A kind of silicon dioxide microcapsule doped water lubricated bearing material and preparation method

Abstract

The present invention discloses a silica microcapsule doped water-lubricated bearing material and a preparation method, which belongs to the technical field of polymer materials. The preparation method includes the steps of uniformly mixing a polymer matrix material and hollow silica particles, cold-pressing the mixed material, sintering the mixed material, and immersing the sintered material in oil (lubricating medium). The present invention dopes hollow silica particles that are not adsorbed with a lubricating medium into a polymer matrix material, so that even if the hollow silica particles are structurally damaged during the sintering process, the lubricating medium will not be lost. In addition, the hollow silica particles used in the present invention have better temperature resistance than other microcapsule materials. Therefore, when the polymer matrix material doped with hollow silica particles is placed in a lubricating medium, a sufficient number of oil-containing (i.e., lubricating medium) microcapsules can be formed in the polymer matrix material, thereby effectively achieving the effect of reducing wear and resisting wear.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to a silicon dioxide microcapsule-doped water-lubricated bearing material and a preparation method thereof. Background Art

[0002] Water-lubricated bearings, as a new and environmentally friendly device, have attracted widespread attention from researchers. Their uniqueness lies in their ability to work stably and reliably under water lubrication rather than grease lubrication conditions. They have the characteristics of simple structure, easy processing, pollution-free, and long service life. They can solve the problems of environmental pollution and resource waste caused by lubricating oil leakage in ship transmission systems from the source, and are conducive to building a new type of ship propulsion system that is pollution-free, widely available, and highly stable. Therefore, water-lubricated bearings have broad application prospects, especially in ship rudder bearings, stern bearings, centrifugal pumps, hydro-turbine generators, water circulation systems and other components.

[0003] When the ship propulsion system is started, the bearing speed is too low and is in a boundary lubrication state, making it difficult to form a complete lubricating water film on its surface. Moreover, under the action of the main shaft and seawater pressure, the bearing load-bearing part is easily deformed, the bearing clearance is reduced, the contact area between the bearing and the sleeve is increased, and the interface roughness peaks are in contact with each other and the interaction force is higher than the material yield stress, which will cause the roughness peaks to deform and break, and eventually cause serious wear of the bearing base material and generate a lot of friction noise, which seriously affects the operation of the ship and greatly shortens the service life of the bearing. Therefore, the preparation technology and evaluation system of high-performance, low-wear, and high-durability water-lubricated bearings urgently need to be established.

[0004] Microcapsule doping and modification of polymer materials originates from the stronger film-forming ability of liquid lubricants, but the molecular structure difference between liquid lubricants and polymer matrices is large, and direct filling will greatly reduce the strength of the material. Therefore, researchers have developed microcapsules containing solid shells and liquid lubricant cores. For example, the Chinese patent document with announcement number CN106674748B discloses an organic / inorganic hybrid double-walled self-lubricating microcapsule, including a capsule wall and a self-lubricant wrapped by the capsule wall. However, when using such self-lubricating microcapsules, the self-lubricating microcapsules need to be first doped into the polymer matrix material, and then the polymer matrix material doped with the self-lubricating microcapsules is sintered. For existing special polymer materials such as polyetheretherketone, polyimide, etc., during the sintering process, the lubricating medium in the microcapsule is easy to volatilize and lose, and the mechanical properties of the outer wall of the microcapsule are also weakened due to high temperature, which makes the friction reduction and anti-wear effect of the microcapsule limited.

[0005] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0006] The purpose of the present invention is to provide a silica microcapsule-doped water-lubricated bearing material and a preparation method, aiming to solve the problem that the existing microcapsule-doped polymer matrix material has limited wear-reducing and anti-wear effects on the polymer matrix material.

