Silicone rubber for brain-computer interface and preparation method thereof

Abstract

The invention discloses silicone rubber for a brain-computer interface and a preparation method thereof, and relates to the technical field of silicone rubber, the silicone rubber comprises the following components by weight: 60-80 parts of methyl vinyl silicone rubber, 3.5-5 parts of modified boron nitride, 2.5-5 parts of a flame retardant, 1.5-3 parts of an antibacterial agent, and 8-12 parts of a vulcanizing agent. According to the silicone rubber for the brain-computer interface and the preparation method thereof, boron nitride is modified, so that the heat dissipation capability of the silicone rubber can be effectively improved, heat dissipation of electronic elements is facilitated, and overheating damage is avoided; the modified boron nitride has improved dispersibility, is more uniformly distributed in the silicone rubber, prevents agglomeration, is convenient for processing and molding, and increases the viscosity of the silicone rubber, thereby enhancing the cohesion of the silicone rubber; meanwhile, the flexibility of the material can be well improved, the brittleness of the silicone rubber is reduced, and the electronic silicone rubber can better maintain physical properties under different environmental conditions; the thermal stability and the chemical stability of the material can be improved, and the performance of the silicone rubber can be kept stable in a complex use environment.

Description

Technical Field

[0001] The present invention relates to the technical field of silicone rubber, and in particular to silicone rubber for brain-computer interface and a preparation method thereof. Background Art

[0002] The Chinese patent with publication number CN101885918A discloses a thermally conductive silicone rubber, which contains the following components in parts by weight: 22-25 parts of methyl vinyl organopolysiloxane with a vinyl mole fraction of 0.03%; 4-5 parts of methyl vinyl organopolysiloxane with a vinyl mole fraction of 0.05%; 18-20 parts of methyl silicone oil with a polymerization degree of 1000CS; 28-75 parts of Al 2 O 3 ; 0.9-1 parts of coupling agent; 0.36-0.4 parts of zinc stearate. The thermally conductive silicone rubber of the present invention has the advantages of high thermal conductivity, heat resistance and low compressibility, and its thermal conductivity coefficient is greater than 3. The invention improves the operability of the roller and improves the physical properties of demolding. The products made by the present invention can achieve permanent non-deformation and have very good stability during storage. The thermally conductive silicone rubber of the present invention can be used as thermal conductive materials or heat dissipation materials in automobiles and electrical and electronic equipment that require sufficient heat resistance, thermal conductivity and rubber elasticity. However, the flame retardant properties of the silicone rubber prepared by the above-mentioned prior art scheme need to be improved; to this end, the present invention provides a silicone rubber for a brain-computer interface and a preparation method thereof to solve the above-mentioned problems. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a silicone rubber for a brain-computer interface and a preparation method thereof, which solves the problems mentioned in the above background technology.

[0004] To achieve the above purpose, the present invention is implemented by the following technical scheme: a silicone rubber for brain-computer interface, comprising the following components in parts by weight: 60-80 parts of methyl vinyl silicone rubber, 3.5-5 parts of modified boron nitride, 2.5-5 parts of flame retardant, 1.5-3 parts of antibacterial agent, and 8-12 parts of vulcanizing agent;

[0005] Wherein, the vulcanizing agent is dicumyl peroxide.

[0006] A method for preparing silicone rubber for a brain-computer interface, specifically comprising the following preparation steps:

[0007] Step 1, preparing modified boron nitride, flame retardant and antibacterial agent;

[0008] Step 2: Pour the methyl vinyl silicone rubber and the vulcanizing agent into a mixer, mix for 5-8 minutes, then add the modified boron nitride, flame retardant and antibacterial agent, and continue mixing for 15-20 minutes to obtain silicone rubber for brain-computer interface.

