CN110564260B - Self-lubricating coating with ultralow friction coefficient and preparation method thereof - Google Patents
Self-lubricating coating with ultralow friction coefficient and preparation method thereof Download PDFInfo
- Publication number
- CN110564260B CN110564260B CN201910735154.8A CN201910735154A CN110564260B CN 110564260 B CN110564260 B CN 110564260B CN 201910735154 A CN201910735154 A CN 201910735154A CN 110564260 B CN110564260 B CN 110564260B
- Authority
- CN
- China
- Prior art keywords
- lubricating
- self
- mass fraction
- solution
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/06—Making microcapsules or microballoons by phase separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Nanotechnology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Composite Materials (AREA)
- Lubricants (AREA)
Abstract
The invention discloses a self-lubricating coating with an ultralow friction coefficient and a preparation method thereof, belonging to the technical field of self-lubricating composite materials. The self-lubricating coating consists of resin, a reinforcing phase and a lubricating phase, wherein the lubricating phase comprises capsules containing a lubricating agent; in the self-lubricating coating, the mass fraction of the reinforcing phase is 0.1-50%, the mass fraction of the lubricating phase is 1-35%, and the mass fraction of the resin is 20-85%. The invention solves the current situation that the prior art depends on lubricating oil to lubricate a friction interface, leads the coating to show the characteristic of oil lubrication in the lubricating process, simultaneously avoids various defects of an external oil lubricating system, and enriches and widens the application field of the resin-based coating.
Description
Technical Field
The invention belongs to the technical field of self-lubricating composite materials, and particularly relates to a self-lubricating coating with an ultralow friction coefficient and a preparation method thereof.
Background
Since the 21 st century, the high-tech fields of nuclear industry, aerospace, ocean engineering, military equipment and the like are continuously developed towards light weight, intellectualization, long service life and the like, the friction and wear problems of friction parts of mechanical products such as gears, bearings, sealing parts and the like under a series of severe working conditions of overload, ultrahigh vacuum and strong radiation are increasingly prominent, and the current solid self-lubricating coating has the defects of poor lubricating performance, high wear rate and the like. And traditional lubricating materials such as lubricating oil, lubricating grease and the like are difficult to meet the system operation conditions, and in addition, the objective requirements of environmental protection on energy conservation and material conservation are met, so the research on the friction performance and the lubricating performance of the self-lubricating coating faces huge challenges.
Disclosure of Invention
The invention aims to provide an ultralow-friction-coefficient self-lubricating coating and a preparation method thereof aiming at the defects of the prior art, the ultralow-friction-coefficient self-lubricating coating is composed of resin, a reinforcing phase and a lubricating phase, and the lubricating phase comprises capsules containing a lubricant;
in the self-lubricating coating, the mass fraction of the reinforcing phase is 0.1-20%, the mass fraction of the lubricating phase is 1-35%, and the mass fraction of the resin is 20-85%.
The lubricating phase also comprises any one or more of graphene, graphite, graphene oxide, graphite fluoride, talcum powder, polytetrafluoroethylene and molybdenum disulfide;
the resin is composed of any one or more of epoxy resin, phenolic resin and organic silicon resin;
the reinforcing phase is composed of any one or more of carbon fiber, glass fiber, silicon nitride, copper-zinc alloy powder, nano ceramic powder and polyimide.
The capsule is a micron capsule or a nanometer capsule, the particle size of the capsule is 100nm-300 μm, and the wall thickness is 10nm-40 μm.
A preparation method of an ultralow-friction-coefficient self-lubricating coating comprises the following steps:
1) respectively weighing a lubricant and a polymer, wherein the mass ratio of the lubricant to the polymer is 1 (0.25-9);
2) adding a lubricant and a polymer into a solvent, and uniformly stirring to obtain a solution A, wherein the mass fraction of the solvent in the solution A is 30-95%;
3) adding a surfactant into deionized water to form a solution B, wherein the mass fraction of the surfactant in the solution B is 0.05-5%;
4) under the condition of stirring, adding the solution A into the solution B at one time to form a microemulsion, volatilizing the solvent at a certain temperature, filtering, washing and drying to obtain the capsule, wherein the mass ratio of the solution A to the solution B in the microemulsion is 1 (2.5-10), the stirring speed is 100-2000rpm, and the temperature is 25-70 ℃;
5) the capsule is used as a lubricating phase or the capsule and any one or more of graphene, graphite, oxidized graphene, graphite fluoride, talcum powder, polytetrafluoroethylene and molybdenum disulfide are mixed to be used as the lubricating phase;
6) stirring and mixing the lubricating phase, the reinforcing phase and the resin uniformly to form a suspension;
7) removing air bubbles in the suspension in the step 6) to obtain slurry;
8) coating the slurry of the step 7) on a substrate;
9) and (3) curing the matrix obtained in the step 8) to obtain the self-lubricating coating, wherein the curing temperature is 25-100 ℃, and the curing time is 10-48 h.