[0007] To achieve the above object, the solution provided by the present invention is:

[0008] The present invention provides a method for preparing a silica microcapsule-doped water-lubricated bearing material, comprising the following steps:

[0009] S001. The polymer matrix material and the hollow silica particles are mixed evenly;

[0010] S002. The mixed material in step S001 is filled into a mold and cold pressed;

[0011] S003. After the cold pressing is completed, the formed material is placed in a muffle furnace for sintering;

[0012] S004. After sintering, the sintered material is placed in a lubricating medium, and the lubricating medium is placed in a vacuum drying oven so that the lubricating medium is sucked into the hollow silica particles;

[0013] S005. The sintered material is taken out from the lubricating medium, and the surface of the sintered material is cleaned to obtain a silica microcapsule-doped water-lubricated bearing material.

[0014] Optionally, in step S001, the polymer matrix material is polyetheretherketone or sulfonated modified polyetheretherketone.

[0015] Optionally, in step S001, the mass ratio of the hollow silica particles to the polymer matrix material is (0.5-14):100.

[0016] Optionally, in step S001, the particle size D of the hollow silica particles is 20-30 um.

[0017] Optionally, step S001 includes:

[0018] Add the polymer matrix material and hollow silica particles into a beaker;

[0019] Add an organic solvent into a beaker, and use a high-speed homogenizer to mix the polymer matrix material and the hollow silica particles uniformly;

[0020] After the mixing is completed, the mixed material is filtered to remove the organic solvent in the material;

[0021] After the filtration is completed, the evenly mixed material is placed in an oven for drying.

[0022] Optionally, in step S001, the organic solvent includes at least one of ethanol, acetone, and petroleum ether, and the mass ratio of the organic solvent to the polymer matrix material is 100:(1-10).

[0023] Optionally, in step S003, the sintering temperature is 360-380° C., and the sintering time is 4-05 hours.

[0024] Optionally, in step S004, the lubricating medium includes at least one of lubricating oil and hydrophilic silicone oil, and the temperature in the vacuum drying oven is 55-65°C.

[0025] Optionally, in step S005, ethanol is used to clean the surface of the taken-out sintered material.

[0026] The present invention also provides a silica microcapsule-doped water-lubricated bearing material, which is prepared by the above-mentioned preparation method of the silica microcapsule-doped water-lubricated bearing material.

[0027] The beneficial effects of the present invention are as follows: the present invention provides a method for preparing a water-lubricated bearing material doped with silica microcapsules. Based on the principle of solid-liquid coupling lubrication, silica microcapsules are introduced into a polymer matrix material, and the lubricating medium is released after the silica microcapsules are ruptured, a lubricating film is quickly formed on the dual surfaces, the dual surfaces are separated, the interfacial shear stress is reduced, and the friction coefficient and wear rate of the material are reduced.

[0028] Compared with the method of first doping microcapsules containing a lubricating medium into a polymer matrix material and then sintering the polymer matrix material doped with the self-lubricating microcapsules, the present invention dopes hollow silica particles that are not adsorbed with a lubricating medium into a polymer matrix material, so that even if the hollow silica particles are structurally damaged during the sintering process, the lubricating medium will not be lost.

[0029] In addition, the hollow silica particles used in the present invention have better temperature resistance than other microcapsule materials. Therefore, when the polymer matrix material doped with hollow silica particles is placed in a lubricating medium, a sufficient number of oil-containing (i.e., lubricating medium) microcapsules can be formed in the polymer matrix material, thereby effectively achieving the effect of reducing friction and resisting wear.

[0030] The present invention also provides a silica microcapsule doped water-lubricated bearing material, which is prepared by the above-mentioned preparation method of the silica microcapsule doped water-lubricated bearing material. The provided silica microcapsule doped water-lubricated bearing material has excellent water lubrication and mechanical properties. During the material friction process, the silica microcapsule can release the internal lubricating medium, promote the formation of the hydrated lubricating layer on the dual surface, separate the dual surface roughness peaks, thereby reducing the interface shear stress, reducing the friction coefficient of the material, and extending the service life of the water-lubricated bearing, so that the water-lubricated bearing material can be used under low-speed water-poor conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention provides a flow chart of a method for preparing a water-lubricated bearing material doped with silica microcapsules.