[0009] Preferably, the preparation method of the modified boron nitride is:

[0010] (1) Place 1-2.5 g of boron nitride in a muffle furnace, heat it up and then keep it warm;

[0011] (2) After cooling naturally, take out the mixture and wash it with deionized water for 3-4 times;

[0012] (3) Pour into 100-110 mL of xylene solution and perform ultrasonic stirring treatment;

[0013] (4) adding 10-13.5 g of low molecular weight hydroxy silicone oil and 0.01-0.04 g of dibutyltin dilaurate in sequence, heating the oil bath to 95-110° C., and reacting for 6-8 h;

[0014] (5) After the reaction is completed, the reaction solution is filtered through a microporous filter membrane with a pore size of 0.22-0.25 μm, and the product is then washed alternately with ethanol and water 2-3 times;

[0015] (6) Firstly place it in a vacuum oven at 55-65° C. and dry it for 5-7 hours, then heat it to 120-140° C. and dry it for 3-5 hours to obtain the modified boron nitride.

[0016] Preferably, in said (1), the temperature is raised to 850-1000° C. and kept warm for 2.5-3 h.

[0017] Preferably, the preparation method of the flame retardant is:

[0018] ① After mixing melamine polyphosphate and nickel nitrate hexahydrate, add deionized water, heat to 35-45°C, and stir to react for 2.5-4h;

[0019] ②After cooling to room temperature, vacuum filter, rinse with deionized water 3-5 times, and collect the filter cake;

[0020] ③Put the filter cake in a vacuum drying oven at 65-75℃ and dry it for 10-12h, then take it out and grind it;

[0021] ④ Pour into ethyl acetate, then add epoxy modified silicone resin, stir and react at a constant temperature of 35-40℃ for 25-30min;

[0022] ⑤ Place in a vacuum drying oven at 70-80°C and dry for 3.5-4h, then cool to room temperature, perform vacuum filtration, and wash with ethyl acetate 3-5 times to collect the filter cake;

[0023] ⑥ Place the filter cake in a vacuum drying oven at 65-70°C and dry it for 10-12 hours, then take it out and grind it to obtain the flame retardant.

[0024] Preferably, in the flame retardant, the weight proportions of the components are: 4.5-6 parts of melamine polyphosphate, 3.2-5 parts of nickel nitrate hexahydrate, 130-150 parts of deionized water, 35-50 parts of ethyl acetate, and 0.5-0.8 parts of epoxy-modified silicone resin.

[0025] Preferably, the preparation method of the antibacterial agent is:

[0026] Ⅰ. Add 0.4-0.8 mL of AgNO 3 The solution was slowly added dropwise to 50-70 mL of glucose aqueous solution, then poured into a polytetrafluoroethylene liner and ultrasonically treated for 10-15 min;

[0027] Ⅱ. Place in a drying oven under airtight conditions and react for 4.5-6 hours;

[0028] III. After the reaction is completed, cool naturally to room temperature;

[0029] IV. Centrifuge the reaction product, wash it with ethanol and distilled water for 3-4 times respectively, and finally dry it in a drying oven at 45-55°C for 10-12h.

[0030] Preferably, the AgNO 3 The concentration of the solution is 0.03 mol / L, and the concentration of the glucose aqueous solution is 0.5 mol / L.

[0031] Beneficial Effects

[0032] The present invention provides a silicone rubber for brain-computer interface and a preparation method thereof. Compared with the prior art, it has the following beneficial effects:

[0033] (1) The silicone rubber for brain-computer interface and its preparation method can effectively improve the heat dissipation capacity of silicone rubber by modifying boron nitride, help electronic components dissipate heat, and avoid overheating damage; and the modified boron nitride has improved dispersibility and is more evenly distributed in the silicone rubber, preventing agglomeration, facilitating processing and molding, and increasing the viscosity of the silicone rubber, thereby enhancing the cohesive force of the silicone rubber; at the same time, it can also improve the flexibility of the material, reduce the brittleness of the silicone rubber, and allow the electronic silicone rubber to better maintain its physical properties under different environmental conditions; and can improve the thermal stability and chemical stability of the material, which helps the silicone rubber maintain stable performance in complex use environments; because boron nitride itself has a low dielectric constant, after it is modified and added to the silicone rubber, the dielectric constant of the silicone rubber can be further reduced, so that when it is used in electronic equipment, the signal transmission is faster and the loss is smaller.

