CN113214550A - Water-lubricated bearing composite material and preparation method thereof - Google Patents
Water-lubricated bearing composite material and preparation method thereof Download PDFInfo
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Abstract
The invention provides a water-lubricated bearing composite material and a preparation method thereof, belonging to the technical field of composite materials. The method comprises the following steps: mixing toluene diisocyanate and polytetramethylene glycol for addition reaction to obtain a PU prepolymer; mixing the PU prepolymer, epoxy resin and a first organic solvent to obtain a first mixture; mixing nitrile butadiene rubber with a second organic solvent to obtain a nitrile butadiene rubber solution; mixing the first mixture, a nitrile rubber solution, an additive, a vulcanization aid, an anti-aging agent D, a vulcanizing agent and a curing agent, and drying to obtain a premix; and sequentially mixing, vulcanizing and curing the premix to obtain the water-lubricated bearing composite material. The invention introduces PU and EP into the NBR material for the first time, after PU is introduced, the elasticity and damping shock absorption of the material can be enhanced, the influence and loss caused by friction vibration can be reduced, and the antifriction wear resistance of the material can be greatly improved by introducing EP.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a water-lubricated bearing composite material and a preparation method thereof.
Background
NBR (nitrile rubber) composites are widely used in the aircraft, automobile, railroad equipment, aerospace equipment and defense industry because of their ease of manufacture, low cost and excellent mechanical properties. With the development of modern industrialization, various water-lubricated tail bearings made of ultra-high molecular weight polyethylene materials, ceramic materials and the like emerge, and the application of the nitrile rubber in the water-lubricated tail bearing puts higher requirements on the performance of the nitrile rubber. The NBR composite material used for the water lubrication bearing in the prior art has the problem of poor wear resistance.
Disclosure of Invention
In view of the above, the present invention aims to provide a water-lubricated bearing composite material and a preparation method thereof. The water-lubricated bearing composite material prepared by the invention has the performances of low friction and high wear resistance.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of various water-lubricated bearing composite materials, which comprises the following steps:
mixing toluene diisocyanate and polytetramethylene glycol for addition reaction to obtain a PU prepolymer;
mixing the PU prepolymer, epoxy resin and a first organic solvent to obtain a first mixture;
mixing nitrile butadiene rubber with a second organic solvent to obtain a nitrile butadiene rubber solution;
mixing the first mixture, a nitrile rubber solution, an additive, a vulcanization aid, an anti-aging agent D, a vulcanizing agent and a curing agent, and drying to obtain a premix;
and sequentially mixing, vulcanizing and curing the premix to obtain the water-lubricated bearing composite material.
Preferably, the mass ratio of the nitrile rubber, the PU prepolymer and the epoxy resin in the nitrile rubber solution is 100:40 (0-60), and the mass of the epoxy resin is not 0.
Preferably, the mass ratio of the nitrile rubber, the polyether polyurethane and the epoxy resin in the nitrile rubber solution is 30:12: 6-18.
Preferably, the mass ratio of the nitrile rubber, the polyether polyurethane and the epoxy resin in the nitrile rubber solution is 30:12: 9-15.
Preferably, the additive is carbon black, and the content of the carbon black is 60 wt% of the nitrile rubber in the nitrile rubber solution.
Preferably, the vulcanization aid comprises stearic acid, zinc oxide, a vulcanization accelerator TMTD, a vulcanization accelerator MBT, a vulcanization accelerator CTP and a vulcanization accelerator CZ, wherein the stearic acid is used in an amount of 1 wt% of the nitrile rubber in the nitrile rubber solution, the zinc oxide is used in an amount of 3 wt% of the nitrile rubber in the nitrile rubber solution, the vulcanization accelerator TMTD is used in an amount of 0.7 wt% of the nitrile rubber in the nitrile rubber solution, the vulcanization accelerator MBT is used in an amount of 0.53 wt% of the nitrile rubber in the nitrile rubber solution, the vulcanization accelerator CTP is used in an amount of 0.53 wt% of the nitrile rubber in the nitrile rubber solution, and the vulcanization accelerator CZ is used in an amount of 0.2 wt% of the nitrile rubber in the nitrile rubber solution.
