Stainless steel wire general wringing roller composite material and preparation method thereof

Abstract

The invention discloses a universal wringing roller composite material for stainless steel wires and a preparation method, and the universal wringing roller composite material is prepared from the following raw materials in parts by weight: hydrogenated butadiene-acrylonitrile rubber, fluororubber, acrylate rubber, carbon fibers, graphene oxide, alumina microspheres, a cross-linking agent, an anti-aging agent and a reinforcing agent. The hydrogenated butadiene-acrylonitrile rubber, the fluororubber and the acrylate rubber form a composite rubber body with an interpenetrating network structure, and the composite rubber body comprises a heat conduction structure. The first rubber network is firstly generated, then the second rubber network and the third rubber network are sequentially interpenetrated, so that interpenetrated interpenetrating networks are formed in the composite material, the oil resistance, acid resistance and tensile strength of the rubber composite material are improved, the heat conduction coefficient of the composite material is improved by adding the heat conduction framework and forming an ordered heat conduction structure, and the service life of the composite material is prolonged. The cracking phenomenon caused by thermal stress concentration of the wringing roller is avoided, and the service life of the wringing roller is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rubber squeeze dry roller, in particular to a stainless steel wire general squeeze dry roller composite material and a preparation method. BACKGROUND

[0002] The squeeze dry roller is a cylindrical roller body formed by a metal or alloy material as a roller core and a vulcanized rubber sleeve outside. In the production process of stainless steel plates, the production process of first removing oil and then pickling is adopted. Therefore, the squeeze dry roller needs to have good oil and acid resistance to ensure that the squeeze dry roller can be used on the stainless steel wire. However, the existing squeeze dry roller materials are mostly single rubber or simply blended rubber materials, which are difficult to make the squeeze dry roller have good acid resistance, oil resistance and tensile strength at the same time. Meanwhile, the existing squeeze dry roller rubber materials have poor heat conduction effect, which can easily cause heat stress concentration on the surface or inside of the squeeze dry roller, leading to cracking of the squeeze dry roller and shortening the service life of the squeeze dry roller.

[0003] The defects of the existing squeeze dry roller materials are as follows: Patent document CN104877194B discloses a rubber squeeze dry roller stick surface material and a squeeze dry roller manufacturing method. The main rubber includes nitrile rubber and chlorosulfonated polyethylene rubber. The above patent effectively improves the wear resistance and corrosion resistance of the rubber material by changing the raw material components of the squeeze dry roller. However, the above patent does not consider the problem of poor compatibility of the main rubber, which is difficult to effectively improve the corrosion resistance of the squeeze dry roller, and does not consider the problem that the heat stress concentration on the surface and inside of the squeeze dry roller can easily cause cracking of the squeeze dry roller. SUMMARY

[0004] The present application aims to provide a stainless steel wire general squeeze dry roller composite material and a preparation method to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a stainless steel wire general squeeze dry roller composite material, which comprises the following weight parts of preparation raw materials: hydrogenated nitrile rubber 30-70 parts, fluorine rubber 20-60 parts, acrylate rubber 10-30 parts, carbon fiber 5-20 parts, graphene oxide 10-40 parts, alumina microspheres 5-25 parts, crosslinking agent 1-10 parts, anti-aging agent 1-5 parts and reinforcing agent 5-30 parts. The hydrogenated nitrile rubber, fluorine rubber and acrylate rubber constitute a composite rubber body containing an interpenetrating network structure. The carbon fiber, graphene oxide and alumina microspheres constitute a heat conduction structure in the composite rubber body.

[0006] Preferably, the mass ratio of hydrogenated nitrile rubber, fluoro rubber and acrylate rubber in the composite rubber system is (1.5-3):(0.5-2):(0.1-1.5).

[0007] Preferably, the cross-linking agent comprises a first peroxide cross-linking agent, a second peroxide cross-linking agent and a third peroxide cross-linking agent. The anti-aging agent is styrenated diphenylamine. The reinforcing agent comprises at least one of white carbon black, carbon black and nano-silica.

[0008] A preparation method of a stainless steel wire general-purpose squeeze roller composite material, the preparation method comprising the following steps: S1, preparing a composite rubber body containing a three-dimensional interpenetrating network structure; S2, forming a continuous heat conduction channel in the composite rubber body to obtain an intermediate rubber body with high heat conduction performance; S3, adding an anti-aging agent and a reinforcing agent to the intermediate rubber body and mixing uniformly to obtain a rubber composite material; S4, extruding the rubber composite material obtained in S3 and performing vulcanization treatment at 180-200°C.

