High-strength easy-to-operate heat-conducting phase change material

Abstract

The invention belongs to the field of advanced inorganic non-metallic materials, and discloses a high-strength and easy-to-operate heat-conducting phase change material. According to the heat-conducting phase-change material in some examples, through the combined action of the thermoplastic resin and the reactive resin, the advantages that the heat-conducting phase-change material becomes soft after being heated in the using process, the interface thermal resistance is reduced, and the heat dissipation effect is enhanced are guaranteed, meanwhile, the mechanical performance of the heat-conducting phase-change material can be guaranteed through the cross-linking reaction of the reactive resin, and operation is convenient. In the preparation process, a proper amount of diluent is added to enhance the fluidity of the thermoplastic resin at low temperature, and a polymerization catalyst of the reactive resin can be uniformly added into a product system at low temperature, so that the uniformity of the product is ensured.

Description

Technical Field

[0001] The present invention belongs to the field of advanced inorganic non-metallic materials in new materials, and in particular relates to a high-strength and easy-to-operate thermal conductive phase change material. Background Art

[0002] Thermal interface materials (TIMs) are primarily placed between heating elements and heat sink components, transferring heat and reducing contact thermal resistance. They are primarily composed of a base resin and thermally conductive fillers. The surface roughness of commonly used heating elements and heat sinks typically exceeds 8µm. If an electronic component directly contacts the heat sink, the effective contact area between them is only one-tenth of the heat sink base area, with the remainder blocked by air. This creates a high contact thermal resistance, severely impacting the component's heat dissipation performance. Although TIMs are used as auxiliary materials in electronic products, they can effectively address heat dissipation issues and improve their reliability, stability, and service life.

[0003] Thermally conductive gel, thermally conductive silicone grease, thermally conductive gaskets and thermally conductive phase change materials are more common thermal interface materials. Among them, thermally conductive phase change materials can change from a solid state at room temperature to a liquid or semi-solid state at operating temperature, wetting the device surface and reducing contact thermal resistance. At the same time, the change in the state of the thermally conductive phase change material can also significantly reduce the thickness of use and reduce the thermal resistance of the thermally conductive phase change material itself. It has a significant thermal conductivity effect and is widely used in high-power scenarios such as CPUs, GPUs, and servers.

[0004] CN109072051A discloses a method for preparing a thermally conductive phase-change material. The method primarily involves mixing a thermally conductive filler with a polymer, a phase-change material, an anti-aging agent, a coupling agent, and an ion scavenger to produce a thermally conductive phase-change material with low thermal resistance. However, in actual use, the high amount of thermally conductive filler added results in poor strength and operability of the resulting thermally conductive phase-change material. This technique uses EVA with a specific vinyl acetate content as the phase-change component, avoiding the problems of poor thermal stability and prone to flow and cracking. However, the preparation method essentially involves only physical mixing, and the material's inherent strength is insufficient when highly filled.

[0005] The low thermal resistance phase change thermal conductive material disclosed in CN111303642A includes a thermal conductive material, a phase change fluid, a flame retardant, a coupling agent, and a toughening agent. The preparation method includes: 1) baking graphite powder, aluminum nitride powder, zinc oxide powder, aluminum oxide powder, silicon dioxide powder, silicon carbide powder, and glass fiber, and then placing them in a ball mill to uniformly disperse the powder materials to obtain a mixture; the baking and ball milling not only increase the surface activity of each powder particle, but also facilitate the bonding between the powder and the phase change fluid, thereby improving thermal conductivity and reducing thermal resistance; 2) adding paraffin wax, ethylene-vinyl acetate copolymer, vinyl silicone oil, polybutylene terephthalate, and polyethylene to a high-speed mixer, heating them until completely melted, stirring them at high speed, adding the flame retardant, coupling agent, and toughening agent, and continuing to stir; 3) adding the mixture obtained in step 1) to the high-speed mixer in step 2), stirring until the system is uniformly dispersed, pouring it into a mold, and cooling it to room temperature to obtain the low thermal resistance phase change thermal conductive material. Its phase change thermal conductive material is also a simple mixture of various raw materials.