Preferably, the amount of the antioxidant D is 1 wt% of the amount of the nitrile rubber in the nitrile rubber solution.
Preferably, the temperature of the curing molding is 150-170 ℃, and the time is 20-40 min.
The invention also provides a water-lubricated bearing composite material prepared by the preparation method in the technical scheme, which comprises nitrile rubber, polyether polyurethane, epoxy resin, an additive, a vulcanization auxiliary agent, an anti-aging agent D, a vulcanizing agent and a curing agent.
Preferably, the mass ratio of the nitrile rubber to the polyether urethane to the epoxy resin is 100:40 (0-60), and the mass of the epoxy resin is not 0.
The invention provides a preparation method of a water-lubricated bearing composite material (NBR/PU/EP IPNs), which comprises the following steps: mixing toluene diisocyanate and polytetramethylene glycol for addition reaction to obtain a PU prepolymer; mixing the PU prepolymer, epoxy resin and a first organic solvent to obtain a first mixture; mixing nitrile butadiene rubber with a second organic solvent to obtain a nitrile butadiene rubber solution; mixing the first mixture, a nitrile rubber solution, an additive, a vulcanization aid, an anti-aging agent D, a vulcanizing agent and a curing agent, and drying to obtain a premix; and sequentially mixing, vulcanizing and curing the premix to obtain the water-lubricated bearing composite material. The invention introduces Polyurethane (PU) and epoxy resin (EP) into NBR material for the first time, the introduction of the polyurethane and the epoxy resin is only for further improving the performance of the nitrile rubber, the obtained composite material still uses the nitrile rubber as a main body, the elasticity and the damping shock absorption of the material can be enhanced after the PU is introduced, the influence and the loss caused by friction vibration are reduced, the antifriction and wear resistance of the material can be greatly improved by the introduction of the EP, the prepared water lubricating bearing composite material is a ternary Interpenetrating Polymer Networks (IPNs) composite material, in the IPN, besides the mutual physical permanent entanglement between two networks, chemical coupling and mutual attraction groups have great influence on the form and the performance of the composite material, the composite material prepared by the invention has a unique microstructure which is a continuous structure, the three components exist in a domain distribution with the size of 100nm on the microcosmic, and the domains of each component are in a continuous state, and further, the bearing capacity and the tribological characteristic of the composite material are improved, and a guiding idea is provided for the design of the NBR water-lubricated bearing composite material with low friction and high wear resistance.
Drawings
FIG. 1 is a TEM image of NBR/PU IPNs at a mass ratio of 100:40 in comparative example 1;
FIG. 2 is a TEM image of NBR/PU/E51 IPNs with a mass ratio of 100:40:60 in example 5.
Detailed Description
The invention provides a preparation method of a water-lubricated bearing composite material, which comprises the following steps:
mixing Toluene Diisocyanate (TDI) and polytetramethylene glycol for addition reaction to obtain a PU prepolymer;
mixing the PU prepolymer, epoxy resin and a first organic solvent to obtain a first mixture;
mixing nitrile butadiene rubber with a second organic solvent to obtain a nitrile butadiene rubber solution;
mixing the first mixture, a nitrile rubber solution, an additive, a vulcanization aid, an anti-aging agent D, a vulcanizing agent and a curing agent, and drying to obtain a premix;
and sequentially mixing, vulcanizing and curing the premix to obtain the water-lubricated bearing composite material.
The invention mixes Toluene Diisocyanate (TDI) and polytetramethylene glycol for addition reaction to obtain PU prepolymer.
In the present invention, the polytetramethylene glycol is preferably PTMG2000, PTMG3000, PTMG4000 or PTMG 6000.
In the invention, the molar ratio of OH in the polytetramethylene glycol to NCO in the toluene diisocyanate is preferably 2-3: 1.
In the invention, the temperature of the addition reaction is preferably 70-80 ℃, and the time is preferably 6 h.
In the present invention, the addition reaction is preferably in N2Is carried out in an atmosphere.
