Tear-resistant high-elastic conductive silicone rubber and preparation method thereof, and fabric with tear-resistant high-elastic conductive silicone rubber circuit

Abstract

The present application relates to the technical field of conductive silicone rubber preparation, and more specifically, it relates to a tear-resistant high-elastic conductive silicone rubber and a preparation method thereof, and a fabric with a tear-resistant high-elastic conductive silicone rubber circuit. The tear-resistant high-elastic conductive silicone rubber is made of the following raw materials in parts by weight: 80-120 parts of silicone rubber, 30-50 parts of conductive filler, 10-50 parts of chitosan, 2-3 parts of waterproofing agent, 4-8 parts of hydroxy silicone oil, 0.5-1 part of cross-linking agent, 1-2 parts of accelerator, and 0.5-1 part of antioxidant, each part of the conductive filler is prepared by mixing nanocarbon tubes and nanosilver in a weight ratio of (15-35):6. The tear-resistant high-elastic conductive silicone rubber prepared by adopting the above formula has good tear resistance, high elasticity, waterproofness, skin affinity, conductivity and durability, and is used to replace silver paste circuits, which well solves the problems of poor tear resistance, elasticity and water resistance of silver paste circuits.

Description

Technical Field

[0001] The present application relates to the technical field of conductive silicone rubber preparation, and more specifically, to a tear-resistant highly elastic conductive silicone rubber and a preparation method thereof, and a fabric with a tear-resistant highly elastic conductive silicone rubber circuit. Background Art

[0002] With the development of science and technology, people's requirements for clothing are not only beautiful and warm, but also have more functions, such as massage underwear with massage function. By setting a low-frequency electrical stimulation system in the underwear, the low-frequency electrical stimulation system releases low-frequency electrical stimulation, simulates nerve biological signals, releases high-quality low-frequency electrical pulses, promotes blood circulation, and achieves the effect of massage. The low-frequency electrical stimulation system requires the use of conductive wires or conductive sheets and power supplies. The structure is relatively complex and the volume is large. When wearing, the presence of wires or conductive sheets can be clearly felt, which reduces the comfort.

[0003] To address the above problems, people coat silver paste on the surface of fabric to form circuits instead of conductive wires or conductive sheets. The silver paste circuit is thinner, and the foreign body sensation when worn is greatly reduced.

[0004] However, silver paste circuits have poor tear resistance, elasticity and water resistance, and are easily deformed or damaged after repeated washing, greatly reducing their service life. Summary of the invention

[0005] In order to solve the problem of poor tear resistance, elasticity and water resistance of silver paste circuits, the present application provides a tear-resistant high-elastic conductive silicone rubber and a preparation method thereof, and a fabric with a tear-resistant high-elastic conductive silicone rubber circuit.

[0006] In a first aspect, the present application provides a tear-resistant, highly elastic, conductive silicone rubber, which adopts the following technical solution:

[0007] A tear-resistant high-elastic conductive silicone rubber, wherein the tear-resistant high-elastic conductive silicone rubber is made of the following raw materials in parts by weight:

[0008] Silicone rubber 80-120 parts

[0009] Conductive filler 30-50 parts

[0010] Chitosan 10-50 parts

[0011] 2-3 parts waterproofing agent

[0012] 4-8 parts of hydroxy silicone oil

[0013] Crosslinking agent 0.5-1 part

[0014] 1-2 parts of accelerator

[0015] Anti-aging agent 0.5-1 part

[0016] Each portion of the conductive filler is prepared by mixing carbon nanotubes and nanosilver in a weight ratio of (15-35):6.

[0017] By adopting the above technical scheme, the prepared tear-resistant high-elastic conductive silicone rubber can be stably attached to the surface of the fabric to form a conductive network structure with a thickness of 0.05-0.1mm, which greatly reduces the foreign body sensation. At the same time, it has good conductivity and can conduct microcurrent to various parts of the fabric, stimulate the skin, promote blood circulation, and achieve the effect of massage. The cured silicone rubber layer has good tear resistance, high elasticity, waterproofness, skin-friendliness and durability, and is used to replace silver paste circuits, which effectively solves the problems of poor tear resistance, elasticity and water resistance of silver paste circuits.