[0006] It is difficult to balance the fluidity and mechanical properties of thermal conductive phase change materials. In order to ensure the phase change thermal conductivity effect, strength must generally be sacrificed. Summary of the Invention

[0007] The object of the present invention is to overcome at least one disadvantage of the prior art and to provide a high-strength, easy-to-operate thermally conductive phase change material.

[0008] The technical solution adopted by the present invention is: A high-strength and easy-to-operate thermal conductive phase change material, the preparation method of which comprises the following steps: S1) weighing raw materials, wherein the raw materials are composed by weight of: thermoplastic resin: 10-90 parts, reactive resin: 10-30 parts, thermal conductive filler: 300-3000 parts, phase change material: 5-20 parts, plasticizer: 5-30 parts, coupling agent: 1-50 parts, and antioxidant: appropriate amount; S2) heating and stirring the raw materials and then cooling them to obtain a mixture; S3) adding a diluent to the mixture, mixing uniformly, and then adding a polymerization catalyst, mixing uniformly to obtain a pre-reacted product; S4) rolling the pre-reacted product into a sheet and initiating curing to obtain a high-strength and easy-to-handle thermally conductive phase change material.

[0009] In some examples, the thermoplastic resin is selected from at least one of polyethylene, polypropylene, polyvinyl chloride, polystyrene, ethylene propylene terpolymer, and styrene-butadiene-styrene.

[0010] In some examples, the reactive resin is selected from at least one of vinyl silicone oil, hydrogen silicone oil, vinylphenyl silicone oil, hydroxy silicone oil, isocyanate, and polyol.

[0011] In some examples, the polymerization catalyst is selected from at least one of a platinum catalyst, dibutyltin dilaurate, stannous octoate, dibutyltin diacetate, and a photoinitiator.

[0012] In some examples, the thermally conductive filler is selected from at least one of Al2O3, ZnO, SiO2, BN, AlN, Al(OH)3, SiC, MgO, graphene, diamond, copper, and silver.

[0013] In some examples, the phase change material is selected from at least one of paraffin wax, n-hexadecane, n-octadecane, and sasol wax.

[0014] In some examples, the plasticizer is selected from at least one of naphthenic oil, PAO, and paraffin oil.

[0015] In some examples, the coupling agent is selected from at least one of a silane coupling agent, a titanate coupling agent, and an aluminate coupling agent.

[0016] In some examples, the antioxidant is selected from at least one of hindered phenols, hindered amines, and phosphites.

[0017] In some examples, the diluent is a methyl silicone oil solution with a solute added thereto, and the solute is selected from at least one of white oil, isododecane, ether, pentane, acetone, and methanol.

[0018] In some examples, the mass content of the solute in the diluent is 10-30%.

[0019] In some examples, the mass ratio of the diluent to the mixture is (0.5-3):100.

[0020] In some embodiments, the raw material is heated to a temperature of 80-180°C.

[0021] In some embodiments, the raw material is heated for 0.5 to 3 hours.

[0022] In some examples, the vinyl silicone oil is selected from at least one of terminal vinyl silicone oil, side vinyl silicone oil, and terminal-side vinyl silicone oil.

[0023] In some examples, the hydrogen-containing silicone oil is selected from at least one of end hydrogen-containing silicone oil, side hydrogen-containing silicone oil, and end-side hydrogen-containing silicone oil.

[0024] In some examples, the vinylphenyl silicone oil has a phenyl content of 5 to 10 mol%.

[0025] In some examples, the hydroxy silicone oil is selected from at least one of terminal hydroxy silicone oil and hydroxy vinyl silicone oil.

[0026] In some examples, the isocyanate is selected from at least one of aliphatic polyisocyanate and aromatic polyisocyanate.

[0027] In some examples, the polyol is selected from at least one of polyether diol and polyether triol.

[0028] In some examples, the photoinitiator is selected from at least one of 1-hydroxy-cyclohexyl benzophenone, isopropylthioxanthone, 2-hydroxy-2-methyl-1-phenyl-1-propyl ketone, and 2,4,6-trimethylbenzoyldiphenylphosphine oxide.

[0029] In some examples, the vinyl silicone oil has a viscosity of 20 to 1000 cps.