In the present invention, the addition reaction is preferably carried out under stirring conditions, and the rotation speed of the stirring is not particularly limited in the present invention, and may be in a manner known to those skilled in the art.
After the PU prepolymer is obtained, the PU prepolymer, the epoxy resin and the first organic solvent are mixed to obtain a first mixture.
In the invention, the first organic solvent is preferably chloroform, DMF or NMP, and the dosage of the first organic solvent is not specially limited, so that the PU prepolymer and the epoxy resin can be uniformly mixed.
In the present invention, the epoxy resin is preferably E51 or E44.
The nitrile butadiene rubber is mixed with a second organic solvent to obtain a nitrile butadiene rubber solution.
In the invention, the second organic solvent is preferably THF, benzene or acetone, and the amount of the second organic solvent is not particularly limited in the invention, so that the nitrile rubber can be completely dissolved.
After the first mixture and the nitrile rubber solution are obtained, the first mixture, the nitrile rubber solution, the additive, the vulcanization auxiliary agent, the anti-aging agent D, the vulcanizing agent and the curing agent are mixed and dried to obtain the premix.
In the invention, the mass ratio of the nitrile rubber, the PU prepolymer and the epoxy resin in the nitrile rubber solution is preferably 100:40 (0-60), and the mass of the epoxy resin is not 0, more preferably 30:12: 6-18, and most preferably 30:12: 9-15.
According to the invention, the first mixture is preferably added into the nitrile rubber solution, and then the additive, the vulcanization auxiliary agent, the anti-aging agent D, the vulcanizing agent and the curing agent are added.
In the present invention, the additive is preferably carbon black, and the content of the carbon black is preferably 60 wt% of the nitrile rubber in the nitrile rubber solution.
In the present invention, the vulcanization aid comprises stearic acid, zinc oxide, a vulcanization accelerator TMTD, a vulcanization accelerator MBT, a vulcanization accelerator CTP and a vulcanization accelerator CZ, the stearic acid is preferably used in an amount of 1 wt% of the nitrile rubber in the nitrile rubber solution, the zinc oxide is preferably used in an amount of 3 wt% of the nitrile rubber in the nitrile rubber solution, the vulcanization accelerator TMTD is preferably used in an amount of 0.7 wt% of the nitrile rubber in the nitrile rubber solution, the vulcanization accelerator MBT is preferably used in an amount of 0.53 wt% of the nitrile rubber in the nitrile rubber solution, the vulcanization accelerator CTP is preferably used in an amount of 0.53 wt% of the nitrile rubber in the nitrile rubber solution, and the vulcanization accelerator CZ is preferably used in an amount of 0.2 wt% of the nitrile rubber in the nitrile rubber solution.
In the present invention, the amount of the antioxidant D is preferably 1 wt% of the amount of the nitrile rubber in the nitrile rubber solution.
In the invention, the vulcanization aid is preferably S (sulfur), and the amount of the sulfur is preferably 2 wt% of the nitrile rubber in the nitrile rubber solution.
In the present invention, the curing agent is preferably a curing agent MOCA, and the amount of the curing agent MOCA is preferably determined in accordance with the amounts of PU and EP.
In the invention, the mixing is preferably stirring, and the rotating speed and the stirring time of the stirring are not particularly limited, so that the raw materials can be uniformly mixed.
In the present invention, the drying is preferably heating, the heating temperature is preferably 60 ℃, and the drying functions to remove the first organic solvent and the second organic solvent.
In the present invention, the drying is preferably performed in a mold.
After the premix is obtained, the premix is sequentially subjected to mixing, vulcanization and curing molding to obtain the water-lubricated bearing composite material.
In the present invention, the kneading is preferably performed 5 to 8 times by passing through a two-roll mill.
In the invention, the vulcanization pressure is preferably 8-10 MPa, and the vulcanization is preferably carried out on a flat vulcanizing machine.
In the invention, the curing molding temperature is preferably 150-170 ℃, and the time is preferably 20-40 min.
