CN115572409B - Method for improving wear resistance of porous retainer material of oil-retaining bearing - Google Patents
Method for improving wear resistance of porous retainer material of oil-retaining bearing Download PDFInfo
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Abstract
The invention belongs to the technical field of bearing protection, and provides a method for improving wear resistance of a porous retainer material of an oil-retaining bearing. According to the invention, polydopamine is generated in the bearing porous retainer material through oxidation self-polymerization reaction; as the surface of the polydopamine has a large number of active groups such as phenolic hydroxyl groups, amino groups and the like, the polydopamine can generate hydrolysis reaction with silicon-oxygen bonds in the vinyl silane coupling agent, and double bonds (vinyl) are introduced on the surface of the porous retainer material of the bearing. According to the invention, the vinyl double-end-capped polydimethylsiloxane and the cross-linking agent in the oleogel prepolymer are subjected to hydrosilylation reaction under the action of the catalyst to generate a three-dimensional skeleton pore structure, the three-dimensional skeleton pore structure also has lipophilicity, lubricating oil can be firmly anchored in the three-dimensional skeleton pore structure to form oleogel, and the existence of the oleogel can improve the lubricity and bearing capacity of the porous retainer material of the bearing, reduce the friction coefficient of the porous retainer material of the bearing and improve the wear resistance.
Description
Technical Field
The invention relates to the technical field of bearing protection, in particular to a method for improving wear resistance of a porous retainer material of an oil-retaining bearing.
Background
The porous retainer of the oil-containing bearing can realize the storage of lubricating oil by utilizing the internal pore structure of the porous retainer, can realize self-circulation type oil storage and supply on the premise of not needing external oil supply equipment, has the characteristics of high precision, high reliability, long service life and no maintenance, and has important application in the fields of aviation, aerospace, high-end equipment and the like.
However, due to the inevitable frictional wear occurring during the operation of the bearing, blackening of wear occurs at the pockets and guide surfaces of the porous retainer of the oil-impregnated bearing, which is mainly due to the existence of the pore structure, so that the porous retainer of the oil-impregnated bearing is subjected to larger stress concentration in contact with the balls and the inner and outer rings, resulting in wear of the porous retainer of the oil-impregnated bearing and carbonization of the lubricating oil, and when the wear occurs to a certain extent, not only is the unstable operation of the bearing affected the bearing precision, but also excessive oil sludge further worsens the lubrication state of the bearing, resulting in failure of the bearing. Therefore, it is important to solve the problem of wear of the porous cage of the oil bearing.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method for improving the wear resistance of a porous cage material for an oil-impregnated bearing. The method provided by the invention can improve the abrasion performance of the porous retainer material of the oil-retaining bearing.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a method for improving the wear resistance of a porous retainer material of an oil-retaining bearing, which comprises the following steps:
soaking a porous bearing retainer material in a dopamine hydrochloride solution, and performing oxidation self-polymerization reaction to obtain a porous bearing retainer material coated with polydopamine;
immersing the bearing porous retainer material coated with polydopamine in a vinyl silane coupling agent solution, and performing grafting reaction to obtain a bearing porous retainer material with surface grafted double bonds;
the bearing porous retainer material with the double bonds grafted on the surface is immersed in the oil gel prepolymer and then subjected to curing reaction, so that the wear resistance of the bearing porous retainer material is improved;
the oleogel prepolymer comprises an oleogel body and a catalyst; the oil gel main body comprises lubricating oil, vinyl double-end-capped polydimethylsiloxane and a cross-linking agent;
the catalyst is a hydrosilylation catalyst.
Preferably, the concentration of the dopamine hydrochloride solution is 1-5 g/L; the time of the oxidation self-polymerization reaction is 12-24 hours.
Preferably, the vinyl silane coupling agent in the vinyl silane coupling agent solution comprises one or more of methacryloxypropyl triisopropoxy silane, dimethylethoxyformyloxy silane and vinyl triisopropoxy silane.
Preferably, the mass concentration of the vinyl silane coupling agent solution is 1-10%; the grafting reaction time is 1-5 h.