[0030] In some examples, the hydrogenated silicone oil has a viscosity of 10 to 500 cps.

[0031] In some examples, the hydroxy silicone oil has a viscosity of 20 to 1000 cps.

[0032] In some examples, the number average molecular weight of the polyether diol is 1000-3000, the number average molecular weight of the polyether triol is 2000-5000, and the functionality is 2-3.

[0033] In some examples, the viscosity of the vinylphenyl silicone oil is 20 to 500 cps.

[0034] In some examples, the sheet has a thickness of 0.1 to 5 mm.

[0035] The above features can be combined arbitrarily unless they conflict with each other.

[0036] The beneficial effects of the present invention are: The thermally conductive phase change materials of some embodiments of the present invention, through the combined action of thermoplastic resin and reactive resin, not only ensure that the thermally conductive phase change material softens when heated during use, reducing interfacial thermal resistance and enhancing heat dissipation, but also that the cross-linking reaction of the reactive resin ensures the mechanical properties of the thermally conductive phase change material for easy operation.

[0037] In some embodiments of the thermally conductive phase change material of the present invention, an appropriate amount of diluent is added during the preparation process to enhance the fluidity of the thermoplastic resin at low temperatures, so that the polymerization catalyst of the reactive resin can be evenly added to the product system at low temperatures, ensuring the uniformity of the product.

[0038] In some embodiments of the thermally conductive phase change material of the present invention, the main solution using a methyl silicone oil system as a diluent can also reduce the release force between the thermally conductive phase change material and the release film, thereby improving the operability of the thermally conductive phase change material to a certain extent.

[0039] In some examples of the thermally conductive phase change material of the present invention, a phase change material with a thermoplastic material as the matrix is ​​first prepared, which can reduce the problems of high matrix viscosity, less addition of thermally conductive filler, and low thermal conductivity caused by the reaction of the reactive resin. Then, through the second step reaction, the mechanical strength of the thermoplastic matrix material is enhanced, thereby achieving the preparation of a high-strength and easy-to-operate thermally conductive phase change material while maintaining the thermal conductivity. DETAILED DESCRIPTION

[0040] A high-strength and easy-to-operate thermal conductive phase change material, the preparation method of which comprises the following steps: S1) weighing raw materials, wherein the raw materials are composed by weight of: thermoplastic resin: 10-90 parts, reactive resin: 10-30 parts, thermal conductive filler: 300-3000 parts, phase change material: 5-20 parts, plasticizer: 5-30 parts, coupling agent: 1-50 parts, and antioxidant: appropriate amount; S2) heating and stirring the raw materials and then cooling them to obtain a mixture; S3) adding a diluent to the mixture, mixing uniformly, and then adding a polymerization catalyst, mixing uniformly to obtain a pre-reacted product; S4) rolling the pre-reacted product into a sheet and initiating curing to obtain a high-strength and easy-to-handle thermally conductive phase change material.

[0041] The mixing ratio of thermoplastic resin and reactive resin can be adjusted accordingly according to the specific application field of the thermal conductive phase change material. Generally speaking, if the proportion of thermoplastic resin is high, the phase change material will be relatively softer and more prone to deformation; conversely, if the proportion of reactive resin is high, it will react and cross-link to form a network molecule, giving the thermal conductive phase change material better mechanical properties.

[0042] In some examples, the thermoplastic resin is selected from at least one of polyethylene, polypropylene, polyvinyl chloride, polystyrene, ethylene propylene terpolymer, and styrene-butadiene-styrene.

[0043] The reactive resin can react and crosslink, such as undergoing polymerization to form a network or chain molecule. In some examples, the reactive resin is selected from at least one of vinyl silicone oil, hydrogen silicone oil, vinylphenyl silicone oil, hydroxy silicone oil, isocyanate, and polyol.

[0044] The polymerization catalyst can be selected according to the selected reactive resin and thermoplastic resin. In some examples, the polymerization catalyst is selected from at least one of a platinum catalyst, dibutyltin dilaurate, stannous octoate, dibutyltin diacetate, and a photoinitiator.

