CN114456603A - Magnetic field induction arrangement carbon fiber heat conduction material and preparation method thereof - Google Patents
Magnetic field induction arrangement carbon fiber heat conduction material and preparation method thereof Download PDFInfo
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- CN114456603A CN114456603A CN202210102031.2A CN202210102031A CN114456603A CN 114456603 A CN114456603 A CN 114456603A CN 202210102031 A CN202210102031 A CN 202210102031A CN 114456603 A CN114456603 A CN 114456603A
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 77
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 77
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 239000000463 material Substances 0.000 title claims abstract description 37
- 230000006698 induction Effects 0.000 title claims abstract description 12
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 229920000642 polymer Polymers 0.000 claims abstract description 15
- 239000003054 catalyst Substances 0.000 claims abstract description 10
- 239000011159 matrix material Substances 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 239000006185 dispersion Substances 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000005485 electric heating Methods 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 4
- 239000008247 solid mixture Substances 0.000 claims abstract description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 8
- PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerol group Chemical group OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- 239000011302 mesophase pitch Substances 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 5
- 229920002545 silicone oil Polymers 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 229940045985 antineoplastic platinum compound Drugs 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- VYKXQOYUCMREIS-UHFFFAOYSA-N methylhexahydrophthalic anhydride Chemical compound C1CCCC2C(=O)OC(=O)C21C VYKXQOYUCMREIS-UHFFFAOYSA-N 0.000 claims description 2
- 150000003058 platinum compounds Chemical class 0.000 claims description 2
- 229920002379 silicone rubber Polymers 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 1
- 239000004945 silicone rubber Substances 0.000 claims 1
- 238000010907 mechanical stirring Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 238000001132 ultrasonic dispersion Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007605 air drying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/28—Treatment by wave energy or particle radiation
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
- C08J2383/07—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
Abstract
A magnetic field induction arrangement carbon fiber heat conduction material and a preparation method thereof relate to the technical field of heat management. The magnetic field induced arrangement carbon fiber heat conduction material comprises 5-80% of carbon fibers, 10-85% of a polymer matrix, 5-15% of a curing agent, 5-15% of a film forming agent and 0.1-1% of a catalyst by mass. The method comprises the following steps: adding 5-80% of carbon fiber into a polymer matrix, mechanically stirring, and ultrasonically dispersing to obtain a dispersion; adding a film-forming agent and a catalyst into the dispersion, and then mechanically stirring for less than or equal to 1min to obtain a mixture; transferring the mixture to a glass or other non-magnetic container; transferring the container and the mixture into a magnetic field, wherein one surface of the container is vertical to the magnetic induction direction, the mixture is changed from a liquid state to a solid state, and the magnetic field is removed; and transferring the solid mixture to an electric heating constant-temperature air blast drying oven, and further heating and curing to obtain the oriented carbon fiber heat conduction material.
Description
Technical Field
The invention relates to the technical field of heat management, in particular to a magnetic field induced arrangement carbon fiber heat conduction material and a preparation method thereof.
Background
With the increasing density of electronic devices, the problem of heat conduction becomes a topic of concern in the field of materials and electronic industry, and the thermal interface material connecting the device and the heat sink becomes the key of heat conduction of the device. At present, the thermal interface materials mainly used are heat-conducting silicone grease, heat-conducting gaskets and the like, most of the materials are doped with metal nitrides, metal oxides and the like for heat conduction, the heat conductivity of the materials is low, and a high-heat-conductivity thermal interface material needs to be designed. In addition, the light weight is rapidly developed, the traditional metal material is replaced by the polymer in many occasions, but the polymer has low thermal conductivity, the application of the polymer is influenced, and the problem of low thermal conductivity is urgently needed to be solved
Mesophase pitch-based carbon fibers as a fiber consisting of carbon atoms in sp2The hybrid tracks form a hexagonal honeycomb lattice structure carbon material, the orientation degree is high, the heat conducting performance is excellent, the axial heat conductivity of the mesophase pitch-based carbon fiber reaches 900W/(m.K), and the material is tens of times of that of a common heat conducting material. Therefore, the carbon fiber composite heat conduction material is expected to realize extremely high heat conduction performance. However, carbon fibers have high axial thermal conductivity and low radial thermal conductivity. Generally, the arrangement of carbon fibers in the carbon fiber composite material is disordered, the excellent performance of high axial thermal conductivity of the carbon fibers cannot be fully exerted, and the thermal conductivity of the carbon fiber composite material is only 1-5W/(m.K). Therefore, it is a problem to be solved to design a high thermal conductivity composite material with aligned carbon fibers.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a magnetic field induced arrangement carbon fiber heat conduction material and a preparation method thereof, wherein the preparation method is simple and convenient and is easy to popularize.
The carbon fiber heat conduction material arranged by magnetic field induction comprises 5-80% of carbon fiber by mass, 10-85% of polymer matrix, 5-15% of curing agent, 5-15% of film forming agent and 0.1-1% of catalyst.
