CN112500708A - Silicone rubber material and preparation method thereof - Google Patents
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Abstract
The invention discloses a silicon rubber material and a preparation method of the silicon rubber material. The silicone rubber material comprises a silicone rubber base rubber and a heat-conducting filler, wherein the heat-conducting filler is added into the silicone rubber base rubber, and the mass ratio of the heat-conducting filler to the silicone rubber base rubber is (1-30): 100, wherein the heat conducting filler comprises a carbon fiber material with a surface loaded with graphene oxide.
Description
Technical Field
The invention relates to the technical field of materials, in particular to a silicon rubber material and a preparation method of the silicon rubber material.
Background
Silicon rubber materials are widely applied to electronic products such as watches, mobile phones, Virtual Reality (VR) equipment, Augmented Reality (AR) equipment and diving products. The silicon rubber material has the characteristics of high and low temperature resistance, aging resistance, weather resistance, insulation, flame retardancy, water resistance and the like. However, as the functions of electronic products are more and the volume of the electronic products is smaller and smaller, the heat generation of the electronic products is more and more serious, and therefore, the continuous silica gel heat dissipation performance is a problem that needs to be solved urgently in the silicone rubber industry and the electronic circuit industry.
Disclosure of Invention
One object of the present invention is to provide a new technical solution for silicone rubber materials.
According to a first aspect of the present invention, there is provided a silicone rubber material. The silicone rubber material comprises a silicone rubber base rubber and a heat-conducting filler, wherein the heat-conducting filler is added into the silicone rubber base rubber, and the mass ratio of the heat-conducting filler to the silicone rubber base rubber is (1-30): 100, wherein the heat conducting filler comprises a carbon fiber material with a surface loaded with graphene oxide.
Optionally, the mass ratio of the heat conductive filler to the silicone rubber-based adhesive is (5-10): 100.
optionally, the silicone rubber-based rubber is methyl vinyl silicone rubber, wherein the molar content of the vinyl siloxane in the methyl vinyl silicone rubber is 0.01% to 0.5%.
Optionally, the silicone rubber further comprises a cross-linking agent added into the silicone rubber-based glue, wherein the cross-linking agent comprises polysiloxane, and the viscosity of the cross-linking agent is 0.1 Pa-s-100 Pa-s.
Optionally, the silicone rubber base rubber further comprises a catalyst, wherein the catalyst is added into the silicone rubber base rubber, and the catalyst is a vinyl siloxane complex containing platinum, wherein the mass content of platinum in the catalyst is 0.1% -0.5%.
Optionally, the silicone rubber base rubber further comprises an inhibitor, wherein the inhibitor is added into the silicone rubber base rubber, and the mass ratio of the inhibitor to the silicone rubber base rubber is (0.01-2): 100.
optionally, the preparation method of the heat conductive filler comprises the following steps: mixing the acidified carbon fibers with an aqueous solution of polyethyleneimine; adding an aqueous solution of graphene oxide into the liquid to form a mixed liquid; reacting the mixed solution under the microwave condition; adjusting the reacted substances to be neutral; the neutralized material was dried.
Optionally, the preparation method of the graphene oxide includes: providing graphite and a strong oxidant; and adding the graphite into the strong oxidant, and oxidizing the graphite by the strong oxidant to generate graphene oxide, wherein the strong oxidant comprises a mixed solution of concentrated sulfuric acid, sodium nitrate, hydrogen peroxide and potassium permanganate.
Optionally, in the thermally conductive filler, the content of graphene oxide is 0.5% to 2%.
According to another embodiment of the present disclosure, a method of preparing a silicone rubber material is provided. The preparation method comprises the following steps:
providing a silicon rubber base adhesive and a heat-conducting filler;
adding the heat-conducting filler into the silicon rubber-based adhesive, and uniformly mixing; wherein the mass ratio of the heat-conducting filler to the silicone rubber-based adhesive is (1-30): 100, the heat conducting filler comprises a carbon fiber material with a surface loaded with graphene oxide.
According to one embodiment of the present disclosure, a carbon fiber material having a surface loaded with graphene oxide is uniformly dispersed in a silicone rubber-based adhesive. The carbon fiber material forms a three-dimensional network structure in the silicon rubber-based adhesive. The graphene oxide is combined with the three-dimensional network structure, and the graphene oxide has excellent heat-conducting property, so that the three-dimensional network structure forms a heat-conducting path. The silicone rubber material added with the heat-conducting electric material has the characteristic of excellent heat-conducting property.
