CN109968756A - A kind of carbon-based laminated film of Flexible Displays High Efficiency Thermal management High directional thermal conductivity - Google Patents
A kind of carbon-based laminated film of Flexible Displays High Efficiency Thermal management High directional thermal conductivity Download PDFInfo
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- CN109968756A CN109968756A CN201910181009.XA CN201910181009A CN109968756A CN 109968756 A CN109968756 A CN 109968756A CN 201910181009 A CN201910181009 A CN 201910181009A CN 109968756 A CN109968756 A CN 109968756A
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- thermal conductivity
- thermally conductive
- carbon
- adhesive layer
- graphite flake
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 23
- 239000012790 adhesive layer Substances 0.000 claims abstract description 38
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 38
- 239000010439 graphite Substances 0.000 claims abstract description 38
- 239000002390 adhesive tape Substances 0.000 claims abstract description 22
- 238000005245 sintering Methods 0.000 claims abstract description 12
- 239000000758 substrate Substances 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000010792 warming Methods 0.000 claims description 15
- 238000011049 filling Methods 0.000 claims description 14
- 239000000377 silicon dioxide Substances 0.000 claims description 11
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- 238000003763 carbonization Methods 0.000 claims description 9
- 229910021389 graphene Inorganic materials 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 238000004026 adhesive bonding Methods 0.000 claims description 5
- WHJFNYXPKGDKBB-UHFFFAOYSA-N hafnium;methane Chemical compound C.[Hf] WHJFNYXPKGDKBB-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000003595 mist Substances 0.000 claims description 5
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910007948 ZrB2 Inorganic materials 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- VWZIXVXBCBBRGP-UHFFFAOYSA-N boron;zirconium Chemical compound B#[Zr]#B VWZIXVXBCBBRGP-UHFFFAOYSA-N 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 4
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 4
- 239000011863 silicon-based powder Substances 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 229920002799 BoPET Polymers 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000007822 coupling agent Substances 0.000 claims description 3
- -1 radical siloxane Chemical class 0.000 claims description 3
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 2
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 claims description 2
- 235000019441 ethanol Nutrition 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 6
- 239000003292 glue Substances 0.000 abstract description 6
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 19
- 239000000741 silica gel Substances 0.000 description 6
- 229910002027 silica gel Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229910017083 AlN Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229920005573 silicon-containing polymer Polymers 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
- B32B9/007—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile comprising carbon, e.g. graphite, composite carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J1/00—Adhesives based on inorganic constituents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/302—Conductive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Laminated Bodies (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention discloses a kind of carbon-based laminated films of Flexible Displays High Efficiency Thermal management High directional thermal conductivity, including double faced adhesive tape, the graphite flake set on the double faced adhesive tape two sides and the high thermal conductivity one-faced tapes set on graphite flake surface；The double faced adhesive tape is High directional thermal conductivity double faced adhesive tape, including the first base and set on the first thermally conductive adhesive layer on first base two sides；The graphite flake is the graphite flake of continuously graded integral sintering；The high thermal conductivity one-faced tapes include the second base and the second thermally conductive adhesive layer set on second substrate surface.By the graphite flake that continuously graded integral sintering is arranged in High directional thermal conductivity double faced adhesive tape two sides, the structure of high thermal conductivity one-faced tapes is covered again, with the highly-conductive hot carbon based coextruded film that the composite construction of high-heat-conductivity glue band and graphite flake is formed, there is efficient thermally conductive and heat dissipation performance.
Description
Technical field
The present invention relates to Flexible Displays thermally conductive film field, in particular to a kind of Flexible Displays High Efficiency Thermal management orientation
Highly-conductive hot carbon based coextruded film.
Background technique
Flexible Displays are the deformable flexible display devices being made of a soft, with the quick hair of electronic product
Exhibition, Flexible Displays product is also gradually to lightening development, but the lighter electronic product the thinner, and inner heat source density is higher,
And available radiating convection space is limited, therefore requirement of the Flexible Displays to heat dissipation also increases accordingly.