[0045] There are no special requirements for the thermally conductive filler, and the selection can be made based on factors such as the application scenario of the thermally conductive phase change material and cost. In some embodiments, the thermally conductive filler is selected from at least one of Al2O3, ZnO, SiO2, BN, AlN, Al(OH)3, SiC, MgO, graphene, diamond, copper, and silver.

[0046] There are no special requirements for the phase change material, as long as it is well compatible with the thermoplastic resin and the reactive resin. In some embodiments, the phase change material is selected from at least one of paraffin wax, n-hexadecane, n-octadecane, and sasol wax.

[0047] The plasticizer can improve the processing performance, flexibility, and mechanical properties of the thermally conductive phase change material, as long as it is compatible with other raw materials. In some embodiments, the plasticizer is selected from at least one of naphthenic oil, PAO, and paraffin oil.

[0048] The coupling agent can improve the compatibility of the thermally conductive filler with the organic resin and increase the filling amount of the filler. In some examples, the coupling agent is selected from at least one of a silane coupling agent, a titanate coupling agent, and an aluminate coupling agent.

[0049] Antioxidants can improve the stability and service life of the product. In some examples, the antioxidant is selected from at least one of hindered phenols, hindered amines, and phosphites.

[0050] By diluting the obtained product with a diluent, the fluidity of the thermoplastic resin at low temperatures is enhanced. The reactants of the reactive resin can be evenly added to the product system at low temperatures, ensuring product uniformity. In some embodiments, the diluent is a methyl silicone oil solution with a solute selected from at least one of white oil, isododecane, ether, pentane, acetone, and methanol. Using a methyl silicone oil system as the main diluent can also reduce the release force between the thermally conductive phase change material and the release film, thereby improving the operability of the thermally conductive phase change material to a certain extent.

[0051] In some examples, the mass content of the solute in the diluent is 10-30%.

[0052] In some examples, the mass ratio of the diluent to the mixture is (0.5-3):100.

[0053] In some examples, the raw materials are heated to a temperature of 80-180° C. Such a temperature can allow the raw materials to be better mixed and uniform.

[0054] The heating time can be adjusted as needed to ensure that the raw materials are fully mixed. In some embodiments, the raw materials are heated for 0.5 to 3 hours.

[0055] In some examples, the vinyl silicone oil is selected from at least one of terminal vinyl silicone oil, side vinyl silicone oil, and terminal-side vinyl silicone oil.

[0056] In some embodiments, the vinyl silicone oil has a viscosity of 20 to 1000 cps. Vinyl silicone oil with such a viscosity has better processability.

[0057] In some examples, the hydrogen-containing silicone oil is selected from at least one of end hydrogen-containing silicone oil, side hydrogen-containing silicone oil, and end-side hydrogen-containing silicone oil.

[0058] In some embodiments, the hydrogenated silicone oil has a viscosity of 10 to 500 cps. Hydrogenated silicone oils with such a viscosity have better processability.

[0059] In some examples, the vinylphenyl silicone oil has a phenyl content of 5 to 10 mol%.

[0060] In some embodiments, the viscosity of the vinyl phenyl silicone oil is 20 to 500 cps. Vinyl phenyl silicone oil with such a viscosity has better processability.

[0061] In some examples, the hydroxy silicone oil is selected from at least one of terminal hydroxy silicone oil and hydroxy vinyl silicone oil.

[0062] In some embodiments, the hydroxy silicone oil has a viscosity of 20 to 1000 cps. Hydroxy silicone oils with such a viscosity have better processability.

[0063] In some examples, the isocyanate is selected from at least one of aliphatic polyisocyanate and aromatic polyisocyanate.

[0064] In some examples, the polyol is selected from at least one of polyether diol and polyether triol.

[0065] Isocyanates can react with polyols to form polyurethanes.

[0066] In some examples, the number average molecular weight of the polyether diol is 1000 to 3000, the number average molecular weight of the polyether triol is 2000 to 5000, and the functionality is 2 to 3. Raw materials with such molecular weight and functionality are conducive to the preparation of thermal conductive phase change materials with better performance.

