CN117903634A - Low-thermal-resistance tearing and electric-breakdown-resistant composite heat-conducting phase-change material and preparation method thereof - Google Patents
Low-thermal-resistance tearing and electric-breakdown-resistant composite heat-conducting phase-change material and preparation method thereof Download PDFInfo
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- CN117903634A CN117903634A CN202311854637.2A CN202311854637A CN117903634A CN 117903634 A CN117903634 A CN 117903634A CN 202311854637 A CN202311854637 A CN 202311854637A CN 117903634 A CN117903634 A CN 117903634A
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- 239000012782 phase change material Substances 0.000 title claims abstract description 93
- 239000002131 composite material Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 44
- 238000000576 coating method Methods 0.000 claims abstract description 44
- 229920001721 polyimide Polymers 0.000 claims abstract description 27
- 230000015556 catabolic process Effects 0.000 claims abstract description 24
- 239000000945 filler Substances 0.000 claims abstract description 21
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 20
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 15
- 229920006124 polyolefin elastomer Polymers 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000007822 coupling agent Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 6
- 239000003575 carbonaceous material Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 150000004645 aluminates Chemical class 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000002530 phenolic antioxidant Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 19
- 239000002245 particle Substances 0.000 description 18
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 10
- 239000012188 paraffin wax Substances 0.000 description 10
- 239000011787 zinc oxide Substances 0.000 description 10
- SCPWMSBAGXEGPW-UHFFFAOYSA-N dodecyl(trimethoxy)silane Chemical compound CCCCCCCCCCCC[Si](OC)(OC)OC SCPWMSBAGXEGPW-UHFFFAOYSA-N 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 230000007704 transition Effects 0.000 description 9
- 239000001993 wax Substances 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000003851 corona treatment Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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Abstract
The invention relates to a low-thermal-resistance tearing and electric breakdown-resistant composite heat-conducting phase-change material and a preparation method thereof, belonging to the technical field of heat-conducting phase-change materials; the adhesive comprises the following components in parts by weight: 5-10 parts of base resin, 0.5-1.5 parts of phase-change wax, 80-90 parts of filler, 1-3 parts of coupling agent and 0.1-0.5 part of antioxidant; the base resin is polyolefin rubber with a molecular weight of 1000-5000; the composite heat-conducting phase-change material is prepared by coating the heat-conducting phase-change material on two sides of the polyimide film with excellent mechanical property and electrical property, controlling the use parts of the base resin and the phase-change wax of the phase-change material and the ratio between the base resin and the phase-change wax, the consumption of the filling agent, the thickness of the phase-change coating and the thickness of the polyimide film, solves the problems of low strength, easy tearing, insufficient insulativity and easy breakdown of the traditional heat-conducting phase-change material, and can be used in the conditions of larger external force effect and some high-pressure scenes.
Description
Technical Field
The invention relates to a low-thermal-resistance tearing and electric-breakdown-resistant composite heat-conducting phase-change material and a preparation method thereof, and belongs to the technical field of heat-conducting phase-change materials.
Background
The heat-conducting phase-change material is solid at room temperature, has certain fluidity after exceeding the phase-change temperature, can be very thin under certain pressure, realizes very low BLT (bonding layer thickness), and can wet and fill gaps between a heat source and a radiator, so that the heat-conducting phase-change material has lower thermal resistance compared with heat-conducting gel and a heat-conducting gasket.
However, compared with the heat-conducting gasket and the heat-conducting gel, the heat-conducting phase-change material belongs to a 'non-crosslinked' or 'micro-crosslinked' system, the strength of the heat-conducting phase-change material is generally lower, and the heat-conducting phase-change material is easy to tear under the action of external force; in addition, in some high-voltage application scenarios, the thermally conductive phase change material is easy to generate electric breakdown, and these limit the application of the thermally conductive phase change material.
Disclosure of Invention
The invention provides a low-thermal-resistance tearing and electric-breakdown-resistant composite heat-conducting phase-change material and a preparation method thereof, which solve the technical problems in the prior art.
The technical scheme provided by the invention is as follows:
The invention aims at providing a low-thermal-resistance tearing and electric-breakdown-resistant composite heat-conducting phase-change material, which comprises the following components in parts by weight: 5-10 parts of base resin, 0.5-1.5 parts of phase-change wax, 80-90 parts of filler, 1-3 parts of coupling agent and 0.1-0.5 part of antioxidant.
Based on the technical scheme, the invention can also be improved as follows:
Further, the base resin is polyolefin rubber with a molecular weight of 1000-5000.