Preferably, the molecular weight of the vinyl double-end-capped polydimethylsiloxane is 500-50000 g/mol.
Preferably, the cross-linking agent comprises a silane containing at least three silicon hydrogen bonds.
Preferably, the cross-linking agent comprises tetra (dimethylsiloxy) silane.
Preferably, the hydrosilylation catalyst comprises one or more of a platinum-vinyl siloxane complex, a rhodium-vinyl siloxane complex, and a palladium-vinyl siloxane complex.
Preferably, the mass fraction of the lubricating oil in the oleogel main body is 30-70%, and the total mass fraction of the vinyl double-end-capped polydimethylsiloxane and the cross-linking agent is 70-30%; the molar ratio of the silicon-hydrogen group in the cross-linking agent to the double bond in the vinyl double-end-capped polydimethylsiloxane is 1: 1-2: 1, a step of;
the mass content of the hydrosilylation catalyst in the oleogel prepolymer is 0.5-10 ppm in terms of transition metal atoms.
Preferably, the temperature of the curing reaction is 70-90 ℃ and the time is 12-24 h.
The invention provides a method for improving the wear resistance of a porous retainer material of an oil-retaining bearing, which comprises the following steps: soaking a porous bearing retainer material in a dopamine hydrochloride solution, and performing oxidation self-polymerization reaction to obtain a porous bearing retainer material coated with polydopamine; immersing the bearing porous retainer material coated with polydopamine in a vinyl silane coupling agent solution, and performing grafting reaction to obtain a bearing porous retainer material with surface grafted double bonds; the bearing porous retainer material with the double bonds grafted on the surface is immersed in the oil gel prepolymer and then subjected to curing reaction, so that the wear resistance of the bearing porous retainer material is improved; the oleogel prepolymer comprises an oleogel body and a catalyst; the oil gel main body comprises lubricating oil, vinyl double-end-capped polydimethylsiloxane and a cross-linking agent; the catalyst is a hydrosilylation catalyst.
According to the method, polydopamine is generated in the porous retainer material of the bearing through oxidation self-polymerization reaction and is adhered to the surface of the porous retainer material of the bearing; the polydopamine surface has a large number of phenolic hydroxyl groups and amino groups, so that the polydopamine has strong adhesion performance and can be well adhered to a bearing porous retainer material. In addition, the bearing porous retainer material with the polydopamine layer adhered to the surface takes a large amount of phenolic hydroxyl groups and amino groups of polydopamine as a secondary reaction platform to generate hydrolysis reaction with silicon-oxygen bonds in the vinyl silane coupling agent, and double bonds (vinyl groups) are introduced to the surface of the bearing porous retainer material. The oleogel prepolymer of the invention comprises an oleogel body and a catalyst; the oil gel main body comprises lubricating oil, vinyl double-end-capped polydimethylsiloxane and a cross-linking agent; the catalyst is a hydrosilylation catalyst; under the action of a catalyst, the vinyl double-end-capped polydimethylsiloxane and the cross-linking agent undergo hydrosilylation reaction to generate a three-dimensional framework pore structure, and the three-dimensional framework pore structure has excellent lipophilicity and can firmly anchor lubricating oil in the three-dimensional framework pore structure to form oil gel; meanwhile, in the curing process of the oil gel, double bonds on the surface of the bearing porous retainer material grafted with double bonds participate in the gelation reaction, so that the oil gel is connected with the surface of the porous retainer through covalent bonds, and the oil gel layer can be stably and firmly combined on the pore surfaces of the bearing porous retainer material. The existence of the oil gel can improve the lubricity and bearing capacity of the porous retainer material of the bearing, and can serve as a boundary lubricating layer in the friction process to avoid direct contact between the porous retainer material of the bearing and metal pairs, so that the friction coefficient of the porous retainer material of the bearing is reduced, the wear resistance is improved, and the bearing porous retainer material has an important role in prolonging the service life of the porous retainer material of the bearing and improving the running precision and reliability of the bearing. The method is simple and convenient to operate, and realizes low friction and high wear resistance of the porous retainer material of the bearing on the premise of not changing the internal pore structure of the porous retainer material of the bearing and not reducing the mechanical strength of the porous retainer material of the bearing.