[0034] (2) The silicone rubber for brain-computer interface and its preparation method, through the addition of flame retardants, will form a stable and dense expanded carbon layer during combustion, which will block the transfer of heat and oxygen, effectively slow down the spread of fire, reduce the burning speed and heat release rate of the material, enhance the heat resistance and weather resistance of silicone rubber, so that it can still maintain good physical properties and flame retardant properties in harsh environments such as high temperature and humidity, and extend the service life of electronic components; and the flame retardant can improve the mechanical properties of silicone rubber, making it not easy to break or damage during use, thereby ensuring the normal operation of electronic components.

[0035] (3) The silicone rubber for brain-computer interface and its preparation method, through the addition of antibacterial agents, can inhibit the growth and reproduction of various bacteria, fungi and viruses, prevent the growth of microorganisms on the surface of silicone rubber, reduce electronic equipment failures caused by microbial corrosion or contamination, and at the same time maintain the stability of silicone rubber viscosity to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The SEM images of the boron nitride before and after modification provided by the present invention;

[0037] Figure 2 This is a SEM image of the melamine polyphosphate provided by the present invention and the flame retardant in Example 1. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] A method for preparing silicone rubber for a brain-computer interface, specifically comprising the following preparation steps:

[0041] Step 1, preparing modified boron nitride, flame retardant and antibacterial agent;

[0042] The preparation method of modified boron nitride is as follows: 1g of boron nitride is placed in a muffle furnace, heated to 850°C, and kept warm for 2.5h; taken out after natural cooling, washed with deionized water for 3 times; poured into 100mL of xylene solution, and subjected to ultrasonic stirring treatment; 10g of low molecular weight hydroxy silicone oil and 0.01g of dibutyltin dilaurate are added in sequence, the oil bath is heated to 95°C, and reacted for 6h; after the reaction is completed, the reacted solution is filtered through a microporous filter membrane with a pore size of 0.22μm, and the product is then washed alternately with ethanol and water for 2 times; first placed in a vacuum oven at 55°C for 5h, and then heated to 120°C for 3h to obtain the modified boron nitride;

[0043] The preparation method of the flame retardant is as follows: 4.5g of melamine polyphosphate and 3.2g of nickel nitrate hexahydrate are mixed, 130g of deionized water is added, the temperature is raised to 35°C, and the mixture is stirred for reaction for 2.5h; after cooling to room temperature, vacuum filtration is performed, and the mixture is rinsed with deionized water for 3 times, and the filter cake is collected; the filter cake is placed in a vacuum drying oven at 65°C and dried for 10h, and then taken out and ground; the mixture is poured into 35g of ethyl acetate, and then 0.5g of epoxy-modified silicone resin is added, and the mixture is stirred for reaction for 25min at a constant temperature of 35°C; the mixture is placed in a vacuum drying oven at 70°C and dried for 3.5h, and then cooled to room temperature, vacuum filtration is performed, and the mixture is washed with ethyl acetate for 3 times, and the filter cake is collected; the filter cake is placed in a vacuum drying oven at 65°C and dried for 10h, and then taken out and ground to obtain the flame retardant;

[0044] The preparation method of the antibacterial agent is as follows: 0.4 mL of AgNO with a concentration of 0.03 mol / L 3 The solution was slowly added dropwise to 50 mL of a 0.5 mol / L glucose aqueous solution, and then poured into a polytetrafluoroethylene liner and subjected to ultrasonic treatment for 10 min; the reaction was carried out in a drying oven under closed conditions for 4.5 h; after the reaction was completed, the reaction was naturally cooled to room temperature; the reaction product was centrifuged, and then washed with ethanol and distilled water for 3 times respectively, and finally dried in a drying oven at 45°C for 10 h;

[0045] Step 2: Pour 60g of methyl vinyl silicone rubber and 12g of vulcanizing agent into a mixer. After mixing for 5 minutes, add 5g of modified boron nitride, 5g of flame retardant, and 3g of antibacterial agent, and continue mixing for 15 minutes to obtain silicone rubber for brain-computer interface.