[0032] Figure 2 It is a friction coefficient curve diagram of the silica microcapsule-doped water-lubricated bearing material prepared in Examples 1 to 4.

[0033] Figure 3 It is the morphology of the wear scar of the silica microcapsule-doped water-lubricated bearing material prepared in Examples 1 to 3 after testing. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The present invention provides a method for preparing a silica microcapsule-doped water-lubricated bearing material, comprising the following steps:

[0036] S001. The polymer matrix material and the hollow silica particles are uniformly mixed so that the hollow silica particles are doped into the polymer matrix material;

[0037] S002. The mixed material in step S001 is filled into a mold for cold pressing. Cold pressing can give a greater pressure to the mixed material of the polymer matrix material and the hollow silica particles, thereby increasing the density of the material and enhancing the mechanical properties and friction properties of the material.

[0038] S003. After the cold pressing is completed, the formed material is placed in a muffle furnace for sintering, and the sintering process ensures that the polymer matrix material is melted;

[0039] S004. After sintering, the sintered material is placed in a lubricating medium, and the lubricating medium is placed in a vacuum drying oven so that the lubricating medium is sucked into the hollow silica particles;

[0040] S005. The sintered material is taken out from the lubricating medium, and the surface of the sintered material is cleaned to obtain a silica microcapsule-doped water-lubricated bearing material.

[0041] In step S001 of the above preparation method, the polymer matrix material is polyetheretherketone or sulfonated modified polyetheretherketone. Polyetheretherketone is a high-performance thermoplastic engineering plastic that exhibits a low friction coefficient under water lubrication conditions, which helps to reduce wear and improve the operating efficiency of the equipment. Therefore, polyetheretherketone can be used as the matrix material of water-lubricated bearings; and the sulfonated modified polyetheretherketone has a sulfonated group, which has the characteristics of a hydration effect, which can make the water-lubricated bearing material more easily adsorb cations in seawater, thereby forming a stable hydrated lubricating layer (i.e., a lubricating film) on the surface of the material, which can further reduce the friction coefficient and wear degree of the material. The hollow silica particles are silica materials containing a hollow cavity, and the shell layer of the hollow silica particles is a porous structure, so that the lubricating medium can be adsorbed into the hollow cavity of the particles through the shell layer of the hollow silica particles. When the hollow silica particles are doped into the polymer matrix material, silica microcapsules containing a lubricating medium can be formed in the polymer matrix material.

[0042] In step S004 of the above preparation method, the vacuum drying oven can provide a vacuum condition inside the vacuum drying oven. When the lubricating medium containing the sintered material is in a vacuum condition, the lubricating medium can enter the polymer matrix material through the pores of the polymer matrix material, so that the lubricating medium can be absorbed into the hollow cavity of the hollow silica particles, and the hollow silica particles can be transformed into silica microcapsules containing the lubricating medium.

[0043] Compared with the method of first doping microcapsules containing a lubricating medium into a polymer matrix material and then sintering the polymer matrix material doped with the self-lubricating microcapsules, the present invention dopes hollow silica particles that are not adsorbed with a lubricating medium into a polymer matrix material, so that even if the hollow silica particles are structurally damaged during the sintering process, the lubricating medium will not be lost.

[0044] In addition, the hollow silica particles used in the present invention have better temperature resistance than other microcapsule materials. Therefore, when the polymer matrix material doped with hollow silica particles is placed in a lubricating medium, a sufficient number of oil-containing (i.e., lubricating medium) microcapsules can be formed in the polymer matrix material, thereby effectively achieving the effect of reducing friction and resisting wear.

