CN114276686A - High-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket and preparation method thereof - Google Patents
High-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket and preparation method thereof Download PDFInfo
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Abstract
The invention relates toThe technical field of silicone rubber, in particular to a silicone rubber gasket with high mechanical strength, high heat conduction and heat dissipation and a preparation method thereof, wherein the preparation method comprises the following steps: 49 parts by weight of vinyl silicone oil and modified composite heat-conducting filler
Platinum catalyst
Mixing to obtain a component A; 51 parts of vinyl silicone oil and modified composite heat-conducting filler by weight
Hydrogen-containing silicone oil
Inhibitors
Mixing to obtain a component B; and mixing the components A and B, and performing compression molding to obtain the high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket. According to the invention, the alumina heat-conducting filler modified by the hydrophobic white carbon black is added, so that the product has high mechanical strength, high heat conductivity coefficient, small addition amount and good machining performance.
Description
Technical Field
The invention relates to the technical field of silicone rubber, in particular to a silicone rubber gasket with high mechanical strength, high heat conduction and heat dissipation and a preparation method thereof.
Background
At present, an electric automobile is the key direction of new energy automobile development, and the core component of the electric automobile is a power battery pack which is responsible for providing power of the whole automobile and energy supply of vehicle-mounted equipment. The power adopted by mainstream electric automobiles in the market at present is a power battery pack consisting of 18650 standard lithium batteries, and the 18650 lithium batteries have the advantages of high energy density, good stability, low cost and high reliability. However, 18650 lithium batteries also have a great disadvantage that heat is generated during operation, and if the operating temperature of the batteries is too high, the discharging speed of the batteries is too high, which affects the cruising ability of the electric vehicle, so that the thermal design of the power battery pack of the electric vehicle is a key technology for ensuring the reliable operation of the batteries.
The liquid cooling heat dissipation part of the power lithium battery pack is composed of a liquid cooling pipe and a heat dissipation silicon rubber village mat. The liquid cooling pipe comprises internal cooling liquid, the heat dissipation of the heat generated by the work of the lithium battery is mainly completed, the heat conduction between the electric core and the liquid cooling pipe is mainly completed through the heat dissipation silicon rubber gasket, and meanwhile, the effects of shock absorption and gap filling are also achieved. The heat dissipation problem of new energy automobile has always been one of the focus problems that people paid attention to, and traditional heat dissipation technology can't satisfy the heat dissipation problem of present lithium cell, nevertheless the heat dissipation silicon rubber liner can be fine the heat dissipation problem of solving present lithium cell. However, although the existing heat-dissipating silicone rubber has a good heat-dissipating effect, the machining performance is poor, and the requirements of gap filling and shock absorption cannot be met; therefore, it is an urgent problem to obtain a high thermal conductivity while ensuring a high mechanical strength.
Disclosure of Invention
In order to solve the technical problem, the invention provides a preparation method of a high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket, which comprises the following steps:
a preparation method of a high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket is characterized by comprising the following steps:
49 parts by weight of vinyl silicone oil and 20 parts by weight of modified composite heat-conducting filler
50 portions of platinum catalyst 0.1
0.3 part of the components are mixed to obtain a component A;
51 parts of vinyl silicone oil and 20 parts of modified composite heat-conducting filler by weight
50 parts of hydrogen-containing silicone oil2
4 portions of inhibitor 0.01
0.1 part of the components are mixed to obtain a component B;
and mixing the components A and B, and performing compression molding to obtain the high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket.
Further, the composite heat conducting filler is one or more of hydrophobic white carbon black modified alumina, aluminum nitride, boron nitride, magnesium oxide, zinc oxide or silicon carbide, wherein alumina is preferred.
Further, the specific surface area of the hydrophobic white carbon black is 100g/m2
260g/m2。
Further, the specific surface area of the alumina is 100g/m2
250g/m2。
Further, the preparation method of the hydrophobic white carbon black modified alumina comprises the step of mixing the hydrophobic white carbon black and the alumina according to the mass ratio of 0.5-2.
Further, the mol content of vinyl in the vinyl silicone oil is 0.3
2% and a viscosity of 200cps at 25 deg.C
l00000cps。
Further, the hydrogen-containing silicone oil accounts for 0.1 percent of the mass fraction of hydrogen
1.0 percent of methyl hydrogen silicone oil.