[0067] In some examples, the photoinitiator is selected from at least one of 1-hydroxy-cyclohexyl benzophenone, isopropylthioxanthone, 2-hydroxy-2-methyl-1-phenyl-1-propyl ketone, and 2,4,6-trimethylbenzoyldiphenylphosphine oxide.

[0068] The thickness of the sheet can be adjusted according to the application scenario. In some embodiments, the thickness of the sheet is 0.1 to 5 mm. This thickness is sufficient for most application scenarios.

[0069] The above features can be combined arbitrarily unless they conflict with each other.

[0070] The technical solution of the present invention is further illustrated below with reference to examples.

[0071] In the following examples, the hydrogenated silicone oil used has a viscosity of 10-500 cps; the vinylphenyl silicone oil has a phenyl content of 5-10 mol% and a density of 20-500 cps; the hydroxy silicone oil has a viscosity of 20-1000 cps; the polyether diol has a number-average molecular weight of 1000-3000, and the polyether triol has a number-average molecular weight of 2000-5000, with a functionality of 2-3. For ease of comparison, the antioxidant is uniformly rated at 1010.

[0072] Example 1: S1) Weighing raw materials, wherein the raw materials are composed by weight of: thermoplastic resin (ethylene propylene terpolymer): 85 parts, reactive resin (vinyl silicone oil): 15 parts, reactive resin (hydrogen-containing silicone oil): 5 parts, thermal conductive filler (aluminum powder): 2800 parts, phase change material (Sasol wax): 18 parts, plasticizer (PAO): 13 parts, coupling agent (γ-aminopropyltriethoxysilane): 20 parts, and antioxidant: 3 parts; S2) heating the raw materials to 140° C. and stirring for 90 minutes to uniformly mix the raw materials and cooling to obtain a mixture; S3) adding a diluent (methyl silicone oil containing isododecane, wherein the mass content of isododecane is 15%) to the mixture at a mass ratio of 2:100, mixing thoroughly, and then adding a polymerization catalyst (Perkin catalyst), mixing thoroughly to obtain a pre-reacted product; S4) rolling the pre-reacted product into a sheet with a thickness of 0.1-0.5 mm, and initiating curing (100° C. for 10 minutes) to obtain a thermally conductive phase change material.

[0073] Example 2: S1) Weighing raw materials, wherein the raw materials are composed by weight of: thermoplastic resin (polyethylene): 25 parts, thermoplastic resin (polyvinyl chloride): 60 parts, reactive resin (aliphatic polyisocyanate): 5 parts, reactive resin (polyether triol): 25 parts, thermal conductive filler (aluminum oxide): 1300 parts, thermal conductive filler (zinc oxide): 500 parts, phase change material (paraffin): 8 parts, plasticizer (paraffin oil): 28 parts, coupling agent (isopropyl tris(dioctyl pyrophosphate) titanate): 30 parts, and antioxidant: 5 parts; S2) heating the raw materials to 160° C. and stirring for 60 minutes to uniformly mix the raw materials and cooling to obtain a mixture; S3) adding a diluent (methyl silicone oil containing methanol, wherein the weight content of methanol is 20%) to the mixture at a mass mixing ratio of 1:100, and adding a polymerization catalyst (dibutyltin dilaurate) after mixing evenly to obtain a pre-reacted product; S4) rolling the pre-reacted product into a sheet with a thickness of 0.1-0.5 mm, and initiating curing (80° C. for 10 minutes) to obtain a thermally conductive phase change material.

[0074] Example 3: S1) Weighing raw materials, wherein the raw materials have the following composition by weight: thermoplastic resin (polypropylene): 5 parts, thermoplastic resin (polystyrene): 20 parts, reactive resin (aliphatic polyisocyanate): 5 parts, reactive resin (polyether triol): 25 parts, thermal conductive filler (aluminum nitride): 1100 parts, thermal conductive filler (boron nitride): 400 parts, phase change material (paraffin): 15 parts, plasticizer (naphthenic oil): 20 parts, coupling agent (aluminate coupling agent): 10 parts, and antioxidant: 5 parts; S2) heating the raw materials to 130° C. and stirring for 60 minutes to uniformly mix the raw materials and cooling to obtain a mixture; S3) adding a diluent (methyl silicone oil containing isododecane, wherein the weight content of methanol is 20%) to the mixture at a mass mixing ratio of 1:100, mixing thoroughly, and then adding a polymerization catalyst (1-hydroxy-cyclohexyl benzophenone), mixing thoroughly, to obtain a pre-reacted product; S4) rolling the pre-reacted product into a sheet with a thickness of 0.1-0.5 mm, and initiating curing (100° C. for 20 minutes) to obtain a thermally conductive phase change material.