[0009] Preferably, S1 comprises the following steps: S11, adding hydrogenated nitrile rubber and a first peroxide cross-linking agent to a banbury mixer, mixing at 100-120°C for 8-15 min, then increasing the temperature to 135-150°C and maintaining for 10-15 min to obtain a first rubber body containing a first network structure; S12, adding fluoro rubber and a second peroxide cross-linking agent to the first rubber body, mixing at 90-110°C for 8-15 min, then increasing the temperature to 160-170°C and maintaining for 10-20 min to obtain a second rubber body containing a first interpenetrating structure; S13, adding acrylate rubber, a third peroxide cross-linking agent and zinc oxide to the second rubber body, mixing at 100-110°C for 8-15 min, then increasing the temperature to 160-170°C and maintaining for 10-20 min to obtain a composite rubber body containing a three-dimensional interpenetrating network structure.

[0010] Preferably, the first peroxide cross-linking agent is one of dicumyl peroxide or bis-isopropyl benzene peroxide; The second peroxide cross-linking agent is dichlorodiphenylmethane; The third peroxide cross-linking agent is benzoyl peroxide.

[0011] Preferably, S2 comprises the following steps: S21. After cleaning the carbon fiber surface with ethanol, take it out and dry it. Then, modify the carbon fiber with magnetic nanoparticles, and then modify it with the first silane coupling agent and dry it. Sheet-shaped graphene oxide is made into sheet-shaped graphene slurry, and the graphene slurry is uniformly coated on the surface of the release substrate to form a sheet-shaped graphene layer with a thickness of 5 to 15 μm. The modified carbon fibers are uniformly laid on the surface of the sheet graphene layer. An external magnetic field is used to guide the carbon fibers to be perpendicular to the sheet graphene layer. Sheet graphene slurry is then coated on the top of the carbon fibers. After drying and curing, the carbon fibers are separated from the surface of the release substrate to obtain the thermally conductive skeleton matrix.

[0012] Preferably, step S2 further includes the following step: S22. Take hydrogenated nitrile rubber latex and mix it with the second silane coupling agent to obtain a skeleton modified latex. Spray the skeleton modified latex onto one side of the surface of the thermally conductive skeleton substrate, heat treat it at 80-120℃ for 5-20 minutes, and then take it out and cool it. The cooled thermally conductive frame is crushed to obtain a sheet-like thermally conductive frame; S23. The sheet-like thermally conductive skeleton and alumina microspheres are added to the composite rubber obtained in S1 for blending.

[0013] Preferably, step S4 further includes the following steps; S41. Inject the composite rubber material into the extrusion roller mold to obtain a cylindrical extrusion roller body; S42. A magnetic jacket is installed on the outside of the cylindrical squeeze roller, and a cylindrical magnet is installed at the center of the squeeze roller shaft to form a directional guiding magnetic field, which guides and sorts the heat-conducting skeleton in a directional manner, so that the heat-conducting skeleton forms an orderly heat-conducting structure in the squeeze roller body. S43. The extrusion roller body is vulcanized.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention first generates a first rubber network, and then sequentially inserts a second rubber network and a third rubber network to form an interpenetrating network in the composite material, which improves the oil and acid resistance and tensile strength of the rubber composite material. By adding a thermally conductive skeleton and forming an ordered thermally conductive structure, the thermal conductivity of the composite material is improved, avoiding cracking caused by thermal stress concentration in the squeeze roller and extending the service life of the squeeze roller.

[0015] 2. The formation of the interpenetrating network in this invention enhances the compatibility and bonding ability of the three rubbers in the rubber system, thereby improving the structural stability of the composite rubber system, so that the rubber roller can maintain stable performance under the conditions of oil and pickling solution.

[0016] 3、The application constructs a sandwich type heat conduction structure, so that the sheet-shaped graphene oxide layer is parallel to the squeeze roller layer, thereby being able to receive more heat for transmission, and the strip-shaped carbon fiber provides an ordered heat conduction path, so that heat can be quickly transmitted along the path, the heat conduction path is shortened, and the heat conduction capacity of the composite material is improved.