[0018] Silicone rubber has softness and elasticity, and is used to prepare conductive silicone rubber, which can improve the flexibility and elasticity of conductive silicone rubber. Fabrics are relatively thin, especially underwear, which is thinner. A silicone rubber layer is attached to its surface, which can easily cause the silicone layer to be damaged during folding or washing. During the experiment, it was found that silicone rubber attached to the surface of the fabric is prone to cracks, deformation and other problems after use, affecting product quality. In this regard, in this application, hydroxyl silicone oil is added. The hydroxyl groups in the hydroxyl silicone oil can combine with the silicone rubber molecular chain to form a cross-linked network, which effectively resists the erosion of external factors, reduces the problem of silicone rubber being easy to crack, fall off and deform, and can make silicone rubber have better durability and stability. At the same time, hydroxyl silicone oil can further improve the tear resistance and elasticity of silicone rubber.

[0019] In this application, carbon nanotubes and nanosilver are mixed in a specific ratio and then used together with silicone rubber, so that tear-resistant high-elastic conductive silicone rubber can conduct microcurrent and the conduction is stable. Nanosilver and carbon nanotubes are both conductive materials, but they have different conductivity. The two are used together to improve the conductivity of tear-resistant high-elastic conductive silicone rubber, so that it releases appropriate electrical stimulation and plays a massage role. Using carbon nanotubes alone will greatly improve the conductivity of tear-resistant high-elastic conductive silicone rubber, resulting in large electrical stimulation, which is not conducive to massage use; using nanosilver alone will result in small electrical stimulation and fail to achieve a massage effect.

[0020] Among them, carbon nanotubes not only play the role of conductivity, but also have good strength and toughness. They are used to prepare tear-resistant high-elastic conductive silicone rubber, which can improve the toughness and strength of the tear-resistant high-elastic conductive silicone rubber and increase the service life of the tear-resistant high-elastic conductive silicone rubber.

[0021] During long-term use, nanosilver will gradually oxidize and fall off over time, resulting in a decrease in conductivity. The addition of an anti-aging agent in this application can effectively reduce the oxidation and shedding of nanosilver and extend the service life of the tear-resistant, highly elastic conductive silicone rubber.

[0022] The torn high-elastic conductive silicone rubber of this application needs to come into direct contact with the skin, but silicone rubber has poor skin affinity. Chitosan has a high affinity to human skin, is safe, non-toxic, and has low irritation, and is not easy to cause irritation to the skin. In this application, chitosan is added and used together with silicone rubber to improve the skin affinity of silicone rubber and improve the comfort of using the torn high-elastic conductive silicone rubber.

[0023] The accelerator promotes the curing and molding of silicone rubber and improves the stability of silicone rubber adhering to the surface of the fabric.

[0024] The waterproofing agent can improve the waterproofing effect of the tear-resistant high-elastic conductive silicone rubber, so that the tear-resistant high-elastic conductive silicone rubber can be washed with water for many times without being damaged.

[0025] Preferably, the silicone rubber includes at least one of methyl vinyl silicone rubber, methyl ethyl silicone rubber, methyl phenyl silicone rubber and methyl phenyl vinyl silicone rubber.

[0026] Preferably, the conductive filler is pretreated, and the pretreatment steps are as follows:

[0027] The conductive filler and the solvent are heated to 40-50° C., stirred rapidly to form a suspension, and then a silane coupling agent is added, and stirring is continued for 1-2 hours. The mixture is filtered, and the filter residue is taken and dried to obtain a pretreated conductive filler.

