CN114350107A - Rapidly-formed anisotropic heat-conducting composite material and preparation method thereof - Google Patents
Rapidly-formed anisotropic heat-conducting composite material and preparation method thereof Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000945 filler Substances 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 33
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 29
- 239000004917 carbon fiber Substances 0.000 claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 24
- 239000010439 graphite Substances 0.000 claims abstract description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003607 modifier Substances 0.000 claims abstract description 17
- 229920000642 polymer Polymers 0.000 claims abstract description 10
- 239000011159 matrix material Substances 0.000 claims abstract description 9
- 239000003960 organic solvent Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 28
- 238000001035 drying Methods 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 21
- 238000005507 spraying Methods 0.000 claims description 15
- 238000009775 high-speed stirring Methods 0.000 claims description 14
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 5
- 229920001568 phenolic resin Polymers 0.000 claims description 5
- 239000005011 phenolic resin Substances 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 239000007822 coupling agent Substances 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims description 2
- 239000002033 PVDF binder Substances 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- 229960001149 dopamine hydrochloride Drugs 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- -1 polyethylene Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 2
- 229920002379 silicone rubber Polymers 0.000 claims description 2
- 239000004945 silicone rubber Substances 0.000 claims description 2
- 239000012257 stirred material Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 22
- 238000010276 construction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 18
- 239000010426 asphalt Substances 0.000 description 12
- 238000007789 sealing Methods 0.000 description 12
- 239000000843 powder Substances 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 238000011068 loading method Methods 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920003987 resole Polymers 0.000 description 6
- 238000004513 sizing Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 238000003892 spreading Methods 0.000 description 6
- 230000007480 spreading Effects 0.000 description 6
- 238000004506 ultrasonic cleaning Methods 0.000 description 6
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- 238000011161 development Methods 0.000 description 5
- 239000002270 dispersing agent Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 239000004642 Polyimide Substances 0.000 description 3
- 229910021389 graphene Inorganic materials 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 238000007605 air drying Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The invention discloses a rapidly-formed anisotropic heat-conducting composite material and a preparation method thereof, wherein the anisotropic heat-conducting composite material is prepared from the following raw materials in parts by mass: 50-90 parts of graphite filler; 2-20 parts of carbon fiber filler; 2-20 parts of a high-molecular polymer matrix; 1-3 parts of an interface modifier; 1-3 parts of an organic solvent. The material has excellent heat-conducting property and mechanical property, relatively high heat-conducting property is kept while the cost is reduced, and the material has obvious anisotropy, and provides a new idea and a solution on the problems of heat dissipation of electronic equipment and difficult heat dissipation of 5G base station construction. The composite material obtained by the invention can quickly dissipate heat to a larger area, has a better heat dissipation effect and is quicker to respond.
Description
Technical Field
The invention relates to the field of preparation of heat conduction materials, in particular to a rapidly-formed anisotropic heat conduction composite material and a preparation method thereof.
Background
With the continuous progress and development of electronic technology, electronic devices and various electric appliances are moving toward small and portable devices, but providing convenience causes a series of problems. The waste heat dissipation problem is more prominent, a large amount of heat energy can be generated in the operation process of the electronic device, if the heat energy can not be dissipated in time, the local temperature is too high, the operation efficiency of equipment is influenced, and even the device is permanently damaged. In order to ensure stable and efficient operation of machinery, timely heat dissipation becomes a focus of the mechanical and electronic industry. The heat dissipation can be divided into active heat dissipation and passive heat dissipation, and although the active heat dissipation efficiency is higher, the development trend of miniaturization and portability cannot be met, so that an efficient passive heat dissipation mode is needed. The core of passive heat dissipation, namely the improvement of the heat conductivity coefficient of the material, enables heat to be generated and simultaneously diffused quickly, and heat dissipation can be promoted without additional equipment for increasing weight burden. Therefore, the heat dissipation material is required to have not only a high thermal conductivity but also a low density to meet the development requirement of portability.
In order to realize efficient passive heat dissipation, a feasible approach is to develop a material with low cost, low density and high thermal conductivity, which can meet the mechanical requirements (excellent mechanical properties) of equipment and has strong heat dissipation capability, and meanwhile, the material with low density can reduce the weight burden of the equipment equipped on the portable electronic equipment. The heat dissipation materials adopted in the existing electronic equipment are mainly graphene graphite sheets and polyimide graphite sheets, wherein the heat conductivity coefficient of a single-layer graphene material is as high as 5300W/m.K, but the graphene is expensive and difficult to prepare; the polyimide graphite flake is prepared from high-crystalline polyimide through a series of high-temperature carbonization and graphitization processes, and the processes are complex and high in cost. With the development of 5G technology, the performance requirements of the equipment are continuously improved, and the area of heat dissipation materials required by the device is rapidly increased, which means the manufacturing cost is increased. The demand for low cost, high thermal conductivity materials is therefore increasing.