The further scheme has the beneficial effects that if the molecular weight of the polyolefin rubber is lower than 1000, the strength of the phase-change coating is too low, and the release film is removed (the release film covers the surface of the phase-change coating to play an isolating protection role) so as to easily cause material dropping; if the molecular weight is higher than 5000, the surface tackiness of the phase-change coating is too low, the interface adhesion with the polyimide film is insufficient and the adhesion to the surface of the radiator is difficult.
Further, the phase-change wax is solid paraffin with a general formula C nH2n+2 (the value range of n is 20-40), and the phase-change temperature is 40-70 ℃.
Further, the mass ratio of the base resin to the phase-change wax is 4:1-10:1.
The further scheme has the beneficial effects that if the proportion is larger than 10:1, the strength of the phase-change coating is too low, and the release film is easy to drop when being torn off; if the ratio is less than 4:1, the surface viscosity of the phase-change coating is too low, the interface adhesion with the polyimide film is insufficient, and the phase-change coating is difficult to attach to the surface of the radiator.
Further, the filler is one or more of ceramic, metal and carbon materials.
Further, the ceramic comprises aluminum oxide, zinc oxide, aluminum nitride, boron nitride; the metal comprises silver, nickel and copper; the carbon material comprises graphite and carbon black.
The adoption of the further scheme has the beneficial effects that the content of the filler influences the heat conductivity, the heat resistance and the viscosity of the phase-change material, so that the content of the filler in the composite heat-conducting phase-change material needs to be controlled, and if the addition amount is too low, the heat conductivity of the phase-change material is low, and the heat resistance of the composite phase-change material is high; if the addition amount is too high, the viscosity of the phase change material is higher, and the thermal resistance is higher.
Further, the coupling agent is one or more of silane coupling agent, titanate coupling agent, aluminate coupling agent and zirconate coupling agent.
Further, the antioxidants include phenolic antioxidants, aminic antioxidants, or any other suitable type of antioxidants or combinations thereof.
The adoption of the further scheme has the beneficial effects that the antioxidant can capture and neutralize free radicals and reduce the oxidization of the resin matrix.
The second purpose of the invention is to provide a preparation method of the low-thermal-resistance tearing and electric breakdown-resistant composite heat-conducting phase-change material, which comprises the following steps:
s1, stirring 5-10 parts of base resin, 0.5-1.5 parts of phase-change wax and 0.1-0.5 part of antioxidant in vacuum at 100-120 ℃ to be in a uniform state, adding 1-3 parts of coupling agent, stirring to be in a uniform state, and finally adding 80-90 parts of filler, stirring to be in a uniform state to obtain a phase-change material;
And S2, heating and coating the obtained phase-change material on two sides of the polyimide film to obtain the composite heat-conducting phase-change material.
Further, in the step S2, the polyimide film is a double-sided corona-treated film having a thickness of 20 to 60 μm.
The adoption of the further scheme has the beneficial effects that if the thickness of the polyimide film is lower than 20 mu m, the tearing strength and breakdown voltage resistance of the composite phase change material are insufficient; if the thickness of the polyimide film is higher than 60 mu m, the thermal resistance of the composite phase change material is too high; if the surface of the polyimide film is not subjected to double-sided corona treatment, the interface adhesion between the polyimide film and the phase-change coating is insufficient, and the material dropping condition is easy to occur.
Further, in the step S2, the thickness of the single-sided phase-change coating layer is 10-60 μm.
The further scheme has the beneficial effects that if the thickness of the phase-change coating is lower than 10 mu m, errors in thickness during calendaring coating can possibly cause that part of polyimide film surface is not covered with the coating, the strength of the phase-change coating is too low, and material dropping easily occurs when the release film is removed. If the thickness of the phase-change coating is higher than 60 μm, the cost of the product increases and the thermal resistance becomes higher.
Further, in the step S2, the heating temperature is 100 to 120 ℃.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
1. According to the invention, the heat-conducting phase-change material is coated on two sides of the polyimide film with excellent mechanical property and electrical property, and the composite heat-conducting phase-change material is prepared by controlling the parts of the base resin of the phase-change material and the phase-change wax and the ratio between the base resin and the phase-change wax, the consumption of the filler, the thickness of the phase-change coating and the thickness of the polyimide film, so that the problems of low strength, easiness in tearing, insufficient insulativity and easiness in breakdown of the traditional heat-conducting phase-change material are solved.
2. The composite heat-conducting phase-change material prepared by the invention has the performances of high strength, tear resistance, high electric breakdown strength and electric breakdown resistance on the basis of keeping low heat resistance, and can be used in the scenes of larger external force effect and high voltage.