In addition, the carbon fiber material has the characteristic of high strength. The carbon fiber material can form effective combination with the silicon rubber-based adhesive, thereby obviously improving the impact strength of the silicon rubber-based adhesive.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flowchart of a method of preparing a thermally conductive filler according to one embodiment of the present disclosure.
Fig. 2 is a flow chart of a method of preparing graphene oxide according to one embodiment of the present disclosure.
Fig. 3 is a flow chart of a method of preparing a silicone rubber material according to one embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
According to one embodiment of the present disclosure, a silicone rubber material is provided. The silicone rubber material comprises a silicone rubber base rubber and a thermally conductive filler. The thermally conductive filler is added to the silicone rubber-based glue. The mass ratio of the heat-conducting filler to the silicone rubber-based adhesive is (1-30): 100. the heat conducting filler comprises a carbon fiber material with the surface loaded with graphene oxide.
The silicone rubber-based rubber includes at least one of methyl vinyl silicone rubber, phenyl vinyl silicone rubber, fluorosilicone rubber, and the like. The silicone rubber-based compound undergoes a crosslinking reaction to form a silicone rubber material.
Graphene oxide is an oxide of graphene. The graphene oxide is in a powder form, a flake form or a solution form. The graphene oxide forms a large number of oxygen-containing functional groups, so that the graphene oxide has the characteristic of active physical and chemical properties.
The carbon fiber material is a fiber material having a carbon content of 90% or more. The carbon fiber material is usually prepared by using acrylic fiber and viscose as raw materials and carrying out high-temperature oxidation and carbonization. The types of the carbon fiber materials include T300, T800, T1000 and the like.
The carbon fiber material having graphene oxide supported on the surface thereof is a material in which graphene oxide is bonded to the surface of a carbon fiber material.
In the embodiment of the disclosure, the carbon fiber material with the graphene oxide loaded on the surface is uniformly dispersed in the silicone rubber-based adhesive. The carbon fiber material forms a three-dimensional network structure in the silicon rubber-based adhesive. The graphene oxide is combined with the three-dimensional network structure, and the graphene oxide has excellent heat-conducting property, so that the three-dimensional network structure forms a heat-conducting path. The silicone rubber material added with the heat-conducting filler has the characteristic of excellent heat-conducting property.
In addition, the carbon fiber material has the characteristic of high strength. The carbon fiber material can form effective combination with the silicon rubber-based adhesive, thereby obviously improving the impact strength of the silicon rubber-based adhesive.
In addition, the inventor of the present application finds that the higher the addition ratio of the heat conductive filler is, the agglomeration phenomenon is easy to occur when the heat conductive filler is mixed in the silicone rubber base rubber, which is not beneficial to the dispersion of the heat conductive filler, and the heat conductive performance of the formed silicone rubber material is difficult to be effectively improved; on the contrary, the lower the adding proportion of the heat-conducting filler is, the poorer the heat-conducting property of the formed silicone rubber material is.
In this example, the mass ratio of the heat conductive filler to the silicone rubber-based adhesive is (1-30): 100. within the range, the heat-conducting filler has good dispersion effect in the silicone rubber base rubber, the silicone rubber base rubber and the heat-conducting filler have good compatibility and good combination effect, and the formed silicone rubber material has high heat-conducting property and high impact strength.
In one example, the mass ratio of the heat conductive filler to the silicone rubber-based adhesive is (5-10): 100. within the range, the dispersion effect of the heat-conducting filler in the silicone rubber base rubber is better, the compatibility and the combination effect of the heat-conducting filler and the silicone rubber base rubber are better, and the formed silicone rubber material has better heat-conducting property and impact strength.
In one example, the silicone rubber-based rubber is methyl vinyl silicone rubber, wherein the molar content of the vinyl siloxane in the methyl vinyl silicone rubber is 0.01% -0.5%.
The methyl vinyl silicone rubber-based rubber is prepared by copolymerizing dimethyl siloxane and vinyl siloxane. The methyl vinyl silicone rubber has the characteristics of high temperature resistance, low temperature resistance and excellent ageing resistance. The methyl vinyl silicone rubber has good compatibility and bonding property with the heat-conducting filler.