Detailed Description
The invention provides a method for improving the wear resistance of a porous retainer material of an oil-retaining bearing, which comprises the following steps:
soaking a porous bearing retainer material in a dopamine hydrochloride solution, and performing oxidation self-polymerization reaction to obtain a porous bearing retainer material coated with polydopamine;
immersing the bearing porous retainer material coated with polydopamine in a vinyl silane coupling agent solution, and performing grafting reaction to obtain a bearing porous retainer material with surface grafted double bonds;
the bearing porous retainer material with the double bonds grafted on the surface is immersed in the oil gel prepolymer and then subjected to curing reaction, so that the wear resistance of the bearing porous retainer material is improved;
the oleogel prepolymer comprises an oleogel body and a catalyst; the oil gel main body comprises lubricating oil, vinyl double-end-capped polydimethylsiloxane and a cross-linking agent;
the catalyst is a hydrosilylation catalyst.
In the present invention, the raw materials used in the present invention are preferably commercially available products unless otherwise specified.
According to the invention, the porous bearing retainer material is immersed in a dopamine hydrochloride solution, and oxidation self-polymerization reaction is carried out, so that the porous bearing retainer material coated with polydopamine is obtained.
In the present invention, the bearing porous retainer material is preferably subjected to pretreatment prior to improving the wear resistance of the oil-impregnated bearing porous retainer material; the pretreatment preferably includes washing and drying; the cleaning agent preferably comprises petroleum ether; the cleaning agent and the dosage of the cleaning agent are not particularly limited, and the cleaning agent can clean pollutants such as grease on the surface of the porous retainer material of the bearing.
In the present invention, the bearing porous cage material preferably comprises a porous polyimide material and/or a porous phenolic laminated cloth material.
In the invention, the solvent of the dopamine hydrochloride solution is preferably Tris-HCl buffer solution; the pH of the Tris-HCl buffer is preferably 8.5. In the present invention, the concentration of the dopamine hydrochloride solution is preferably 1 to 5g/L, more preferably 2 to 4g/L, and still more preferably 2.5 to 3g/L.
In the present invention, the temperature of the oxidative self-polymerization reaction is preferably room temperature, i.e., neither additional heating nor additional cooling is required; the time of the oxidative self-polymerization reaction is preferably 12 to 24 hours.
After the oxidation self-polymerization reaction, the present invention preferably further includes washing and drying the bearing porous cage material subjected to the oxidation self-polymerization reaction.
The dopamine hydrochloride generates polydopamine through oxidation self-polymerization, and is adhered to the surface of the porous retainer material of the bearing. The polydopamine surface contains a large number of active groups of phenolic hydroxyl and amino, so that the polydopamine has strong adhesion performance and can be well adhered to the surface of the porous retainer material of the bearing.
After the porous bearing retainer material coated with polydopamine is obtained, the porous bearing retainer material coated with polydopamine is immersed in a vinyl silane coupling agent solution for grafting reaction, and the porous bearing retainer material with double bonds grafted on the surface is obtained.
In the present invention, the vinyl silane coupling agent in the vinyl silane coupling agent solution preferably includes one or more of methacryloxypropyl triisopropoxy silane, dimethylethoxyformyloxy silane, and vinyl triisopropoxy silane. In the present invention, the solvent of the vinyl silane coupling agent solution preferably includes ethanol. In the present invention, the mass concentration of the vinyl silane coupling agent solution is preferably 1 to 10%, more preferably 2 to 8%, and still more preferably 4 to 6%.
In the present invention, the temperature of the grafting reaction is preferably room temperature, i.e., neither additional heating nor additional cooling is required; the time of the grafting reaction is preferably 1 to 5 hours.
After the grafting reaction, the invention preferably further comprises washing and drying the bearing porous retainer material subjected to the grafting reaction.