[0028] The conductive fillers in this application are all nano-scale, which makes the dispersibility of the conductive fillers poor. During the mixing process, black spots or small lumps are easily formed, making the tear-resistant high-elastic conductive silicone rubber easy to break, and the power-on effect is poor or even no power. By first stirring the conductive filler and the solvent, the conductive filler is dispersed in the solvent, and then a silane coupling agent is added to react with the point filler, so that the surface of the conductive filler is silanized, and the conductive fillers will not agglomerate, and the dispersibility is improved. Mixed with silicone rubber, it can be evenly distributed in the silicone rubber system to form a tear-resistant high-elastic conductive silicone rubber with a uniform structure.

[0029] Preferably, the weight ratio of the conductive filler to the silane coupling agent is (15-20):6.

[0030] By adopting the above technical solution, the dosage of the conductive filler and the silane coupling agent is further optimized, and the reaction efficiency of the conductive filler and the silane coupling agent is further improved, thereby reducing the possibility of agglomeration of the conductive filler and improving the dispersibility of the conductive filler.

[0031] Preferably, the average particle size of the nanosilver is 25-50 nm, and the average diameter of the nanocarbon tubes is 2-20 nm.

[0032] By adopting the above technical solution, the average particle size of nanosilver and the diameter of nanocarbon tubes are optimized, so that the internal structure of the tear-resistant high-elastic conductive silicone rubber is compact and uniform, forming a stable microcurrent and improving the massage effect.

[0033] Preferably, the waterproofing agent includes at least one of polydimethylsiloxane, polymethyltriethoxysilane, polyether-modified polydimethylsiloxane, polyether-modified polymethyltriethoxysilane and polyether-modified vinyltriethoxysilane.

[0034] The above-mentioned waterproofing agent contains a large number of hydrogen bonds in its molecular structure. These hydrogen bonds can form very tight connections between silicone rubber molecules, thereby enhancing the waterproof effect and further improving the waterproof performance of the tear-resistant and highly elastic conductive silicone rubber, so that it can maintain good tear resistance and elasticity after multiple water-based tests. At the same time, it can also maintain the tear-resistant and highly elastic conductive silicone rubber to release low-frequency electricity and extend the service life of the release of low-frequency electrical stimulation.

[0035] Preferably, the viscosity of the hydroxy silicone oil at 25° C. is 2000-5000 mPa.s, and the degree of polymerization is 6-9.

[0036] By adopting the above technical solution, the parameters of hydroxy silicone oil are optimized, the bonding rate of hydroxyl groups in hydroxy silicone oil with silicone rubber molecular chains is further increased, and the problems of silicone rubber being prone to cracking, falling off and deformation are reduced.

[0037] Preferably, the accelerator comprises at least one of benzoyl peroxide, 2,5-dimethyl-2,5-di(benzoyl peroxide)hexane, tert-butyl peroxyisopropyl carbonate, 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane and diisopropylbenzene peroxide.

[0038] By adopting the above technical scheme, the cross-linking reaction of silicone rubber molecular chains is further promoted, the curing of silicone rubber is accelerated, and the linear molecules form a three-dimensional network structure, thereby improving the tear resistance of the tear-resistant high-elastic conductive silicone rubber and extending the service life of the tear-resistant high-elastic conductive silicone rubber.

[0039] Preferably, the antioxidant is N-phenyl-N'-isopropyl-p-phenylenediamine and / or 2-mercaptobenzimidazole.

[0040] Preferably, the antioxidant is obtained by mixing N-phenyl-N'-isopropyl-p-phenylenediamine and 2-mercaptobenzimidazole in a weight ratio of (4-6):3.

[0041] By adopting the above technical solution, the aging resistance of tear-resistant high-elastic conductive silicone rubber is improved, and the service life of tear-resistant high-elastic conductive silicone rubber is extended. Among them, N-phenyl-N'-isopropyl p-phenylenediamine and 2-mercaptobenzimidazole are both insoluble in water, so that the tear-resistant high-elastic conductive silicone rubber can still fully play its role after being subjected to water treatment, thereby extending the service life of the tear-resistant high-elastic conductive silicone rubber.