[0017] 4、The application modifies the carbon fiber, improves the bonding of the strip-shaped carbon fiber and the graphene oxide sheet layer, so that the strip-shaped carbon fiber can still remain vertical when mixed with the heat conduction framework and the rubber composite material system, which is helpful to the formation of the heat conduction path, the surface of the heat conduction framework is modified, the compatibility of the heat conduction framework and the rubber composite material is improved, and the uniform distribution of the heat conduction framework is beneficial. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to specific embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0019] A preparation method of a stainless steel wire universal squeeze roller composite material is used for preparing a composite material for producing a squeeze roller, and the preparation method comprises the following steps: S1, preparing a composite rubber body containing a three-dimensional interpenetrating network structure; Specifically, S11, hydrogenated nitrile rubber and a first peroxide crosslinking agent are added to a banbury mixer, the first peroxide crosslinking agent is one of dicumyl peroxide or dicumyl peroxide, and the mass ratio of the hydrogenated nitrile rubber to the first peroxide is (30-70):(0.5-2), mixing is carried out at 100-120 DEG C for 8-15 min, then the temperature is increased to 135-150 DEG C and maintained for 10-15 min, and a first rubber body containing a first network structure is obtained; S12, fluororubber and a second peroxide crosslinking agent are added to the first rubber body, the second peroxide crosslinking agent is dichlorodiphenylmethane, and the mass ratio of the fluororubber to the second peroxide crosslinking agent is (20-60):(0.3-1.8), mixing is carried out at 90-110 DEG C for 8-15 min, then the temperature is increased to 160-170 DEG C and maintained for 10-20 min, and a second rubber body containing a first interpenetrating structure is obtained; S13, adding acrylate rubber, third peroxide crosslinking agent and zinc oxide into the second rubber body, wherein the third peroxide crosslinking agent is benzoyl peroxide, and the mass ratio of the acrylate rubber, the third peroxide crosslinking agent and the zinc oxide is (10-30):(0.2-2):(0.5-5), mixing at 100-110℃ for 8-15min, then increasing the temperature to 160-170℃ and maintaining for 10-20min, to obtain a composite rubber body containing a three-dimensional interpenetrating network structure; Under the temperature rising effect of the internal mixer, the first peroxide crosslinking agent decomposes to generate free radicals and hydrogen abstraction, forming rubber macromolecular radicals, and molecular bonds are formed between the free radicals to crosslink, so that a continuous network skeleton is formed in the hydrogenated nitrile rubber, and the formation of the continuous network skeleton provides support for the subsequent introduction and interpenetration of the fluororubber and the acrylate rubber, then by adding the fluororubber and the corresponding second peroxide crosslinking agent, the second peroxide crosslinking agent breaks the fluororubber molecular chain to form crosslinking points, and in the mixing process, the broken fluororubber molecules pass through the continuous network skeleton formed in the hydrogenated nitrile rubber and are crosslinked by the covalent bonds of the crosslinking points, thereby forming an interpenetrating structure with the continuous network skeleton, obtaining an interpenetrating network containing two network structures, the introduction of the fluororubber network improves the acid resistance and strength of the rubber system on the basis of the excellent thermal stability and oil resistance of the hydrogenated nitrile rubber containing the continuous network skeleton, and the addition of the acrylate rubber, the third peroxide crosslinking agent and zinc oxide causes the acrylate rubber molecular chain to penetrate the interpenetrating network containing two network structures and be crosslinked under the action of the third peroxide crosslinking agent, so that the composite rubber system contains an interpenetrating network containing three network structures, and the addition of zinc oxide is beneficial to promoting the interface stability of the composite rubber system and improving the interfacial compatibility of the three rubbers, so that the molecular chains can penetrate more smoothly to form an interpenetrating network, improve the fusion effect of the three rubbers, and enable the rubber composite material to maintain beneficial integrity in a high-temperature, oil or acidic environment, thereby improving the fatigue strength of the composite material, and the addition of the polyacrylate rubber molecular chain network improves the wear resistance, aging resistance and mechanical properties of the composite rubber system.

