High-wear-resistance nitrile rubber compound and preparation method thereof

Abstract

The invention relates to a special rubber technology, and more specifically relates to a highly wear-resistant nitrile rubber compound and a preparation method thereof, the highly wear-resistant nitrile rubber compound comprises 100 parts of nitrile rubber; 2-5 parts of a liquid rubber compatibilizer; 30 to 50 parts of a reinforcing agent; 2-4 parts of a vulcanizing agent; 1-3 parts of a cross-linking agent; 3-5 parts of an active agent; 2-4 parts of an anti-aging agent; the preparation method comprises the following steps: sequentially adding the liquid rubber compatibilizer, the reinforcing agent, the active agent, the anti-aging agent and the anti-friction agent into the nitrile rubber, mixing, adding the vulcanizing agent and the cross-linking agent through mixing by an open mill, discharging rubber, naturally cooling, vulcanizing by a mold pressing vulcanizing machine, performing two-stage vulcanization in a blast drying oven, and finally performing extrusion molding to obtain the rubber. The high-wear-resistance nitrile rubber compound disclosed by the invention has the advantages of good processability, excellent mechanical properties, low friction coefficient, outstanding wear resistance and the like, meets the application requirements of high rotating speed and high torque of a power motor of a new energy automobile, and ensures the use stability, the safety and the service life.

Description

Technical Field

[0001] The invention relates to special rubber technology, in particular to a highly wear-resistant nitrile rubber compound and a preparation method thereof. Background Art

[0002] Nitrile rubber seals are a type of sealing element, mainly made of nitrile rubber, which is a synthetic rubber with oil resistance, heat resistance and wear resistance. They are widely used in hydraulic systems, automotive power systems, petrochemical equipment, aerospace and other fields to prevent leakage of fluids or gases. Nitrile rubber seals are an indispensable key material for high-end hydraulic equipment and automotive power sealing systems.

[0003] In recent years, as automobile manufacturing has developed towards electrification, intelligence and high safety, especially the high speed of power motors used in new energy vehicles, sealing products have to withstand large friction torque. In the case of insufficient lubrication, the heat generated in the sealing area is large, which will cause the rubber to become sticky or severely bonded to the metal, reduce the wear resistance, damage the seal, and then lead to seal failure. Once the seal fails, it will not only cause equipment damage, but also cause serious casualties and property losses.

[0004] Therefore, higher requirements are placed on the wear resistance and mechanical properties of nitrile rubber. Summary of the invention

[0005] In order to improve the wear resistance and mechanical properties of nitrile rubber, the present application provides a highly wear-resistant nitrile rubber compound and a preparation method thereof.

[0006] In the first aspect, the present invention provides a highly wear-resistant nitrile rubber compound, which adopts the following technical solution:

[0007] A highly wear-resistant nitrile rubber compound, comprising the following raw materials in parts by weight:

[0008] Nitrile rubber: 100 parts;

[0009] Liquid rubber extender: 2-5 parts;

[0010] Reinforcing agent: 30-50 parts;

[0011] Vulcanizing agent: 2-4 parts;

[0012] Cross-linking agent: 1-3 parts;

[0013] Active agent: 3-5 parts;

[0014] Anti-aging agent: 2-4 parts;

[0015] Friction reducer: 10-20 parts.

[0016] As a preferred technical solution of the present invention, the mass fraction of acrylonitrile units in the nitrile rubber is 15-40%, the mole fraction of residual carbon-carbon double bonds is 0.5-5%, and the Mooney viscosity is 45-80.

[0017] As a preferred technical solution of the present invention, the reactive liquid rubber compatibilizer is at least one of carboxyl liquid nitrile rubber, hydroxyl-terminated liquid polybutadiene rubber and hydroxyl-terminated polyisoprene liquid rubber.

[0018] As a preferred technical solution of the present invention, the reinforcing agent is at least one of highly wear-resistant carbon black, white carbon black, nano titanium dioxide and rare earth lanthanum compounds.

[0019] As a preferred technical solution of the present invention, the vulcanizing agent is at least one of dicumyl peroxide, di-tert-butyl cumyl peroxide, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, and triallyl isocyanurate.

[0020] As a preferred technical solution of the present invention, the cross-linking agent is at least one of trimethylolpropane trimethacrylate and ferrous sulfate.