[0042] Preferably, the crosslinking agent is one of γ-aminopropyltriethoxysilane, bis(triethoxypropyl)silane tetrasulfide, vinyltriethoxysilane or γ-methacryloxypropyltrimethylsilane.

[0043] By using the above-mentioned silane coupling agent, a tight chemical bond can be formed with the silicone rubber, so that the tear-resistant high-elastic conductive silicone rubber has better bonding performance, improves the bonding stability between the silicone rubber and the fabric, and is not easy to fall off during use. At the same time, it can also improve the toughness and tensile strength of the silicone rubber, effectively preventing the tear-resistant high-elastic conductive silicone rubber from cracking or deforming during use.

[0044] In a second aspect, the present application provides a method for preparing tear-resistant, highly elastic, and conductive silicone rubber, using the following technical solution: A method for preparing tear-resistant, highly elastic, and conductive silicone rubber, comprising the following preparation steps:

[0045] S1, mixing silicone rubber and conductive filler to obtain a rubber mixture;

[0046] S2. The mixed rubber is then mixed with chitosan, a waterproofing agent, hydroxy silicone oil, a cross-linking agent, an accelerator and an antioxidant to obtain tear-resistant, highly elastic and conductive silicone rubber.

[0047] By adopting the above technical scheme, the silicone rubber and the conductive filler are first mixed evenly, which is beneficial to improve the conductivity of the tear-resistant and highly elastic conductive silicone rubber. Then the mixed rubber is mixed with chitosan, a waterproofing agent, a hydroxy silicone oil, a cross-linking agent, a accelerator, and has good tear resistance, high elasticity, waterproofness, skin affinity, conductivity and durability.

[0048] In a third aspect, the present application provides a fabric with a tear-resistant, highly elastic conductive silicone rubber circuit, which adopts the following technical solution:

[0049] A fabric with a tear-resistant high-elastic conductive silicone rubber circuit, comprising a fabric and a tear-resistant high-elastic conductive silicone rubber circuit connected to the surface of the fabric, wherein the tear-resistant high-elastic conductive silicone rubber circuit is provided with a contact connected to a power source;

[0050] The tear-resistant high-elastic conductive silicone rubber is the tear-resistant high-elastic conductive silicone rubber of the first aspect or the tear-resistant high-elastic conductive silicone rubber prepared according to the second aspect.

[0051] By adopting the above technical solution, the prepared fabric with tear-resistant and highly elastic conductive silicone rubber circuit will generate microcurrent after being connected to a power source, and transmit the microcurrent to various parts of the fabric, stimulating the skin, promoting blood circulation, and achieving a massage effect.

[0052] The preparation process of the fabric with tear-resistant and highly elastic conductive silicone rubber circuit is as follows:

[0053] The tear-resistant high-elastic conductive silicone rubber is coated on the fabric to form a circuit, and is vulcanized at a temperature of 50-60° C. for 5-10 minutes to obtain the fabric with the tear-resistant high-elastic conductive silicone rubber circuit.

[0054] In summary, this application has the following beneficial effects:

[0055] 1. The present application adopts silicone rubber, conductive filler, chitosan, waterproofing agent, hydroxyl silicone oil, cross-linking agent, accelerator and antioxidant together to form a tear-resistant and highly elastic conductive silicone rubber with good tear resistance, elasticity, waterproofness and skin-friendliness. The conductive filler is obtained by mixing carbon nanotubes and nanosilver in a specific ratio, which can greatly improve the conductivity of the silicone rubber. At the same time, the silicone rubber, waterproofing agent, hydroxyl silicone oil, cross-linking agent and accelerator are used together, so that the conductive silicone rubber is not prone to cracks, falling off and deformation during use, thereby greatly improving the service life of the conductive silicone rubber.

[0056] 2. The present application uses a silane coupling agent to pretreat the conductive filler, thereby improving the dispersibility of the conductive filler. When mixed with silicone rubber, the conductive filler can be evenly distributed in the silicone rubber system to form a tear-resistant, highly elastic, conductive silicone rubber with a uniform structure, thereby improving the tear resistance, elasticity, water resistance and conductivity of the tear-resistant, highly elastic, conductive silicone rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic diagram of the structure of the fabric with tear-resistant and highly elastic conductive silicone rubber circuit in Application Example 1.