[0020] S2, forming a continuous heat-conducting channel in the composite rubber body to obtain an intermediate rubber body with high heat-conducting performance; S2 includes: S21, using ethanol to clean the surface of the carbon fiber, then taking out and drying, using magnetic nanoparticles to modify the carbon fiber, and then performing a first silane coupling agent modification treatment and drying; Specifically, the carbon fiber is a strip-shaped carbon fiber with a length of 0.1-0.5 mm, and an ethanol solution for cleaning is prepared by using anhydrous ethanol and deionized water in a mass ratio of 7:3, the carbon fiber is placed in the ethanol solution, and the mass ratio of the carbon fiber to the ethanol solution is 1:(15-20), and the cleaning is assisted by ultrasonic waves, and after being taken out, the carbon fiber is dried at 85-120°C for 10-30 min, Fe3O4 is taken as the magnetic nanoparticle, and a nanoparticle modification solution is prepared, wherein the ratio of the magnetic nanoparticle, ethanol and water in the nanoparticle modification solution is (0.1-0.3):1:1, the carbon fiber is immersed in the nanoparticle modification solution, and the ratio of the carbon fiber to the nanoparticle modification solution is 1:(5-15), and the stirring is performed at room temperature for 20-50 min, and after being taken out, the carbon fiber is dried, 1-4.5wt% of γ-aminopropyl triethoxysilane is selected as the first silane coupling agent, a modification aqueous solution is prepared by using the first silane coupling agent, anhydrous ethanol and deionized water, and acetic acid is added to adjust the pH of the modification aqueous solution to 4-5.5, the carbon fiber is mixed with the first silane coupling agent in a ratio of 1:(2-15), the carbon fiber is immersed and modified, and after being taken out, the carbon fiber is dried and solidified to obtain the modified carbon fiber; In the process of modifying the carbon fiber, the ethanol solution is used to assist the ultrasonic wave to clean the surface, so that the active sites on the surface of the carbon fiber are exposed, then the magnetic nanoparticle is used to modify and magnetize the carbon fiber, so that the magnetic nanoparticle is loaded on the surface of the carbon fiber, and then the silane coupling agent with different connecting ends is used to treat the magnetized carbon fiber, the first silane coupling agent forms active silanol groups and amino groups after hydrolysis, the active silanol groups react with the magnetized carbon fiber to form a condensation reaction and reserve the other end of the connecting site for use; The sheet-shaped graphene oxide is made into a sheet-shaped graphene slurry, the graphene slurry is uniformly coated on the surface of a release substrate to form a sheet-shaped graphene layer with a thickness of 5-15μm; Specifically, (10-40) parts of graphene oxide are mixed with deionized water, and (0.2-0.5) parts of PVP are added as an additive, and the mixture is dispersed under the assistance of ultrasonic waves for 10-30 min to obtain a graphene slurry with a graphene content of 2-8wt%, and then the graphene slurry is uniformly coated on the surface of a release substrate, and the graphene slurry is dried at 60-90°C for 10-30 min to obtain a sheet-shaped graphene layer; The sheet-shaped graphene oxide is made into a graphene slurry, and is uniformly laid on the surface of a release substrate, and during the drying process, the solvent in the slurry gradually volatilizes, and the sheet-shaped graphene oxide forms a continuous sheet-shaped graphene layer under the action of stacking and van der Waals force, and the interlayer bonding of the sheet-shaped graphene oxide in the sheet-shaped graphene layer is further enhanced under the action of the additive, so that the interlayer separation of the sheet-shaped graphene oxide in the subsequent process is avoided; The carbon fibers obtained after modification are evenly laid on the surface of the sheet-shaped graphene layer, the carbon fibers are guided to be perpendicular to the sheet-shaped graphene layer by an external magnetic field, and sheet-shaped graphene slurry is coated on the top of the carbon fibers, and after drying and curing, the sheet-shaped graphene slurry is separated from the surface of the release substrate to obtain a heat-conducting skeleton matrix; Specifically, the density of the carbon fibers on the surface of the sheet-shaped graphene layer is 5-20 g / m2, then parallel electrodes are arranged on both sides of the sheet-shaped graphene layer or an external static magnetic field is applied, under the action of the magnetic field, the carbon fibers are in a perpendicular state with the sheet-shaped graphene layer, then graphene slurry is laid on the top of the carbon fibers again, so that the top of the carbon fibers also generates a sheet-shaped graphene layer with the same thickness, and the graphene oxide layer and the carbon fiber complex are dried at 70-120℃ for 20-40 min, then the complex is peeled off from the surface of the release substrate to obtain a heat-conducting skeleton matrix; Under the action of the external magnetic field, the magnetically modified carbon fibers are rotated to be perpendicular to the sheet-shaped graphene layer, and the modified carbon fibers are combined with the carboxyl groups on the surface of the graphene oxide through the connection sites at the ends of the modified carbon fibers, forming a chemical connection bond, and the π-π stacking action between the carbon fibers and the graphene oxide forms multiple combinations, improving the connection relationship between the carbon fibers and the sheet-shaped graphene layer and the overall strength, and being beneficial to reducing the interfacial thermal resistance between the heat-conducting skeleton matrix and improving the heat conduction capacity of the heat-conducting skeleton matrix; S2 further includes the following steps: S22, mixing the hydrogenated nitrile rubber emulsion and the second silane coupling agent to obtain