Detailed Description
The principles and features of the present invention are described below with reference to examples, which are provided for illustration only and are not intended to limit the scope of the invention in which the parts are by weight.
Example 1
A preparation method of a low-thermal-resistance tearing and electric-breakdown-resistant composite heat-conducting phase-change material comprises the following steps:
S1, 8 parts of polyolefin rubber with the molecular weight of 1000, 1 part of paraffin with the phase transition temperature of 50 ℃ and 0.1 part of antioxidant (Basf 1076) are stirred to be in a uniform state in vacuum at the temperature of 100 ℃,2 parts of dodecyl trimethoxy silane coupling agent is added and stirred to be in a uniform state, and 88.9 parts of filler (aluminum oxide with the particle size of 5 mu m and zinc oxide with the particle size of 1 mu m, and the ratio of 2:1) are added and stirred to be in a uniform state, so that a phase-change material is obtained;
s2, heating and coating the phase change material at 100 ℃ on two sides of a double-sided corona polyimide film with the thickness of 50 mu m, and coating the phase change material with the thickness of 40 mu m on one side to obtain the composite heat conduction phase change material.
Comparative example 1
A preparation method of a composite heat-conducting phase-change material comprises the following steps:
S1, stirring 8 parts of polyolefin rubber with the molecular weight of 1000, 1 part of paraffin with the phase transition temperature of 50 ℃ and 0.1 part of antioxidant (Basf 1076) in vacuum at the temperature of 100 ℃ to be in a uniform state, adding 2 parts of dodecyl trimethoxy silane coupling agent, stirring to be in a uniform state, and finally adding 88.9 parts of filler (aluminum oxide with the particle size of 5 mu m and zinc oxide with the particle size of 1 mu m in a ratio of 2:1) and stirring to be in a uniform state to obtain a phase-change material;
s2, heating and coating the phase change material at 100 ℃ on two sides of the polyimide film which is not subjected to corona treatment and has the thickness of 50 mu m, and coating the polyimide film with the thickness of 40 mu m on one side to obtain the composite heat conduction phase change material.
Comparative example 2
A preparation method of a composite heat-conducting phase-change material comprises the following steps:
S1, 8 parts of polyolefin rubber with molecular weight of 500, 1 part of paraffin with phase transition temperature of 50 ℃ and 0.1 part of antioxidant (Basf 1076) are stirred to be in a uniform state in vacuum at 100 ℃,2 parts of dodecyl trimethoxy silane coupling agent is added and stirred to be in a uniform state, and 88.9 parts of filler (aluminum oxide with particle size of 5 mu m and zinc oxide with particle size of 1 mu m in a ratio of 2:1) is added and stirred to be in a uniform state, so as to obtain a phase-change material;
s2, heating and coating the phase change material at 100 ℃ on two sides of a double-sided corona polyimide film with the thickness of 50 mu m, and coating the phase change material with the thickness of 40 mu m on one side to obtain the composite heat conduction phase change material.
Comparative example 3
A preparation method of a composite heat-conducting phase-change material comprises the following steps:
S1, stirring 8 parts of polyolefin rubber with molecular weight 7000, 1 part of paraffin with phase transition temperature of 50 ℃ and 0.1 part of antioxidant (Basf 1076) in vacuum at 100 ℃ to be in a uniform state, adding 2 parts of dodecyl trimethoxy silane coupling agent, stirring to be in a uniform state, and finally adding 88.9 parts of filler (aluminum oxide with particle size of 5 mu m and zinc oxide with particle size of 1 mu m in a ratio of 2:1) and stirring to be in a uniform state to obtain a phase-change material;
s2, heating and coating the phase change material at 100 ℃ on two sides of a double-sided corona polyimide film with the thickness of 50 mu m, and coating the phase change material with the thickness of 40 mu m on one side to obtain the composite heat conduction phase change material.
Comparative example 4
A preparation method of a composite heat-conducting phase-change material comprises the following steps:
S1, stirring 2.6 parts of polyolefin rubber with the molecular weight of 1000, 0.3 part of paraffin with the phase transition temperature of 50 ℃ and 0.1 part of antioxidant (Basf 1076) to be in a uniform state at 100 ℃ in vacuum, adding 2 parts of dodecyl trimethoxy silane coupling agent, stirring to be in a uniform state, and finally adding 95 parts of filler (aluminum oxide with the particle size of 5 mu m and zinc oxide with the particle size of 1 mu m in a ratio of 2:1) and stirring to be in a uniform state to obtain a phase-change material;
s2, heating and coating the phase change material at 100 ℃ on two sides of a double-sided corona polyimide film with the thickness of 50 mu m, and coating the phase change material with the thickness of 40 mu m on one side to obtain the composite heat conduction phase change material.