According to the invention, the porous bearing retainer material coated with polydopamine is immersed in a vinyl silane coupling agent solution, and a large number of active groups phenolic hydroxyl groups and amino groups of polydopamine are used as a secondary reaction platform to perform hydrolysis reaction with silicon-oxygen bonds in the vinyl silane coupling agent, so that double bonds (vinyl groups) are introduced to the surface of the porous bearing retainer material.
After the bearing porous retainer material with the surface grafted with double bonds is obtained, the bearing porous retainer material with the surface grafted with double bonds is immersed in the oil gel prepolymer and then subjected to curing reaction, so that the wear resistance of the oil-containing bearing porous retainer material is improved.
In the present invention, the oleogel prepolymer includes an oleogel body and a catalyst.
In the present invention, the oleogel body comprises lubricating oil, vinyl bis-blocked polydimethylsiloxane and a cross-linking agent. In the present invention, the lubricating oil is preferably a commercial lubricating oil; the type of the lubricating oil is preferably selected according to the working condition. In the present invention, the molecular weight of the vinyl double-ended polydimethylsiloxane is preferably 500 to 50000g/mol. In the present invention, the crosslinking agent preferably includes silane, which preferably contains at least three silicon hydrogen bonds; the cross-linking agent preferably comprises tetra (dimethylsiloxy) silane. In the invention, the mass fraction of the lubricating oil in the oil gel main body is preferably 30-70%, and the total mass fraction of the vinyl double-end-capped polydimethylsiloxane and the cross-linking agent is preferably 70-30%; the molar ratio of the hydrosilylation radical in the crosslinker to the double bond in the vinyl-bis-blocked polydimethylsiloxane is preferably 1: 1-2: 1.
in the invention, the catalyst is a hydrosilylation catalyst; the hydrosilylation catalyst preferably comprises a transition metal. In the present invention, the hydrosilylation catalyst preferably comprises one or more of a platinum-vinyl siloxane complex, a rhodium-vinyl siloxane complex, and a palladium-vinyl siloxane complex. In the present invention, the mass content of the hydrosilylation catalyst in the oil gel prepolymer is preferably 0.5 to 10ppm in terms of transition metal atoms.
In the present invention, the preparation method of the oleogel prepolymer preferably includes the steps of:
mixing lubricating oil, vinyl double-end-capped polydimethylsiloxane and a cross-linking agent to obtain an oil gel main body;
and mixing the oil gel main body with a catalyst to obtain the oil gel prepolymer.
In the present invention, the mixing of the lubricating oil, the vinyl bis-blocked polydimethylsiloxane and the crosslinking agent and the mixing of the oleogel body and the catalyst are all preferably performed under stirring.
In the present invention, the impregnation time of the bearing porous cage material with surface grafted double bonds in the oleogel prepolymer is preferably 1 to 5min, more preferably 2 to 4min.
The invention preferably further comprises removing the oil gel prepolymer impregnated bearing porous cage material prior to the curing reaction.
In the present invention, the temperature of the curing reaction is preferably 70 to 90 ℃, and more preferably 80 ℃; the time is preferably 12 to 24 hours.
According to the invention, the vinyl double-end-capped polydimethylsiloxane and the cross-linking agent in the oleogel prepolymer are subjected to hydrosilylation reaction under the action of the catalyst to generate a three-dimensional skeleton pore structure, the three-dimensional skeleton pore structure has excellent lipophilicity, lubricating oil can be firmly anchored in the three-dimensional skeleton pore structure to form oleogel, the existence of the oleogel can improve the lubricity and bearing capacity of the porous bearing retainer material, and can serve as a boundary lubricating layer in the friction process to avoid direct contact between the porous bearing retainer material and metal pairs, so that the friction coefficient of the porous bearing retainer material is reduced, the wear resistance is improved, and the method has an important effect of prolonging the service life of the porous bearing retainer material and improving the running precision and reliability of the bearing. Meanwhile, in the curing process of the oil gel, double bonds on the surface of the bearing porous retainer material grafted with double bonds participate in the gelation reaction, so that the oil gel is connected with the surface of the porous retainer through covalent bonds, and the oil gel layer can be stably and firmly combined on the pore surfaces of the bearing porous retainer material. The method is simple and convenient to operate, and improves the low friction and high wear resistance of the porous retainer material of the bearing on the premise of not changing the internal pore structure of the porous retainer material of the bearing and not reducing the mechanical strength of the porous retainer material of the bearing.