a skeleton modification emulsion, spraying the skeleton modification emulsion on one side surface of the heat-conducting skeleton matrix, and taking out and cooling after heat treatment at 80-120℃ for 5-20 min; Specifically, the hydrogenated nitrile rubber emulsion and the alkoxy silane with a mass fraction of 1-4.5wt% are mixed at a mass ratio of 100: (0.5-5), and after stirring at room temperature for 10-20 min, a skeleton modification solution is obtained; The cooled heat-conducting skeleton is crushed to obtain a sheet-shaped heat-conducting skeleton, and the size of the sheet-shaped heat-conducting skeleton is 0.5-1.5 mm; The second silane coupling agent and the hydrogenated nitrile rubber emulsion are used to modify the heat-conducting skeleton matrix, the active silanol groups at the end are combined with the surface of the heat-conducting skeleton matrix during the heat treatment process, and the rubber particles in the hydrogenated nitrile rubber emulsion form a thin film layer on the surface of the skeleton, which is beneficial to improving the compatibility of the heat-conducting skeleton and the rubber system; S23, adding the sheet-shaped heat-conducting skeleton and the alumina microspheres to the composite rubber body obtained in S1 for blending, wherein the ratio of the sheet-shaped heat-conducting skeleton to the alumina microspheres is (3-10):(5-25), and the particle size of the alumina microspheres is 10-30 μm; S3, adding anti-aging agent and reinforcing agent into the intermediate rubber body and mixing uniformly to obtain a rubber composite material, wherein the anti-aging agent is styrene diphenylamine, the reinforcing agent is white carbon black, and the mixing ratio of the intermediate rubber body, the anti-aging agent and the reinforcing agent is (60-150):(1-5):(5-30), and the mixing is carried out at 80-110℃ for 5-20min; The heat-conducting framework is crushed into flaky heat-conducting framework by shearing crushing or low-temperature crushing, and the flaky heat-conducting framework layer still maintains the sandwiched heat-conducting framework structure of flaky graphene plane layer-vertical carbon fiber layer-flaky graphene plane layer, the whole or large-volume heat-conducting framework is cut into flaky heat-conducting framework with controllable particle size, which is beneficial to improve the dispersion effect of the heat-conducting framework in the composite rubber body, make the heat-conducting framework uniformly distributed in the composite rubber body, and avoid the stress concentration phenomenon of the squeeze dry roller in processing or use caused by the introduction of large particles, reduce the cracking probability of the squeeze dry roller, and the introduction of aluminum oxide microspheres fills the analysis between the heat-conducting frameworks, and then forms a continuous heat-conducting structure in the composite rubber body, further improves the heat-conducting effect of the composite material, and the addition of anti-aging agent and reinforcing agent is beneficial to improve the mechanical strength, fatigue resistance and anti-aging ability of the composite rubber body, so that the squeeze dry roller still has a long service life in oil, acid and other environments; S4, extruding the rubber composite material obtained in S3 into a shape, and performing vulcanization treatment at 180-200℃; Which includes S41, injecting the composite rubber material into the squeeze dry roller mold to obtain a cylindrical squeeze dry roller body; S42, setting a magnetic sleeve outside the cylindrical squeeze dry roller, and setting a cylindrical magnet at the center of the squeeze dry roller shaft to form a directional guiding magnetic field, which sorts the heat-conducting framework in a directional manner, so that the heat-conducting framework forms an ordered heat-conducting structure in the squeeze dry roller body; Or extruding and pressing the composite rubber material into a sheet, and setting a directional guiding magnetic field on the upper and lower sides of the sheet; S43, performing vulcanization treatment on the squeeze dry roller body, specifically including vulcanization treatment at 160-210℃, 8-15MPa for 1-5h; When the squeeze dry roller body or the composite material sheet is applied to prepare a squeeze dry roller, the cylindrical squeeze dry roller body is sleeved outside the squeeze dry roller core, wherein the outer wall of the squeeze dry roller core is provided with a heat dissipation groove, or the squeeze dry roller core is supported by a high-heat-conducting and high-strength heat-conducting metal such as copper or aluminum alloy, and a cooling liquid flow channel can be arranged inside the squeeze dry roller core, so that the squeeze dry roller core has excellent heat dissipation capacity; The composite rubber material is made into a squeezing roller body. Under the action of the directional guiding magnetic field, the magnetic modified carbon fibers in the heat-conducting framework are oriented and rotated in situ. The sandwiched sheet-shaped heat-conducting framework is rotated into a sheet-shaped graphene oxide layer arranged in parallel with the surface of the squeezing roller body, and the carbon fibers are arranged in a straight line pointing to the axial direction, forming a heat-conducting structure. The generation of the heat-conducting structure increases the area of the squeezing roller receiving heat, facilitating the collection and transmission of heat generated during the contact between the surface of the squeezing roller and the stainless steel plate. The arrangement of the carbon fibers pointing to the axial direction directionally guides the heat, enabling the heat to be orderly transmitted along the carbon fibers to the squeezing roller core for dissipation, shortening the heat transmission path, improving the heat-conducting effect of the composite material, and avoiding the accumulation of heat in the squeezing roller, which may cause heat concentration and cracking of the squeezing roller.