Although the high molecular polymer has low heat conduction efficiency and most of the high molecular polymer is a poor heat conductor, the heat conduction rate can be greatly improved by modification or filling of heat conduction particles, and the characteristics of high chemical resistance, simple forming process, light weight and high strength of the high molecular material are reserved. Ouyang, Yuge et Al use branched alumina (b-Al)2O3) As a filler to improve the thermal conductivity of Phenolic Resin (PR), b-Al is doped2O3The PR composite material has good heat-conducting property (up to 1.481W/m.K), and the heat-conducting property is improved by 7 times compared with that of a pure matrix. But is limited by the process conditions and manner, high thermal conductivity particles or fibers, such as graphite, alumina, aluminum nitride, etc., are generally selected and added in an amount generally limited to 80% or less to form the heat conductive network pathways. In order to form the uniformity for communicating the heat conducting network and the composite material, the general composite process has the disadvantages of various processes, complex steps and high material labor cost. Therefore, it is necessary to provide a simple and convenient composite process of the high thermal conductive composite material.
Disclosure of Invention
In order to achieve the above technical objective, a first aspect of the present invention provides a rapidly molded anisotropic thermal conductive composite material, which comprises the following detailed technical solutions:
a rapidly-formed anisotropic heat-conducting composite material is prepared from the following raw materials in parts by mass:
50-90 parts of graphite filler;
2-20 parts of carbon fiber filler;
2-20 parts of a high-molecular polymer matrix;
1-3 parts of an interface modifier;
1-3 parts of an organic solvent.
In some embodiments, the high molecular polymer matrix is one or more of epoxy resin, polyvinylidene fluoride, phenolic resin, silicone rubber, and polyethylene.
In some embodiments, the graphite filler is one or more of natural flake graphite, carbon black, expandable graphite, and expanded graphite.
In some embodiments, the carbon fiber filler is 300 mesh pitch based highly thermally conductive carbon fibers of 7 μm diameter.
In some embodiments, the interfacial modifier is one or more of a silane coupling agent, a titanate coupling agent, and dopamine hydrochloride.
In some embodiments, the organic solvent is one of ethanol, methanol, a hydroalcoholic mixture.
The invention provides a preparation method of a rapidly-formed anisotropic heat-conducting composite material, which comprises the following steps:
dispersing and cleaning the carbon fiber filler by using an organic solvent;
premixing the carbon fiber filler and the graphite filler, then stirring at a high speed, and spraying an interface modifier dissolved in an organic solvent during high-speed stirring to uniformly distribute the interface modifier in the filler;
drying the filler;
mixing and uniformly stirring the dried filler and the high molecular polymer matrix;
and filling the uniformly stirred materials in a mold, preheating and molding the materials on a flat vulcanizing instrument, and taking out the fully cured materials after the materials are fully cured to obtain the anisotropic heat-conducting composite material.
In some embodiments, the interfacial modifier is sprayed in an amount of 1-5% by mass of the filler.
In some embodiments, the drying temperature for the filler is 80 ℃ to 100 ℃ and the drying time is 5 hours.
Compared with the prior art, the invention has the beneficial effects that:
1. the material has excellent heat-conducting property and mechanical property, relatively high heat-conducting property is kept while the cost is reduced, and the material has obvious anisotropy, and provides a new idea and a solution on the problems of heat dissipation of electronic equipment and difficult heat dissipation of 5G base station construction. The composite material obtained by the invention can quickly dissipate heat to a larger area, has a better heat dissipation effect and is quicker to respond.
2. The invention utilizes the high pressure in the mould pressing process to lead the graphite filler and the fiber hybrid filler to be preferentially arranged in the macromolecular matrix in the direction vertical to the pressure, thereby leading the composite material to have excellent anisotropic heat-conducting property.
3. The invention adopts a powder mixing method of hybrid filler and high molecular polymer raw material to prepare the heat-conducting composite material, and uses high temperature and high pressure in mould pressing, thereby ensuring the mechanical property of the composite material to meet the basic use requirement, and simultaneously realizing a communicated high heat-conducting passage to obtain high heat-conducting property.