Comparative example 5
A preparation method of a composite heat-conducting phase-change material comprises the following steps:
S1, stirring 8 parts of polyolefin rubber with the molecular weight of 1000, 1 part of paraffin with the phase transition temperature of 50 ℃ and 0.1 part of antioxidant (Basf 1076) in vacuum at the temperature of 100 ℃ to be in a uniform state, adding 2 parts of dodecyl trimethoxy silane coupling agent, stirring to be in a uniform state, and finally adding 88.9 parts of filler (aluminum oxide with the particle size of 5 mu m and zinc oxide with the particle size of 1 mu m in a ratio of 2:1) and stirring to be in a uniform state to obtain a phase-change material;
s2, heating and coating the phase change material at 100 ℃ on two sides of a double-sided corona polyimide film with the thickness of 80 mu m, and coating the single side with the thickness of 40 mu m to obtain the composite heat conduction phase change material.
Comparative example 6
A preparation method of a composite heat-conducting phase-change material comprises the following steps:
S1, stirring 8 parts of polyolefin rubber with the molecular weight of 1000, 1 part of paraffin with the phase transition temperature of 50 ℃ and 0.1 part of antioxidant (Basf 1076) in vacuum at the temperature of 100 ℃ to be in a uniform state, adding 2 parts of dodecyl trimethoxy silane coupling agent, stirring to be in a uniform state, and finally adding 88.9 parts of filler (aluminum oxide with the particle size of 5 mu m and zinc oxide with the particle size of 1 mu m in a ratio of 2:1) and stirring to be in a uniform state to obtain a phase-change material;
S2, heating and coating the phase change material at 100 ℃ on two sides of a double-sided corona polyimide film with the thickness of 10 mu m, and coating the single side with the thickness of 40 mu m to obtain the composite heat conduction phase change material.
Comparative example 7
A preparation method of a composite heat-conducting phase-change material comprises the following steps:
S1, 8.7 parts of polyolefin rubber with the molecular weight of 1000, 0.3 part of paraffin with the phase transition temperature of 50 ℃ and 0.1 part of antioxidant (Basf 1076) are stirred to be in a uniform state in vacuum at the temperature of 100 ℃,2 parts of dodecyl trimethoxy silane coupling agent is added and stirred to be in a uniform state, and finally 88.9 parts of filler (aluminum oxide with the particle size of 5 mu m and zinc oxide with the particle size of 1 mu m in a ratio of 2:1) are added and stirred to be in a uniform state, so that a phase-change material is obtained;
s2, heating and coating the phase change material at 100 ℃ on two sides of a double-sided corona polyimide film with the thickness of 50 mu m, and coating the phase change material with the thickness of 40 mu m on one side to obtain the composite heat conduction phase change material.
Comparative example 8
A preparation method of a composite heat-conducting phase-change material comprises the following steps:
S1, stirring 7 parts of polyolefin rubber with the molecular weight of 1000, 2 parts of paraffin with the phase transition temperature of 50 ℃ and 0.1 part of antioxidant (Basf 1076) at the temperature of 100 ℃ in vacuum until the mixture is in a uniform state, adding 2 parts of dodecyl trimethoxy silane coupling agent, stirring until the mixture is in a uniform state, and finally adding 88.9 parts of filler (aluminum oxide with the particle size of 5 mu m and zinc oxide with the particle size of 1 mu m in a ratio of 2:1) and stirring until the mixture is in a uniform state to obtain a phase-change material;
s2, heating and coating the phase change material at 100 ℃ on two sides of a double-sided corona polyimide film with the thickness of 50 mu m, and coating the phase change material with the thickness of 40 mu m on one side to obtain the composite heat conduction phase change material.
Performance testing was performed on the composite thermally conductive phase change materials prepared in example 1 and comparative examples 1-8:
(1) Thermal resistance test: the thermal resistance was measured by incubating at 80℃for 15min at 50ps i using a thermal resistance meter.
(2) Tear strength test: tear strength was tested using a universal material tester, test standards followed GB/T16578.2-2009.
(3) Electrical breakdown strength test: the breakdown strength was measured using a breakdown strength tester, and the test standard was in compliance with GB/T1408.1-2016.
(4) And (3) operation performance test: and when the release film is removed, observing whether the phase-change coating has a material dropping phenomenon, and when the release film is removed and pulled, observing whether the phase-change coating is debonded with the radiator.