Thermally conductive film is a kind of light thin and flexible layer material, is usually used in the heat sink material of technical field of electronic materials,
Need to generally have excellent mechanical property, chemical stability, high temperature resistance and heating conduction, however in the prior art, with
The lightening and high-incidence thermalization of Flexible Displays electronic product, thermally conductive film material there are still it is thermally conductive it is insufficient, heat dissipation is non-uniform
Problem.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of Flexible Displays
The carbon-based laminated film of High Efficiency Thermal management High directional thermal conductivity.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of Flexible Displays High Efficiency Thermal management use is fixed
To highly-conductive hot carbon based coextruded film, including double faced adhesive tape, set on the graphite flake on the double faced adhesive tape two sides and set on graphite flake
The high thermal conductivity one-faced tapes on surface；It is formed by covering stickup high thermal conductivity one-faced tapes again in double faced adhesive tape two sides stickup graphite flake
Laminate composite structure can give full play to the heat-conduction effect of heat-conducting glue band and graphite flake, have efficient thermally conductive and heat dissipation performance；
The double faced adhesive tape be High directional thermal conductivity double faced adhesive tape, including the first base and be set to first base two
The thermally conductive adhesive layer of the first of face；
The graphite flake is the graphite flake of continuously graded integral sintering, and graphite flake is a kind of completely new heat conduction and heat radiation material
Material has unique crystal grain orientation, and uniform heat conduction, laminated structure can well adapt to any surface in both directions, can put down
It is sliding to be attached at any plane and curved surface, there is the super-high heat-conductive performance in 1200w/ (m ﹒ k) range in plane；
The high thermal conductivity one-faced tapes include the second base and the second thermally conductive gluing set on second substrate surface
Layer.
Preferably, the described first thermally conductive adhesive layer and the second thermally conductive adhesive layer by following parts by weight material through mixing,
It is coated with, toasts:
Graphene is a kind of emerging high heat conduction carbon material, has excellent optics, electricity, mechanical characteristic, while also having
There is good toughness, theoretical Young's modulus reaches 1.0TPa, and theoretical thermal coefficient is 5300w/ (m ﹒ k), thermally conductive when as carrier
Also up to 600w/ (m ﹒ k), in addition graphene also has two kinds of heat transfer mechanisms of phonon and electronics, phase as conductive filler to coefficient
There is very superior heating conduction than other Heat Conduction Materials.It can be optimized by graphene-doped in silica adhesive system
Heat conduction network, hence it is evident that promote heating conduction.
Preferably, the inorganic heat filling is aluminum nitride powder, in silicon powder, zirconium diboride powder, hafnium carbide micro mist
One or more combinations.Aluminum nitride powder and silicon powder are all good Heat Conduction Materials；Zirconium diboride is hexagonal crystal, is had
The advantages that high-melting-point, low-density, high heat conductance, heat resistance are strong, flame retardant property is good and corrosion-resistant is that a kind of preferable high temperature resistant is same
When good heat conductivity filler；Hafnium carbide micro mist fusing point is up to 3890 DEG C, the thermal expansion system with good heat-conduction-type, very little
Several and shock resistance type；By adding inorganic heat filling in silica gel and graphene composite heat-conducting system, silica gel-graphite is formed
Alkene-inorganic heat filling composite heat-conducting network, further enhances the heating conduction of thermally conductive adhesive layer.
Preferably, the dispersing agent includes: 10-15 parts of nano silica, propylene glycol methyl ether acetate by weight
20-30 parts, 3-6 parts of dimethyl silicone polymer, 1-2 parts of aminopropyl triethoxysilane.Nanometer silicon dioxide particle size is small, divides
Sub- state is in three-dimensional net structure, can prevent sedimentation and floating of the inorganic heat filling in silica gel system, and it is steady to improve system
Qualitative and uniformity；Existing ehter bond in propylene glycol methyl ether acetate molecule has carbonyl again, and carbonyl forms the structure of ester again, to pole
Property and apolar substance have a very strong solvability, hydrotropy diluting effect can be played by being added in silica gel system；Poly dimethyl silicon
Oxygen alkane is a kind of lesser surfactant of surface tension, and dispersion, lubrication and defoaming effect in silica gel system can be improved, make
Graphene and dispersion when inorganic heat filling mixed at high speed be more evenly in system；Aminopropyl triethoxysilane can improve nothing
Wetability and dispersibility of the machine filler in organic polymer systems, while amino in its molecular structure and ethyl can be distinguished
It is coupled organic polymer and inorganic filler, to reinforce the connection network of inorganic heat filling and graphene and silica gel, to mention
The caking property of high-heat-conductivity glue adhesion coating.