[0045] Optionally, in step S001, the particle size D of the hollow silica particles is 20-30 um. When the particle size of the hollow silica particles is small, the amount of lubricating medium adsorbed by the hollow silica particles is limited, and it is not possible to effectively reduce the wear and resist the wear of the polymer matrix material; and when the particle size of the hollow silica is large, it will cause the structural strength of the polymer matrix material to decrease, and the polymer matrix material will not be able to be normally used as the matrix material of water-lubricated bearings. In the present invention, when the particle size D of the hollow silica particles is within the above range, the polymer matrix material can be used as the matrix material of water-lubricated bearings, and the polymer matrix material has excellent water lubrication and mechanical properties.

[0046] Optionally, in step S001, the mass ratio of the hollow silica particles to the polymer matrix material is (0.5-12):100. The amount of hollow silica doped into the polymer matrix material cannot be too little or too much. When the amount of hollow silica doped into the polymer matrix material is too little, a sufficient number of oil-containing microcapsules cannot be formed in the polymer matrix material; and when the amount of hollow silica doped into the polymer matrix material is too much, the hollow silica particles will agglomerate severely, and the silica microcapsules doped into the polymer matrix material will easily peel off from the polymer matrix material, which will affect the friction properties of the polymer matrix material, and it will be difficult for the water-lubricated bearing material to form a hydrated lubricating layer on the dual surface.

[0047] Optionally, in step S002, the pressure of cold pressing is 10-120 MPa, and the temperature of cold pressing is 20-30° C. By controlling the pressure and temperature of cold pressing within the above parameter range, the polymer matrix material and the hollow silica particles can be more closely combined, and the hollow silica particles are not easily peeled off during the friction process of the water-lubricated bearing material, so that a sufficient number of oil-containing microcapsules can be maintained in the polymer matrix material.

[0048] Optionally, in step S003, the sintering temperature is 360-380°C and the sintering time is 4-5 hours. When the sintering temperature and the sintering time are controlled within the above parameter range, the polymer matrix material (polyetheretherketone) can be fully melted but will not decompose, thereby ensuring that the lubrication properties of the polymer matrix material are enhanced.

[0049] Optionally, in step S004, the lubricating medium includes at least one of lubricating oil and hydrophilic silicone oil. The temperature resistance of the lubricating medium can reach above 180°C. When the oil-containing microcapsules rupture and release the lubricating medium under sudden load, the lubricating medium is not easy to volatilize and decompose, so that the silica microcapsule doped water lubricated bearing material can maintain high lubrication efficiency.

[0050] Optionally, in step S004, the temperature in the vacuum drying oven is 55-65° C. This temperature range enables the lubricating medium to be adsorbed into the hollow silica particles at a faster speed, while having little safety hazard and preventing the lubricating medium from burning.

[0051] Optionally, in step S005, ethanol is used to clean the surface of the taken-out sintered material. Ethanol is compatible with the lubricating medium, and thus the excess lubricating medium on the surface of the sintered polymer matrix material can be effectively removed.

[0052] Optionally, step S001 may specifically include:

[0053] Add the polymer matrix material and hollow silica particles into a beaker;

[0054] Add an organic solvent into a beaker, and use a high-speed homogenizer to mix the polymer matrix material and the hollow silica particles evenly;

[0055] After the mixing is completed, the mixed material is filtered to remove the organic solvent in the material;

[0056] After the filtration is completed, the evenly mixed material is placed in an oven for drying, and the drying temperature can be 80°C.

[0057] The present invention disperses the polymer matrix material and hollow silica particles in an organic solvent, and uniformly mixes the polymer matrix material and the hollow silica particles by wet mixing, which can prevent the hollow silica particles from being crushed by external mechanical forces, thereby enabling a sufficient number of silica microcapsules (oil-containing microcapsules) to be doped into the polymer matrix material.

[0058] Optionally, in step S001, the organic solvent includes at least one of ethanol, acetone, and petroleum ether. The mass ratio of the organic solvent to the polymer matrix material is 100:(1-10). The amount of the polymer matrix material added to the organic solvent should not be too much. When the amount of the polymer matrix material added is too much, the polymer matrix material will agglomerate, which will affect the friction performance of the polymer matrix material.