Further, the inhibitor is one of 2-methyl-3-butanol-2 alcohol or ethyl cyclohexanol.
Further, the catalyst is selected from chloroplatinic acid or a Karster catalyst, wherein the content of the platinum is 200-5000 ppm.
On the other hand, the high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket prepared by the preparation method is provided, the tensile strength of the silicone rubber gasket is 3-6MPa, the elongation at break is 200% -370%, the tear strength is 8-20KN/m, and the heat conductivity coefficient is 0.6-3.0 w/m.k.
The high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket and the preparation method thereof have the following advantages:
1. according to the invention, the alumina heat-conducting filler modified by the hydrophobic white carbon black is added, so that the product has high mechanical strength, high heat conductivity coefficient, small addition amount and good machining performance;
2. the preparation method has the advantages of simple formula process, easy repetition, stable production and easy industrialization.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a flow chart of the preparation of one embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few 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 described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Fig. 1 shows a preparation method of a high-mechanical-strength high-thermal-conductivity heat-dissipation silicone rubber gasket of the present application, which includes: 49 parts by weight of vinyl silicone oil and 20 parts by weight of modified composite heat-conducting filler
50 portions of platinum catalyst 0.1
0.3 part of the mixture is mixed to obtain a component A; 51 parts of vinyl silicone oil and 20 parts of modified composite heat-conducting filler by weight
50 parts of hydrogen-containing silicone oil 2
4 parts of inhibitor and 0.01-0.1 part of inhibitor are mixed to obtain a component B; and mixing the component A and the component B, and performing compression molding to obtain the high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket.
Wherein, the mixing in the preparation process of the component A and the component B adopts a three-roller machine, and of course, other mixing devices can be adopted, and the specific mixing device and parameters are not limited herein as long as the uniform mixing can be ensured.
The component A and the component B are mixed by a three-roller machine according to the mass ratio of 1:1, 1:2 or 2:1, preferably 1:1, and the best vulcanization effect is achieved; the specific molding parameters were 120 ℃ for 5min, although other parameters may be used as long as the molding can be performed.
The application adopts the modified composite heat-conducting filler, the using amount is less, simultaneously, the silicone rubber gasket is ensured to have higher mechanical strength, and higher heat conductivity coefficient is also realized, so that the use of the power battery pack can be met. In addition, reaction raw materials are respectively prepared into the component A and the component B, so that the storage time is longer, and the storage and the preparation are convenient compared with the mixing of all the raw materials.
For the preparation of the silicone rubber gasket, it can be prepared by compression molding the above silicone rubber. In another embodiment of the present application, the composite heat conductive filler is one or more of hydrophobic silica modified alumina, aluminum nitride, boron nitride, magnesium oxide, zinc oxide, or silicon carbide, and preferably alumina.
The aluminum oxide, aluminum nitride, boron nitride, magnesium oxide, zinc oxide or silicon carbide heat-conducting filler treated by the hydrophobic white carbon black not only has hydrophobic property, but also has heat-conducting property, so that the composite heat-conducting filler can have better compatibility and reinforcement effect on a silicon rubber system, and the silicon rubber has better mechanical strength; meanwhile, a better heat conduction channel can be formed under the condition of lower addition amount, so that higher heat conductivity coefficient can be realized.
In another embodiment of the present application, the hydrophobic silica has a specific surface area of 100g/m2 
260g/m2. When the specific surface area of the hydrophobic white carbon black is less than 100g/m2In time, the reinforcing effect is poor, and the application of the power battery pack cannot be met; when the specific surface area of the white carbon black is more than 260g/m2It is expensive and cost-prohibitive.
In another embodiment of the present application, the alumina specific surface area is 100g/m2 
250g/m2. The specific surface area of the alumina is the same as or similar to that of the hydrophobic white carbon black as much as possible, so that the composite modified filler not only meets higher mechanical strength, but also has higher heat conductivity coefficient, and the modification effect is best. .
The alumina is spherical, or can be powdery, shaped or unshaped; preferably spherical. The composite modified filler adopting spherical alumina has the best modification effect.