The invention also provides a water-lubricated bearing composite material prepared by the preparation method in the technical scheme, which comprises nitrile rubber, polyether polyurethane, epoxy resin, an additive, a vulcanization auxiliary agent, an anti-aging agent D, a vulcanizing agent and a curing agent.
In the invention, the mass ratio of the nitrile rubber, the polyether urethane and the epoxy resin is preferably 100:40 (0-60), and the mass of the epoxy resin is not 0.
For further illustration of the present invention, the following detailed description of the water lubricated bearing composite material provided by the present invention, its preparation method and application are given in conjunction with examples, which should not be construed as limiting the scope of the present invention.
The raw materials used in the examples of the present invention:
adopting epoxy resin (E51) provided by Yueyangbailing petrochemical industry Co., Ltd;
adopts polytetramethylene glycol (PTMG2000) provided by Jining Letian handicraft article Co., Ltd,
toluene Diisocyanate (TDI) provided by the Japan Sandi Wutian chemical is adopted;
nitrile butadiene rubber (2665E) (NBR) having an acrylonitrile content of 29 wt% and a Mooney viscosity of 66;
example 1
30g of NBR raw rubber is cut into small pieces and dissolved in 300g of THF, and the mixture is stirred vigorously; simultaneously dissolving 12g of PU prepolymer and 6g of E51 in 180g of trichloromethane, pouring a mixed solution of the PU prepolymer and E51 in the NBR solution after NBR crude rubber is completely dissolved, violently stirring for 24h, adding carbon black (the dosage is 60 wt% of the nitrile-butadiene rubber), stearic acid (the dosage is 1 wt% of the nitrile-butadiene rubber), zinc oxide (the dosage is 3 wt% of the nitrile-butadiene rubber), a vulcanization accelerator TMTD (the dosage is 0.7 wt% of the nitrile-butadiene rubber), a vulcanization accelerator MBT (the dosage is 0.53 wt% of the nitrile-butadiene rubber), a vulcanization accelerator CTP (the dosage is 0.53 wt% of the nitrile-butadiene rubber), a vulcanization accelerator CZ (the dosage is 0.2 wt% of the nitrile-butadiene rubber), an anti-aging agent D (the dosage is 1 wt% of the nitrile-butadiene rubber), sulfur (the dosage is 2 wt% of the nitrile-butadiene rubber), and a curing agent MOCA (the dosage is 15.37 wt% of the total, after stirring for 24h, the mixture was poured into a mold and the THF and chloroform were removed at 60 ℃. After complete removal of the solvent, the solvent-removed mixture was passed through a two-roll mill 5 times thinly. And finally, applying the pressure of 8MPa to the mixed rubber on a flat vulcanizing machine, curing for 40min at 150 ℃ and then molding to obtain the NBR/PU/E51 IPNs composite material.
Example 2
30g of NBR raw rubber is cut into small pieces and dissolved in 300g of THF, and the mixture is stirred vigorously; simultaneously dissolving 12g of PU prepolymer and 9g of E51 in 180g of trichloromethane, pouring a mixed solution of the PU prepolymer and E51 in the NBR solution after NBR crude rubber is completely dissolved, violently stirring for 24h, adding carbon black (the dosage is 60 wt% of the nitrile-butadiene rubber), stearic acid (the dosage is 1 wt% of the nitrile-butadiene rubber), zinc oxide (the dosage is 3 wt% of the nitrile-butadiene rubber), a vulcanization accelerator TMTD (the dosage is 0.7 wt% of the nitrile-butadiene rubber), a vulcanization accelerator MBT (the dosage is 0.53 wt% of the nitrile-butadiene rubber), a vulcanization accelerator CTP (the dosage is 0.53 wt% of the nitrile-butadiene rubber), a vulcanization accelerator CZ (the dosage is 0.2 wt% of the nitrile-butadiene rubber), an anti-aging agent D (the dosage is 1 wt% of the nitrile-butadiene rubber), sulfur (the dosage is 2 wt% of the nitrile-butadiene rubber), and a curing agent MOCA (the dosage is 18.04 wt% of the total, stirring for 36h, mixing uniformly, pouring the mixed solution into a mold, and removing THF and trichloromethane at 60 ℃. After complete removal of the solvent, the solvent-removed mixture was passed through a two-roll mill 8 times thinly. And finally, applying the pressure of 10MPa to the mixed rubber on a flat vulcanizing machine, and forming after curing for 20min at 170 ℃ to obtain the NBR/PU/E51 IPNs composite material.