[0046] Example 2

[0047] A method for preparing silicone rubber for brain-computer interface, specifically comprising the following preparation steps:

[0048] Step 1, preparing modified boron nitride, flame retardant and antibacterial agent;

[0049] The preparation method of modified boron nitride is as follows: 1.5 g of boron nitride is placed in a muffle furnace, heated to 900° C., and kept warm for 2.8 h; taken out after natural cooling, washed with deionized water 4 times; poured into 105 mL of xylene solution, and subjected to ultrasonic stirring treatment; 12.5 g of low molecular weight hydroxy silicone oil and 0.03 g of dibutyltin dilaurate are added in sequence, the oil bath is heated to 100° C., and reacted for 7 h; after the reaction is completed, the reacted solution is filtered through a microporous filter membrane with a pore size of 0.24 μm, and the product is then washed alternately with ethanol and water twice; first placed in a vacuum oven at 60° C. and dried for 6 h, and then heated to 130° C. and dried for 4 h, to obtain the modified boron nitride;

[0050] The preparation method of the flame retardant is as follows: 5.5 g of melamine polyphosphate and 4.2 g of nickel nitrate hexahydrate are mixed, 140 g of deionized water is added, the temperature is raised to 40° C., and the mixture is stirred for reaction for 3.5 hours; after cooling to room temperature, the mixture is vacuum filtered, and the mixture is rinsed 4 times with deionized water to collect the filter cake; the filter cake is placed in a vacuum drying oven at 70° C. and dried for 11 hours, and then taken out and ground; the mixture is poured into 45 g of ethyl acetate, and 0.6 g of epoxy-modified silicone resin is added, and the mixture is stirred for reaction for 28 minutes at a constant temperature of 38° C.; the mixture is placed in a vacuum drying oven at 75° C. and dried for 3.7 hours, and then cooled to room temperature, the mixture is vacuum filtered, and the mixture is washed 4 times with ethyl acetate to collect the filter cake; the filter cake is placed in a vacuum drying oven at 66° C. and dried for 11 hours, and then taken out and ground to obtain the flame retardant;

[0051] The preparation method of the antibacterial agent is as follows: 0.6 mL of AgNO with a concentration of 0.03 mol / L 3 The solution was slowly added dropwise to 60 mL of a 0.5 mol / L glucose aqueous solution, and then poured into a polytetrafluoroethylene liner and subjected to ultrasonic treatment for 12 min; the reaction was carried out in a drying oven under closed conditions for 5 h; after the reaction was completed, the reaction was naturally cooled to room temperature; the reaction product was centrifuged, and then washed with ethanol and distilled water for 4 times respectively, and finally dried in a drying oven at 50°C for 11 h;

[0052] Step 2: Pour 70g of methyl vinyl silicone rubber and 10g of vulcanizing agent into a mixer. After mixing for 6 minutes, add 4g of modified boron nitride, 3.5g of flame retardant, and 2g of antibacterial agent, and continue mixing for 18 minutes to obtain silicone rubber for brain-computer interface.

[0053] Example 3

[0054] A method for preparing silicone rubber for a brain-computer interface, specifically comprising the following preparation steps:

[0055] Step 1, preparing modified boron nitride, flame retardant and antibacterial agent;

[0056] The preparation method of modified boron nitride is as follows: 2.5g of boron nitride is placed in a muffle furnace, heated to 1000°C, and kept warm for 3h; taken out after natural cooling, washed with deionized water 4 times; poured into 110mL of xylene solution, and ultrasonically stirred; 13.5g of low molecular weight hydroxy silicone oil and 0.04g of dibutyltin dilaurate are added in sequence, the oil bath is heated to 110°C, and the reaction is performed for 8h; after the reaction is completed, the solution after the reaction is filtered through a microporous filter membrane with a pore size of 0.25μm, and the product is then washed alternately with ethanol and water 3 times; first placed in a vacuum oven at 65°C for 7h, and then heated to 140°C for 5h to obtain the modified boron nitride;

[0057] The preparation method of the flame retardant is as follows: 6g of melamine polyphosphate and 5g of nickel nitrate hexahydrate are mixed, 150g of deionized water is added, the temperature is raised to 45°C, and the mixture is stirred for reaction for 4h; after cooling to room temperature, vacuum filtration is performed, and the mixture is rinsed with deionized water for 5 times, and the filter cake is collected; the filter cake is placed in a vacuum drying oven at 75°C and dried for 12h, taken out, and ground; poured into 50g of ethyl acetate, 0.8g of epoxy-modified silicone resin is added, and the mixture is stirred for reaction for 30min at a constant temperature of 40°C; after drying in a vacuum drying oven at 80°C for 4h, the mixture is cooled to room temperature, vacuum filtration is performed, and the mixture is washed with ethyl acetate for 5 times, and the filter cake is collected; after drying the filter cake in a vacuum drying oven at 70°C for 12h, the filter cake is taken out, and ground to obtain the flame retardant;

