CN109735383B - Molybdenum disulfide-bismaleimide solid lubricating sliding block and preparation method thereof - Google Patents
Molybdenum disulfide-bismaleimide solid lubricating sliding block and preparation method thereof Download PDFInfo
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- 239000007787 solid Substances 0.000 title claims abstract description 58
- -1 Molybdenum disulfide-bismaleimide Chemical compound 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 230000001050 lubricating effect Effects 0.000 title description 14
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 claims abstract description 37
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 37
- 229920003192 poly(bis maleimide) Polymers 0.000 claims abstract description 37
- 239000002002 slurry Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 19
- WOCGGVRGNIEDSZ-UHFFFAOYSA-N 4-[2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical compound C=1C=C(O)C(CC=C)=CC=1C(C)(C)C1=CC=C(O)C(CC=C)=C1 WOCGGVRGNIEDSZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002199 base oil Substances 0.000 claims abstract description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 10
- 239000011707 mineral Substances 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 27
- 229910052710 silicon Inorganic materials 0.000 claims description 27
- 239000010703 silicon Substances 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 19
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 18
- 239000011733 molybdenum Substances 0.000 claims description 18
- 229910052750 molybdenum Inorganic materials 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- 239000006185 dispersion Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 229920001577 copolymer Polymers 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 2
- 229920002545 silicone oil Polymers 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims 1
- 238000005461 lubrication Methods 0.000 abstract description 7
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 238000010943 off-gassing Methods 0.000 abstract description 3
- 238000006116 polymerization reaction Methods 0.000 abstract description 3
- 238000009210 therapy by ultrasound Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 16
- 229920005989 resin Polymers 0.000 description 12
- 239000011347 resin Substances 0.000 description 12
- 238000002474 experimental method Methods 0.000 description 11
- 235000010755 mineral Nutrition 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 7
- 239000004593 Epoxy Substances 0.000 description 5
- 239000004519 grease Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 239000011573 trace mineral Substances 0.000 description 4
- 235000013619 trace mineral Nutrition 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000011157 advanced composite material Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000012745 toughening agent Substances 0.000 description 1
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Abstract
The invention discloses a molybdenum disulfide-bismaleimide solid lubrication sliding block and a preparation method thereof. According to the invention, mineral base oil is adopted to form coating on the surface of molybdenum disulfide, and then the coated molybdenum disulfide is dispersed in the liquid of diallyl bisphenol A through stirring and ultrasonic treatment to form slurry. The density of the slurry is adjusted by adjusting the ratio of the two so that the density is close to that of the bismaleimide melt. By breaking down the curing process into a prepolymerization and a polymerization process, the problem of bubbles due to insufficient outgassing caused by the complicated shape of the mold is reduced. The molybdenum disulfide/bismaleimide solid sliding block prepared by the method has higher strength and toughness and good wear resistance, and can be used in a higher temperature range.
Description
Technical Field
The invention belongs to a solid lubricating sliding block and a preparation method thereof in the field of solid lubricating materials, and particularly relates to a molybdenum disulfide-bismaleimide solid lubricating sliding block and a preparation method thereof.
Background
The friction and abrasion of the material are important reasons for causing the material to fail, and the friction can cause the surface temperature of the material to be increased and the energy consumption to be increased; the wear may damage the shape and size of the material surface, reducing the stability of the material, ultimately leading to failure of the workpiece. The economic loss of China caused by friction and abrasion is up to billions of yuan each year. Prolonging the service life of parts and machines and reducing the frictional wear of materials is an urgent problem.
The ability to reduce frictional wear and to improve the frictional wear resistance of materials is an important research area that has become engineering materials in recent years. Among them, grease lubrication is the most commonly used way to reduce friction and wear, and grease lubrication is a cheap and easily available solution in most cases, however, in a production environment with high requirements, grease is difficult to meet the use requirements due to its lubrication pollution and lubrication performance degradation under high load at high temperature. The solid self-lubricating composite material has wide use temperature, strong bearing capacity and stable physical and chemical properties, breaks through the use limit of the traditional lubricating material, is widely applied to the fields of heavy industry, electronics, aerospace and the like, and is an important direction for the development of the technical field of lubrication.