Example 3
30g of NBR raw rubber is cut into small pieces and dissolved in 300g of THF, and the mixture is stirred vigorously; simultaneously dissolving 12g of PU prepolymer and 12g of E51 in 180g of trichloromethane, pouring a mixed solution of the PU prepolymer and E51 in the NBR solution after NBR crude rubber is completely dissolved, violently stirring for 24h, adding carbon black (the dosage is 60 wt% of the nitrile-butadiene rubber), stearic acid (the dosage is 1 wt% of the nitrile-butadiene rubber), zinc oxide (the dosage is 3 wt% of the nitrile-butadiene rubber), a vulcanization accelerator TMTD (the dosage is 0.7 wt% of the nitrile-butadiene rubber), a vulcanization accelerator MBT (the dosage is 0.53 wt% of the nitrile-butadiene rubber), a vulcanization accelerator CTP (the dosage is 0.53 wt% of the nitrile-butadiene rubber), a vulcanization accelerator CZ (the dosage is 0.2 wt% of the nitrile-butadiene rubber), an anti-aging agent D (the dosage is 1 wt% of the nitrile-butadiene rubber), sulfur (the dosage is 2 wt% of the nitrile-butadiene rubber), and a curing agent MOCA (the dosage is 20.05 wt% of the total dosage of the PU and the EP) into the mixed solution, stirring for 24h, mixing uniformly, pouring the mixed solution into a mold, and removing THF and trichloromethane at 60 ℃. After complete removal of the solvent, the solvent-removed mixture was passed through a two-roll mill 68 thin passes. And finally, applying the pressure of 9MPa to the mixed rubber on a flat vulcanizing machine, curing for 30min at 160 ℃, and forming to obtain the NBR/PU/E51 IPNs composite material.
Example 4
30g of NBR raw rubber is cut into small pieces and dissolved in 300g of THF, and the mixture is stirred vigorously; simultaneously dissolving 12g of PU prepolymer and 15g of E51 in 180g of trichloromethane, pouring a mixed solution of the PU prepolymer and E51 in the NBR solution after NBR crude rubber is completely dissolved, violently stirring for 24h, adding carbon black (the dosage is 60 wt% of the nitrile-butadiene rubber), stearic acid (the dosage is 1 wt% of the nitrile-butadiene rubber), zinc oxide (the dosage is 3 wt% of the nitrile-butadiene rubber), a vulcanization accelerator TMTD (the dosage is 0.7 wt% of the nitrile-butadiene rubber), a vulcanization accelerator MBT (the dosage is 0.53 wt% of the nitrile-butadiene rubber), a vulcanization accelerator CTP (the dosage is 0.53 wt% of the nitrile-butadiene rubber), a vulcanization accelerator CZ (the dosage is 0.2 wt% of the nitrile-butadiene rubber), an anti-aging agent D (the dosage is 1 wt% of the nitrile-butadiene rubber), sulfur (the dosage is 2 wt% of the nitrile-butadiene rubber), and a curing agent MOCA (the dosage is 21.61 wt% of the total dosage of the PU and the EP) into the mixed solution, stirring for 36h, mixing uniformly, pouring the mixed solution into a mold, and removing THF and trichloromethane at 60 ℃. After complete removal of the solvent, the solvent-removed mixture was passed through a two-roll mill 7 times thinly. And finally, applying the pressure of 8MPa to the mixed rubber on a flat vulcanizing machine, curing for 40min at 150 ℃ and then molding to obtain the NBR/PU/E51 IPNs composite material.