Preferably, the solvent is one of acetone, ethyl alcohol, methyl acetate and n-hexane or multiple combinations.
Preferably, the described first thermally conductive adhesive layer and the second thermally conductive adhesive layer the preparation method comprises the following steps: by silica adhesive
It is added in solvent and stirs evenly, add inorganic heat filling, graphene powder and mixed using high speed agitator high speed dispersion
Close uniformly, add later dispersing agent, curing agent and coupling agent and be uniformly mixed obtain thermally conductive gluing mixed liquor, finally by its point
It is not coated on first base and the second substrate surface is toasted obtains the first thermally conductive adhesive layer and the second thermally conductive adhesive layer.It is logical
It crosses that the effect of high speed mechanical dispersion can make graphene and inorganic heat filling is full and uniform is dispersed in silica gel system, is formed compound
Heat conduction network structure.
Preferably, the graphite flake the preparation method comprises the following steps:
1) by PI film be placed in carbide furnace heat be carbonized, heating process use gradient increased temperature method, first with 6-8 DEG C/
The heating rate of min is warming up to 600 DEG C, then is warming up to 1200 DEG C with the heating rate of 2-3 DEG C/min, obtains carbonization intermediate simultaneously
It is cooling；
2) by step 1) carbonization intermediate merging vacuum drying oven in be sintered, be sintered using gradient increased temperature by the way of, elder generation with
The heating rate of 10-15 DEG C/min is warming up to 800 DEG C, then is warming up to 1500 DEG C with the heating rate of 5-8 DEG C/min, finally with 1-
Natural cooling after the heating rate of 2 DEG C/min is warming up to 2900 DEG C, by be graphitized to carbonization intermediate vacuum-sintering
To graphite flake.
For PI film after being carbonized and being graphitized sintering, the carbon-base film of formation is continuously graded integral sintering
Graphite flake is sintered by integrated serialization, and the other compositions in PI film in addition to carbon are discharged, and continuously graded heating can be with
Keep carbonized film volume change in vacuum-sintering graphitizing process uniform, so that the compactness and crystallinity of carbon atom arrangement are improved,
Make the graphite flake to be formed that there is higher thermal coefficient, and easy to operate, preparation effect is high, and heating conduction is more evenly stable.
Preferably, first base and the second base are PET film, with a thickness of 8-10um.
Preferably, the described first thermally conductive adhesive layer and the second thermally conductive adhesive layer are with a thickness of 5-10um.
Preferably, the graphite flake is with a thickness of 5-8um.
The beneficial effects of the present invention are: being burnt by the way that continuously graded integration is arranged in High directional thermal conductivity double faced adhesive tape two sides
The graphite flake of knot, then the structure of high thermal conductivity one-faced tapes is covered, the height formed with the composite construction of high-heat-conductivity glue band and graphite flake
Thermally conductive carbon-based laminated film has efficient thermally conductive and heat dissipation performance；In addition it is introduced in the thermally conductive adhesive layer of high-heat-conductivity glue band
In silica gel-graphene-inorganic heat filling compound system, improved by incorporation dispersing agent and with mechanical high-speed peptizaiton thermally conductive
The mixing uniformity of thermally conductive component in adhesive layer, to improve the heat dissipation uniformity and stability of thermally conductive film.
Detailed description of the invention
Fig. 1 is the carbon-based complex thin film structure schematic diagram of Flexible Displays High Efficiency Thermal management High directional thermal conductivity in the present invention.
Description of symbols:
1-double faced adhesive tape；2-graphite flakes；3-high thermal conductivity one-faced tapes；11-the first base；12-the first thermally conductive gluing
Layer；31-the second base；32-the second thermally conductive adhesive layer.
Specific embodiment
The present invention will be further described in detail below with reference to the embodiments, to enable those skilled in the art referring to specification
Text can be implemented accordingly.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein are not precluded one or more
The presence or addition of a other elements or combinations thereof.