In another embodiment of the application, the preparation method of the hydrophobic white carbon black modified alumina is to mix the hydrophobic white carbon black and the alumina according to a mass ratio of 0.5-2. Specifically, the aluminum oxide and the hydrophobic white carbon black can be mixed by a ball mill mechanical mixing method, and under the action of friction collision and high energy generated in the ball mill mechanical mixing process, the surface of the aluminum oxide and the surface of the hydrophobic white carbon black can generate interface interaction, so that the interface of the aluminum oxide and the hydrophobic white carbon black generates alloying, the surface of the aluminum oxide is activated, and the composite heat-conducting filler has a hydrophobic characteristic, so that the composite heat-conducting filler can have good compatibility and a reinforcing effect on a silicon rubber system, and meanwhile, a good heat-conducting channel can be formed under the condition of low addition amount, and thus, a high heat-conducting coefficient can be realized; and the preparation process is simple and the operation is convenient. Generally, the mixture is mixed for 2 to 4 hours, the time is too short, the mixture is not uniform, and the subsequent use effect of the filler is influenced; the mixing time is too long, which not only wastes resources, but also affects the use effect of the filler.
In another embodiment of the present application, the vinyl silicone oil has a vinyl group content of 0.3 to 2 mol% and a viscosity of 200cps to l00000cps at 25 ℃.
Specifically, the vinyl silicone oil refers to a vinyl silicone oil having a vinyl group at both ends, a side chain, or both ends and a side chain of the linear polyorganosiloxane.
In another embodiment of the present application, the hydrogen-containing silicone oil is methyl hydrogen-containing silicone oil containing 0.1% to 1.0% of hydrogen by mass.
In another embodiment of the present application, the inhibitor is one of 2-methyl-3-butanol-2 alcohol or ethyl cyclohexanol.
In another embodiment of the present application, the catalyst is chloroplatinic acid or a Karster catalyst, wherein the platinum content is 200-5000 ppm. The chloroplatinic acid is a chloroplatinic acid isopropanol solution.
In another embodiment of the application, the high-mechanical-strength high-thermal-conductivity heat-dissipation silicone rubber gasket is provided, the tensile strength of the silicone rubber gasket is 3-6MPa, the elongation at break is 200% -370%, the tear strength is 8-20KN/m, and the thermal conductivity is 0.6-3.0 w/m.k.
In order to more clearly illustrate the protocol of the present application, reference is made to the following specific examples, wherein all parts in the examples are g.
Example 1
(1) Preparing a modified composite heat-conducting filler: 60 parts of the mixture is mixed with 100g/m of specific surface area2120 parts of hydrophobic white carbon black with the specific surface area of 250g/m2Mechanically mixing the spherical alumina in a spherical ball mill for 2 hours to obtain the composite heat-conducting filler of the hydrophobic white carbon black modified alumina;
(2) preparation of the component A: taking 20 parts of the composite heat-conducting filler prepared in the step (1), adding 49 parts of vinyl silicone oil with the vinyl content of 20000cps being 1%, adding 0.3 part of isopropanol solution of 5000ppm of chloroplatinic acid, and mixing on a three-roller machine to prepare a component A;
(3) preparation of the component B: taking 20 parts of the composite heat-conducting filler prepared in the step (1), adding 51 parts of vinyl silicone oil with the vinyl content of 1% of 20000cps, 4 parts of hydrogen-containing methyl silicone oil cross-linking agent with the hydrogen content of 0.5% and 0.1 part of 2-methyl-3-butylHuanhiol-2 alcohol, and mixing on a three-roller machine to prepare a component B;
(4) a preparation method of a high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket comprises the following steps: mixing the component A prepared in the step (2) with the component B prepared in the step (3) according to the weight ratio of 1:1, uniformly mixing to obtain the silicon rubber gasket composition, and then performing compression molding on the silicon rubber gasket composition at 120 ℃ for 5min to obtain the heat-dissipation silicon rubber gasket.
Example 2
60 parts of spherical alumina is selected in the preparation of the modified composite heat-conducting filler, and other steps and parameters are the same as those in the embodiment 1.
Example 3
120 parts of hydrophobic white carbon black and 60 parts of spherical alumina are selected in the preparation of the modified composite heat-conducting filler, and other steps and parameters are the same as those in the example 1.
Example 4
The surface area is selected to be 260g/m in the preparation of the modified composite heat-conducting filler2Hydrophobic white carbon black, 60 parts of spherical alumina, other steps and ginsengThe number is the same as in example 1.