[0059] The present invention also provides a silica microcapsule doped water-lubricated bearing material, which is prepared by the above-mentioned preparation method of the silica microcapsule doped water-lubricated bearing material. The provided silica microcapsule doped water-lubricated bearing material has excellent water lubrication and mechanical properties. During the material friction process, the silica microcapsule can release the internal lubricating medium, promote the formation of the hydrated lubricating layer on the dual surface, separate the dual surface roughness peaks, thereby reducing the interface shear stress, reducing the friction coefficient of the material, and extending the service life of the water-lubricated bearing, so that the water-lubricated bearing material can be used under low-speed water-poor conditions.

[0060] In order to further illustrate the silica microcapsule-doped water-lubricated bearing material and preparation method provided by the present invention, the following examples and comparative examples are provided. Example 1

[0061] This embodiment provides a method for preparing a silica microcapsule-doped water-lubricated bearing material, comprising the following steps:

[0062] S001. Add 3g of polyetheretherketone powder and 0.03g of hollow silica particles to a beaker, add 100g of ethanol to the beaker, and use a high-speed homogenizer to mix the polyetheretherketone powder and the hollow silica particles evenly; after mixing, filter the mixed material to remove the ethanol in the material; after filtration, put the mixed material into an oven at 80°C for drying;

[0063] S002. The mixed material in step S001 is filled into a mold and cold pressed. The cold pressing pressure is 10MPa and the temperature is 25°C.

[0064] S003. After the cold pressing is completed, the formed material is placed in a muffle furnace for sintering at a temperature of 360°C and a sintering time of 5 hours;

[0065] S004. After sintering, the sintered material is placed in lubricating oil for 2 hours in a vacuum drying oven so that the lubricating oil is absorbed into the hollow silica particles;

[0066] S005. The sintered material is taken out from the lubricating oil, and the surface of the sintered material is cleaned to obtain a silica microcapsule-doped water-lubricated bearing material. Example 2

[0067] This embodiment provides a method for preparing a silica microcapsule-doped water-lubricated bearing material, comprising the following steps:

[0068] S001. Add 3g of sulfonated polyetheretherketone powder and 0.15g of hollow silica particles to a beaker, add 100g of ethanol to the beaker, and use a high-speed homogenizer to mix the sulfonated polyetheretherketone powder and the hollow silica particles evenly; after mixing, filter the mixed material to remove the ethanol in the material; after filtration, dry the mixed material in an oven at 80°C;

[0069] S002. The mixed material in step S001 is filled into a mold and cold pressed. The cold pressing pressure is 100MPa and the temperature is 25°C.

[0070] S003. After the cold pressing is completed, the formed material is placed in a muffle furnace for sintering at a temperature of 370°C and a sintering time of 4 hours;

[0071] S004. After sintering, the sintered material is placed in lubricating oil for 2 hours in a vacuum drying oven so that the lubricating oil is absorbed into the hollow silica particles;

[0072] S005. The sintered material is taken out from the lubricating oil, and the surface of the sintered material is cleaned to obtain a silica microcapsule-doped water-lubricated bearing material. Example 3

[0073] This embodiment provides a method for preparing a silica microcapsule-doped water-lubricated bearing material, comprising the following steps:

[0074] S001. Add 3g of polyetheretherketone powder and 0.3g of hollow silica particles to a beaker, add 100g of acetone to the beaker, and use a high-speed homogenizer to mix the polyetheretherketone powder and the hollow silica particles evenly; after mixing, filter the mixed material to remove the acetone in the material; after filtration, put the mixed material into an oven at 80°C for drying;

[0075] S002. The mixed material in step S001 is filled into a mold and cold pressed. The cold pressing pressure is 80MPa and the temperature is 30°C.