[0058] Figure numerals: 1. fabric; 2. tear-resistant and highly elastic conductive silicone rubber circuit; 3. contact. DETAILED DESCRIPTION

[0059] The present application is further described in detail below with reference to the embodiments.

[0060] Example

[0061] Example 1

[0062] A tear-resistant, highly elastic and conductive silicone rubber is prepared by the following method:

[0063] S1, mixing 80 g of silicone rubber and 30 g of conductive filler to obtain a rubber mixture;

[0064] S2. The mixed rubber is then mixed with 10 g of chitosan, 2 g of a waterproofing agent (polydimethylsiloxane), 4 g of hydroxy silicone oil, 0.5 g of a crosslinking agent (γ-aminopropyltriethoxysilane), 1 g of an accelerator (benzoyl peroxide) and 0.5 g of an antioxidant (N-phenyl-N'-isopropyl-p-phenylenediamine) to obtain a tear-resistant, highly elastic conductive silicone rubber.

[0065] The silicone rubber is methyl vinyl silicone rubber, the molecular weight of the methyl vinyl silicone rubber is 100,000, and the vinyl content is 0.1%.

[0066] The conductive filler is prepared by mixing carbon nanotubes and silver nanotubes in a weight ratio of 15:6. The average particle size of the silver nanotubes is 25 nm, and the average diameter of the carbon nanotubes is 2 nm.

[0067] The viscosity of hydroxy silicone oil at 25°C is 2000mPa.s and the degree of polymerization is 6.

[0068] The number average molecular weight of chitosan is 50,000, and the degree of deacetylation is 85%.

[0069] The difference between Example 2-3 and Example 1 is that the types, amounts and experimental parameters of some raw materials for preparing tear-resistant high-elastic conductive silicone rubber are different. The specific differences are shown in Table 1:

[0070] Table 1 Types, amounts and experimental parameters of raw materials used to prepare tear-resistant, highly elastic and conductive silicone rubber in Examples 1-3

[0071]

[0072]

[0073] Example 4

[0074] A tear-resistant, highly elastic conductive silicone rubber. The difference between this embodiment and embodiment 1 is that the conductive filler needs to be pretreated. The pretreatment steps are as follows:

[0075] Heat 30 g of conductive filler and 500 ml of solvent (ethanol) to 40°C, stir rapidly to form a suspension, add 12 g of silane coupling agent (γ-aminopropyltriethoxysilane), continue stirring for 1 hour, filter, take the filter residue, and dry to obtain the pretreated conductive filler.

[0076] The weight ratio of the conductive filler to the silane coupling agent is 15:6.

[0077] Example 5

[0078] A tear-resistant, highly elastic conductive silicone rubber. The difference between this embodiment and embodiment 1 is that the conductive filler needs to be pretreated. The pretreatment steps are as follows:

[0079] Heat 30 g of conductive filler and 500 ml of solvent (ethanol) to 50°C, stir rapidly to form a suspension, add 9 g of silane coupling agent (bis(triethoxypropyl)silane tetrasulfide), continue stirring for 2 hours, filter, take the filter residue, and dry it to obtain the pretreated conductive filler.

[0080] The weight ratio of the conductive filler to the silane coupling agent is 20:6.

[0081] Example 6

[0082] A tear-resistant, highly elastic and conductive silicone rubber. The difference between this embodiment and embodiment 1 is that the silicone rubber is methylphenylvinyl silicone rubber, the molecular weight of the methylphenylvinyl silicone rubber is 400,000, the ethylene content is 0.1%, and the phenyl content is 5%. The remaining experimental raw material types, amounts and experimental parameters are consistent with those in embodiment 1.