Example 5
The specific surface area of the modified composite heat-conducting filler is 260g/m260 parts of hydrophobic white carbon black with the specific surface area of 100g/m2The spherical alumina of (1); the other steps and parameters were the same as in example 1.
Example 6
In the preparation of the component A, 30 parts of composite heat-conducting filler is selected; in the preparation of the component B, 30 parts of composite heat-conducting filler is selected; the other steps and parameters were the same as in example 4.
Example 7
In the preparation of the component A, 35 parts of composite heat-conducting filler is selected; in the preparation of the component B, 35 parts of composite heat-conducting filler is selected; the other steps and parameters were the same as in example 4.
Example 8
In the preparation of the component A, 40 parts of composite heat-conducting filler is selected; 40 parts of composite heat-conducting filler is selected in the preparation of the component B; the other steps and parameters were the same as in example 4.
Example 9
In the preparation of the component A, 50 parts of composite heat-conducting filler is selected; 50 parts of composite heat-conducting filler is selected in the preparation of the component B; the other steps and parameters were the same as in example 4.
Example 10
(1) Preparing a modified composite heat-conducting filler: 100 parts of specific surface area is 200g/m2Hydrophobic white carbon black, 100 parts of specific surface area is 250g/m2Mechanically mixing the spherical alumina in a spherical ball mill for 4 hours to obtain the composite heat-conducting filler of the hydrophobic white carbon black modified alumina;
(2) preparation of the component A: taking 20 parts of the composite heat-conducting filler prepared in the step (1), adding 49 parts of vinyl silicone oil with the vinyl content of 2% at 200cps, adding 0.1 part of 200pp isopropanol chloroplatinic acid solution, and mixing on a three-roller machine to prepare a component A;
(3) preparation of the component B: taking 20 parts of the composite heat-conducting filler prepared in the step (1), adding 51 parts of 200cps vinyl silicone oil with the vinyl content of 2%, 2 parts of hydrogen-containing methyl silicone oil cross-linking agent with the hydrogen content of 1% and 0.01 part of ethyl cyclohexyl cyclohexanol, and mixing on a three-roller machine to prepare a component B;
(4) a preparation method of a high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket comprises the following steps: mixing the component A prepared in the step (2) with the component B prepared in the step (3) according to the weight ratio of 1:1, uniformly mixing to obtain the silicon rubber gasket composition, and then performing compression molding on the silicon rubber gasket composition at 120 ℃ for 5min to obtain the heat-dissipation silicon rubber gasket.
Example 11
(1) Preparing a modified composite heat-conducting filler: 80 parts of specific surface area is 180g/m2Hydrophobic white carbon black, 100 parts of specific surface area is 200g/m2Mechanically mixing the spherical alumina in a spherical ball mill for 3 hours to obtain the composite heat-conducting filler of the hydrophobic white carbon black modified alumina;
(2) preparation of the component A: taking 20 parts of the composite heat-conducting filler prepared in the step (1), adding 49 parts of vinyl silicone oil with the vinyl content of 100000cps being 0.3%, adding 0.2 part of isopropanol solution of chloroplatinic acid with the concentration being 1000ppm, and mixing on a three-roller machine to prepare a component A;
(3) preparation of the component B: taking 20 parts of the composite heat-conducting filler prepared in the step (1), adding 51 parts of vinyl silicone oil with the vinyl content of 100000mPa & s of 0.3%, 3 parts of a hydrogen-containing methyl silicone oil cross-linking agent with the mass fraction of 0.1% and 0.05 part of ethyl cyclohexyl cyclohexanol, and mixing on a three-roller machine to prepare a component B;
(4) a preparation method of a high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket comprises the following steps: mixing the component A prepared in the step (2) with the component B prepared in the step (3) according to the weight ratio of 1:1, uniformly mixing to obtain the silicon rubber gasket composition, and then performing compression molding on the silicon rubber gasket composition at 120 ℃ for 5min to obtain the heat-dissipation silicon rubber gasket.
Example 12
The spherical alumina was replaced with aluminum nitride, and the other steps and parameters were the same as in example 1.
Example 13
The spherical alumina was replaced with boron nitride and magnesium oxide, wherein the boron nitride was 60 parts and the magnesium oxide was 60 parts, and the other steps and parameters were the same as in example 1.