[0021] Example one A stainless steel wire universal squeezing roller composite material is prepared by the following steps: S11, 60 parts of hydrogenated nitrile rubber and 1.2 parts of dicumyl peroxide are added to a mixer, and mixed at 110°C for 10 minutes, then the temperature is raised to 145°C and maintained for 13 minutes to obtain a first rubber body containing a first network structure; S12, 40 parts of fluorine rubber and 0.8 parts of dichlorodiphenylacetylene are added to the first rubber body, and mixed at 100°C for 10 minutes, then the temperature is raised to 160°C and maintained for 15 minutes to obtain a second rubber body containing a first interpenetrating structure; S13, 20 parts of acrylate rubber, 0.6 parts of benzoyl peroxide and 4 parts of zinc oxide are added to the second rubber body, and mixed at 105°C for 10 minutes, then the temperature is raised to 165°C and maintained for 17 minutes to obtain a composite rubber body containing a three-dimensional interpenetrating network structure; S21, 15 parts of carbon fibers with a length of 0.3mm are washed with ethanol solution at a ratio of 1:15, and the carbon fibers are placed in a nano-particle modified solution of 150 parts for magnetic modification. The ratio of magnetic nano-particles, ethanol and water in the nano-particle modified solution is 0.2:1:1. After stirring at room temperature for 30 minutes, the modified carbon fibers are taken out and dried. The magnetically modified carbon fibers are placed in a modified water solution of 120 parts for further modification for 40 minutes. The mass fraction of the first silane coupling agent in the modified water solution is 2wt%, and the pH is 4.5. After that, it is taken out and dried at 110°C for 40 minutes to obtain modified carbon fibers; 35 parts of sheet-shaped graphene oxide are used to prepare a graphene slurry with a graphene oxide solid content of 5wt%. The amount of additive is 0.3 parts. The graphene slurry is uniformly laid on the surface of the centrifugal base material, and is dried at 80°C for 25 minutes to obtain a sheet-shaped graphene layer with a thickness of 10μm; After the modified carbon fiber is evenly laid on the surface of the sheet-shaped graphene layer, the longitudinal magnetic guidance is performed on the modified carbon fiber under the condition of an external magnetic field of 0.15 T for 1 min, and the same thickness of sheet-shaped graphene layer is arranged on the top of the modified carbon fiber again; S22, 80 parts of hydrogenated nitrile rubber emulsion with a rubber particle solid content of 20wt% and 0.8 parts of a second silane coupling agent are mixed, and the mixture is stirred at room temperature for 15 min to obtain a skeleton modification solution. The skeleton modification solution is sprayed on one side of the heat-conducting skeleton matrix, and after heat treatment at 100°C for 10 min, the heat-conducting skeleton matrix is taken out, cooled, and then crushed into sheet-shaped heat-conducting skeleton with a sheet diameter of 0.8 mm; S23 and S3, the sheet-shaped heat-conducting skeleton is added to the composite rubber body, and 15 parts of alumina microspheres with a particle size of 20 μm, 2 parts of an anti-aging agent, and 25 parts of white carbon black are added. Mixing at 110°C for 15 min obtains a rubber composite material; S41, the composite rubber material is injected into the squeeze roll mold to obtain a cylindrical squeeze roll body; S42, a magnetic sleeve is arranged outside the cylindrical squeeze roll, a cylindrical magnet is arranged at the center of the squeeze roll shaft to form a directional guiding magnetic field, the directional magnetic field strength is 0.2 T, the heat-conducting skeleton is directionally guided and sorted, the guiding time is 2 min, and the heat-conducting skeleton forms an ordered heat-conducting structure in the squeeze roll body. 185°C, 8MPa, 2h, cooling, demolding, preparing the squeeze roll core with heat-conducting grooves or containing cooling liquid channels, and the squeeze roll body is sleeved on the squeeze roll core to form a stainless steel wire general-purpose squeeze roll.