[0083] Example 7

[0084] A tear-resistant, highly elastic conductive silicone rubber. The difference between this embodiment and embodiment 1 is that the antioxidant is 2-mercaptobenzimidazole, and the other experimental raw material types, dosages and experimental parameters are consistent with those of embodiment 1.

[0085] Example 8

[0086] A tear-resistant, highly elastic conductive silicone rubber. The difference between this embodiment and embodiment 1 is that the antioxidant is obtained by mixing N-phenyl-N'-isopropyl-p-phenylenediamine and 2-mercaptobenzimidazole in a weight ratio of 4:3, and the remaining experimental raw material types, amounts and experimental parameters are consistent with those in embodiment 1.

[0087] Example 9

[0088] A tear-resistant, highly elastic conductive silicone rubber. The difference between this embodiment and embodiment 1 is that the antioxidant is diacetylpropylenediamine, and the other experimental raw material types, dosages and experimental parameters are consistent with those in embodiment 1.

[0089] Comparative Example

[0090] Comparative Example 1

[0091] A conductive silicone rubber. The difference between this comparative example and Example 1 is that the conductive fillers are all carbon nanotubes, and the other experimental raw material types, amounts and experimental parameters are consistent with those of Example 1.

[0092] Comparative Example 2

[0093] A conductive silicone rubber. The difference between this comparative example and Example 1 is that the conductive fillers are all nanosilver, and the types, amounts and experimental parameters of other experimental raw materials are consistent with those of Example 1.

[0094] Comparative Example 3

[0095] A conductive silicone rubber. The difference between this comparative example and Example 1 is that hydrogen-containing silicone oil is used instead of hydroxy silicone oil, and the other experimental raw material types, amounts and experimental parameters are consistent with those of Example 1.

[0096] The viscosity at 25°C is 2000 mPa.s and the hydrogen content is 0.1%.

[0097] Comparative Example 4

[0098] A conductive silicone rubber. The difference between this comparative example and Example 1 is that talcum powder is used instead of chitosan of equal mass, and the other experimental raw material types, amounts and experimental parameters are consistent with those of Example 1.

[0099] Application Examples

[0100] Application Example 1

[0101] A fabric with tear-resistant, highly elastic conductive silicone rubber circuit, such as Figure 1 As shown, the fabric 1 and the tear-resistant high-elastic conductive silicone rubber circuit 2 connected to the surface of the fabric 1, the tear-resistant high-elastic conductive silicone rubber circuit 2 is provided with a contact 3 connected to a power source.

[0102] The fabric with a tear-resistant highly elastic conductive silicone rubber circuit is prepared by the following method: the tear-resistant highly elastic conductive silicone rubber prepared in Example 1 is coated on the fabric to form a circuit, and vulcanized at a temperature of 60° C. for 5 minutes to obtain the fabric with a tear-resistant highly elastic conductive silicone rubber circuit, wherein the thickness of the tear-resistant highly elastic conductive silicone rubber circuit after curing is 0.05 mm.

[0103] The difference between Application Example 2-13 and Application Example 1 is that the sources of the tear-resistant high-elastic conductive silicone rubber are different. The specific differences are shown in Table 2:

[0104] Table 2 Sources of tear-resistant, highly elastic and conductive silicone rubber in application examples 1-13

[0105] Application Examples source Application Example 1 Example 1 Application Example 2 Example 2 Application Example 3 Example 3 Application Example 4 Example 4 Application Example 5 Example 5 Application Example 6 Example 6 Application Example 7 Example 7 Application Example 8 Example 8 Application Example 9 Example 9 Application Example 10 Comparative Example 1 Application Example 11 Comparative Example 2 Application Example 12 Comparative Example 3 Application Example 13 Comparative Example 4

[0106] The performance testing corresponds to the tear resistance test, high elasticity test, crack, deformation or shedding deformation test, microcurrent test and skin-friendliness test of the tear-resistant high-elastic conductive silicone rubber circuit fabric obtained in Example 1-13.