[0021] As a preferred technical solution of the present invention, the active agent is at least one of N,N'-m-phenylene bismaleimide, zinc oxide and zinc stearate.

[0022] As a preferred technical solution of the present invention, the antioxidant is at least one of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 4,4'-di(α,α-dimethyl)aniline, and 2-mercaptobenzimidazole zinc salt.

[0023] As a preferred technical solution of the present invention, the friction reducing agent is at least one of multi-walled carbon nanotubes, graphene oxide, layered nano zirconium phosphate, and polytetrafluoroethylene powder surface-treated with oxygen plasma.

[0024] In a second aspect, the present invention provides a method for preparing a highly wear-resistant nitrile rubber compound, which adopts the following technical scheme:

[0025] A method for preparing the highly wear-resistant nitrile rubber compound comprises the following steps:

[0026] S1. During mixing, an XK160 double-roll open mill is used, the roller distance is adjusted to 1.0 to 2.5 mm, and the liquid rubber compatibilizer, reinforcing agent, activator, antioxidant, anti-friction agent, etc. are pre-added to the plasticized nitrile rubber rubber in sequence, and the mixing operation is performed, the temperature is controlled at 45 to 65° C., and the mixing time is 8 to 12 minutes to obtain a nitrile rubber compound;

[0027] S2. Add the vulcanizing agent and the crosslinking agent to the nitrile rubber mix in S1, mix for 4 to 6 minutes on an open mill, adjust the roller distance to 0.5 mm, pass through 2 to 3 times, and cool the rubber sheet naturally;

[0028] S3. Use a compression vulcanizer to vulcanize the rubber in S2 for 5 to 10 minutes at a temperature of 160 to 170°C and a pressure of 10 to 20 MPa, and then perform a second-stage vulcanization in a blast oven at 150°C for 3 to 4 hours to obtain a highly wear-resistant nitrile rubber compound.

[0029] The beneficial effects of the present invention are:

[0030] (1) The high wear-resistant nitrile rubber compound provided by the present invention has the advantages of good processing performance, excellent mechanical properties, low friction coefficient, outstanding wear resistance, etc., which can meet the application requirements of high speed and high torque of new energy vehicle power motors, improve their service life, and improve the stability, safety and service life of new energy vehicle power motors.

[0031] (2) The high wear-resistant nitrile rubber compound provided by the present invention contains nano-friction reducers such as multi-walled carbon nanotubes, graphene oxide and layered nano zirconium phosphate that have been surface-treated with oxygen plasma, which can not only reduce the friction coefficient of the rubber material, but also have a good nano-enhancement effect on the rubber matrix. At the same time, its nano-layered structure can effectively inhibit the transmission of hot oxygen gas in the rubber matrix, further improving its antioxidant performance.

[0032] (3) The high wear-resistant nitrile rubber compound provided by the present invention does not contain small molecule compatibilizers, coupling agents and plasticizers, but adopts a reactive liquid rubber compatibilizer. By surface treating or volume-enhancing and modifying the three base materials, the purpose of reducing surface tension and improving the compatibility between the three and the inorganic filler is achieved. The problem of degradation or migration loss of small molecule compatibilizers or coupling agents in nitrile rubber compounding due to high temperature friction, physical extrusion or oil absorption is effectively overcome, resulting in a decrease in the activity or concentration of the compatibilizer or coupling agent, thereby failing to effectively maintain the compatibility between the rubber and the filler. At the same time, the liquid rubber compatibilizer has a good plasticizing effect, which can prevent the nitrile rubber from hardening at low temperatures, and effectively improve the service performance of the nitrile rubber in low temperature environments. DETAILED DESCRIPTION

[0033] This section will describe the specific embodiments of the present application in detail. Unless otherwise defined, the technical terms and scientific terms used in this application are the same as those generally understood by those skilled in the art. The terms used in this application are only for describing specific embodiments, not for limiting this application. It should be understood that when used in this specification and the appended claims, the terms "include" and "comprise" indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0034] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with embodiments.