The test results are shown in tables 1 and 2:
Table 1 results of testing the properties of the composite thermally conductive phase change materials of example 1 and comparative examples 1-4
Table 2 test results of the composite thermally conductive phase change material properties of example 1 and comparative examples 5-8
From tables 1 and 2, it can be seen that: the comparative example 1 uses P I film which is not treated by corona, the interfacial bonding force between the phase-change coating and P I film is insufficient, so that the release film is stripped, and compared with the example 1, the thermal resistance is higher, and the breakdown strength is lower; comparative example 2 using a low molecular weight polyolefin rubber, the phase change coating strength was too low resulting in material dropping when the release film was removed; comparative example 3 uses too high a molecular weight polyolefin rubber, resulting in insufficient surface tackiness of the phase-change coating and too high viscosity after phase change, poor adhesion to the heat sink and high thermal resistance; the filler content of comparative example 4 is too high, resulting in insufficient surface viscosity of the phase-change coating, too high viscosity after phase change, poor adhesion to the heat sink and high thermal resistance; comparative example 5 uses a thicker polyimide film, which has high tear strength and high electrical breakdown strength, but also has high thermal resistance; comparative example 6 although the thermal resistance was low, the use of a polyimide film having an excessively low thickness resulted in a lower tear strength and electrical breakdown strength; in comparative example 7, the phase-change wax content was too low, and the strength of the phase-change coating was too low, which resulted in the occurrence of material dropping when the release film was removed, while in comparative example 8, the phase-change wax content was too high, which resulted in insufficient surface tackiness of the phase-change coating, poor adhesion to the heat sink, and high thermal resistance.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The low-thermal-resistance tearing and electric breakdown-resistant composite heat-conducting phase-change material is characterized by comprising the following components in parts by weight: 5-10 parts of base resin, 0.5-1.5 parts of phase-change wax, 80-90 parts of filler, 1-3 parts of coupling agent and 0.1-0.5 part of antioxidant.
2. The low thermal resistance tear electrical breakdown resistant composite thermally conductive phase change material of claim 1, wherein the base resin is a polyolefin rubber having a molecular weight of 1000-5000.
3. The low thermal resistance tear electrical breakdown resistant composite thermally conductive phase change material of claim 1, wherein the phase change wax has a phase change temperature of 40 ℃ to 70 ℃.
4. The low thermal resistance tear electrical breakdown resistant composite thermally conductive phase change material of claim 1, wherein the filler is one or more of a ceramic, a metal, a carbon material.
5. The low thermal resistance tear electrical breakdown resistant composite thermally conductive phase change material of claim 1, wherein the coupling agent is one or more of a silane coupling agent, a titanate coupling agent, an aluminate coupling agent, and a zirconate coupling agent.
6. The low thermal resistance tear electrical breakdown resistant composite thermally conductive phase change material of claim 1, wherein the antioxidants comprise phenolic antioxidants, aminic antioxidants.
7. A method of preparing a low thermal resistance tear electrical breakdown resistant composite thermally conductive phase change material as claimed in any one of claims 1 to 6 comprising the steps of:
s1, stirring 5-10 parts of base resin, 0.5-1.5 parts of phase-change wax and 0.1-0.5 part of antioxidant in vacuum at 100-120 ℃ to be in a uniform state, adding 1-3 parts of coupling agent, stirring to be in a uniform state, and finally adding 80-90 parts of filler, stirring to be in a uniform state to obtain a phase-change material;
And S2, heating and coating the obtained phase-change material on two sides of the polyimide film to obtain the composite heat-conducting phase-change material.
8. The method for preparing a low thermal resistance tearing electrical breakdown resistant composite heat conductive phase change material according to claim 7, wherein in the step S2, the polyimide film is a double-sided corona-treated film with a thickness of 20-60 μm.
9. The method for preparing the low thermal resistance tearing electrical breakdown resistant composite heat conduction phase change material according to claim 7, wherein in the step S2, the thickness of the single-sided phase change coating is 10-60 μm.
10. The method for preparing the low thermal resistance tearing electrical breakdown resistant composite heat conduction phase change material according to claim 7, wherein in the step S2, the heating temperature is 100-120 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311854637.2A CN117903634A (en) | 2023-12-29 | 2023-12-29 | Low-thermal-resistance tearing and electric-breakdown-resistant composite heat-conducting phase-change material and preparation method thereof |
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|---|---|---|---|
| CN202311854637.2A CN117903634A (en) | 2023-12-29 | 2023-12-29 | Low-thermal-resistance tearing and electric-breakdown-resistant composite heat-conducting phase-change material and preparation method thereof |
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| CN117903634A true CN117903634A (en) | 2024-04-19 |
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