Furthermore, the inventors of the present application found that the higher the molar content of the vinyl siloxane, the more sufficient the copolymerization with the dimethylsiloxane is; conversely, a lower content results in insufficient copolymerization of the dimethylsiloxane. In this example, the vinyl siloxane is present in a molar amount of 0.01% to 0.5%. Within the range of the proportion, the methylvinylsiloxane fully generates copolymerization reaction and has excellent performance. And, the binding force of the heat conductive filler and the methylvinylsiloxane is high.
Of course, the silicone rubber-based rubber is not limited to methyl vinyl silicone rubber, but may be at least one of phenyl vinyl silicone rubber, fluorosilicone rubber, and the like.
In one example, the silicone rubber material further includes a cross-linking agent. The cross-linking agent is added to the silicone rubber-based glue. The crosslinking agent includes a polysiloxane. The viscosity of the crosslinking agent is 0.1 pas-100 pas.
The crosslinking agent includes an inorganophilic group and an organophilic group. Wherein the hydrophilic and inorganic groups can chemically react with inorganic matters. The organophilic group is capable of chemically reacting with the organic. The cross-linking agent can combine organic matters and inorganic matters in the silicon rubber material, and obviously improves the temperature resistance, the ageing resistance and the like of the silicon rubber material.
The inventors of the present application found that the viscosity of the crosslinking agent has an important influence on the improvement of the properties of the silicone rubber material. In this example, the viscosity of the crosslinking agent is 0.1 pas to 100 pas. Within this range, the silicone rubber material is excellent in mechanical properties.
In one example, the silicone rubber material further includes a catalyst. The catalyst is added to the silicone rubber-based gum. The catalyst is a platinum-containing vinyl siloxane complex. Wherein, the mass content of the platinum in the catalyst is 0.1-0.5%. The catalyst can effectively accelerate the polymerization reaction of the silicon rubber.
The mass content of the catalyst has an important influence on the improvement of the properties of the silicone rubber material. The larger the mass content of the catalyst, the shorter the sulfidation time; conversely, the smaller the mass content of the catalyst, the longer the sulfidation time. In this example, the catalyst is present in an amount of 0.1% to 1% by mass. Within this range, the silicone rubber material is excellent in mechanical properties.
Of course, the catalyst is not limited to the above-described embodiment, and it is also possible that the catalyst is at least one of chloroplatinic acid, a chloroplatinic acid-isopropyl alcohol complex, and the like.
In one example, the silicone rubber material further includes an inhibitor. The inhibitor is added to the silicone rubber-based gum. The mass ratio of the inhibitor to the silicone rubber-based rubber is (0.01-2): 100.
the inhibitor can control the speed of the polymerization reaction while improving the stability of the silicone rubber material at low temperatures. For example, the inhibitor includes at least one of 3-methyl-1-butyn-3-ol, 3-methyl-1-pentyn-3-ol, 3, 5-dimethyl-1-hexyn-3-ol, 1-ethynyl-1-cyclohexanol, and the like.
The mass ratio of the inhibitor to the silicone rubber-based rubber has an important influence on the improvement of the properties of the silicone rubber material. The larger the mass ratio of the inhibitor to the silicone rubber-based rubber, the slower the reaction of the silicone rubber; conversely, the smaller the mass ratio of inhibitor to silicone rubber-based gum, the faster the silicone reaction. In this example, the mass ratio of the inhibitor to the silicone rubber-based gum is (0.01-2): 100. within this range, the silicone rubber material is excellent in mechanical properties.
In one example, as shown in fig. 1, the method for preparing the thermally conductive filler includes:
101. the acidified carbon fibers are mixed together with an aqueous solution of polyethyleneimine.
The acidified carbon fiber refers to a carbon fiber material subjected to acidification treatment. For example, the acidification treatment includes: the carbon fiber material is mixed with concentrated nitric acid and reacted at a set temperature. And after the reaction is finished, taking out the carbon fiber material, washing and drying to finally obtain the acidified carbon fiber.