[0035] Example 1

[0036] A method for preparing a highly wear-resistant nitrile rubber compound, calculated by weight, comprises the following steps:

[0037] S1. The rubber mixing process adopts XK160 double-roll open mill, the roller distance of plasticizing process is 0.5mm, the plasticizing process is 3min, and the roller temperature is 45℃; during mixing, the roller distance is adjusted to 1.5mm, 100 parts of nitrile rubber (the mass fraction of acrylonitrile unit is 15%, the mole fraction of residual carbon-carbon double bonds is 1.5%, and the Mooney viscosity [ML(1+4)100℃] is 45), 3 parts of carboxyl liquid nitrile rubber, 40 parts of high wear-resistant carbon black, 2 parts of rare earth lanthanum compound, 2 parts of N,N'-m-phenylene bismaleimide, 2 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 4 parts of polytetrafluoroethylene powder, and 15 parts of multi-walled carbon nanotubes treated with oxygen plasma are pre-added to the plasticized nitrile rubber in sequence, and mixing operation is carried out; the temperature is controlled at 45℃, and the mixing time is 8-10min to obtain the nitrile rubber compound;

[0038] S2. 2 parts of di-tert-butyl peroxide isopropyl benzene and 1.5 parts of trimethylolpropane trimethacrylate were added to the rubber mix described in Z2, and mixed by an open mill for 4 min, the roller spacing was adjusted to 0.5 mm, and the thin pass was passed 3 times, and the rubber was cooled naturally under the sheet;

[0039] S3. Use a compression vulcanizer to vulcanize for 5 minutes at a temperature of 160°C and a pressure of 10 MPa, and then perform a second-stage vulcanization in a blast oven at 150°C for 3.5 hours to obtain a highly wear-resistant nitrile rubber compound.

[0040] Example 2

[0041] A method for preparing a highly wear-resistant nitrile rubber compound, calculated by weight, comprises the following steps:

[0042] S1. The rubber mixing process adopts XK160 double-roll open mill, the roller distance of plastication is 0.5mm, the plastication is 4min, and the roller temperature is 50℃; during mixing, the roller distance is adjusted to 1.5mm, 100 parts of nitrile rubber (the mass fraction of acrylonitrile unit is 25%, the mole fraction of residual carbon-carbon double bonds is 3.0%, and the Mooney viscosity [ML(1+4)100℃] is 60), 3 parts of hydroxyl-terminated liquid polybutadiene rubber, 1 part of hydroxyl-terminated polyisoprene liquid rubber, 40 parts of high wear-resistant carbon black, 5 parts of nano titanium dioxide, 3 parts of zinc oxide, 2 parts of 4,4'-di(α,α-dimethyl)aniline, 15 parts of graphene oxide treated with oxygen plasma, and 5 parts of layered nano zirconium phosphate are pre-added to the plasticated nitrile rubber in sequence, and mixing is performed; the temperature is controlled at 50℃, and the mixing time is 8-10min to obtain a nitrile rubber compound;

[0043] S2. 4 parts of dicumyl peroxide and 3 parts of ferrous sulfate were added to the rubber mix described in Z2, and mixed by an open mill for 5 min, the roller spacing was adjusted to 0.5 mm, passed through 2 times, and the rubber was cooled naturally under the sheet;

[0044] S3. Use a compression vulcanizer to vulcanize for 10 minutes at a temperature of 165°C and a pressure of 15 MPa, and then perform a second-stage vulcanization in a blast oven at 150°C for 4 hours to obtain a highly wear-resistant nitrile rubber compound.

[0045] Example 3

[0046] A method for preparing a highly wear-resistant nitrile rubber compound, calculated by weight, comprises the following steps:

[0047] S1. The rubber mixing process adopts XK160 double-roll open mill, the roller distance of plastication is 0.5mm, the plastication is 3min, and the roller temperature is 55°C; during mixing, the roller distance is adjusted to 1.5mm, 100 parts of nitrile rubber (the mass fraction of acrylonitrile unit is 35%, the mole fraction of residual carbon-carbon double bonds is 3.5%, and the Mooney viscosity [ML(1+4)100°C] is 75), 3 parts of carboxyl liquid nitrile rubber, 2 parts of hydroxyl-terminated liquid polybutadiene rubber, 40 parts of white carbon black, 10 parts of nano titanium dioxide, 5 parts of zinc stearate, 2 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 2 parts of 2-mercaptobenzimidazole zinc salt, 5 parts of polytetrafluoroethylene powder, and 5 parts of multi-walled carbon nanotubes treated with oxygen plasma are pre-added to the plasticized nitrile rubber in sequence, and mixing is performed; the temperature is controlled at 55°C, and the mixing time is 10 to 12min to obtain a nitrile rubber compound;