Example 14
The spherical alumina was replaced with zinc oxide and silicon carbide, wherein 10 parts of zinc oxide and 110 parts of silicon carbide were used, and the other steps and parameters were the same as in example 1.
Example 15
The isopropyl alcohol solution of chloroplatinic acid was replaced with kast, and the other steps and parameters were the same as in example 1.
Comparative example 1
The embodiment is a high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket composition, and the preparation method comprises the following steps:
(1) preparation of the component A: taking 50 parts of untreated alumina heat-conducting filler, adding 49 parts of vinyl silicone oil with the vinyl content of 20000cps being 1%, adding 0.3 part of isopropanol solution of 5000ppm chloroplatinic acid, and mixing on a three-roller machine to prepare a component A;
(2) preparation of the component B: taking 50 parts of untreated alumina heat-conducting filler, adding 51 parts of vinyl silicone oil with the vinyl content of 1% of 20000cps, 4 parts of cross-linking agent with the content of 0.5% of hydrogen-containing silicone oil and 0.1 part of cross-linking inhibitor, and mixing on a three-roller machine to prepare a component B;
(3) preparation of the silicone rubber gasket: mixing the component A prepared in the step (2) with the component B prepared in the step (3) according to the weight ratio of 1:1, uniformly mixing to obtain the silicon rubber gasket composition, and then performing compression molding on the silicon rubber gasket composition at 120 ℃ for 5min to obtain the heat-dissipation silicon rubber gasket.
The silicone rubber gaskets prepared in all the examples and comparative examples were tested for their properties such as thermal conductivity, hardness, tensile strength, elongation at break, etc., and the test results are shown in table 1.
TABLE 1 Silicone rubber gasket Performance parameters for each of the examples and comparative examples
As can be seen from the above table, in examples 1 to 3, the change of the ratio of the hydrophobic white carbon black to the alumina in the hydrophobic white carbon black modified alumina composite heat conductive filler has a great influence on the heat conductivity and the mechanical strength. When the mass ratio of the hydrophobic white carbon black to the silicon rubber is 1:2, the specific surface area of the hydrophobic white carbon black is smaller than that of aluminum oxide, the composite heat-conducting filler formed by mixing the hydrophobic white carbon black and the aluminum oxide through a ball-milling machine is mainly formed by combining partial aluminum oxide on the surface of the white carbon black, the composite heat-conducting filler has good compatibility and reinforcement on a silicon oil main body, meanwhile, the aluminum oxide is combined, so that the heat conductivity of the silicon rubber can be improved, when the mass ratio of the composite heat-conducting filler to the silicon rubber is 1:1, the reinforcement effect of the composite heat-conducting filler to the silicon rubber is enhanced, and when the mass ratio of the composite heat-conducting filler to the silicon rubber is 2:1, the reinforcement effect of the composite heat-conducting filler to the silicon rubber is maximized. As can be seen from the data of examples 1-3 in the above table, when the mass ratio of the two is 1:1, the comprehensive performance is best, and the mechanical strength and the thermal conductivity are relatively high, and when the mass ratio of the two is 2:1, the mechanical strength is best, but the white carbon black is used in a large amount, and the surface of the alumina is covered by more hydrophobic white carbon black, so that the improvement of the thermal conductivity is influenced, and the thermal conductivity is reduced.
The results of comparative examples 2, 4 and 5 show that when the mass ratio of the hydrophobic white carbon black to the alumina is 1:1 and the specific surface areas are basically consistent, the obtained composite heat-conducting filler has the best reinforcing effect on the silicone rubber and the best improvement on the heat conductivity.
Comparing the structures of examples 4, 10 and 11, it can be seen that changing the type of the vinyl silicone oil and the type of the hydrogen-containing silicone oil has a certain influence on the mechanical strength, and when the vinyl silicone oil has a large vinyl content, the viscosity of the vinyl silicone oil is reduced, and the crosslinking density is too large, the hardness of the silicone rubber gasket is increased, the elongation is reduced, and the tear strength is also reduced; on the contrary, the viscosity of the vinyl silicone oil is increased, the vinyl content is reduced, the crosslinking density is reduced, the hardness of the silicone rubber is reduced, the elongation is increased, and the tear strength is also improved.