[0075] Comparative Example 1: S1) Weighing raw materials, wherein the raw materials are composed by weight of: thermoplastic resin (ethylene propylene terpolymer): 85 parts, reactive resin (vinyl silicone oil): 15 parts, reactive resin (hydrogen-containing silicone oil): 5 parts, thermal conductive filler (aluminum powder): 2800 parts, phase change material (Sasol wax): 18 parts, plasticizer (PAO): 13 parts, coupling agent (γ-aminopropyltriethoxysilane): 20 parts, and antioxidant: 3 parts; S2) heating the raw materials to 140° C. and stirring for 90 minutes to uniformly mix the raw materials and cooling to obtain a mixture; S3) rolling the pre-reacted product into a sheet with a thickness of 0.1-0.5 mm, and initiating curing (100° C. for 10 minutes) to obtain a thermally conductive phase change material.

[0076] The thermal conductive phase change material obtained at this time has poor strength and poor operability. Especially when the thickness is less than 0.2 mm, the thermal conductive phase change material is difficult to peel off from the release film.

[0077] Comparative Example 2: S1) Weighing raw materials, wherein the raw materials are composed by weight of: thermoplastic resin (ethylene propylene terpolymer): 85 parts, reactive resin (vinyl silicone oil): 15 parts, reactive resin (hydrogen-containing silicone oil): 5 parts, thermal conductive filler (aluminum powder): 2800 parts, phase change material (Sasol wax): 18 parts, plasticizer (PAO): 13 parts, coupling agent (γ-aminopropyltriethoxysilane): 20 parts, and antioxidant: 3 parts; S2) heating the raw materials to 140° C. and stirring for 90 minutes to uniformly mix the raw materials and cooling to obtain a mixture; S3) rolling the pre-reacted product into a sheet with a thickness of 0.1-0.5 mm to obtain a thermally conductive phase change material.

[0078] The thermal conductive phase change material obtained at this time has a high viscosity and is difficult to compress into sheets.

[0079] Thermal conductive phase change material performance testing Thermal conductivity is tested according to ASTM D5470, and tensile strength and peel strength are tested according to ASTM D638.

[0080] The performance tests of different examples of thermal conductive phase change materials are shown in Table 1.

[0081] Table 1 Thermal conductivity tensile strength Peel force Example 1 8 W / mk 0.03 MPa 60 g / 25 mm Example 2 6 W / mk 0.06 MPa 80 g / 25 mm Example 3 10 W / mk 0.04 MPa 70 g / 25 mm Comparative Example 1 8 W / mk 0.005M Pa 8 g / 25 mm Comparative Example 2 / / 3 g / 25 mm It can be seen from the data in Table 1 that the difference between Comparative Example 1 and Example 1 is that no polymerization catalyst is added and the reactive resin does not react, resulting in a larger filling amount of the final product, a significant decrease in the mechanical properties of the product, poor strength of the material itself, and a significant decrease in the mechanical properties of the thermal conductive phase change material finally prepared, and poor operability.

[0082] The above is a further detailed description of the present invention and should not be considered as a limitation on the specific implementation of the present invention. For those skilled in the art, simple deductions or substitutions that do not depart from the concept of the present invention are within the scope of protection of the present invention.

Claims

1. A high-strength and easy-to-operate thermal conductive phase change material, characterized in that: The preparation method comprises the following steps: S1) weighing raw materials, wherein the raw materials are composed by weight of: thermoplastic resin: 10-90 parts, reactive resin: 10-30 parts, thermal conductive filler: 300-3000 parts, phase change material: 5-20 parts, plasticizer: 5-30 parts, coupling agent: 1-50 parts, and antioxidant: appropriate amount; S2) heating and stirring the raw materials and then cooling them to obtain a mixture; S3) adding a diluent to the mixture, mixing uniformly, and then adding a polymerization catalyst, mixing uniformly to obtain a pre-reacted product; S4) rolling the pre-reacted product into a sheet and initiating curing to obtain a high-strength and easy-to-handle thermally conductive phase change material.