The solid self-lubricating composite material can be divided into a metal-based solid self-lubricating composite material, an inorganic non-solid self-lubricating composite material and a polymer-based solid self-lubricating composite material. The metal-based solid self-lubricating composite material has good mechanical strength, but is easy to corrode in the using process; the inorganic non-solid self-lubricating composite material has high hardness and wear resistance, but has high preparation cost and high post processing difficulty. The polymer-based solid self-lubricating composite material has low density, low friction coefficient and strong corrosion resistance, but the heat resistance of the composite material needs to be improved.
The bismaleimide is widely applied to the industrial fields of aviation, aerospace, machinery, electronics and the like as a resin matrix of an advanced composite material due to excellent heat resistance, radiation resistance, flame retardance, stable dimension and excellent mechanical property, but the bismaleimide has poor toughness and is easy to crack when operated at high strength; after the common toughening agent is added, the wear is easy to occur at high temperature.
The molybdenum disulfide is used as an important two-dimensional layered nano material, has a unique sandwich structure, large specific surface area and good thermal stability and chemical stability; because the layers of the laminated structure are mainly combined by Van der Waals force, the bonding energy is low, the sliding is easy, and the friction and the abrasion between the laminated structure and other materials are reduced; in addition, the easy-to-slide multilayer sheet structure can effectively increase the fluidity of the macromolecular fluid under the action of shearing force, and the processability of the polymer material is enhanced. However, molybdenum disulfide has poor interfacial compatibility when compounded with other materials, particularly with polymer matrices, leading to increased brittleness of the material and increased frictional wear of the material at higher pressures. Therefore, currently, molybdenum disulfide is mainly used as a lubricating film, and the solid slider material is selected less.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a molybdenum disulfide-bismaleimide solid lubrication sliding block and a preparation method thereof.
The invention prepares the molybdenum disulfide/bismaleimide solid slide block by a three-step method, and the technical scheme adopted for solving the technical problem specifically comprises the following steps:
the method comprises the following steps: preparing molybdenum disulfide-allyl bisphenol A slurry;
step two: preparing a molybdenum disulfide-bismaleimide prepolymer;
step three: and preparing a molybdenum disulfide-bismaleimide solid sliding block.
The first step is specifically as follows: mixing and ultrasonically dispersing molybdenum disulfide (1-5um) and mineral base oil in a mass ratio of 1: 1-1: 2 to obtain a dispersion liquid, and ultrasonically mixing the dispersion liquid and diallyl bisphenol A in a mass ratio of 1: 1-2: 1 at 70-85 ℃ for 15-20 min to form molybdenum disulfide-allyl bisphenol A slurry.
The slurry density of the molybdenum disulfide-allyl bisphenol A slurry is close to that of the bismaleimide melt.
The second step is specifically as follows: melting yellow bismaleimide powder, adding molybdenum disulfide-allyl bisphenol A slurry, heating and stirring to 130-140 ℃, ultrasonically dispersing for 10-15 minutes, reacting for 0.5-1 hour, putting into an oven with the same reaction temperature (130-140 ℃) and vacuumizing until no bubbles are discharged, and thus obtaining the molybdenum disulfide-bismaleimide prepolymer.
The third step is specifically as follows:
(1) preheating a solid slide block die, spraying a layer of silicon release agent, and casting the silicon release agent in the die by taking a molybdenum disulfide-bismaleimide prepolymer as a sample, so that the surface of the poured liquid is slightly higher than the upper surface of the die;
(2) then heating to 160 ℃ and preserving the heat for 2 hours; keeping the temperature at 180 ℃ for 2 hours; and cooling to 80 ℃, finally taking out and carrying out high-temperature treatment to fully solidify the resin to obtain a solid sliding block product, namely the molybdenum disulfide-bismaleimide solid sliding block.