The results of comparative examples 4 and 6-9 show that the mechanical strength and thermal conductivity of the obtained silicone rubber are gradually improved by gradually increasing the amount of the composite heat-conducting filler, and the optimal properties are that the data of example 9, the hardness is 65A, the tensile strength is 6.0MPa, the tear strength is 20KN/m, the elongation at break is 370%, and the thermal conductivity is 3.0 (w/m.k), and the data results of comparative examples 8 and 9 show that the data results are close, so that the increase of the amount of the composite heat-conducting filler is continued, and the improvement of the mechanical strength and the thermal conductivity of the silicone rubber is not greatly influenced.
Comparative example 1 is not modified by hydrophobic white carbon black, alumina is directly added, and data results show that the thermal conductivity can also reach 3.0 (w/m.k), but the mechanical strength is poor, so the material is not suitable for occasions requiring high mechanical strength and is not suitable for preparing the heat-dissipating silicon rubber gasket for the new energy automobile.
Therefore, the high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket composition prepared in the embodiment of the invention has the advantages of excellent tensile strength, elongation at break, tearing strength and high heat conductivity after vulcanization, wherein the performance in the embodiment 9 is the best, and the composition is particularly suitable for preparing heat-dissipation silicone rubber gaskets for new energy automobiles.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A preparation method of a high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket is characterized by comprising the following steps:
49 parts by weight of vinyl silicone oil and modified composite heat-conducting filler
Part (c) of a platinum catalyst
Mixing to obtain a component A;
51 parts of vinyl silicone oil and modified composite heat-conducting filler by weight
Hydrogen-containing silicone oil
Portions, inhibitors
Mixing to obtain a component B;
and mixing the components A and B, and performing compression molding to obtain the high-mechanical-strength high-heat-conduction heat-dissipation silicone rubber gasket.
2. The preparation method according to claim 1, wherein the composite heat conductive filler is one or more of hydrophobic silica modified alumina, aluminum nitride, boron nitride, magnesium oxide, zinc oxide or silicon carbide, and alumina is preferred.
3. The preparation method according to claim 2, wherein the specific surface area of the hydrophobic silica is
4. The method according to claim 2, wherein the alumina has a specific surface area of
5. The preparation method of the alumina modified by the hydrophobic silica according to claim 2, wherein the preparation method comprises the step of mixing the hydrophobic silica and the alumina according to a mass ratio of 0.5-2.
6. The method according to claim 1, wherein the vinyl silicone oil has a vinyl group content of
A viscosity at 25 ℃ of
7. The method according to claim 1, wherein the hydrogen-containing silicone oil is a hydrogen-containing mass fraction
The methyl hydrogen-containing silicone oil.
8. The method of claim 1, wherein the inhibitor is one of 2-methyl-3-butanol-2 alcohol or ethyl cyclohexanol.
9. The method as claimed in claim 1, wherein the catalyst is selected from chloroplatinic acid or a Kansted catalyst, wherein the platinum is contained in an amount of 200-5000 ppm.
10. The high-mechanical-strength high-thermal-conductivity heat-dissipation silicone rubber gasket prepared by the preparation method of any one of claims 1 to 9 is characterized in that the tensile strength of the silicone rubber gasket is 3-6MPa, the elongation at break is 200-370%, the tear strength is 8-20KN/m, and the thermal conductivity is 0.6-3.0 w/m-k.
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| CN107118660A (en) * | 2017-06-06 | 2017-09-01 | 明光市泰丰新材料有限公司 | A kind of emergency light fluorescent tube explosion-proof coating of heat conductive flame-retarding and preparation method thereof |
| CN109735112A (en) * | 2018-12-28 | 2019-05-10 | 广州市白云化工实业有限公司 | Additional organosilicon thermally conductive gel and preparation method thereof |
| CN110172250A (en) * | 2019-05-22 | 2019-08-27 | 平湖阿莱德实业有限公司 | A kind of new-energy automobile extremely-low density high thermal conductivity calking boundary material and preparation method thereof |
| CN113308121A (en) * | 2021-07-14 | 2021-08-27 | 合肥工业大学 | Insulating high-thermal-conductivity gel filled with composite thermal-conductive filler based on chemical bond assembly |
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| CN116948408A (en) * | 2023-08-24 | 2023-10-27 | 广州市文逸通讯设备有限公司 | Wear-resistant heat-dissipation mobile phone protective shell material and preparation process thereof |
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