Example 5
30g of NBR raw rubber is cut into small pieces and dissolved in 300g of THF, and the mixture is stirred vigorously; simultaneously dissolving 12g of PU prepolymer and 18g of E51 in 180g of trichloromethane, pouring a mixed solution of the PU prepolymer and E51 in the NBR solution after NBR crude rubber is completely dissolved, violently stirring for 24h, adding carbon black (the dosage is 60 wt% of the nitrile-butadiene rubber), stearic acid (the dosage is 1 wt% of the nitrile-butadiene rubber), zinc oxide (the dosage is 3 wt% of the nitrile-butadiene rubber), a vulcanization accelerator TMTD (the dosage is 0.7 wt% of the nitrile-butadiene rubber), a vulcanization accelerator MBT (the dosage is 0.53 wt% of the nitrile-butadiene rubber), a vulcanization accelerator CTP (the dosage is 0.53 wt% of the nitrile-butadiene rubber), a vulcanization accelerator CZ (the dosage is 0.2 wt% of the nitrile-butadiene rubber), an anti-aging agent D (the dosage is 1 wt% of the nitrile-butadiene rubber), sulfur (the dosage is 2 wt% of the nitrile-butadiene rubber), and a curing agent MOCA (the dosage is 22.86 wt% of the total dosage of the PU and the EP) into the mixed solution, stirring for 36h, mixing uniformly, pouring the mixed solution into a mold, and removing THF and trichloromethane at 60 ℃. After complete removal of the solvent, the solvent-removed mixture was passed through a two-roll mill 8 times thinly. And finally, applying the pressure of 8-10 MPa to the mixed rubber on a flat vulcanizing machine, and forming after curing for 40min at 150 ℃ to obtain the NBR/PU/E51 IPNs composite material.
Comparative example 1
30g of NBR raw rubber is cut into small pieces and dissolved in 300g of THF, and the mixture is stirred vigorously; simultaneously dissolving 12g of PU prepolymer in 120g of trichloromethane, pouring a trichloromethane mixed solution of the PU prepolymer into the NBR solution after the NBR crude rubber is completely dissolved, violently stirring for 24h, adding carbon black (the dosage is 60 wt% of the nitrile-butadiene rubber), stearic acid (the dosage is 1 wt% of the nitrile-butadiene rubber), zinc oxide (the dosage is 3 wt% of the nitrile-butadiene rubber), a vulcanization accelerator TMTD (the dosage is 0.7 wt% of the nitrile-butadiene rubber), a vulcanization accelerator MBT (the dosage is 0.53 wt% of the nitrile-butadiene rubber), a vulcanization accelerator CTP (the dosage is 0.53 wt% of the nitrile-butadiene rubber), a vulcanization accelerator CZ (the dosage is 0.2 wt% of the nitrile-butadiene rubber), an anti-aging agent D (the dosage is 1 wt% of the nitrile-butadiene rubber), sulfur (the dosage is 2 wt% of the nitrile-butadiene rubber), and a curing agent MOCA (the dosage is 6 wt% of the PU) into the mixed solution, stirring for 24h, and uniformly mixing, the mixture was then poured into a mold and the THF and chloroform were removed at 60 ℃. After complete removal of the solvent, the solvent-removed mixture was passed through a two-roll mill 5 times thinly. And finally, applying the pressure of 8MPa to the mixed rubber on a flat vulcanizing machine, and forming after curing for 40min at 150 ℃ to obtain the NBR/PU IPNs composite material.
FIG. 1 is a TEM image of NBR/PU IPNs at a mass ratio of 100:40 in comparative example 1, showing that two phases are distributed in a continuous structure, but the phase boundary is more distinct.
FIG. 2 is a TEM image of NBR/PU/E51 IPNs with a mass ratio of 100:40:60 in example 5. it can be seen that the interface between NBR and PU phase becomes fuzzy after E51 is introduced, the IPNs composite material prepared by the invention has a continuous structure, three components exist in a microscopically distributed phase domain with a size of about 100nm, and the continuous state of the phase domain of each component has a better influence on the tribological performance of the material.