Optionally, the concentrated nitric acid has a mass concentration of 60% or more. In the washing, distilled water or deionized water is used to wash off the surface of the reaction product, and the pH of the washed distilled water or deionized water is changed to 7, for example. During drying, the temperature is set to be 60-90 ℃.
And forming carboxyl groups on the surface of the acidified carbon fiber. Under the condition of aqueous solution, carboxyl groups on the surface of the acidified carbon fibers and polyethyleneimine are subjected to acylation reaction to generate amide groups, so that the polyethyleneimine is grafted to the surface of the acidified carbon fibers.
Of course, in other examples, concentrated sulfuric acid may be used to acidify the carbon fibers.
102. And adding an aqueous solution of graphene oxide into the liquid to form a mixed liquid.
103. And reacting the mixed solution under the microwave condition. For example, the mixed solution is placed in a microwave apparatus to perform a microwave reaction. For example, the conditions for the microwave reaction are:
frequency: 500MHz-6000 MHz. Preferably, the frequency of the microwave reaction is 2450 MHz; the reaction time was 30 minutes. Under the condition, the microwave reaction is sufficient, and the graphene oxide can be effectively loaded on the surface of the acidified carbon fiber.
104. The reacted material was adjusted to neutral. The reacted material is washed, for example, with deionized water until a pH of 7 is reached.
105. The neutralized material was dried. For example, the material obtained in step 104 is placed in an oven for drying. And finally obtaining the carbon fiber material with the surface loaded with the graphene oxide.
In one example, as shown in fig. 2, the method for preparing graphene oxide includes:
201. graphite is provided along with a strong oxidizer. For example, the graphite is flake graphite, cryptocrystalline graphite, or the like.
202. Adding the graphite to the strong oxidant. The graphite is oxidized by a strong oxidant to produce graphene oxide. Wherein the strong oxidant comprises mixed liquid of concentrated sulfuric acid, sodium nitrate, hydrogen peroxide and potassium permanganate.
For example, in the preparation process, concentrated sulfuric acid and sodium nitrate are mixed with graphite; then, adding a potassium permanganate solution; finally, hydrogen peroxide is added. The above preparation process may be carried out in a constant temperature water area. The mass concentration of the concentrated sulfuric acid is 80-95%. The mass concentration of the potassium permanganate solution is 50-95%. The mass concentration of the hydrogen peroxide is 30-40%. The final reaction liquid is separated by filtration or centrifugation. And dispersing the separated product in water again to form a suspension through ultrasonic dispersion, and volatilizing the suspension to obtain the graphene oxide.
Of course, the preparation method of the graphene oxide is not limited to the above embodiment, and those skilled in the art can select the graphene oxide according to actual needs.
In one example, the mass content of the graphene oxide in the heat conductive filler is 0.5% -2%. Within this range, the heat conductive filler has a better heat conductive effect. Preferably, the mass content of the graphene oxide is 1%.
According to another embodiment of the present disclosure, a method of preparing a silicone rubber material is provided. As shown in fig. 3, the preparation method includes:
301. a silicone rubber-based adhesive and a thermally conductive filler are provided.
302. Adding the heat-conducting filler into the silicon rubber-based adhesive, and uniformly mixing; wherein the mass ratio of the heat-conducting filler to the silicone rubber-based adhesive is (1-30): 100, the heat conducting filler comprises a carbon fiber material with a surface loaded with graphene oxide.
In a specific example of the present disclosure, the silicone rubber material further includes white carbon black, a cross-linking agent, a catalyst, and other additives.
During preparation, materials such as silicon rubber base rubber, white carbon black and the heat-conducting filler are uniformly mixed in an internal mixer according to a set proportion;
then, on an open mill, the materials are remilled, and a catalyst and a cross-linking agent are added;
finally, the evenly mixed materials are molded and formed at the temperature of 80-160 ℃ to obtain the silicon rubber material product.
The preparation method has simple process and easy operation.
Example 1
The formula comprises the following components in parts by weight: 100g of methyl vinyl silicone rubber, 3g of hydrogen-containing silicone oil, 2.5g of graphene oxide-loaded carbon fiber, 30g of white carbon black, 0.4g of platinum catalyst, and phenylacetylene inhibitor: 0.05 g.