4. The method has the advantages of simple and convenient process flow, low requirement on process conditions and easy realization.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Putting the asphalt-based carbon fiber into 100ML absolute ethyl alcohol solution, adding a sealing film for sealing, cleaning for 30min under the power of 100W of an ultrasonic cleaning machine, washing and filtering for three times by using absolute ethyl alcohol, and drying at 60 ℃ to remove a surface sizing agent.
Premixing 50 parts of natural crystalline flake graphite and 20 parts of treated asphalt-based carbon fiber filler, spraying 3 parts of silane coupling agent pre-dissolved in absolute ethyl alcohol according to a ratio of 1:1 through a spray can during high-speed stirring, after spraying, carrying out high-speed stirring for 15min to ensure that the interface modifier is uniformly distributed in the filler, and drying the filler in an air-blowing drying box at the temperature of 80 ℃ with the absolute ethyl alcohol solvent.
Putting the dried material and 20 parts of resol into a high-speed dry powder mixer, stirring at a high speed for 3min, taking out, manually stirring for 3min, uniformly spreading the material on the surface of a lower die paved with a release film, closing the die, putting the die into a flat vulcanizing machine at 170 ℃ for preheating for 5min, loading 15MPa pressure to cure for 10min at high temperature and high pressure, curing for 5min at a high pressure, and releasing micromolecule gas generated in the resin curing process in a split pressure manner. Fully cooling at 20 ℃ and taking out the solidified and molded composite material.
Example 2
The method comprises the steps of putting asphalt-based carbon fibers into 100ML absolute ethyl alcohol solution, adding a sealing film for sealing, cleaning for 30min under the power of 100W of an ultrasonic cleaning machine, washing and filtering for three times by using absolute ethyl alcohol, adding a proper amount of HEC dispersing agent into the carbon fibers, stirring for 30min at the rotating speed of 800r/min, drying at 60 ℃ subsequently, removing surface sizing agent, and carrying out hydrophilic treatment on the surfaces of the carbon fibers to enhance interface bonding.
Premixing 60 parts of natural crystalline flake graphite and 15 parts of treated asphalt-based carbon fiber filler, spraying 3 parts of titanate coupling agent pre-dissolved in No. 5 white oil according to a ratio of 1:1 through a spray can during high-speed stirring, after spraying, carrying out high-speed stirring for 15min to ensure that the interface modifier is uniformly distributed in the filler, and drying the filler in a 100 ℃ forced air drying oven by using an absolute ethyl alcohol solvent.
Putting the dried material and 15 parts of resol into a high-speed dry powder mixer, stirring at a high speed for 3min, taking out, manually stirring for 3min, uniformly spreading the mixture on the surface of a lower die with a release film, closing the die, putting the die into a flat vulcanizing machine at 170 ℃ for preheating for 5min, loading 15MPa pressure, curing at high temperature and high pressure for 10min, curing at high pressure for 5min, and releasing micromolecule gas generated in the resin curing process in a split pressure manner. Cooling at 20 deg.c to take out the cured composite material.
Example 3
The method comprises the steps of putting asphalt-based carbon fibers into 100ML absolute ethyl alcohol solution, adding a sealing film for sealing, cleaning for 30min under the power of 100W of an ultrasonic cleaning machine, washing and filtering for three times by using absolute ethyl alcohol, adding a proper amount of HEC dispersing agent into the carbon fibers, stirring for 30min at the rotating speed of 800r/min, and then drying at 60 ℃ to remove surface sizing agent and carrying out hydrophilic treatment on the surfaces of materials to enhance interface bonding.
Premixing 70 parts of natural crystalline flake graphite and 10 parts of treated asphalt-based carbon fiber filler, spraying 2 parts of silane coupling agent pre-dissolved in absolute ethyl alcohol according to a ratio of 1:1 through a spray can during high-speed stirring, after spraying, carrying out high-speed stirring for 15min to ensure that the interface modifier is uniformly distributed in the filler, and drying the filler in an absolute ethyl alcohol solvent in a blowing drying box at the temperature of 80 ℃.
Putting the dried material and 10 parts of resol into a high-speed dry powder mixer, stirring at a high speed for 3min, taking out, manually stirring for 3min, uniformly spreading the mixture on the surface of a lower die paved with a release film, closing the die, putting the die into a flat vulcanizing machine at 170 ℃ for preheating for 5min, loading 15MPa pressure to cure for 10min at high temperature and high pressure, curing for 5min at high pressure, and releasing micromolecule gas generated in the resin curing process in a split pressure manner. Cooling at 20 deg.c to take out the cured composite material.