In the step 1), the lubricant is a capsule core, and the polymer is a capsule wall; the lubricant is composed of one or more of mineral lubricating oil, synthetic lubricating oil, animal lubricating oil and ionic liquid, the polymer is one or more of polystyrene, polymethyl methacrylate, polysulfone and polyvinyl acetate, and the solvent is dichloromethane or trichloromethane.
Preferably, the mass fraction of the solvent in the solution a in the step 1) is 70% or 90%.
The surfactant in the step 2) is one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, triton-100, polyvinyl alcohol, gelatin, gum arabic, Tween 80 and span 80.
Preferably, the mass fraction of surfactant in solution B in step 2) is 0.5%, 0.7%, or 2%.
Preferably, the stirring rate in step 4) is 600rmp, 800rmp or 1000rpm and the temperature is 35 ℃, 45 ℃ or 55 ℃.
Preferably, the curing temperature in the step 9) is 40 ℃, 50 ℃ or 60 ℃, and the curing time is 12h, 15h or 24 h.
Preferably, in the self-lubricating coating, the mass fraction of the reinforcing phase is 5% or 15%, the mass fraction of the lubricating phase is 5% or 20%, and the mass fraction of the resin is 70%.
The invention has the beneficial effects that:
1. the invention can effectively solve the current situation that the lubricating oil is used for lubricating a friction interface in the prior art, enables the solid coating material to show the characteristic of oil lubrication in the lubricating process, simultaneously avoids various defects of an external oil lubricating system, and enriches and widens the application field of the resin-based coating.
2. The capsule containing the lubricant is applied to the preparation of the self-lubricating coating, the capsule containing the lubricant is broken in the friction process, the lubricant flows out, and a lubricating oil film is formed on a friction interface, so that the lubricating property of the coating is greatly improved; on the other hand, the capsule cavity left on the surface of the coating after the lubricant flows out can store abrasive dust and abrasive particles, and the plowing effect caused by the abrasive dust and the abrasive particles is effectively avoided.
Drawings
FIG. 1 is an SEM photograph of PAO/PS microcapsules;
FIG. 2 is a pictorial representation of a self-lubricating coating made from the PAO/PS microcapsules of FIG. 1;
FIG. 3 is the coefficient of friction of the self-lubricating coating of the microcapsules of FIG. 1;
fig. 4 is an SEM photograph of linseed oil/PS + polyvinyl acetate nanocapsules;
FIG. 5 is the coefficient of friction of the self-lubricating coating of the nanocapsule of FIG. 4.
Detailed Description
The invention provides an ultra-low friction coefficient self-lubricating coating and a preparation method thereof, and the invention is further described in detail by combining the accompanying drawings and specific embodiments:
example 1
(1) A solvent evaporation method is adopted to prepare a micron capsule with a core material of poly α olefin (PAO 6 for short) and a wall material of polystyrene (PS for short).
Adding 4g of PAO6 and 2g of PS into 40m of L of dichloromethane solvent, mixing, and uniformly stirring by magnetic force to obtain a solution A, wherein the mass fraction of the dichloromethane in the solution A is 89.83%, and the mass percentage of a lubricant to a polymer is 1:0.5, preparing a mixed aqueous solution B of L m of gelatin and polyvinyl alcohol, wherein the mass fraction of the gelatin is 0.2%, and the mass fraction of the polyvinyl alcohol is 0.5%, adding the solution A into the solution B at one time to form a microemulsion under the mechanical stirring condition of 600rpm, wherein the mass percentage of the solution A to the solution B in the microemulsion is 1:4, reacting the microemulsion at 45 ℃ for 4h to completely volatilize the dichloromethane, collecting after filtration, repeatedly washing with deionized water, drying at 25 ℃ for 24h to obtain the PS microcapsules containing PAO6, and carrying out characterization on the prepared microcapsules by a scanning electron microscope, wherein the particle size of the prepared microcapsules is about 2 mu m, the capsule wall has good coating performance, and the capsule wall thickness is 15nm, as shown in figure 1.
(2) And preparing the self-lubricating coating.
0.5g micron capsule and 0.17g carbon fiber are added into 3g epoxy resin (abbreviated as EP) liquid, and stirred for 20min at room temperature to form good suspension. And removing air bubbles in a vacuum drying oven to obtain slurry, wherein the mass fraction of the microcapsules in the slurry is 13.62%, the mass fraction of the carbon fibers is 4.63%, and the mass fraction of the epoxy resin is 81.74%. And (3) spin-coating the slurry on a bearing steel substrate by using spin-coating equipment, and curing for 24h at 25 ℃ to obtain the self-lubricating coating shown in figure 2.
(3) Lubrication Performance testing of self-lubricating coatings
And testing the self-lubricating coating on a UMT-5 friction wear testing machine, wherein the contact mode is point contact. As shown in FIG. 3, the self-lubricating coating has a coefficient of friction of about 0.018, a load of 3N and a speed of 48mm/s during the test.
Example 2
(1) The solvent evaporation method is adopted to prepare the nano capsule with the linseed oil as the core material and PS and polyvinyl acetate as the wall material.