[0107] Detection method / test method

[0108] Tear resistance test: Pull the tear-resistant high-elastic conductive silicone rubber circuit fabric along the length direction until the tear-resistant high-elastic conductive silicone rubber breaks, and record the length of the tear-resistant high-elastic conductive silicone rubber when it breaks. The longer the length, the better the tear resistance.

[0109] High elasticity test: pull the tear-resistant high-elastic conductive silicone rubber circuit fabric to 150% of the original fabric length, fix it, let it stand for 12 hours, test the length of the tear-resistant high-elastic conductive silicone rubber, and calculate the change rate of the length of the tear-resistant high-elastic conductive silicone rubber. The smaller the change rate, the better the elasticity.

[0110] Crack, deformation or shedding deformation test: Put all the tear-resistant high-elastic conductive silicone rubber circuit fabrics in the washing machine, stir for 6 hours, take them out, and observe whether the conductive silicone rubber has cracks or deformation.

[0111] Micro-current test: Use a 240mAh polymer battery as the power source, and then connect the power source to the tear-resistant and highly elastic conductive silicone rubber circuit fabric to test the current. After the crack, deformation or shedding deformation test, measure the current again.

[0112] Skin-friendly test: 600 people were selected, including 200 people aged 10-20, 200 people aged 20-40, and 200 people aged 40-60, and they were asked to touch the tear-resistant and highly elastic conductive silicone rubber circuit fabrics prepared in Application Examples 1-13, and the number of people who thought the skin-friendly fabrics were good was recorded. The experimental data is shown in Table 3:

[0113] Table 3 Experimental data of application examples 1-13

[0114]

[0115]

[0116] It can be seen from Application Examples 1-13 and Table 2 that the tear-resistant high-elastic conductive silicone rubber prepared by the technical solution of the present application has good tear resistance, elasticity, softness, water resistance, skin-friendliness and conductivity, and is used to prepare tear-resistant high-elastic conductive silicone rubber circuit fabrics, which can improve the service life of the tear-resistant high-elastic conductive silicone rubber circuit fabrics.

[0117] Comparing Application Example 1 with Application Example 9, the current in Application Example 9 is large, and the data of the tear resistance test and the high elasticity test are better. However, deformation occurs in the crack, deformation or shedding deformation test, and the current is significantly reduced after the crack, deformation or shedding deformation test. It can be seen that using carbon nanotubes alone to prepare tear-resistant and highly elastic conductive silicone rubber will affect the use of the circuit.

[0118] Comparing Application Example 1 with Application Example 10, the tear resistance test, high elasticity test and current data in Application Example 10 are not as good as those in Application Example 1, and cracks appear in the crack, deformation or shedding deformation test. It can be seen that using carbon nanotubes alone to prepare tear-resistant high-elastic conductive silicone rubber will affect the use of the circuit and reduce water resistance.

[0119] Comparing Application Example 1 with Application Example 11, the tear resistance test, high elasticity test and current data in Application Example 11 are not as good as those in Application Example 1, and the product falls off in the crack, deformation or shedding deformation test, and is not electrified. The number of people who think it is skin-friendly is relatively small. It can be seen that by adding hydroxyl silicone oil to prepare tear-resistant high-elastic conductive silicone rubber, the tear resistance, elasticity, water resistance, skin-friendliness and conductivity of the tear-resistant high-elastic conductive silicone rubber can be further improved.

[0120] Comparing Application Example 1 with Application Example 12, the tear resistance test, high elasticity test and current data in Application Example 12 are not as good as those in Application Example 1, and cracking occurs in the crack, deformation or shedding deformation test. The number of people who think that the skin-friendliness is good in the skin-friendliness test is greatly reduced, indicating that adding chitosan tear-resistant high-elastic conductive silicone rubber can further improve the tear resistance, elasticity, water resistance, skin-friendliness and conductivity of the tear-resistant high-elastic conductive silicone rubber.