[0022] Example two The difference between example two and example one is that the S1 step in example two is as follows: 60 parts of hydrogenated nitrile rubber, 40 parts of fluoroelastomer, and 20 parts of acrylate rubber are simultaneously added to the internal mixer, and the mixture is blended at 125°C for 40 min to obtain a mixed rubber body. Then, the sheet-shaped heat-conducting skeleton, alumina microspheres, an anti-aging agent, and a reinforcing agent are added to the mixed rubber body in the same proportion for mixing to obtain a composite material.

[0023] Example three The difference between example three and example one is that the S2 step in example three is that 15 parts of carbon fiber and 35 parts of sheet-shaped oxidized graphene are added to the composite rubber body for mixing after obtaining the composite rubber body. The remaining steps are the same as those of example one.

[0024] Performance test, the performance test of the rubber roll body prepared from the rubber composite material in the above three groups of examples (the performance test of the rubber roll body represents the performance test of the squeeze roll composite material); Three groups of extrusion roller body material samples corresponding to the embodiments are obtained, the sample size is a long strip-shaped sheet or dumbbell-shaped sheet with a size of 25mm*25mm*2mm, and the performance detection conditions and standards are as follows: ASTM standard oil is used as the test medium, the test condition is 110℃, 24h, the reference standard is GB / T1690, the oil resistance weight change rate of the composite material is tested, and the test process includes taking 3 groups of samples for each embodiment, drying at 100℃ for 1h, cooling to room temperature, obtaining the initial weight of the sample, immersing the sample in the set medium and condition, then taking out and wiping the surface, weighing and obtaining the weight after the test after standing at room temperature for 30min, and then calculating the average oil resistance weight change rate; 5% sulfuric acid is used as the test medium, the test condition is 50℃, 24h, the reference standard is GB / T1690, the acid resistance volume change rate of the composite material is tested, and the test process includes taking 3 groups of samples for each embodiment, obtaining the initial volume of the sample (the sample volume can be obtained by the liquid displacement method), immersing the sample in the set medium and condition, then taking out, cleaning and wiping, weighing and obtaining the volume after the test after standing at room temperature for 30min, and then calculating the average acid resistance change rate; The reference standard is GB / T528, the test condition is to test the tensile strength of the sample at room temperature at a speed of 500mm / min, and the average value is calculated; A circular sheet-shaped material sample with a diameter of 10mm and a thickness of 2mm is taken on the extrusion roller, and the surface of the circular sheet sample is parallel to the surface of the extrusion roller body, the sample is horizontally arranged with the circular surface upward, the thermal conductivity of the sample is tested by laser flash method, and the laser is shot from the top of the circular surface; The performance test results are shown in the following table ; According to the above test results, it can be seen that the rubber system forming the interpenetrating network has better mechanical properties than the mixed rubber formed by simple blending, the tensile strength and acid resistance, oil resistance and other chemical medium resistance are obviously improved, so that the extrusion roller has good shape retention effect in the process of removing oil acid from the stainless steel plate in the production of stainless steel plate by the stainless steel line, which is beneficial to improve the service life of the extrusion roller, and by establishing an ordered heat conduction structure, the heat conduction capacity of the extrusion roller is improved, the heat generated in the process of friction and extrusion between the stainless steel plate and the extrusion roller can be more effectively received and orderly transmitted for heat dissipation, so as to prevent the phenomenon of cracking of the surface and the inside of the extrusion roller due to heat concentration.

[0025] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A composite material for a universal extrusion roller used in stainless steel wire production, characterized in that, The preparation raw materials include the following weight parts: hydrogenated nitrile rubber 30-70 parts, fluororubber 20-60 parts, acrylate rubber 10-30 parts, carbon fiber 5-20 parts, graphene oxide 10-40 parts, alumina microspheres 5-25 parts, crosslinking agent 1-10 parts, anti-aging agent 1-5 parts and reinforcing agent 5-30 parts; The hydrogenated nitrile rubber, fluororubber and acrylate rubber constitute a composite rubber body containing an interpenetrating network structure; The carbon fiber, graphene oxide and alumina microspheres constitute a heat conduction structure in the composite rubber body.

2. A composite material for a general-purpose wringing roller for stainless steel wire according to claim 1, characterized in that: The mass ratio of the hydrogenated nitrile rubber, fluororubber and acrylate rubber in the composite rubber system is (1.5-3):(0.5-2):(0.1-1.5).