[0048] S2 4 parts of triallyl isocyanurate, 1.5 parts of trimethylolpropane trimethacrylate and 1 part of ferrous sulfate were added to the rubber mix described in Z2, and mixed by an open mill for 5min, the roller spacing was adjusted to 0.5mm, passed 3 times, and the rubber was cooled naturally under the sheet;

[0049] S3. Use a compression vulcanizer to vulcanize for 8 minutes at a temperature of 170°C and a pressure of 20 MPa, and then perform a second-stage vulcanization in a blast oven at 150°C for 4 hours to obtain a highly wear-resistant nitrile rubber compound.

[0050] Example 4

[0051] A method for preparing a highly wear-resistant nitrile rubber compound, calculated by weight, comprises the following steps:

[0052] S1. The rubber mixing process adopts XK160 double-roll open mill, the roller distance of plastication is 0.5mm, the plastication is 4min, and the roller temperature is 65℃; during mixing, the roller distance is adjusted to 1.5mm, 100 parts of nitrile rubber (the mass fraction of acrylonitrile unit is 40%, the mole fraction of residual carbon-carbon double bonds is 3%, and the Mooney viscosity [ML(1+4)100℃] is 80), 5 parts of hydroxyl-terminated liquid polybutadiene rubber, 40 parts of nano-titanium dioxide, 2 parts of rare earth lanthanum compound, 3 parts of zinc oxide, 2 parts of zinc stearate, 2 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 1 part of 2-mercaptobenzimidazole zinc salt, 10 parts of multi-walled carbon nanotubes treated with oxygen plasma and 5 parts of layered nano-zirconium phosphate are pre-added to the plasticated nitrile rubber in sequence, and mixing operation is carried out; the temperature is controlled at 65℃, and the mixing time is 12-15min to obtain a nitrile rubber compound;

[0053] S2. 3 parts of dicumyl peroxide and 3 parts of ferrous sulfate were added to the rubber mix described in Z2, and mixed by an open mill for 6 min, the roller spacing was adjusted to 0.5 mm, passed 3 times, and the rubber was cooled naturally under the sheet;

[0054] S3. Use a compression vulcanizer to vulcanize for 10 minutes at a temperature of 165°C and a pressure of 20 MPa, and then perform a second-stage vulcanization in a blast oven at 150°C for 4 hours to obtain a highly wear-resistant nitrile rubber compound.

[0055] Example 5

[0056] A method for preparing a highly wear-resistant nitrile rubber compound, calculated by weight, comprises the following steps:

[0057] S1. The rubber mixing process adopts XK160 double-roll open mill, the roller distance of plasticizing process is 0.5mm, plasticizing for 3min, and the roller temperature is 50℃; during mixing, the roller distance is adjusted to 1.5mm, 100 parts of nitrile rubber (the mass fraction of acrylonitrile unit is 30%, the molar fraction of residual carbon-carbon double bonds is 2.8%, and the Mooney viscosity [ML(1+4)100℃] is 65), 2 parts of carboxyl liquid nitrile rubber, 3 parts of terminal hydroxyl polyisoprene liquid rubber, 20 parts of high wear-resistant carbon black, 20 parts of nano titanium dioxide, 5 parts of rare earth lanthanum compounds, 2 parts of N,N'-m-phenylene bismaleimide, 1 part of zinc oxide, 2 parts of 4,4'-bis(α,α-dimethyl)aniline, 2 parts of 2-mercaptobenzimidazole zinc salt, 10 parts of multi-walled carbon nanotubes treated with oxygen plasma, 5 parts of graphene oxide and 5 parts of polytetrafluoroethylene powder are sequentially added into the plasticized nitrile rubber in advance, and a mixing operation is performed; the temperature is controlled at 50°C and the mixing time is 13 minutes to obtain a nitrile rubber compound;

[0058] S2 3 parts of triallyl isocyanurate and 3 parts of trimethylolpropane trimethacrylate were added to the rubber mix Z2, mixed by an open mill for 6min, the roller spacing was adjusted to 0.5mm, thin through 2 times, the rubber sheet was cooled naturally under the sheet;

[0059] S3. Use a compression vulcanizer to vulcanize for 8 minutes at a temperature of 170°C and a pressure of 15 MPa, and then perform a second-stage vulcanization in a blast oven at 150°C for 3 hours to obtain a highly wear-resistant nitrile rubber compound.