[0121] Comparing Application Example 1 with Application Examples 4-5, the tear resistance and elasticity properties in Application Examples 4-5 are improved, and the current change rate is reduced after crack, deformation or shedding deformation tests, indicating that pretreatment of the conductive filler can further improve the tear resistance, elasticity, water resistance and conductivity of the tear-resistant high-elastic conductive silicone rubber.

[0122] Comparing Application Example 1 with Application Examples 7-8, in Application Example 8, the current basically did not change after the crack, deformation or shedding deformation test, indicating that the water resistance of the tear-resistant high-elastic conductive silicone rubber can be further improved by mixing N-phenyl-N'-isopropyl-p-phenylenediamine and 2-mercaptobenzimidazole in a specific proportion.

[0123] Comparing Application Example 1 with Application Example 9, the current in Application Example 9 dropped significantly after the crack, deformation or shedding deformation test, indicating that the use of N-phenyl-N'-isopropyl-p-phenylenediamine or 2-mercaptobenzimidazole as an antioxidant can further improve the water resistance of the tear-resistant high-elastic conductive silicone rubber.

[0124] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A tear-resistant, highly elastic conductive silicone rubber, characterized in that: The tear-resistant high-elastic conductive silicone rubber is made of the following raw materials in parts by weight: Silicone rubber 80-120 parts Conductive filler 30-50 parts Chitosan 10-50 parts 2-3 parts waterproofing agent 4-8 parts of hydroxy silicone oil Crosslinking agent 0.5-1 part 1-2 parts of accelerator Anti-aging agent 0.5-1 part Each portion of the conductive filler is prepared by mixing carbon nanotubes and nanosilver in a weight ratio of (15-35):6; The conductive filler is pretreated, and the pretreatment steps are as follows: The conductive filler and the solvent are heated to 40-50°C, stirred rapidly to form a suspension, and then a silane coupling agent is added, and stirring is continued for 1-2 hours, and the mixture is filtered, and the filter residue is taken and dried to obtain a pretreated conductive filler; The weight ratio of the conductive filler to the silane coupling agent is (15-20):6; The average particle size of the nanosilver is 25-50 nm, and the average diameter of the nanocarbon tube is 2-20 nm; The waterproofing agent comprises at least one of polydimethylsiloxane, polymethyltriethoxysilane, polyether-modified polydimethylsiloxane, polyether-modified polymethyltriethoxysilane and polyether-modified vinyltriethoxysilane; The viscosity of the hydroxy silicone oil at 25°C is 2000-5000 mPa.s, and the degree of polymerization is 6-9; The accelerator comprises at least one of benzoyl peroxide, 2,5-dimethyl-2,5-di(benzoyl peroxide)hexane, tert-butyl peroxyisopropyl carbonate, 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane and diisopropylbenzene peroxide; The crosslinking agent is one of γ-aminopropyltriethoxysilane, bis(triethoxypropyl)silane tetrasulfide, vinyltriethoxysilane or γ-methacryloxypropyltrimethylsilane; The antioxidant is N-phenyl-N'-isopropyl-p-phenylenediamine and / or 2-mercaptobenzimidazole.

2. A method for preparing the tear-resistant, highly elastic and conductive silicone rubber according to claim 1, characterized in that: The following steps are involved: S1, mixing silicone rubber and conductive filler to obtain a rubber mixture; S2. The mixed rubber is then mixed with chitosan, a waterproofing agent, hydroxy silicone oil, a cross-linking agent, an accelerator and an antioxidant to obtain tear-resistant, highly elastic and conductive silicone rubber.

3. A fabric with a tear-resistant, highly elastic conductive silicone rubber circuit, characterized in that: It comprises a fabric (1) and a tear-resistant, highly elastic, conductive silicone rubber circuit (2) connected to the surface of the fabric (1), wherein the tear-resistant, highly elastic, conductive silicone rubber circuit (2) is provided with a contact (3) connected to a power source; The tear-resistant highly elastic conductive silicone rubber is the tear-resistant highly elastic conductive silicone rubber according to claim 1 or the tear-resistant highly elastic conductive silicone rubber prepared according to claim 2.

Images