The wear resistance of the prepared composite material is tested:
the test conditions were: the composite material and a steel ring are subjected to opposite grinding (ring block mode), the test loading force is 50N, the rotating speed is 0.258m/s, the running time is 200min, the lubricating condition is water lubrication, and the friction coefficient and the wear rate are average values of 3-5 tests.
Table 1 shows the wear rate values of the composite materials prepared in examples 1-5 and comparative example 1, and it can be seen that the antifriction wear resistance of the NBR/PU binary IPNs composite material is greatly improved after the epoxy resin is added.
TABLE 1 numerical values of wear rates of the composite materials prepared in examples 1 to 5 and comparative example 1
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. The preparation method of the water-lubricated bearing composite material is characterized by comprising the following steps of:
mixing toluene diisocyanate and polytetramethylene glycol for addition reaction to obtain a PU prepolymer;
mixing the PU prepolymer, epoxy resin and a first organic solvent to obtain a first mixture;
mixing nitrile butadiene rubber with a second organic solvent to obtain a nitrile butadiene rubber solution;
mixing the first mixture, a nitrile rubber solution, an additive, a vulcanization aid, an anti-aging agent D, a vulcanizing agent and a curing agent, and drying to obtain a premix;
and sequentially mixing, vulcanizing and curing the premix to obtain the water-lubricated bearing composite material.
2. The preparation method of the nitrile butadiene rubber-based polyurethane polymer composition according to claim 1, wherein the mass ratio of the nitrile butadiene rubber, the PU prepolymer and the epoxy resin in the nitrile butadiene rubber solution is 100:40 (0-60), and the mass of the epoxy resin is not 0.
3. The preparation method according to claim 1 or 2, wherein the mass ratio of the nitrile rubber, the polyether urethane and the epoxy resin in the nitrile rubber solution is 30:12: 6-18.
4. The preparation method according to claim 3, wherein the mass ratio of the nitrile rubber, the polyether urethane and the epoxy resin in the nitrile rubber solution is 30:12: 9-15.
5. The method according to claim 1, wherein the additive is carbon black, and the content of the carbon black is 60 wt% of the nitrile rubber in the nitrile rubber solution.
6. The preparation method according to claim 1, wherein the vulcanization aid comprises stearic acid, zinc oxide, a vulcanization accelerator TMTD, a vulcanization accelerator MBT, a vulcanization accelerator CTP and a vulcanization accelerator CZ, the stearic acid is used in an amount of 1 wt% of the nitrile rubber in the nitrile rubber solution, the zinc oxide is used in an amount of 3 wt% of the nitrile rubber in the nitrile rubber solution, the vulcanization accelerator TMTD is used in an amount of 0.7 wt% of the nitrile rubber in the nitrile rubber solution, the vulcanization accelerator MBT is used in an amount of 0.53 wt% of the nitrile rubber in the nitrile rubber solution, the vulcanization accelerator CTP is used in an amount of 0.53 wt% of the nitrile rubber in the nitrile rubber solution, and the vulcanization accelerator CZ is used in an amount of 0.2 wt% of the nitrile rubber in the nitrile rubber solution.
7. The method according to claim 1, wherein the antioxidant D is used in an amount of 1 wt% based on the amount of the nitrile rubber in the nitrile rubber solution.
8. The preparation method according to claim 1, wherein the curing and molding temperature is 150-170 ℃ and the curing and molding time is 20-40 min.
9. The water-lubricated bearing composite material prepared by the preparation method of any one of claims 1 to 8, which is characterized by comprising nitrile rubber, polyether urethane, epoxy resin, an additive, a vulcanization aid, an anti-aging agent D, a vulcanizing agent and a curing agent.
10. The water-lubricated bearing composite material as claimed in claim 9, wherein the mass ratio of the nitrile rubber to the polyether urethane to the epoxy resin is 100:40 (0-60), and the mass of the epoxy resin is not 0.
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| CN113929984A (en) * | 2021-10-28 | 2022-01-14 | 中国科学院兰州化学物理研究所 | High-damping and high-wear-resistance water-lubricated composite material and preparation method and application thereof |
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Application publication date: 20210806 |