slice and object.It is inserted between composite graphite thin slice and object using such as knife, to abolish composite graphite
Vacuum state between thin slice and object and by composite graphite thin slice and object separation, to obtain composite graphite thin slice.It obtains
The thickness of composite graphite thin slice can be between 120 microns to 160 microns.
Special one is mentioned that, in different application examples, composite graphite thin slice can also not need to be separated with object and directly will
It is applied on heat transfer, and the present invention does not limit.
Therefore, the composite graphite thin slice of the present embodiment has flexibility, includes graphite substrate and graphene layer, and graphene layer is mixed
Together in graphite substrate, and the content of graphene layer is between the 5% to 10% of graphite substrate.Wherein, graphite substrate includes more
Layer graphite flake, and the size of graphite flake can between 100 microns to 300 microns, thickness can for 2 microns to 3 microns it
Between.In addition, graphene layer include multi-layer graphene, and the size of graphene be 50 microns to 80 microns between, with a thickness of
Between 0.02 micron to 0.05 micron.In addition, the thickness of composite graphite thin slice can be between 120 microns to 160 microns.
It holds, it, can since the graphite flake and graphene particle that include in composite graphite thin slice have good thermal conductivity
Rapidly thermal energy is come out by heat source, and composite graphite thin slice with a thickness of between 120 microns to 160 microns so that
Composite graphite thin slice can meet the lightening requirement of electronic product now using Heat Conduction Material application is used as.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
The spirit and principles in the present invention it is interior, made any modification, equivalent replacement and improvement etc. should be included in guarantor of the invention
Protect the interior of range.
Claims (8)
1. a kind of composite graphite preparation of sections method, comprising the following steps:
One graphite substrate is added in a solvent and is stirred, to be uniformly mixed to form a solution, the weight percent of the graphite substrate
Than between 23% to 85%, which includes Multi-layer graphite thin slice, the size of the graphite flake is 100 microns to 300
Between micron, between 2 microns to 3 microns；
One graphene layer is added in the solution and is stirred, to be uniformly mixed to form a slurry, which includes multilayer stone
Black alkene is mixed in the graphite flake, and the size of the graphene is between 50 microns to 80 microns, with a thickness of 0.02 micron
To between 0.05 micron, and the content of the graphene layer is between the 5% to 10% of the content of the graphite substrate；The slurry is applied
It spreads on an object and dries the slurry, to form an equadag coating；It is compacted the equadag coating, it is thin to form the composite graphite
Piece, the composite graphite thin slice with a thickness of between 120 microns to 160 microns；And separate the composite graphite thin slice and the substrate.
2. preparation method as described in claim 1, wherein the equadag coating with a thickness of between 80 microns to 100 microns.
3. preparation method as described in claim 1, wherein the solvent is water, dimethylformamide, tetrahydrofuran, ketone, alcohol
One of class, ethyl acetate or toluene are a variety of.
4. preparation method as claimed in claim 3, wherein the solvent is N-Methyl pyrrolidone or acetone, ethyl alcohol or second two
Alcohol.
5. preparation method as described in claim 1, wherein the weight percent of the graphite substrate is between 22% to 65%.
6. preparation method as claimed in claim 3, wherein the application pattern is coating in the step of forming the equadag coating
Or printing.
7. preparation method as claimed in claim 6, wherein the application pattern is spraying and applying or spin coated；The printing is spray
Ink printing or screen painting.
8. preparation method as described in claim 1, wherein in drying steps, 450-600 DEG C of drying temperature, drying time is
Between 1 to 2 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711089118.6A CN109748275A (en) | 2017-11-08 | 2017-11-08 | A kind of composite graphite preparation of sections method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711089118.6A CN109748275A (en) | 2017-11-08 | 2017-11-08 | A kind of composite graphite preparation of sections method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109748275A true CN109748275A (en) | 2019-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711089118.6A Pending CN109748275A (en) | 2017-11-08 | 2017-11-08 | A kind of composite graphite preparation of sections method |
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| Country | Link |
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| CN (1) | CN109748275A (en) |
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2017
- 2017-11-08 CN CN201711089118.6A patent/CN109748275A/en active Pending
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Application publication date: 20190514 |