The carbon fiber is mesophase pitch-based carbon fiber, the diameter can be 5-10 mu m, and the length can be 25-200 mu m.
The polymer matrix is one of polyvinyl alcohol, vinyl silicone oil and silicon rubber.
The film forming agent can be selected from glycerol and absolute ethyl alcohol.
The curing agent can be selected from hydrogen-containing silicone oil and methylhexahydrophthalic anhydride.
The catalyst may be selected from platinum compounds.
The preparation method of the magnetic field induction arrangement carbon fiber heat conduction material comprises the following steps:
1) adding 5-80% of carbon fiber into a polymer matrix, mechanically stirring, and ultrasonically dispersing to obtain a dispersion;
2) adding a film-forming agent and a catalyst into the dispersion, and then mechanically stirring for less than or equal to 1min to obtain a mixture;
3) transferring the mixture to a glass or other non-magnetic container;
4) transferring the container and the mixture into a magnetic field, wherein one surface of the container is vertical to the magnetic induction direction, the mixture is changed from a liquid state to a solid state, and the magnetic field is removed;
5) and transferring the solid mixture to an electric heating constant-temperature air blast drying oven, and further heating and curing to obtain the oriented carbon fiber heat conduction material.
In the step 4), the magnetic induction intensity of the magnetic field is 0.3-7 Tesla, and the carbon fibers need to be directionally arranged in the magnetic field for the composite material.
The principle and the beneficial effects of the invention are as follows:
1) the invention dissolves the carbon fiber in the polymer by mechanical stirring, and the carbon fiber can uniformly and stably exist in the polymer without a dispersing agent.
2) The carbon fiber solution is placed in a magnetic field, and due to the Landau diamagnetism of the carbon fibers, the carbon fibers rotate in the magnetic field, so that the carbon fibers are converted from a high energy state to a low energy state until the axes of the carbon fibers are parallel to the direction of the external magnetic field, the energy reaches the lowest state, the carbon fibers are directionally arranged in the polymer matrix, the axial high heat conductivity characteristic of the carbon fibers is fully utilized, and the heat conductivity of the directionally arranged carbon fiber heat conduction material is far higher than that of other common carbon fiber heat conduction materials under the same addition amount.
3) The preparation method is simple and convenient and is easy to popularize.
Drawings
Fig. 1 is a scanning electron microscope representation of an oriented carbon fiber heat conducting material prepared according to an embodiment of the present invention. The carbon fibers are regularly arranged and are parallel to the direction of an external magnetic field.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Referring to fig. 1, a preparation method of an oriented carbon fiber heat conduction material comprises 5% -80% of carbon fibers, wherein the carbon fibers are 5-10 μm in diameter, 25-200 nm in length, 10% -85% of polyvinyl alcohol, 5% -15% of film forming agent and magnet (magnetic induction intensity is 0.3-0.5 tesla), according to the proportioning of the above components by weight, firstly, dissolving polyvinyl alcohol with deionized water to obtain polyvinyl alcohol solution, sequentially adding the carbon fibers and the film forming agent into the polyvinyl alcohol solution, carrying out mechanical stirring and ultrasonic dispersion, placing the mixture in a magnetic field, carrying out oriented arrangement on the carbon fibers, and drying to obtain the high heat conduction composite material. The oriented carbon fiber heat conduction material adopts mesophase pitch-based carbon fibers as raw materials, and adopts simple methods such as mechanical stirring and mixing, ultrasonic dispersion, stone carbon fiber magnetic field induced orientation and the like to prepare the high-performance heat conduction material by using a plurality of steps.
The preparation flow of the oriented carbon fiber heat conduction material is as follows:
a. adding 60% of carbon fiber and 5% -15% of film forming agent into polyvinyl alcohol solution, mechanically stirring, and ultrasonically dispersing;
b. transferring the mixture to a glass or other non-magnetic container;
c. transferring the container and the mixture into a magnetic field, wherein one surface of the container is vertical to the direction of the magnetic field, the mixture is changed from a liquid state to a solid state, and moving out of the magnetic field;
d. and transferring the solid mixture to an electric heating constant-temperature air drying oven, and further heating and curing.
e. The thermal conductivity of the high-orientation-arrangement carbon fiber heat conduction material reaches 65W/(m.K).
Specific examples are given below.
Example 1
The oriented carbon fiber heat conducting material comprises 10% of carbon fibers, 84% of vinyl silicone oil, 5% of curing agent and 1% of catalyst. The carbon fiber has a diameter of 10 μm and a length of 25 μm.
Example 2
An oriented carbon fiber heat conduction material comprises 5% of carbon fibers, 85% of polyvinyl alcohol and 10% of film forming agents. The fiber has a diameter of 5 μm and a length of 200 μm.