2. The high-strength and easy-to-operate thermally conductive phase change material according to claim 1, characterized in that: The thermoplastic resin is selected from at least one of polyethylene, polypropylene, polyvinyl chloride, polystyrene, ethylene propylene terpolymer, and styrene-butadiene-styrene; The reactive resin is selected from at least one of vinyl silicone oil, hydrogen silicone oil, vinyl phenyl silicone oil, hydroxy silicone oil, isocyanate, and polyol; The polymerization catalyst is selected from at least one of a platinum catalyst, dibutyltin dilaurate, stannous octoate, dibutyltin diacetate, and a photoinitiator.

3. The high-strength and easy-to-operate thermally conductive phase change material according to claim 1, characterized in that: The thermally conductive filler is selected from at least one of Al2O3, ZnO, SiO2, BN, AlN, Al(OH)3, SiC, MgO, graphene, diamond, copper, silver, and aluminum; The phase change material is selected from at least one of paraffin wax, n-hexadecane, n-octadecane, and sasol wax; The plasticizer is selected from at least one of naphthenic oil, PAO, and paraffin oil; The coupling agent is selected from at least one of a silane coupling agent, a titanate coupling agent, and an aluminate coupling agent; The antioxidant is selected from at least one of hindered phenols, hindered amines, and phosphites; The diluent is a methyl silicone oil solution added with a solute, and the solute is selected from at least one of white oil, isododecane, ether, pentane, acetone, and methanol.

4. The high-strength and easy-to-operate thermally conductive phase change material according to claim 3, characterized in that: The mass content of the solute in the diluent is 10 to 30%.

5. The high-strength and easy-to-operate thermally conductive phase change material according to any one of claims 1, 3 or 4, characterized in that: The mass ratio of the diluent to the mixture is (0.5-3):

100.

6. The high-strength and easy-to-operate thermally conductive phase change material according to claim 1, characterized in that: The raw material is heated to a temperature of 80 to 180°C.

7. The high-strength and easy-to-operate thermally conductive phase change material according to claim 6, characterized in that: The raw material heating time is 0.5 to 3 hours.

8. The high-strength and easy-to-operate thermally conductive phase change material according to claim 2, characterized in that: The vinyl silicone oil is selected from at least one of terminal vinyl silicone oil, side vinyl silicone oil, and terminal side vinyl silicone oil; The hydrogen-containing silicone oil is selected from at least one of end hydrogen-containing silicone oil, side hydrogen-containing silicone oil, and end-side hydrogen-containing silicone oil; The vinylphenyl silicone oil has a phenyl content of 5 to 10 mol%; The hydroxy silicone oil is selected from at least one of terminal hydroxy silicone oil and hydroxy vinyl silicone oil; The isocyanate is selected from at least one of aliphatic polyisocyanates and aromatic polyisocyanates; The polyol is selected from at least one of polyether diol and polyether triol; The photoinitiator is selected from at least one of 1-hydroxy-cyclohexyl benzophenone, isopropylthioxanthone, 2-hydroxy-2-methyl-1-phenyl-1-propyl ketone and 2,4,6-trimethylbenzoyldiphenylphosphine oxide.

9. The high-strength and easy-to-operate thermally conductive phase change material according to claim 7, characterized in that: The viscosity of the vinyl silicone oil is 20 to 1000 cps; The hydrogenated silicone oil has a viscosity of 10 to 500 cps; The viscosity of the hydroxy silicone oil is 20 to 1000 cps; The number average molecular weight of the polyether diol is 1000-3000, the number average molecular weight of the polyether triol is 2000-5000, and the functionality is 2-3; The viscosity of the vinylphenyl silicone oil is 20 to 500 cps.

10. The high-strength and easy-to-operate thermally conductive phase change material according to claim 1, characterized in that: The thickness of the sheet is 0.1 to 5 mm.