Firstly, uniformly mixing silicon rubber base rubber, white carbon black and carbon fiber loaded with graphene oxide in an internal mixer;
then, on an open mill, after the materials are remilled, hydrogen-containing silicone oil, a platinum catalyst and a phenylacetylene inhibitor are added;
then, after uniformly mixing, the mixture was compression-molded at 150 ℃ to obtain a silicone rubber material.
Example 2
The formula comprises the following components in parts by weight: 100g of methyl vinyl silicone rubber, 4g of hydrogen-containing silicone oil, 5g of graphene oxide-loaded carbon fiber, 30g of white carbon black, 0.5g of platinum catalyst, and a phenylacetylene inhibitor: 0.08 g.
Firstly, uniformly mixing silicon rubber base rubber, white carbon black and carbon fiber loaded with graphene oxide in an internal mixer.
Then on an open mill, the materials are remilled, and then hydrogen-containing silicone oil, a platinum catalyst and a phenylacetylene inhibitor are added.
Then, after uniformly mixing, the mixture was compression-molded at 150 ℃ to obtain a silicone rubber material.
Example 3
The formula comprises the following components in parts by weight: 100g of methyl vinyl silicone rubber, 6g of hydrogen-containing silicone oil, 7.5g of graphene oxide-loaded carbon fiber, 30g of white carbon black, 0.6g of platinum catalyst, and phenylacetylene inhibitor: 0.1 g.
Firstly, uniformly mixing silicon rubber base rubber, white carbon black and carbon fiber loaded with graphene oxide in an internal mixer.
Then, on an open mill, the materials are remilled, and then hydrogen-containing silicone oil, a platinum catalyst and a phenylacetylene inhibitor are added.
Then, after uniformly mixing, the mixture was compression-molded at 150 ℃ to obtain a silicone rubber material.
Example 4
The formula comprises the following components in parts by weight: 100g of methyl vinyl silicone rubber, 8g of hydrogen-containing silicone oil, 10g of graphene oxide-loaded carbon fiber, 20g of white carbon black, 0.6g of platinum catalyst, and a phenylacetylene inhibitor: 0.12 g.
Firstly, uniformly mixing silicon rubber base rubber, white carbon black and carbon fiber loaded with graphene oxide in an internal mixer.
Then on an open mill, the materials are remilled, and then hydrogen-containing silicone oil, a platinum catalyst and a phenylacetylene inhibitor are added.
Then, after mixing uniformly, compression molding is carried out at 150 ℃ to obtain the silicon rubber material.
Example 5
The formula comprises the following components in parts by weight: 100g of methyl vinyl silicone rubber, 8g of hydrogen-containing silicone oil, 12.5g of graphene oxide-loaded carbon fiber, 20g of white carbon black, 0.4g of platinum catalyst, and phenylacetylene inhibitor: 0.15 g.
Firstly, uniformly mixing silicon rubber base rubber, white carbon black and carbon fiber loaded with graphene oxide in an internal mixer.
Then on an open mill, the materials are remilled, and then hydrogen-containing silicone oil, a platinum catalyst and a phenylacetylene inhibitor are added.
Then, after uniformly mixing, the mixture was compression-molded at 150 ℃ to obtain a silicone rubber material.
Example 6
The formula comprises the following components in parts by weight: 100g of methyl vinyl silicone rubber, 8g of hydrogen-containing silicone oil, 15g of graphene oxide-loaded carbon fiber, 20g of white carbon black, 0.5g of platinum catalyst, and a phenylacetylene inhibitor: 0.18 g.
Firstly, uniformly mixing silicon rubber base rubber, white carbon black and carbon fiber loaded with graphene oxide in an internal mixer.
Then, on an open mill, the materials are remilled, and then hydrogen-containing silicone oil, a platinum catalyst and a phenylacetylene inhibitor are added.
Then, after mixing uniformly, compression molding is carried out at 150 ℃ to obtain the silicon rubber material.
Comparative example 1
The formula comprises the following components in parts by weight: 100g of methyl vinyl silicone rubber, 8g of hydrogen-containing silicone oil, 10g of carbon fiber, 5g of graphene, 20g of white carbon black, 0.5g of platinum catalyst, and phenylacetylene inhibitor: 0.15 g.
Firstly, uniformly mixing silicon rubber base rubber, white carbon black and carbon fiber loaded with graphene oxide in an internal mixer.