The method of improving the wear resistance of porous retainer materials for oil-impregnated bearings provided by the present invention will be described in detail with reference to examples, but they should not be construed as limiting the scope of the invention.
Example 1
(1) Placing the cleaned and dried porous polyimide retainer material into 50mL of Tris-HCl buffer solution (pH value is 8.5), adding 125mg of dopamine hydrochloride, stirring at normal temperature for reaction for 24 hours, taking out, cleaning and drying to obtain the bearing porous retainer material coated with polydopamine; and then immersing the bearing porous retainer material coated with polydopamine into a methacryloxypropyl triisopropoxysilane ethanol solution with the concentration of 5wt percent, reacting for 2 hours, taking out, cleaning and drying to obtain the bearing porous retainer material with the surface grafted with double bonds.
(2) 20.0g of vinyl double-end-capped polydimethylsiloxane with molecular weight of 17200g/mol, 20.2g of PAO-4 base oil and 0.2g of tetra (dimethylsiloxy) silane are taken, and after being uniformly mixed, 8.1mg of platinum-vinyl siloxane complex catalyst (SiP 6830.05, gelest, the mass content of platinum is 0.5%) is added, and after being uniformly mixed, an oil gel prepolymer is obtained. Immersing the bearing porous retainer material with the double bonds grafted on the surface into the oleogel prepolymer, taking out after 2min, then placing the bearing porous retainer material in an oven at 80 ℃, and preserving heat for 24h to obtain the porous polyimide retainer material with the oleogel layer grafted on the surface.
Example 2
(1) The porous bearing cage material with double bonds grafted on the surface was prepared as in example 1.
(2) 20.0g of vinyl double-end-capped polydimethylsiloxane with molecular weight of 800g/mol, 24.1g of PAO-4 base oil and 4.1g of tetra (dimethylsiloxy) silane are taken, 9.6mg of platinum-vinyl siloxane complex (SiP 6830.05, gelest, mass content of platinum is 0.5%) is added after being uniformly mixed, and the oil gel prepolymer is obtained after being uniformly mixed. Immersing the bearing porous retainer material with the double bonds grafted on the surface into the oleogel prepolymer, taking out after 1min, then placing the bearing porous retainer material in an oven at 80 ℃, and preserving heat for 24h to obtain the porous polyimide retainer material with the oleogel layer grafted on the surface.
Example 3
(1) Preparation of bearing porous cage material with double bond grafted on surface is the same as in example 1;
(2) Taking and uniformly mixing 20.0g of vinyl double-end-capped polydimethylsiloxane with the molecular weight of 9400g/mol, 20.4g of PAO-4 base oil and 0.4g of tetra (dimethylsiloxy) silane, adding 8.2mg of platinum-vinyl siloxane complex (SiP 6830.05, gelest, and the mass content of platinum is 0.5%), and uniformly mixing to obtain the oil gel prepolymer. Immersing the bearing porous retainer material with the double bonds grafted on the surface into the oleogel prepolymer, taking out after 1min, then placing the bearing porous retainer material in an oven at 80 ℃, and preserving heat for 24h to obtain the porous polyimide retainer material with the oleogel layer grafted on the surface.
Example 4
(1) Preparation of bearing porous cage material with double bond grafted on surface is the same as in example 1;
(2) 20.0g of vinyl double-end-capped polydimethylsiloxane with molecular weight of 49500g/mol, 20.07g of PAO-4 base oil and 0.07g of tetra (dimethylsiloxy) silane are taken, and after being uniformly mixed, 8.0mg of platinum-vinyl siloxane complex (SiP 6830.05, gelest, the mass content of platinum is 0.5%) is added, and after being uniformly mixed, the oleogel prepolymer is obtained. Immersing the bearing porous retainer material with the double bonds grafted on the surface into the oleogel prepolymer, taking out after 3min, then placing the bearing porous retainer material in an oven at 80 ℃, and preserving heat for 24h to obtain the porous polyimide retainer material with the oleogel layer grafted on the surface.