[0060] Comparative Example 1

[0061] No friction-reducing filler was added, and the rest of the formulation and operation were the same as in Example 1.

[0062] Comparative Example 2

[0063] No reactive liquid rubber compatibilizer was added, and the remaining formulations and operations were the same as those in Example 2.

[0064] Comparative Example 3

[0065] The added multi-walled carbon nanotubes treated with oxygen plasma were replaced with multi-walled carbon nanotubes not treated with oxygen plasma. The rest of the formula and operation were referred to Example 3.

[0066] Comparative Example 4

[0067] Without adding layered nano zirconium phosphate, the rest of the formula and operation refer to Example 4.

[0068] Comparative Example 5

[0069] No rare earth lanthanum compound was added, and the remaining formula and operation were the same as in Example 4.

[0070] Comparative Example 6

[0071] No hydroxyl-terminated polyisoprene liquid rubber was added, and the remaining formulations and operations were the same as those in Example 5.

[0072] Performance Testing

[0073] The performance of Examples 1 to 5 and Comparative Examples 1 to 6 was tested according to the following standards, and the results are shown in Table 1:

[0074] 1. The tensile strength and elongation at break of the sample before the high temperature resistance test: refer to "GB / T528-2009 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber", and the tensile rate is 500mm / min" for testing;

[0075] 2. Hardness of the sample before high temperature resistance test / Shore A: Tested in accordance with "GB / T531.1-2008 Test method for indentation hardness of vulcanized rubber or thermoplastic rubber Part 1: Shore hardness tester method (Shore hardness)";

[0076] 3. Changes in tensile strength, elongation at break and hardness after high temperature resistance test (125°C × 70h): Tested in accordance with "GB / T3512-2014 Hot air accelerated aging and heat resistance test for vulcanized rubber or thermoplastic rubber";

[0077] 4. Compression set (125℃×70h): Tested in accordance with "GB / T7759.1-2015 Determination of compression set of vulcanized rubber or thermoplastic rubber Part 1: At room temperature and high temperature conditions";

[0078] 5. Oil resistance test (125℃×70h): refer to "GB / T1690-2010 Test method for liquid resistance of vulcanized rubber or thermoplastic rubber" for testing;

[0079] 6. Low temperature brittleness temperature (-42°C): Tested in accordance with "GB / T15256-2014 Determination of low temperature brittleness of vulcanized rubber or thermoplastic rubber";

[0080] 7. Akron abrasion test: Test according to "GB / T1689-2014 Determination of wear resistance of vulcanized rubber (using Akron abrasion tester)".

[0081] Table 1 Performance test results

[0082]

[0083]

[0084] It can be seen from Table 1 that before the high temperature resistance test (125°C×70h), the high wear-resistant nitrile rubber compounds prepared in Examples 1 to 5 and the nitrile rubber compounds prepared in Comparative Examples 2 and 6 all exhibited excellent mechanical properties, indicating that fillers such as high wear-resistant carbon black, white carbon black, nano-titanium dioxide or rare earth lanthanum compounds all have good reinforcing effects.

[0085] After a high temperature test at 125°C for 70h, the high wear-resistant nitrile rubber mixes prepared in Examples 1 to 5 exhibited better mechanical properties and oil resistance than those in Comparative Example 4, and still met the performance requirements of the seal. The reason is that the addition of micro-nano anti-friction fillers such as layered nano zirconium phosphate can not only reduce the friction coefficient of the nitrile rubber mix, but also have a good nano-enhancement effect on the rubber matrix, and at the same time, its nano-layered structure can effectively inhibit the transmission of hot oxygen gas in the nitrile rubber matrix.

[0086] The highly wear-resistant nitrile rubber compound prepared in Examples 1 to 5 has excellent low-temperature resistance. By adding a reactive liquid rubber extender, the lubrication effect between rubber molecular chains is increased, which can prevent the nitrile rubber from hardening at low temperatures. The service performance of the nitrile rubber in a low-temperature environment can be effectively improved, and the low-temperature brittle temperature of the nitrile rubber compound is lower than -42°C.