The silicon-based release agent is a mixture of organic silicon wax, silicone oil and a small amount of fluorocarbon copolymer.
The high-temperature treatment in the step (2) is specifically a post-treatment carried out by keeping the temperature at 220 ℃ for 12 hours.
Made by the method of any one of claims 1-7.
According to the invention, mineral base oil is adopted to form coating on the surface of molybdenum disulfide, and then the coated molybdenum disulfide is dispersed in the liquid of diallyl bisphenol A through stirring and ultrasonic treatment to form slurry. The density of the slurry is adjusted by adjusting the ratio of the two so that the density is close to that of the bismaleimide melt. By breaking down the curing process into a prepolymerization and a polymerization process, the problem of bubbles due to insufficient outgassing caused by the complicated shape of the mold is reduced.
According to the invention, molybdenum disulfide is used as a filler of bismaleimide to increase the wear resistance of the composite material, so that the composite material has the characteristics of rapidness and high efficiency, but the material directly compounded by molybdenum disulfide and bismaleimide has high brittleness and no engineering application value. Therefore, the invention adopts mineral base oil to form coating on the surface of the molybdenum disulfide, and then the coated molybdenum disulfide is dispersed in the liquid of the diallyl bisphenol A by stirring and ultrasonic to form slurry. The density of the slurry is adjusted by adjusting the ratio of the two so that the density is close to that of the bismaleimide melt. By breaking down the curing process into a prepolymerization and a polymerization process, the problem of bubbles due to insufficient outgassing caused by the complicated shape of the mold is reduced. The slurry is added, so that the bismaleimide-based lubricating grease has an obvious toughening effect on bismaleimide, the friction coefficient and the wear rate of the bismaleimide-based lubricating grease are greatly reduced, the mineral oil coated on the surface of the molybdenum disulfide can be released in the friction experiment process to form a lubricating oil film, the surface temperature rise in the friction process is reduced, the wear value is reduced in a certain range, and the requirement of a solid lubricating sliding block is met.
The invention has the beneficial effects that:
(1) the molybdenum disulfide-bismaleimide solid lubricating sliding block prepared by the invention can be used in a higher temperature range, and the temperature range is room temperature-200 ℃.
(2) The friction coefficient and the wear rate of the molybdenum disulfide-bismaleimide solid lubricating sliding block prepared by the invention are very low;
(3) the temperature rise of the worn surface of the molybdenum disulfide-bismaleimide solid lubricating sliding block prepared by the invention is low in the friction test process.
(4) The molybdenum disulfide-bismaleimide solid lubricating sliding block prepared by the invention has higher strength and toughness.
In conclusion, the molybdenum disulfide/bismaleimide solid slider prepared by the method has higher strength and toughness and good wear resistance, and can be used in a higher temperature range.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but it should not be construed that the scope of the present invention is limited to the following examples. Various substitutions and alterations can be made by those skilled in the art and by conventional means without departing from the spirit of the method of the invention described above.
The examples of the invention are as follows:
example 1:
the method comprises the following steps: preparation of molybdenum disulfide slurry
Molybdenum disulfide (1-5um) and mineral base oil are rapidly mixed and ultrasonically dispersed according to the mass ratio of 1:1, the dispersion liquid and diallyl bisphenol A are ultrasonically mixed at the temperature of 70 ℃ according to the mass ratio of 1:1, the mixing time is 15min, molybdenum disulfide-allyl bisphenol A slurry is formed, and the density of the slurry is close to that of bismaleimide melt.
Step two: preparation of molybdenum disulfide-bismaleimide prepolymer
Melting yellow bismaleimide powder, adding the molybdenum disulfide-allyl bisphenol A slurry, heating and stirring to 130 ℃, ultrasonically dispersing for 10 minutes, reacting for 0.5 hour, placing into an oven with the same reaction temperature (130 ℃) and vacuumizing until no bubbles are discharged.