Example 4
The method comprises the steps of putting asphalt-based carbon fibers into 100ML absolute ethyl alcohol solution, adding a sealing film for sealing, cleaning for 30min under the power of 100W of an ultrasonic cleaning machine, washing and filtering for three times by using absolute ethyl alcohol, adding a proper amount of HEC dispersing agent into the carbon fibers, stirring for 30min at the rotating speed of 800r/min, and then drying at 60 ℃ to remove surface sizing agent and carrying out hydrophilic treatment on the surfaces of materials to enhance interface bonding.
Premixing 80 parts of natural crystalline flake graphite and 5 parts of treated asphalt-based carbon fiber filler, spraying 2 parts of titanate coupling agent pre-dissolved in No. 5 white oil according to a ratio of 1:1 through a spraying pot during high-speed stirring, after spraying, carrying out high-speed stirring for 15min to ensure that the interface modifier is uniformly distributed in the filler, and drying the filler in a 100 ℃ forced air drying oven by using an absolute ethyl alcohol solvent.
Putting the dried material and 5 parts of resol into a high-speed dry powder mixer, stirring at a high speed for 3min, taking out, manually stirring for 3min, uniformly spreading the mixture on the surface of a lower die with a release film, closing the die, putting the die into a flat vulcanizing machine at 170 ℃ for preheating for 5min, loading a pressure of 15MPa, curing at a high temperature and a high pressure for 10min, curing at a high pressure for 5min, releasing pressure in the middle, and releasing micromolecule gas generated in the resin curing process. Cooling at 20 deg.c to take out the cured composite material.
Example 5
The method comprises the steps of putting asphalt-based carbon fibers into 100ML absolute ethyl alcohol solution, adding a sealing film for sealing, cleaning for 30min under the power of 100W of an ultrasonic cleaning machine, washing and filtering for three times by using absolute ethyl alcohol, adding a proper amount of HEC dispersing agent into the carbon fibers, stirring for 30min at the rotating speed of 800r/min, and then drying at 60 ℃ to remove surface sizing agent and carrying out hydrophilic treatment on the surfaces of materials to enhance interface bonding.
Premixing 85 parts of natural crystalline flake graphite and 2 parts of treated asphalt-based carbon fiber filler, spraying 2 parts of silane coupling agent pre-dissolved in absolute ethyl alcohol according to a ratio of 1:1 through a spray can during high-speed stirring, after spraying, carrying out high-speed stirring for 15min to ensure that the interface modifier is uniformly distributed in the filler, and drying the filler in an absolute ethyl alcohol solvent in a blowing drying box at the temperature of 80 ℃.
Putting the dried material and 5 parts of resol into a high-speed dry powder mixer, stirring at a high speed for 3min, taking out, manually stirring for 3min, uniformly spreading the mixture on the surface of a lower die with a release film, closing the die, putting the die into a flat vulcanizing machine at 170 ℃ for preheating for 5min, loading a pressure of 15MPa, curing at a high temperature and a high pressure for 10min, curing at a high pressure for 5min, releasing pressure in the middle, and releasing micromolecule gas generated in the resin curing process. Cooling at 20 deg.c to take out the cured composite material.
Example 6
The method comprises the steps of putting asphalt-based carbon fibers into 100ML absolute ethyl alcohol solution, adding a sealing film for sealing, cleaning for 30min under the power of 100W of an ultrasonic cleaning machine, washing and filtering for three times by using absolute ethyl alcohol, adding a proper amount of HEC dispersing agent into the carbon fibers, stirring for 30min at the rotating speed of 800r/min, and then drying at 60 ℃ to remove surface sizing agent and carrying out hydrophilic treatment on the surfaces of materials to enhance interface bonding.
Premixing 90 parts of natural crystalline flake graphite and 2 parts of treated asphalt-based carbon fiber filler, spraying 2 parts of silane coupling agent pre-dissolved in absolute ethyl alcohol according to a ratio of 1:1 through a spray can during high-speed stirring, after spraying, carrying out high-speed stirring for 15min to ensure that the interface modifier is uniformly distributed in the filler, and drying the filler in an absolute ethyl alcohol solvent in a blowing drying box at the temperature of 80 ℃.
Putting the dried material and 2 parts of resol into a high-speed dry powder mixer, stirring at a high speed for 3min, taking out, manually stirring for 3min, uniformly spreading the mixture on the surface of a lower die paved with a release film, closing the die, putting the die into a flat vulcanizing machine at 170 ℃ for preheating for 5min, loading a pressure of 15MPa, curing at a high temperature and a high pressure for 10min, curing at a high pressure for 5min, and releasing micromolecule gas generated in the resin curing process in a split pressure manner. Cooling at 20 deg.c to take out the cured composite material.