3. A composite material for a general-purpose squeeze roll for stainless steel wire according to claim 1, characterized in that: The crosslinking agent includes a first peroxide crosslinking agent, a second peroxide crosslinking agent and a third peroxide crosslinking agent; The anti-aging agent is styrenated diphenylamine; The reinforcing agent includes at least one of white carbon black, carbon black and nano silicon dioxide.

4. A method for producing a composite material for a general-purpose squeeze roll for stainless wire, for producing the composite material for a general-purpose squeeze roll for stainless wire according to claim 1, characterized by: The preparation method includes the following steps: S1, preparing a composite rubber body containing a three-dimensional interpenetrating network structure; S2, forming a continuous heat conduction channel in the composite rubber body to obtain an intermediate rubber body with high heat conduction performance; S3, adding the anti-aging agent and the reinforcing agent to the intermediate rubber body and uniformly mixing to obtain a rubber composite material; S4, extruding the rubber composite material obtained in S3 and performing vulcanization treatment at 180-200℃.

5. A method of making a composite material for a general-purpose wringing roller for stainless steel wire according to claim 4, characterized in that: The S1 includes the following steps: S11, adding the hydrogenated nitrile rubber and the first peroxide crosslinking agent to a banbury mixer, mixing at 100-120℃ for 8-15min, then increasing the temperature to 135-150℃ and maintaining for 10-15min to obtain a first rubber body containing a first network structure; S12, adding the fluororubber and the second peroxide crosslinking agent to the first rubber body, mixing at 90-110℃ for 8-15min, then increasing the temperature to 160-170℃ and maintaining for 10-20min to obtain a second rubber body containing a first interpenetrating structure; S13, adding the acrylate rubber, the third peroxide crosslinking agent and zinc oxide to the second rubber body, mixing at 100-110℃ for 8-15min, then increasing the temperature to 160-170℃ and maintaining for 10-20min to obtain a composite rubber body containing a three-dimensional interpenetrating network structure.

6. A method of making a composite material for a general-purpose wringing roller for stainless steel wire according to claim 5, characterized in that: The first peroxide crosslinking agent is one of dicumyl peroxide or bis-isopropyl benzene peroxide; The second peroxide crosslinking agent is dichlorodiphenylmethane; The third peroxide crosslinking agent is benzoyl peroxide.

7. A method of making a composite material for a general-purpose wringing roller for stainless steel wire according to claim 5, characterized in that: The S2 includes the following steps: S21, after surface cleaning of the carbon fiber using ethanol, taking out and drying, modifying the carbon fiber using magnetic nanoparticles, and then modifying using a first silane coupling agent and drying; The sheet-shaped graphene oxide is made into sheet-shaped graphene slurry, and the graphene slurry is uniformly coated on the surface of a release substrate to form a sheet-shaped graphene layer with a thickness of 5-15μm; The sheet-shaped graphene oxide is made into sheet-shaped graphene slurry, and the graphene slurry is uniformly coated on the surface of a release substrate to form a sheet-shaped graphene layer with a thickness of 5-15μm; The carbon fiber obtained after modification is evenly laid on the surface of the sheet-shaped graphene layer, the carbon fiber is guided to be perpendicular to the sheet-shaped graphene layer by an external magnetic field, sheet-shaped graphene slurry is coated on the top of the carbon fiber, and the sheet-shaped graphene slurry is separated from the surface of the release substrate after drying and curing to obtain a heat-conducting skeleton matrix.

8. A method of making a composite material for a general-purpose wringing roller for stainless steel wire according to claim 7, characterized in that: The S2 further comprises the following steps: S22, mixing the hydrogenated nitrile rubber emulsion with the second silane coupling agent to obtain a skeleton modification emulsion, spraying the skeleton modification emulsion on one side surface of the heat-conducting skeleton matrix, and taking out and cooling after heat treatment at 80-120℃ for 5-20 min; The cooled heat-conducting skeleton is crushed to obtain a sheet-shaped heat-conducting skeleton; S23, adding the sheet-shaped heat-conducting skeleton and the alumina microspheres to the composite rubber body obtained in S1 for blending.

9. A method of making a composite material for a general-purpose wringing roller for stainless steel wire according to claim 8, characterized in that: The S4 further comprises the following steps: S41, injecting the composite rubber material into an extrusion roller mold to obtain a cylindrical extrusion roller body; S42, setting a magnetic sleeve outside the cylindrical extrusion roller, setting a cylindrical magnet at the center of the extrusion roller shaft to form a directional guiding magnetic field, and directionally guiding and sorting the heat-conducting skeleton to form an ordered heat-conducting structure in the extrusion roller body; S43, vulcanization treatment is performed on the extrusion roller body.