[0087] The highly wear-resistant nitrile rubber compounds prepared in Examples 1 to 5 have outstanding high temperature resistance, oil resistance, and low compression permanent deformation properties, and can be used in the sealing of high-end hydraulic equipment and new energy vehicle power systems.

[0088] The highly wear-resistant nitrile rubber compounds prepared in Examples 1 to 5 have outstanding wear resistance, with Akron abrasion ≤0.13cm3 / 1.61km, which is only about one-third of the nitrile rubber compounds prepared in Comparative Examples 1 to 6. This is because the selected friction-reducing fillers and reactive liquid rubber extenders have a good dispersion enhancement effect, reducing the friction coefficient of the nitrile rubber and improving the wear resistance.

[0089] The test results of Comparative Examples 1 to 6 are not as good as those of Examples 1 to 5. The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and these modifications or substitutions should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A highly wear-resistant nitrile rubber compound, characterized in that: The invention comprises the following raw materials in parts by weight: Nitrile rubber: 100 parts; Liquid rubber extender: 2-5 parts; Reinforcing agent: 30-50 parts; Vulcanizing agent: 2-4 parts; Cross-linking agent: 1-3 parts; Active agent: 3-5 parts; Anti-aging agent: 2-4 parts; Friction reducer: 10-20 parts.

2. A highly wear-resistant nitrile rubber compound according to claim 1, characterized in that: The mass fraction of the acrylonitrile unit of the nitrile rubber is 15-40%, the mole fraction of the residual carbon-carbon double bonds is 0.5-5%, and the Mooney viscosity is 45-80.

3. A highly wear-resistant nitrile rubber compound according to claim 1, characterized in that: The liquid rubber compatibilizer is one or more of carboxyl-containing liquid nitrile rubber, hydroxyl-terminated liquid polybutadiene rubber, and hydroxyl-terminated polyisoprene liquid rubber.

4. A highly wear-resistant nitrile rubber compound according to claim 1, characterized in that: The reinforcing agent is one or more of highly wear-resistant carbon black, white carbon black, nano titanium dioxide, and rare earth lanthanum compounds.

5. A highly wear-resistant nitrile rubber compound according to claim 1, characterized in that: The vulcanizing agent is one or more of dicumyl peroxide, di-tert-butylcumyl peroxide, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, and triallyl isocyanurate.

6. A highly wear-resistant nitrile rubber compound according to claim 1, characterized in that: The crosslinking agent is trimethylolpropane trimethacrylate and / or ferrous sulfate.

7. A highly wear-resistant nitrile rubber compound according to claim 1, characterized in that: The active agent is one or more of N,N'-m-phenylene bismaleimide, zinc oxide and zinc stearate.

8. The highly wear-resistant nitrile rubber compound according to claim 1, characterized in that: The antioxidant is one or more of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 4,4'-di(α,α-dimethyl)aniline, and 2-mercaptobenzimidazole zinc salt.

9. A highly wear-resistant nitrile rubber compound according to claim 1, characterized in that: The friction reducing agent is one or more of multi-walled carbon nanotubes, graphene oxide, layered nano zirconium phosphate, and polytetrafluoroethylene powder that have been surface treated with oxygen plasma.

10. A method for preparing the highly wear-resistant nitrile rubber compound according to any one of claims 1 to 9, characterized in that: The preparation of the rubber compound comprises the following steps: S1. Preparation of nitrile rubber compound: adding liquid rubber compatibilizer, reinforcing agent, activator, antioxidant and anti-friction agent to nitrile rubber in sequence, performing mixing operation, controlling the temperature to 45-65°C, mixing time to 8-12min, and obtaining nitrile rubber compound; S2. Preparation of rubber: adding a vulcanizing agent and a crosslinking agent to the nitrile rubber mix in S1, mixing by an open mill for 4 to 6 minutes, adjusting the roller distance to 0.5 mm, passing through 2 to 3 times, and cooling the rubber sheet naturally to obtain a rubber; S3. Preparation of highly wear-resistant nitrile rubber compound: vulcanize the rubber in S2 for 5 to 10 minutes using a compression vulcanizer at a temperature of 160 to 170°C and a pressure of 10 to 20 MPa, and then perform a second-stage vulcanization in a 150°C blast oven for 3 to 4 hours to obtain a highly wear-resistant nitrile rubber compound.

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