Example 5
(1) Preparation of bearing porous cage material with double bond grafted on surface is the same as in example 1;
(2) 20.0g of vinyl double-end-capped polydimethylsiloxane with molecular weight of 17200g/mol, 8.7g of PAO-4 base oil and 0.2g of tetra (dimethylsiloxy) silane are taken, evenly mixed, and then 5.8mg of platinum-vinyl siloxane complex (SiP 6830.05, gelest, the mass content of platinum is 0.5%) is added, and evenly mixed, thus obtaining the oleogel prepolymer. Immersing the bearing porous retainer material with the double bonds grafted on the surface into the oleogel prepolymer, taking out after 2min, then placing the bearing porous retainer material in an oven at 80 ℃, and preserving heat for 24h to obtain the porous polyimide retainer material with the oleogel layer grafted on the surface.
Example 6
(1) Preparation of bearing porous cage material with double bond grafted on surface is the same as in example 1;
(2) 20.0g of vinyl double-end-capped polydimethylsiloxane with molecular weight of 17200g/mol, 47.1g of PAO-4 base oil and 0.2g of tetra (dimethylsiloxy) silane are taken, and after being uniformly mixed, 13.5mg of platinum-vinyl siloxane complex (SiP 6830.05, gelest, the mass content of platinum is 0.5%) is added, and after being uniformly mixed, the oleogel prepolymer is obtained. Immersing the bearing porous retainer material with the double bonds grafted on the surface into the oleogel prepolymer, taking out after 2min, then placing the bearing porous retainer material in an oven at 80 ℃, and preserving heat for 24h to obtain the porous polyimide retainer material with the oleogel layer grafted on the surface.
Example 7
The porous polyimide cage material in step (1) of example 1 was replaced with a porous bakelite cage material, and the remaining steps were the same.
Comparative example 1
The porous polyimide cage material prepared in step (1) of example 1 was subjected to performance test without any treatment, in comparison with example 1.
Comparative example 2
The prepared phenolic aldehyde bakelite retainer material of step (1) of example 7 was subjected to performance test without any treatment, compared with example 7.
The modified porous polyimide retainer material, the modified porous bakelite retainer material and the unmodified porous retainer material prepared in the examples and the comparative examples are subjected to tribological performance tests respectively, and the test steps are as follows:
(1) The porous cage material of the bearing (modified porous polyimide cage material, modified porous bakelite cage material and unmodified porous cage material prepared in examples and comparative examples) was impregnated with the lubricating oil PAO4 at 100 ℃ under vacuum conditions for 24 hours.
(2) After the oil-containing bearing porous retainer material is wiped off the surface oil slick, friction and wear performance test is carried out, the test equipment is a CSM friction and wear tester, the test load is 5N, the test speed is 0.15m/s, and the test time is 2h. The friction coefficient is directly read by equipment, the abrasion width is measured by a three-dimensional surface profiler, the volumetric abrasion rate is calculated, and each sample is measured for three times to obtain the average value.
The test results are shown in Table 1.
Table 1 results of friction performance test of the cage obtained in examples and comparative examples
As can be seen from table 1: compared with the unmodified porous retainer material, the friction coefficient and the volume abrasion rate of the modified porous retainer material are obviously reduced, wherein the friction coefficient and the volume abrasion rate of the porous polyimide retainer material of the embodiment 3 are respectively reduced by 70 percent and 93.3 percent, and the friction coefficient and the volume abrasion rate of the porous phenolic aldehyde bakelite retainer material of the embodiment 7 are respectively reduced by 72.7 percent and 93.1 percent.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (10)
1. A method for improving the wear resistance of a porous cage material of an oil-impregnated bearing, comprising the steps of:
soaking a porous bearing retainer material in a dopamine hydrochloride solution, and performing oxidation self-polymerization reaction to obtain a porous bearing retainer material coated with polydopamine;
immersing the bearing porous retainer material coated with polydopamine in a vinyl silane coupling agent solution, and performing grafting reaction to obtain a bearing porous retainer material with surface grafted double bonds;
the bearing porous retainer material with the double bonds grafted on the surface is immersed in the oil gel prepolymer and then subjected to curing reaction, so that the wear resistance of the bearing porous retainer material is improved;
the oleogel prepolymer comprises an oleogel body and a catalyst; the oil gel main body comprises lubricating oil, vinyl double-end-capped polydimethylsiloxane and a cross-linking agent;
the catalyst is a hydrosilylation catalyst.