[0058] The preparation method of the antibacterial agent is as follows: 0.8 mL of AgNO with a concentration of 0.03 mol / L 3 The solution was slowly added dropwise to 70 mL of a 0.5 mol / L glucose aqueous solution, and then poured into a polytetrafluoroethylene liner and subjected to ultrasonic treatment for 15 min; the reaction was carried out in a drying oven under closed conditions for 6 h; after the reaction was completed, the reaction was naturally cooled to room temperature; the reaction product was centrifuged, and then washed with ethanol and distilled water for 4 times respectively, and finally dried in a drying oven at 55°C for 12 h;

[0059] Step 2: Pour 80g of methyl vinyl silicone rubber and 8g of vulcanizing agent into a mixer. After mixing for 8 minutes, add 3.5g of modified boron nitride, 2.5g of flame retardant, and 1.5g of antibacterial agent. Continue mixing for 20 minutes to obtain silicone rubber for brain-computer interface.

[0060] Comparative Example 1

[0061] Compared with Example 1, the difference is that the modified boron nitride in Example 1 is replaced by boron nitride; the rest remains unchanged.

[0062] Comparative Example 2

[0063] Compared with Example 1, the difference is that the flame retardant in Example 1 is replaced by melamine polyphosphate; the rest remains unchanged.

[0064] Comparative Example 3

[0065] Compared with Example 1, the difference is that the antibacterial agent in Example 1 is replaced by AgNO 3 solution; the rest remain unchanged.

[0066] Limiting Oxygen Index (LOI) test: The test was conducted according to ASTM D2863-97; the results are shown in Table 1.

[0067] Vertical burning test: The test was conducted according to ASTM D4804; the results are shown in Table 1.

[0068] Antibacterial rate test: Place the sample at 1x10 5 cfu / ml bacterial suspension, after shaking at a speed of 150rpm / min for a certain period of time, 0.1mL of the reaction solution was spread on the nutrient agar medium, placed in a constant temperature incubator at 37℃ and inverted for 18-24h, the colonies were observed and counted, and each group was repeated three times; the results are shown in Table 1; the antibacterial rate calculation formula is:

[0069]

[0070] Wherein, R is the inhibition rate, %; A is the number of bacterial colonies before the experiment; B is the number of bacterial colonies after the experiment.

[0071] Table 1

[0072]

[0073] Tensile strength test: The test was conducted in accordance with GB / T528-2009; the results are shown in Table 2.

[0074] Adhesion test: The test was conducted in accordance with GB / T7124-2008; the results are shown in Table 2.

[0075] Dielectric constant test: The test was performed using a broadband dielectric impedance spectrometer; the results are shown in Table 2.

[0076] Table 2

[0077] Dielectric constant Tensile strength / MPa Bond strength / MPa Example 1 3.6 4.93 0.431 Example 2 3.7 4.92 0.431 Example 3 3.6 4.93 0.428 Comparative Example 1 4.8 4.12 0.359 Comparative Example 2 4.3 3.57 0.366 Comparative Example 3 4.6 4.18 0..81

[0078] like Figure 1 As shown, compared with the boron nitride before modification, the modified boron nitride is exfoliated to a certain extent.

[0079] like Figure 2As shown, the polyphosphate melamine particles are of different sizes, and most of the particles have irregular structures and are agglomerated; however, after the flame retardant prepared in Example 1, i.e., polyphosphate melamine, is loaded with transition metal nickel, its surface roughness is reduced, the polyhedral morphology is regular, and the particles are evenly dispersed.