Step three: preparation of molybdenum disulfide-bismaleimide solid slider
(1) Preheating a solid sliding block mould, spraying a layer of silicon release agent, wherein the silicon release agent is a mixture of organic silicon wax, silicon oil and a small amount of fluorocarbon copolymer, and the obtained prepolymer is a sample and is cast in the mould, so that the surface of the cast liquid is slightly higher than the upper surface of the mould.
(2) Heating to 160 ℃ and preserving the heat for 2 hours; keeping the temperature at 180 ℃ for 2 hours; and cooling to 80 ℃, and taking out a sample. And finally, carrying out high-temperature post-treatment, namely carrying out post-treatment by keeping the temperature at 220 ℃ for 12 hours, so that the resin is fully cured, and obtaining a solid slide block product.
Analyzing the surface element content of the slide block after the friction experiment by using an energy spectrometer to obtain the surface element composition: c62.4 wt%; 32.5 percent by weight of O; 1.1 wt% of S; 0.4 wt% of P; mo1.8 wt%, indicating that a small amount of molybdenum disulfide migrated from the surface, and trace amounts of P element measured on the surface, and trace amounts of mineral oil were present on the major surface wear surfaces.
The temperature of the worn surface was measured with a non-contact infrared thermometer and recorded at a distance of 10cm from the area of frictional wear of the sample.
The bismaleimide slider in the above table was prepared as a control by the following process: melting bismaleimide powder at 140 ℃, heating to 160 ℃, and keeping the temperature for 2 hours; keeping the temperature at 180 ℃ for 2 hours; the temperature is reduced to 80 ℃, and the sample is taken out at ws. And finally, carrying out high-temperature post-treatment, namely carrying out post-treatment by keeping the temperature at 220 ℃ for 12 hours, so that the resin is fully cured, and obtaining a solid slide block product.
Therefore, the comparison experiment results show that the molybdenum disulfide epoxy composite material has good strength and toughness, the wear resistance is improved, and the surface temperature is increased slowly.
Example 2:
the method comprises the following steps: preparation of molybdenum disulfide slurry
Mixing molybdenum disulfide (1-5um) and mineral base oil in a ratio of 1:2, carrying out rapid mixing and ultrasonic dispersion, carrying out ultrasonic mixing on the dispersion liquid and the diallyl bisphenol A at the mass ratio of 2:1 at the temperature of 85 ℃, wherein the mixing time is 20min, and molybdenum disulfide-allyl bisphenol A slurry is formed, and the density of the slurry is close to that of the bismaleimide melt.
Step two: preparation of molybdenum disulfide-bismaleimide prepolymer
Melting yellow bismaleimide powder, adding the molybdenum disulfide-allyl bisphenol A slurry, heating and stirring to 140 ℃, ultrasonically dispersing for 15 minutes, reacting for 1 hour, placing in an oven with the same reaction temperature (140 ℃) and vacuumizing until no bubbles are discharged.
Step three: preparation of molybdenum disulfide-bismaleimide solid slider
(1) Preheating a solid sliding block mould, spraying a layer of silicon release agent, wherein the silicon release agent is a mixture of organic silicon wax, silicon oil and a small amount of fluorocarbon copolymer, and the obtained prepolymer is a sample and is cast in the mould, so that the surface of the cast liquid is slightly higher than the upper surface of the mould.
(2) Heating to 160 ℃ and preserving the heat for 2 hours; keeping the temperature at 180 ℃ for 2 hours; and cooling to 80 ℃, and taking out a sample. And finally, carrying out high-temperature post-treatment, namely carrying out post-treatment by keeping the temperature at 220 ℃ for 12 hours, so that the resin is fully cured, and obtaining a solid slide block product.
Analyzing the surface element content of the slide block after the friction experiment by using an energy spectrometer to obtain the surface element composition: c62 wt%; 34.1 percent by weight of O; 1.3 wt% of S; 0.5 wt% of P; mo2.1wt%. Indicating that a small amount of molybdenum disulfide is migrated on the surface, and trace P element is measured on the surface, and trace mineral oil is also present on the main surface abrasion surface.