Example 3
An oriented carbon fiber heat conduction material comprises 80% of carbon fibers, 10% of polyvinyl alcohol and 10% of a film forming agent. The fibers had a diameter of 5 μm and a length of 25 um.
Example 4
An oriented carbon fiber heat conduction material comprises 50% of carbon fibers, 35% of polyvinyl alcohol and 15% of a film forming agent. The fiber has a diameter of 10 μm and a length of 100 um.
The invention adds carbon fiber and polymer matrix into a container, carries out mechanical stirring and ultrasonic dispersion, adds film-forming agent or curing agent and catalyst, places the mixture in a magnetic field, and arranges the carbon fiber in the magnetic field in an oriented way to obtain the high heat-conducting composite material. The oriented carbon fiber heat conduction material adopts mesophase pitch-based carbon fibers as raw materials, adopts simple methods such as mechanical stirring and mixing, ultrasonic dispersion, carbon fiber magnetic field induced orientation and the like, and prepares a high-performance thermal interface material by simple steps.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, which are exemplary rather than limiting, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.
Claims (8)
1. The magnetic field induced arrangement carbon fiber heat conduction material is characterized by comprising 5-80% of carbon fibers, 10-85% of a polymer matrix, 5-15% of a curing agent, 5-15% of a film forming agent and 0.1-1% of a catalyst by mass.
2. The heat conductive material of claim 1, wherein the carbon fibers are mesophase pitch-based carbon fibers, have a diameter of 5 to 10 μm and a length of 25 to 200 μm.
3. The thermally conductive magnetic field induced aligned carbon fiber material of claim 1, wherein said polymer matrix is one of polyvinyl alcohol, vinyl silicone oil, and silicone rubber.
4. The magnetic field induced alignment carbon fiber thermal conductive material of claim 1, wherein said film former is selected from the group consisting of glycerol and absolute ethanol.
5. The thermally conductive magnetic field-induced alignment carbon fiber material of claim 1, wherein said curing agent is selected from the group consisting of hydrogen-containing silicone oil and methylhexahydrophthalic anhydride.
6. The thermally conductive magnetic field-induced alignment carbon fiber material of claim 1, wherein said catalyst is selected from the group consisting of platinum compounds.
7. A preparation method of a magnetic field induction arrangement carbon fiber heat conduction material is characterized by comprising the following steps:
1) adding 5-80% of carbon fiber into a polymer matrix, mechanically stirring, and ultrasonically dispersing to obtain a dispersion;
2) adding a film-forming agent and a catalyst into the dispersion, and mechanically stirring for less than or equal to 1min to obtain a mixture;
3) transferring the mixture to a glass or other non-magnetic container;
4) transferring the container and the mixture into a magnetic field, wherein one surface of the container is vertical to the magnetic induction direction, the mixture is changed from a liquid state to a solid state, and moving out of the magnetic field;
5) and transferring the solid mixture to an electric heating constant-temperature air blowing drying oven for heating and curing to obtain the oriented carbon fiber heat conduction material.
8. The method for preparing the magnetic field induced arrangement carbon fiber heat conduction material according to claim 7, wherein in the step 4), the magnetic induction intensity of the magnetic field is 0.3-7 Tesla, and the composite material orients the carbon fibers in the magnetic field.
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| CN202210102031.2A CN114456603A (en) | 2022-01-27 | 2022-01-27 | Magnetic field induction arrangement carbon fiber heat conduction material and preparation method thereof |
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| CN202210102031.2A CN114456603A (en) | 2022-01-27 | 2022-01-27 | Magnetic field induction arrangement carbon fiber heat conduction material and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115448745A (en) * | 2022-09-21 | 2022-12-09 | 亚太中碳(山西)新材料科技有限公司 | Preparation method of oriented heat-conducting and electric-conducting graphite carbon film and oriented heat-conducting carbon piece |
| CN115558241A (en) * | 2022-10-17 | 2023-01-03 | 厦门大学 | High-thermal-conductivity carbon fiber fabric composite material and preparation method thereof |
| CN115725095A (en) * | 2022-11-17 | 2023-03-03 | 重庆大学 | Thermal interface material with 'bi-directional' heat conduction channel and preparation method thereof |
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| CN115448745A (en) * | 2022-09-21 | 2022-12-09 | 亚太中碳(山西)新材料科技有限公司 | Preparation method of oriented heat-conducting and electric-conducting graphite carbon film and oriented heat-conducting carbon piece |
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| CN115558241A (en) * | 2022-10-17 | 2023-01-03 | 厦门大学 | High-thermal-conductivity carbon fiber fabric composite material and preparation method thereof |
| CN115725095A (en) * | 2022-11-17 | 2023-03-03 | 重庆大学 | Thermal interface material with 'bi-directional' heat conduction channel and preparation method thereof |
| CN115725095B (en) * | 2022-11-17 | 2024-04-19 | 重庆大学 | Thermal interface material with 'bi-directional' heat conduction channel and preparation method thereof |
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Application publication date: 20220510 |