[0080] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0081] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0082] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A silicone rubber for brain-computer interface, characterized in that: The invention comprises the following components in parts by weight: 60-80 parts of methyl vinyl silicone rubber, 3.5-5 parts of modified boron nitride, 2.5-5 parts of flame retardant, 1.5-3 parts of antibacterial agent and 8-12 parts of vulcanizing agent; Wherein, the vulcanizing agent is dicumyl peroxide.

2. A method for preparing silicone rubber for brain-computer interface according to claim 1, characterized in that: The specific preparation steps include: Step 1, preparing modified boron nitride, flame retardant and antibacterial agent; Step 2: Pour the methyl vinyl silicone rubber and the vulcanizing agent into a mixer, mix for 5-8 minutes, then add the modified boron nitride, flame retardant and antibacterial agent, and continue mixing for 15-20 minutes to obtain silicone rubber for brain-computer interface.

3. The method for preparing silicone rubber for brain-computer interface according to claim 2, characterized in that: The preparation method of the modified boron nitride is: (1) Place 1-2.5 g of boron nitride in a muffle furnace, heat it up and then keep it warm; (2) After cooling naturally, take out the mixture and wash it with deionized water for 3-4 times; (3) Pour into 100-110 mL of xylene solution and perform ultrasonic stirring treatment; (4) adding 10-13.5 g of low molecular weight hydroxy silicone oil and 0.01-0.04 g of dibutyltin dilaurate in sequence, heating the oil bath to 95-110° C., and reacting for 6-8 h; (5) After the reaction is completed, the reaction solution is filtered through a microporous filter membrane with a pore size of 0.22-0.25 μm, and the product is then washed alternately with ethanol and water 2-3 times; (6) Firstly place it in a vacuum oven at 55-65° C. and dry it for 5-7 hours, then heat it to 120-140° C. and dry it for 3-5 hours to obtain the modified boron nitride.

4. The method for preparing silicone rubber for brain-computer interface according to claim 3, characterized in that: In the step (1), the temperature is raised to 850-1000° C. and maintained at this temperature for 2.5-3 hours.

5. The method for preparing silicone rubber for brain-computer interface according to claim 2, characterized in that: The preparation method of the flame retardant is: ① After mixing melamine polyphosphate and nickel nitrate hexahydrate, add deionized water, heat to 35-45°C, and stir to react for 2.5-4h; ②After cooling to room temperature, vacuum filter, rinse with deionized water 3-5 times, and collect the filter cake; ③Put the filter cake in a vacuum drying oven at 65-75℃ and dry it for 10-12h, then take it out and grind it; ④ Pour into ethyl acetate, then add epoxy modified silicone resin, stir and react at a constant temperature of 35-40℃ for 25-30min; ⑤ Place in a vacuum drying oven at 70-80°C and dry for 3.5-4h, then cool to room temperature, perform vacuum filtration, and wash with ethyl acetate 3-5 times to collect the filter cake; ⑥ Place the filter cake in a vacuum drying oven at 65-70°C and dry it for 10-12 hours, then take it out and grind it to obtain the flame retardant.

6. The method for preparing silicone rubber for brain-computer interface according to claim 5, characterized in that: The weight proportions of the components in the flame retardant are: 4.5-6 parts of melamine polyphosphate, 3.2-5 parts of nickel nitrate hexahydrate, 130-150 parts of deionized water, 35-50 parts of ethyl acetate, and 0.5-0.8 parts of epoxy-modified organic silicon resin.

7. The method for preparing silicone rubber for brain-computer interface according to claim 2, characterized in that: The preparation method of the antibacterial agent is: Ⅰ. Slowly add 0.4-0.8 mL of AgNO3 solution to 50-70 mL of glucose aqueous solution, then pour into a polytetrafluoroethylene liner and ultrasonically treat for 10-15 minutes; Ⅱ. Place in a drying oven under airtight conditions and react for 4.5-6 hours; III. After the reaction is completed, cool naturally to room temperature; IV. Centrifuge the reaction product, wash it with ethanol and distilled water for 3-4 times respectively, and finally dry it in a drying oven at 45-55°C for 10-12h.

8. The method for preparing silicone rubber for brain-computer interface according to claim 5, characterized in that: The concentration of the AgNO3 solution is 0.03 mol / L, and the concentration of the glucose aqueous solution is 0.5 mol / L.

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