The temperature of the worn surface was measured with a non-contact infrared thermometer and recorded at a distance of 10cm from the area of frictional wear of the sample.
The bismaleimide slider in the above table was prepared as a control by the following process: melting bismaleimide powder at 140 ℃, heating to 160 ℃, and keeping the temperature for 2 hours; keeping the temperature at 180 ℃ for 2 hours; and cooling to 80 ℃, and taking out a sample. And finally, carrying out high-temperature post-treatment, namely carrying out post-treatment by keeping the temperature at 220 ℃ for 12 hours, so that the resin is fully cured, and obtaining a solid slide block product.
Therefore, the comparison experiment results show that the molybdenum disulfide epoxy composite material has good strength and toughness, the wear resistance is improved, and the surface temperature is increased slowly.
Example 3:
the method comprises the following steps: preparation of molybdenum disulfide slurry
Molybdenum disulfide (1-5um) and mineral base oil are rapidly mixed and ultrasonically dispersed according to the mass ratio of 1:1.5, the dispersion liquid and diallyl bisphenol A are ultrasonically mixed at the temperature of 80 ℃ according to the mass ratio of 1.5:1, the mixing time is 18min, molybdenum disulfide-allyl bisphenol A slurry is formed, and the density of the slurry is close to that of bismaleimide melt.
Step two: preparation of molybdenum disulfide-bismaleimide prepolymer
Melting yellow bismaleimide powder, adding the molybdenum disulfide-allyl bisphenol A slurry, heating and stirring to 135 ℃, ultrasonically dispersing for 12 minutes, reacting for 0.8 hour, placing into an oven with the same reaction temperature (135 ℃) and vacuumizing until no bubbles are discharged.
Step three: preparation of molybdenum disulfide-bismaleimide solid slider
(1) Preheating a solid sliding block mould, spraying a layer of silicon release agent, wherein the silicon release agent is a mixture of organic silicon wax, silicon oil and a small amount of fluorocarbon copolymer, and the obtained prepolymer is a sample and is cast in the mould, so that the surface of the cast liquid is slightly higher than the upper surface of the mould.
(2) Heating to 160 ℃ and preserving the heat for 2 hours; keeping the temperature at 180 ℃ for 2 hours; and cooling to 80 ℃, and taking out a sample. And finally, carrying out high-temperature post-treatment, namely carrying out post-treatment by keeping the temperature at 220 ℃ for 12 hours, so that the resin is fully cured, and obtaining a solid slide block product.
Analyzing the surface element content of the slide block after the friction experiment by using an energy spectrometer to obtain the surface element composition: c61.8wt%; 35.7 percent by weight of O; 0.9 wt% of S; 0.2 wt% of P; mo1.4wt%. Indicating that a small amount of molybdenum disulfide is migrated on the surface, and trace P element is measured on the surface, and trace mineral oil is also present on the main surface abrasion surface.
The temperature of the worn surface was measured with a non-contact infrared thermometer and recorded at a distance of 10cm from the area of frictional wear of the sample.
The bismaleimide slider in the above table was prepared as a control by the following process: melting bismaleimide powder at 140 ℃, heating to 160 ℃, and keeping the temperature for 2 hours; keeping the temperature at 180 ℃ for 2 hours; and cooling to 80 ℃, and taking out a sample. And finally, carrying out high-temperature post-treatment, namely carrying out post-treatment by keeping the temperature at 220 ℃ for 12 hours, so that the resin is fully cured, and obtaining a solid slide block product.
Therefore, the comparison experiment results show that the molybdenum disulfide epoxy composite material has good strength and toughness, the wear resistance is improved, and the surface temperature is increased slowly.
Example 4:
the method comprises the following steps: preparation of molybdenum disulfide slurry
Mixing molybdenum disulfide (1-5um) and mineral base oil in a ratio of 1: 1.8, carrying out rapid mixing and ultrasonic dispersion, and carrying out ultrasonic mixing on the dispersion liquid and diallyl bisphenol A at the mass ratio of 1.5:1 at 78 ℃, wherein the mixing time is 20min, and molybdenum disulfide-allyl bisphenol A slurry is formed, and the density of the slurry is close to that of a bismaleimide melt.