Embodiment one
As shown in Figure 1, the carbon-based laminated film of one of the present embodiment Flexible Displays High Efficiency Thermal management High directional thermal conductivity,
Including double faced adhesive tape 1, the high thermal conductivity single side set on the graphite flake 2 on 1 two sides of double faced adhesive tape and set on 2 surface of graphite flake
Adhesive tape 3；The double faced adhesive tape 1 be High directional thermal conductivity double faced adhesive tape, including the first base 11 and be set to first base 11
The thermally conductive adhesive layer 12 of the first of two sides；The high thermal conductivity one-faced tapes 3 are including the second base 31 and are set to second base
The thermally conductive adhesive layer 32 of the second of 31 surfaces；The graphite flake 2 is the graphite flake of continuously graded integral sintering.
Wherein, the described first thermally conductive adhesive layer and the second thermally conductive adhesive layer by following parts by weight material through mixing, coating,
It toasts:
Wherein, the inorganic heat filling includes: 15 parts of aluminum nitride powder, 25 parts of silicon powder, zirconium diboride powder by weight
20 parts, 45 parts of hafnium carbide micro mist.
Wherein, the dispersing agent includes: 10 parts of nano silica, 20 parts of propylene glycol methyl ether acetate, gathers by weight
6 parts of dimethyl siloxane, 2 parts of aminopropyl triethoxysilane.
Wherein, the solvent is acetone.
Wherein, the described first thermally conductive adhesive layer and the second thermally conductive adhesive layer the preparation method comprises the following steps: silica adhesive is added
It stirs evenly, add inorganic heat filling, graphene powder and is mixed using high speed agitator high speed dispersion equal into solvent
It is even, add later dispersing agent, curing agent and coupling agent and be uniformly mixed obtain thermally conductive gluing mixed liquor, finally it is applied respectively
It is distributed in first base and the second substrate surface is toasted obtains the first thermally conductive adhesive layer and the second thermally conductive adhesive layer.
Wherein, the graphite flake the preparation method comprises the following steps:
1) PI film is placed in heat in carbide furnace and is carbonized, the method that heating process uses gradient increased temperature, first with 6 DEG C/min
Heating rate be warming up to 600 DEG C, then be warming up to 1200 DEG C with the heating rate of 2 DEG C/min, obtain carbonization intermediate and cooling；
2) by step 1) carbonization intermediate merging vacuum drying oven in be sintered, be sintered using gradient increased temperature by the way of, elder generation with
The heating rate of 10 DEG C/min is warming up to 800 DEG C, then is warming up to 1500 DEG C with the heating rate of 5 DEG C/min, finally with 1 DEG C/min
Heating rate be warming up to 2900 DEG C after natural cooling, by being graphitized to obtain graphite to carbonization intermediate vacuum-sintering
Piece.
Wherein, first base and the second base are PET film, with a thickness of 10um；The first thermally conductive adhesive layer and
Second thermally conductive adhesive layer is with a thickness of 8um；The graphite flake is with a thickness of 7um.
Embodiment two
The present embodiment and embodiment one the difference is that, the inorganic heat filling is aluminium nitride, remaining and embodiment
One is identical.
Embodiment three
The present embodiment and embodiment one the difference is that, the dispersing agent is nano silica, remaining and embodiment
One is identical.
Comparative example one
The present embodiment and embodiment one the difference is that, the first and second thermally conductive adhesive layer thermally conductive is filled out without inorganic
Material, remaining is the same as example 1.
Comparative example two
The present embodiment and embodiment one the difference is that, the first and second thermally conductive adhesive layer is free of dispersing agent,
It is remaining to be the same as example 1.
Comparative example three
The present embodiment and embodiment one the difference is that, the graphite flake be PI film is placed in vacuum drying oven with 6 DEG C/
Gained after the heating rate of min is gradually heated to 2900 DEG C, remaining is the same as example 1.
The following are the test performances of above-described embodiment and comparative example:
As seen from the above table, pass through the graphite in High directional thermal conductivity double faced adhesive tape two sides setting continuously graded integral sintering
Piece, then the structure of high thermal conductivity one-faced tapes is covered, it is carbon-based with the high thermal conductivity that the composite construction of high-heat-conductivity glue band and graphite flake is formed
Thermal conductivity can be improved in laminated film；By the two rocization zirconiums and hafnium carbide that introduce low-density, high thermal conductivity in thermally conductive adhesive layer
The inorganic heat fillings such as micro mist, not only can be improved thermal conductivity, can also improve density, impact resistance and the drop of laminated film
Low thermal coefficient of expansion, in addition introducing dispersing agent not only can make inorganic filler and organic adhesion agent be uniformly mixed to form compound conduction
Network can also reduce thermal expansion coefficient, to improve heat transfer stability and uniformity.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details.