The performance tests of the thermally conductive composites obtained in examples 1-6 are shown in the following table:
the heat-conducting composite materials prepared in the embodiments 1 to 6 and capable of being rapidly molded are respectively coated on electronic devices or manufactured into electronic portable equipment device shells, so that the materials can achieve rapid heat dissipation while excellent mechanical properties are guaranteed, and the heat-conducting composite materials have wide application and infinite development prospects in the field of heat dissipation.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. The rapidly-formed anisotropic heat-conducting composite material is characterized by being prepared from the following raw materials in parts by mass:
50-90 parts of graphite filler;
2-20 parts of carbon fiber filler;
2-20 parts of a high-molecular polymer matrix;
1-3 parts of an interface modifier;
1-3 parts of an organic solvent.
2. The anisotropic thermal conductive composite of claim 1, wherein the high molecular polymer matrix is one or more of epoxy resin, polyvinylidene fluoride, phenolic resin, silicone rubber, and polyethylene.
3. The anisotropic thermal conductive composite of claim 1, wherein the graphite filler is one or more of natural flake graphite, carbon black, expandable graphite, and expanded graphite.
4. The anisotropic thermal conductive composite of claim 1, wherein the carbon fiber filler is 300 mesh pitch-based highly thermally conductive carbon fiber with a diameter of 7 μm.
5. The anisotropic thermal conductive composite of claim 1, wherein the interfacial modifier is one or more of a silane coupling agent, a titanate coupling agent, and dopamine hydrochloride.
6. The anisotropic thermal conductive composite of claim 1, wherein the organic solvent is one of ethanol, methanol, and a mixture of water and alcohol.
7. A method for preparing a rapidly prototyping anisotropic thermal conductive composite as in any of claims 1 to 6, comprising the steps of:
dispersing and cleaning the carbon fiber filler by using an organic solvent;
premixing the carbon fiber filler and the graphite filler, then stirring at a high speed, and spraying an interface modifier dissolved in an organic solvent during high-speed stirring to uniformly distribute the interface modifier in the filler;
drying the filler;
mixing and uniformly stirring the dried filler and the high molecular polymer matrix;
and filling the uniformly stirred materials in a mold, preheating and molding the materials on a flat vulcanizing instrument, and taking out the fully cured materials after the materials are fully cured to obtain the anisotropic heat-conducting composite material.
8. The method of claim 7, wherein the interface modifier is injected in an amount of 1-5% by weight of the filler.
9. The method of claim 7, wherein the drying temperature of the filler is 80-100 ℃ and the drying time is 5 hours.
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| CN102850717A (en) * | 2012-09-27 | 2013-01-02 | 北京化工大学 | High thermal conductivity phenolic resin and preparation method |
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| JP2015120848A (en) * | 2013-12-24 | 2015-07-02 | 旭有機材工業株式会社 | Phenol resin molding material and method for producing the same |
| CN107011631A (en) * | 2017-05-25 | 2017-08-04 | 杭州本松新材料技术股份有限公司 | A kind of heat filling containing crystalline flake graphite and preparation method and application |
| JP2019064192A (en) * | 2017-10-03 | 2019-04-25 | 信越化学工業株式会社 | Anisotropic thermally conductive composite silicone rubber sheet and method for producing the same |
| CN111923425A (en) * | 2020-07-28 | 2020-11-13 | 北京化工大学 | Preparation method of high-thermal-conductivity graphite film-carbon fiber resin matrix composite material |
-
2022
- 2022-01-19 CN CN202210058085.3A patent/CN114350107A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102850717A (en) * | 2012-09-27 | 2013-01-02 | 北京化工大学 | High thermal conductivity phenolic resin and preparation method |
| CN103102671A (en) * | 2013-02-20 | 2013-05-15 | 合肥杰事杰新材料股份有限公司 | Heat-conductive and electroconductive PC composite material and preparation method thereof |
| JP2015120848A (en) * | 2013-12-24 | 2015-07-02 | 旭有機材工業株式会社 | Phenol resin molding material and method for producing the same |
| CN107011631A (en) * | 2017-05-25 | 2017-08-04 | 杭州本松新材料技术股份有限公司 | A kind of heat filling containing crystalline flake graphite and preparation method and application |
| JP2019064192A (en) * | 2017-10-03 | 2019-04-25 | 信越化学工業株式会社 | Anisotropic thermally conductive composite silicone rubber sheet and method for producing the same |
| CN111923425A (en) * | 2020-07-28 | 2020-11-13 | 北京化工大学 | Preparation method of high-thermal-conductivity graphite film-carbon fiber resin matrix composite material |
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Application publication date: 20220415 |