[0076] S003. After the cold pressing is completed, the formed material is placed in a muffle furnace for sintering at a temperature of 380°C and a sintering time of 4 hours;

[0077] S004. After sintering, the sintered material is placed in lubricating oil for 2 hours in a vacuum drying oven so that the lubricating oil is absorbed into the hollow silica particles;

[0078] S005. The sintered material is taken out from the lubricating oil, and the surface of the sintered material is cleaned to obtain a silica microcapsule-doped water-lubricated bearing material. Example 4

[0079] This embodiment provides a method for preparing a silica microcapsule-doped water-lubricated bearing material, comprising the following steps:

[0080] S001. Add 3g of polyetheretherketone powder and 0.42g of hollow silica particles to a beaker, add 100g of petroleum ether to the beaker, and use a high-speed homogenizer to mix the polyetheretherketone powder and hollow silica particles evenly; after mixing, filter the mixed material to remove the petroleum ether in the material; after filtering, put the mixed material into an oven at 80°C for drying;

[0081] S002. The mixed material in step S001 is filled into a mold and cold pressed. The cold pressing pressure is 120MPa and the temperature is 25°C.

[0082] S003. After the cold pressing is completed, the formed material is placed in a muffle furnace for sintering at a temperature of 370°C and a sintering time of 4 hours;

[0083] S004. After sintering, the sintered material is placed in hydrophilic silicone oil for 2 hours in a vacuum drying oven so that the hydrophilic silicone oil is absorbed into the hollow silica particles;

[0084] S005. The sintered material is taken out from the hydrophilic silicone oil, and the surface of the sintered material is cleaned to obtain a silica microcapsule-doped water-lubricated bearing material.

[0085] Comparative Example 1

[0086] This comparative example provides a method for preparing a hollow silica-doped water-lubricated bearing material, comprising the following steps:

[0087] D001. Add 3g of polyetheretherketone powder and 0.06g of hollow silica particles into a beaker, add 100g of ethanol into the beaker, and use a high-speed homogenizer to mix the polyetheretherketone powder and the hollow silica particles evenly; after the mixing is completed, filter the mixed material to remove the ethanol in the material; after the filtration is completed, put the mixed material into an oven at 80°C to dry;

[0088] D002. The mixed material in step D001 is filled into a mold and cold pressed. The cold pressing pressure is 10MPa and the temperature is 25°C.

[0089] D003. After the cold pressing is completed, the formed material is placed in a muffle furnace for sintering to obtain a hollow silica-doped water-lubricated bearing material, wherein the sintering temperature is 360°C and the sintering time is 5 hours.

[0090] Comparative Example 2

[0091] This comparative example provides a method for preparing a polyetheretherketone material, comprising the following steps:

[0092] D001. 3 g of polyetheretherketone powder was filled into a mold and cold pressed at a pressure of 10 MPa and a temperature of 25°C;

[0093] D002. After the cold pressing is completed, the formed material is placed in a muffle furnace for sintering to obtain polyetheretherketone material, wherein the sintering temperature is 370°C and the sintering time is 4 hours.

[0094] The friction performance of the silica microcapsule-doped water-lubricated bearing material prepared in Examples 1 to 4, the hollow silica-doped water-lubricated bearing material prepared in Comparative Example 1, and the polyetheretherketone material prepared in Comparative Example 2 were tested using a UMT rotary friction and wear tester. The test conditions were: speed 100 rpm, load 15 N, gyration radius 5 mm, and 3% sodium chloride solution was selected as the test environment. The test results are as follows: Figure 2 And as shown in Table 1.