Then on an open mill, the materials are remilled, and then hydrogen-containing silicone oil, a platinum catalyst and a phenylacetylene inhibitor are added.
Then, after mixing uniformly, compression molding is carried out at 150 ℃ to obtain the silicon rubber material.
Comparative example 2
The formula comprises the following components in parts by weight: 100g of methyl vinyl silicone rubber, 8g of hydrogen-containing silicone oil, 10g of carbon fiber, 10g of graphene, 20g of white carbon black, 0.5g of platinum catalyst, and phenylacetylene inhibitor: 0.15 g.
Firstly, uniformly mixing silicon rubber base rubber, white carbon black and carbon fiber loaded with graphene oxide in an internal mixer.
Then on an open mill, the materials are remilled, and then hydrogen-containing silicone oil, a platinum catalyst and a phenylacetylene inhibitor are added.
Then, after uniformly mixing, the mixture was compression-molded at 150 ℃ to obtain a silicone rubber material.
TABLE 1 comparative table of heat dissipation coefficient and mechanical properties of silicone rubber materials prepared in examples and comparative examples
As can be seen from the above table, the silicone rubber materials prepared in examples 1-6 all had higher thermal conductivity, tensile strength and tear strength than the silicone rubber materials prepared in comparative examples 1-2.
The carbon fiber material with the surface loaded with the graphene oxide is added, so that the heat-conducting property and the mechanical property of the silicon rubber material can be obviously improved.
In the above embodiments, the differences between the embodiments are described in emphasis, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in consideration of brevity of the text.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A silicone rubber material is characterized by comprising a silicone rubber base rubber and a heat-conducting filler, wherein the heat-conducting filler is added into the silicone rubber base rubber, and the mass ratio of the heat-conducting filler to the silicone rubber base rubber is (1-30): 100, wherein the heat conducting filler comprises a carbon fiber material with a surface loaded with graphene oxide.
2. The silicone rubber material according to claim 1, wherein the mass ratio of the thermally conductive filler to the silicone rubber-based rubber is (5-10): 100.
3. the silicone rubber material according to claim 1, wherein the silicone rubber-based rubber is a methyl vinyl silicone rubber, wherein the molar content of vinyl siloxane in the methyl vinyl silicone rubber is 0.01% to 0.5%.
4. The silicone rubber material of claim 1, further comprising a cross-linking agent added to the silicone rubber-based gum, the cross-linking agent comprising a polysiloxane, wherein the cross-linking agent has a viscosity of 0.1-100 Pa-s.
5. The silicone rubber material according to claim 1, further comprising a catalyst added to the silicone rubber-based rubber, the catalyst being a vinyl siloxane complex containing platinum, wherein the mass content of platinum in the catalyst is 0.1% to 0.5%.
6. The silicone rubber material according to claim 1, further comprising an inhibitor added to the silicone rubber-based gum, wherein a mass ratio of the inhibitor to the silicone rubber-based gum is (0.1-2): 100.
7. the silicone rubber material according to claim 1, wherein the method of preparing the thermally conductive filler comprises:
mixing the acidified carbon fibers with an aqueous solution of polyethyleneimine;
adding an aqueous solution of graphene oxide into the liquid to form a mixed liquid;
reacting the mixed solution under the microwave condition;
adjusting the reacted substances to be neutral;
the neutralized material was dried.
8. The silicone rubber material of claim 7, wherein the graphene oxide preparation method comprises:
providing graphite and a strong oxidant;
adding the graphite into the strong oxidant, and oxidizing the graphite by the strong oxidant to generate graphene oxide, wherein the strong oxidant comprises a mixed solution of concentrated sulfuric acid, sodium nitrate, hydrogen peroxide and potassium permanganate.
9. The silicone rubber material according to claim 1, wherein the content of graphene oxide in the thermally conductive filler is 0.5% -2%.
10. A method for preparing a silicone rubber material, comprising:
providing a silicon rubber base adhesive and a heat-conducting filler;
adding the heat-conducting filler into the silicon rubber-based adhesive, and uniformly mixing; wherein the mass ratio of the heat-conducting filler to the silicone rubber-based adhesive is (1-30): 100, the heat conducting filler comprises a carbon fiber material with a surface loaded with graphene oxide.
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