Claims (10)
1. a kind of carbon-based laminated film of Flexible Displays High Efficiency Thermal management High directional thermal conductivity, which is characterized in that including double faced adhesive tape,
Graphite flake set on the double faced adhesive tape two sides and the high thermal conductivity one-faced tapes set on graphite flake surface；
The double faced adhesive tape is High directional thermal conductivity double faced adhesive tape, including the first base and set on first base two sides
First thermally conductive adhesive layer；
The graphite flake is the graphite flake of continuously graded integral sintering；
The high thermal conductivity one-faced tapes include the second base and the second thermally conductive adhesive layer set on second substrate surface.
2. the carbon-based laminated film of Flexible Displays High Efficiency Thermal management High directional thermal conductivity according to claim 1, feature exist
In, the first thermally conductive adhesive layer and the second thermally conductive adhesive layer by the material of following parts by weight through mixing, coating, toast:
3. the carbon-based laminated film of Flexible Displays High Efficiency Thermal management High directional thermal conductivity according to claim 2, feature exist
In the inorganic heat filling is one of aluminum nitride powder, silicon powder, zirconium diboride powder, hafnium carbide micro mist or a variety of groups
It closes.
4. the carbon-based laminated film of Flexible Displays High Efficiency Thermal management High directional thermal conductivity according to claim 2, feature exist
In the dispersing agent includes: 10-15 parts of nano silica, 20-30 parts of propylene glycol methyl ether acetate, poly- diformazan by weight
3-6 parts of radical siloxane, 1-2 parts of aminopropyl triethoxysilane.
5. the carbon-based laminated film of Flexible Displays High Efficiency Thermal management High directional thermal conductivity according to claim 2, feature exist
In the solvent is one of acetone, ethyl alcohol, methyl acetate and n-hexane or a variety of combinations.
6. the carbon-based laminated film of Flexible Displays High Efficiency Thermal management High directional thermal conductivity according to claim 2, feature exist
In being stirred the preparation method comprises the following steps: silica adhesive is added in solvent for, the first thermally conductive adhesive layer and the second thermally conductive adhesive layer
It mixes uniformly, add inorganic heat filling, graphene powder and is uniformly mixed using high speed agitator high speed dispersion, added again later
Enter dispersing agent, curing agent and coupling agent and be uniformly mixed and obtain thermally conductive gluing mixed liquor, is finally respectively coated on described the
One base and the second substrate surface is toasted obtains the first thermally conductive adhesive layer and the second thermally conductive adhesive layer.
7. the carbon-based laminated film of Flexible Displays High Efficiency Thermal management High directional thermal conductivity according to claim 1, feature exist
In, the graphite flake the preparation method comprises the following steps:
1) PI film is placed in heat in carbide furnace and is carbonized, the method that heating process uses gradient increased temperature, first with 6-8 DEG C/min's
Heating rate is warming up to 600 DEG C, then is warming up to 1200 DEG C with the heating rate of 2-3 DEG C/min, obtains carbonization intermediate and cooling；
2) it will be sintered, be sintered by the way of gradient increased temperature, first with 10-15 in the carbonization intermediate merging vacuum drying oven in step 1)
DEG C/heating rate of min is warming up to 800 DEG C, then is warming up to 1500 DEG C with the heating rate of 5-8 DEG C/min, finally with 1-2 DEG C/
Natural cooling after the heating rate of min is warming up to 2900 DEG C, by being graphitized to obtain stone to carbonization intermediate vacuum-sintering
Ink sheet.
8. the carbon-based laminated film of Flexible Displays High Efficiency Thermal management High directional thermal conductivity according to claim 1, feature exist
In first base and the second base are PET film, with a thickness of 8-10um.
9. the carbon-based laminated film of Flexible Displays High Efficiency Thermal management High directional thermal conductivity according to claim 1, feature exist
In the first thermally conductive adhesive layer and the second thermally conductive adhesive layer are with a thickness of 5-10um.
10. the carbon-based laminated film of Flexible Displays High Efficiency Thermal management High directional thermal conductivity according to claim 1, feature exist
In the graphite flake is with a thickness of 5-8um.
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