[0095] Table 1:

[0096] Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 0.055 0.040 0.050 0.080 0.100 0.120

[0097] Among them, Table 1 shows the friction coefficient values ​​of the silica microcapsule-doped water-lubricated bearing materials prepared in Examples 1 to 4, the hollow silica-doped water-lubricated bearing materials prepared in Comparative Example 1, and the polyetheretherketone material prepared in Comparative Example 2 under test conditions. Figure 2 The friction coefficient curves of the water-lubricated bearing materials doped with silica microcapsules prepared in Examples 1 to 4 are shown. From the friction coefficient values ​​provided in Table 1, it can be seen that as the amount of hollow silica particles added relative to the polymer matrix material (polyetheretherketone or sulfonated modified polyetheretherketone) gradually increases, the friction coefficient value of the water-lubricated bearing materials doped with silica microcapsules first decreases and then increases. This is because a small amount of silica microcapsules doped with the polymer matrix material can effectively promote the formation of a lubricating film at the interface (dual surface), while an excessive amount of silica microcapsules will agglomerate, making it easier for the particles to be peeled off from the polymer matrix material.

[0098] The wear scar morphology of the silica microcapsule-doped water-lubricated bearing materials prepared in Examples 1 to 3 after the friction performance test was completed was observed using a three-dimensional confocal microscope. Figure 3 .from Figure 3 It can be seen that as the amount of hollow silica particles added compared to the polymer matrix material (polyetheretherketone or sulfonated modified polyetheretherketone) gradually increases, the degree of wear in the central area of ​​the material decreases; while the degree of wear of the silica microcapsule-doped water-lubricated bearing material prepared in Example 3 increases. This is because the amount of hollow silica particles added increases, the particles agglomerate, resulting in more pits in the sample, the surface roughness increases significantly, the particles are easier to peel off, and the degree of wear increases.

[0099] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for preparing a water-lubricated bearing material doped with silica microcapsules, characterized in that: The following steps are involved: S001. The polymer matrix material and the hollow silica particles are mixed evenly; S002. The mixed material in step S001 is filled into a mold and cold pressed; S003. After the cold pressing is completed, the formed material is placed in a muffle furnace for sintering; S004. After sintering, the sintered material is placed in a lubricating medium, and the lubricating medium is placed in a vacuum drying oven so that the lubricating medium is sucked into the hollow silica particles; S005. The sintered material is removed from the lubricating medium, and the surface of the sintered material is washed after removal to obtain a water-lubricated bearing material doped with silica microcapsules; In step S001, the polymer matrix material is polyetheretherketone or sulfonated modified polyetheretherketone; In step S001, the mass ratio of the hollow silica particles to the polymer matrix material is (0.5-14):100; Step S001 includes: Add the polymer matrix material and hollow silica particles into a beaker; Add an organic solvent into a beaker, and use a high-speed homogenizer to mix the polymer matrix material and the hollow silica particles uniformly; After the mixing is completed, the mixed material is filtered to remove the organic solvent in the material; After the filtration is completed, the evenly mixed material is placed in an oven for drying.

2. The method for preparing a water-lubricated bearing material doped with silica microcapsules according to claim 1, characterized in that: In step S001, the particle size D of the hollow silica particles is 20-30 um.

3. The method for preparing a water-lubricated bearing material doped with silica microcapsules according to claim 1, characterized in that: In step S001, the organic solvent includes at least one of ethanol, acetone, and petroleum ether, and the mass ratio of the organic solvent to the polymer matrix material is 100:(1-10).

4. The method for preparing a water-lubricated bearing material doped with silica microcapsules according to claim 1, characterized in that: In step S003, the sintering temperature is 360-380°C, and the sintering time is 4-5 hours.

5. The method for preparing a water-lubricated bearing material doped with silica microcapsules according to claim 1, characterized in that: In step S004, the lubricating medium includes at least one of lubricating oil and hydrophilic silicone oil, and the temperature in the vacuum drying oven is 55-65°C.

6. The method for preparing a water-lubricated bearing material doped with silica microcapsules according to claim 1, characterized in that: In step S005, the surface of the taken-out sintered material is cleaned with ethanol.

7. A silica microcapsule doped water-lubricated bearing material, characterized in that: The material is made by the preparation method of the silica microcapsule doped water-lubricated bearing material according to any one of claims 1 to 6.

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