Step two: preparation of molybdenum disulfide-bismaleimide prepolymer
Melting yellow bismaleimide powder, adding the molybdenum disulfide-allyl bisphenol A slurry, heating and stirring to 140 ℃, ultrasonically dispersing for 10 minutes, reacting for 0.5 hour, placing into an oven with the same reaction temperature (130 ℃) and vacuumizing until no bubbles are discharged.
Step three: preparation of molybdenum disulfide-bismaleimide solid slider
(1) Preheating a solid sliding block mould, spraying a layer of silicon release agent, wherein the silicon release agent is a mixture of organic silicon wax, silicon oil and a small amount of fluorocarbon copolymer, and the obtained prepolymer is a sample and is cast in the mould, so that the surface of the cast liquid is slightly higher than the upper surface of the mould.
(2) Heating to 160 ℃ and preserving the heat for 2 hours; keeping the temperature at 180 ℃ for 2 hours; and cooling to 80 ℃, and taking out a sample. And finally, carrying out high-temperature post-treatment, namely carrying out post-treatment by keeping the temperature at 220 ℃ for 12 hours, so that the resin is fully cured, and obtaining a solid slide block product.
Analyzing the surface element content of the slide block after the friction experiment by using an energy spectrometer to obtain the surface element composition: 58 wt% of C; 37.9 percent by weight of O; 1.6 wt% of S; 0.6 wt% of P; mo1.9wt%. Indicating that a small amount of molybdenum disulfide is migrated on the surface, and trace P element is measured on the surface, and trace mineral oil is also present on the main surface abrasion surface.
The temperature of the worn surface was measured with a non-contact infrared thermometer and recorded at a distance of 10cm from the area of frictional wear of the sample.
The bismaleimide slider in the above table was prepared as a control by the following process: melting bismaleimide powder at 140 ℃, heating to 160 ℃, and keeping the temperature for 2 hours; keeping the temperature at 180 ℃ for 2 hours; and cooling to 80 ℃, and taking out a sample. And finally, carrying out high-temperature post-treatment, namely carrying out post-treatment by keeping the temperature at 220 ℃ for 12 hours, so that the resin is fully cured, and obtaining a solid slide block product.
Therefore, the comparison experiment results show that the molybdenum disulfide epoxy composite material has good strength and toughness, the wear resistance is improved, and the surface temperature is increased slowly.
Example 5:
the method comprises the following steps: preparation of molybdenum disulfide slurry
Mixing molybdenum disulfide (1-5um) and mineral base oil in a ratio of 1:2, carrying out rapid mixing and ultrasonic dispersion, and carrying out ultrasonic mixing on the dispersion liquid and the diallyl bisphenol A at a mass ratio of 1.5:1 at 82 ℃ for 20min to form molybdenum disulfide-allyl bisphenol A slurry, wherein the density of the slurry is close to that of the bismaleimide melt.
Step two: preparation of molybdenum disulfide-bismaleimide prepolymer
Melting yellow bismaleimide powder, adding the molybdenum disulfide-allyl bisphenol A slurry, heating and stirring to 140 ℃, ultrasonically dispersing for 15 minutes, reacting for 1 hour, placing in an oven with the same reaction temperature (140 ℃) and vacuumizing until no bubbles are discharged.
Step three: preparation of molybdenum disulfide-bismaleimide solid slider
(1) Preheating a solid sliding block mould, spraying a layer of silicon release agent, wherein the silicon release agent is a mixture of organic silicon wax, silicon oil and a small amount of fluorocarbon copolymer, and the obtained prepolymer is a sample and is cast in the mould, so that the surface of the cast liquid is slightly higher than the upper surface of the mould.
(2) Heating to 160 ℃ and preserving the heat for 2 hours; keeping the temperature at 180 ℃ for 2 hours; and cooling to 80 ℃, and taking out a sample. And finally, carrying out high-temperature post-treatment, namely carrying out post-treatment by keeping the temperature at 220 ℃ for 12 hours, so that the resin is fully cured, and obtaining a solid slide block product.