2. The method according to claim 1, wherein the concentration of the dopamine hydrochloride solution is 1-5 g/L; the time of the oxidation self-polymerization reaction is 12-24 hours.
3. The method of claim 1, wherein the vinyl silane coupling agent in the vinyl silane coupling agent solution comprises one or more of methacryloxypropyl triisopropoxy silane, dimethylethoxyformyloxy silane, and vinyl triisopropoxy silane.
4. A method according to claim 1 or 3, wherein the mass concentration of the vinyl silane coupling agent solution is 1 to 10%; the grafting reaction time is 1-5 h.
5. The method according to claim 1, wherein the vinyl bis-blocked polydimethylsiloxane has a molecular weight of 500 to 50000g/mol.
6. The method of claim 1, wherein the cross-linking agent comprises a silane, the silane containing at least three silicon hydrogen bonds.
7. The method of claim 6, wherein the cross-linking agent comprises tetra (dimethylsiloxy) silane.
8. The method of claim 1, wherein the hydrosilylation catalyst comprises one or more of a platinum-vinyl siloxane complex, a rhodium-vinyl siloxane complex, and a palladium-vinyl siloxane complex.
9. The method of claim 1, 5, 6, 7 or 8, wherein the oil gel body comprises 30% to 70% of the lubricating oil by mass and the total mass of vinyl bis-blocked polydimethylsiloxane and crosslinker is 70% to 30%; the molar ratio of the silicon-hydrogen group in the cross-linking agent to the double bond in the vinyl double-end-capped polydimethylsiloxane is 1: 1-2: 1, a step of;
the mass content of the hydrosilylation catalyst in the oleogel prepolymer is 0.5-10 ppm in terms of transition metal atoms.
10. The method according to claim 1, wherein the curing reaction is carried out at a temperature of 70 to 90 ℃ for a time of 12 to 24 hours.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0988960A (en) * | 1995-07-14 | 1997-03-31 | Ntn Corp | Porous oil retaining bearing |
| EP1676903A2 (en) * | 2004-12-01 | 2006-07-05 | Gebrüder Reinfurt GmbH & Co. KG | Cage for a rolling element bearing |
| CN1965171A (en) * | 2004-06-07 | 2007-05-16 | Ntn株式会社 | Retainer for rolling bearing, and rolling bearing |
| CN114149842A (en) * | 2021-12-10 | 2022-03-08 | 中国科学院兰州化学物理研究所 | Porous oil-containing intelligent lubricating material and preparation method and application thereof |
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- 2022-11-04 CN CN202211374382.5A patent/CN115572409B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0988960A (en) * | 1995-07-14 | 1997-03-31 | Ntn Corp | Porous oil retaining bearing |
| CN1965171A (en) * | 2004-06-07 | 2007-05-16 | Ntn株式会社 | Retainer for rolling bearing, and rolling bearing |
| EP1676903A2 (en) * | 2004-12-01 | 2006-07-05 | Gebrüder Reinfurt GmbH & Co. KG | Cage for a rolling element bearing |
| CN114149842A (en) * | 2021-12-10 | 2022-03-08 | 中国科学院兰州化学物理研究所 | Porous oil-containing intelligent lubricating material and preparation method and application thereof |
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| Title |
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| 多孔聚酰亚胺保持架对轴承贫油润滑性能研究;赵华俊;王晓雷;黄巍;;机械制造与自动化(第03期);全文 * |
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