Analyzing the surface element content of the slide block after the friction experiment by using an energy spectrometer to obtain the surface element composition: 56.2 wt% of C; 39.4 wt% of O; 1.8 wt% of S; 0.4 wt% of P; 2.2 wt% of Mo. Indicating that a small amount of molybdenum disulfide is migrated on the surface, and trace P element is measured on the surface, and trace mineral oil is also present on the main surface abrasion surface.
The temperature of the worn surface was measured with a non-contact infrared thermometer and recorded at a distance of 10cm from the area of frictional wear of the sample.
The bismaleimide slider in the above table was prepared as a control by the following process: melting bismaleimide powder at 140 ℃, heating to 160 ℃, and keeping the temperature for 2 hours; keeping the temperature at 180 ℃ for 2 hours; and cooling to 80 ℃, and taking out a sample. And finally, carrying out high-temperature post-treatment, namely carrying out post-treatment by keeping the temperature at 220 ℃ for 12 hours, so that the resin is fully cured, and obtaining a solid slide block product.
Therefore, the comparison experiment results show that the molybdenum disulfide epoxy composite material has good strength and toughness, the wear resistance is improved, and the surface temperature is increased slowly.
Claims (5)
1. A preparation method of a molybdenum disulfide-bismaleimide solid slider is characterized by comprising the following steps:
the method comprises the following steps: preparing molybdenum disulfide-allyl bisphenol A slurry;
the first step is specifically as follows: mixing molybdenum disulfide with the particle size of 1-5 mu m and mineral base oil in a mass ratio of 1: 1-1: 2, performing ultrasonic dispersion to obtain a dispersion liquid, and performing ultrasonic mixing on the dispersion liquid and diallyl bisphenol A in a mass ratio of 1: 1-2: 1 at the temperature of 70-85 ℃, wherein the mixing time is 15-20 min, so as to form molybdenum disulfide-allyl bisphenol A slurry;
step two: preparing a molybdenum disulfide-bismaleimide prepolymer;
the second step is specifically as follows: melting bismaleimide powder, adding molybdenum disulfide-allyl bisphenol A slurry, heating and stirring to 130-140 ℃, ultrasonically dispersing for 10-15 minutes, reacting for 0.5-1 hour, putting into an oven with the same reaction temperature, and vacuumizing until no bubbles are discharged to obtain a molybdenum disulfide-bismaleimide prepolymer;
step three: preparing a molybdenum disulfide-bismaleimide solid sliding block;
the third step is specifically as follows:
(1) preheating a solid sliding block mold, spraying a layer of silicon release agent, and casting the molybdenum disulfide-bismaleimide prepolymer serving as a sample in the mold to enable the surface of the poured liquid to be higher than the upper surface of the mold;
(2) then heating to 160 ℃ and preserving the heat for 2 hours; keeping the temperature at 180 ℃ for 2 hours; and cooling to 80 ℃, and finally taking out the solid slide block and performing high-temperature treatment to obtain a solid slide block product, namely the molybdenum disulfide-bismaleimide solid slide block.
2. The method for preparing the molybdenum disulfide-bismaleimide solid slider as claimed in claim 1, wherein: the slurry density of the molybdenum disulfide-allyl bisphenol A slurry is close to that of the bismaleimide melt.
3. The method for preparing the molybdenum disulfide-bismaleimide solid slider as claimed in claim 1, wherein: the silicon-based release agent is a mixture of organic silicon wax, silicone oil and a small amount of fluorocarbon copolymer.
4. The method for preparing the molybdenum disulfide-bismaleimide solid slider as claimed in claim 1, wherein: the high-temperature treatment in the step (2) is specifically a post-treatment carried out by keeping the temperature at 220 ℃ for 12 hours.
5. A molybdenum disulfide-bismaleimide solid slider is characterized in that: made by the method of any one of claims 1-4.
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