Adding 2g PS of 6g linseed oil and 0.5g polyvinyl acetate into 60m L trichloromethane, mixing the mixture by magnetic stirring to obtain a solution A, wherein the mass fraction of the trichloromethane in the solution A is 91.37%, and the mass percentage of a lubricant to a polymer is 1:1.42, preparing a polyvinyl alcohol aqueous solution B with the mass fraction of 200m L of 0.5%, adding the solution A into the solution B at one time to form a microemulsion under the mechanical stirring condition of 800rpm, wherein the mass percentage of the solution A to the solution B in the microemulsion is 1:3, and the microemulsion reacts at 45 ℃ for 4 hours to completely volatilize the trichloromethane, collecting the solution after filtering, repeatedly washing the solution with deionized water, and drying the solution A at 25 ℃ for 24 hours to obtain a nano capsule containing the linseed oil.
(2) And preparing the self-lubricating coating.
0.4g of nanocapsule, 0.1g of graphene and 0.1g of glass fibre were added to 3g of EP liquid and stirred at room temperature for 20min to form a good suspension. And then, removing bubbles in a vacuum drying oven to obtain slurry, wherein the mass fraction of the nanocapsules and the graphene as a lubricating phase in the slurry is 13.89%, the mass fraction of the glass fibers is 2.78%, and the mass fraction of the resin is 83.33%. And spin-coating the slurry on a bearing steel substrate by using spin-coating equipment, and curing for 24 hours at 25 ℃ to obtain the self-lubricating coating.
(3) Lubrication Performance testing of self-lubricating coatings
And (3) testing the self-lubricating coating on a Plint friction wear testing machine in a surface contact mode. As shown in FIG. 5, the friction coefficient of the self-lubricating coating is about 0.03, and during the experiment, the load is 600N and the speed is 140 mm/s.
Example 3
(1) The solvent evaporation method is adopted to prepare the micron capsule with the core material of synthetic lubricating oil (SN 0w-20 for short) and the wall material of PS.
Adding 2g SN0w-20 and 2g PS into 50m L dichloromethane solvent for mixing, and performing magnetic stirring uniformly to obtain solution A, wherein the mass fraction of dichloromethane in the solution A is 94.31%, and the mass percentage of a lubricant to a polymer is 1:1. preparing 200m L Tween 80 and arabic gum mixed aqueous solution B, wherein the mass fraction of Tween 80 is 1% and the mass fraction of arabic gum is 0.1%, adding the solution A into the solution B at one time under the mechanical stirring condition of 700rpm to form microemulsion, wherein the mass percentage of the solution A to the solution B in the microemulsion is 1:4, reacting the microemulsion at 35 ℃ for 4h to completely volatilize dichloromethane, filtering and collecting, repeatedly washing with deionized water, and drying at 25 ℃ for 24h to obtain PS micron capsules containing SN0w-20, and the prepared micron capsules have the particle size of about 200 microns, are dense in capsule walls, and have good coating performance.
(2) And preparing the self-lubricating coating.
0.8g of microcapsules of micron size, 0.1g of silicon nitride were added to 3g of EP liquid and stirred for 20min at room temperature to form a good suspension. Then, after removing bubbles in a vacuum drying oven, slurry was obtained in which the mass fraction of the microcapsules was 20.51%, the mass fraction of the silicon nitride was 2.56%, and the mass fraction of the EP was 61.22%. And spin-coating the slurry on a bearing steel substrate by using spin-coating equipment, and curing for 18h at 40 ℃ to obtain the self-lubricating coating.
(3) Lubrication Performance testing of self-lubricating coatings
And (3) testing the self-lubricating coating on a Plint friction wear testing machine in a surface contact mode. The friction coefficient of the self-lubricating coating is about 0.04, and during the experiment, the load is 1310N, and the speed is 140 mm/s.
Example 4
(1) The solvent evaporation method is adopted to prepare the nano capsule with the core material of paraffin oil and the wall material of polymethyl methacrylate.
Weighing paraffin oil and polymethyl methacrylate according to the mass ratio of 1: and 9, adding paraffin oil and polymethyl methacrylate into a dichloromethane solvent, mixing, and uniformly stirring by magnetic force to obtain a solution A, wherein the mass fraction of dichloromethane in the solution A is 30%. Preparing a sodium dodecyl benzene sulfonate aqueous solution B, wherein the mass fraction of the sodium dodecyl benzene sulfonate is 0.1%. And under the condition of mechanical stirring at 1000rpm, adding the solution A into the solution B at one time to form a microemulsion, wherein the mass percentage of the solution A to the solution B in the microemulsion is 1:7, reacting the microemulsion for 4 hours at 55 ℃ to completely volatilize dichloromethane, filtering, collecting, repeatedly washing with deionized water, and drying at 25 ℃ for 24 hours to obtain the polymethyl methacrylate nanocapsule containing paraffin oil.
(2) And preparing the self-lubricating coating.
Adding the nano-capsules and the glass fibers into the phenolic resin, and stirring for 20min at room temperature to form a good suspension. And then removing bubbles in a vacuum drying oven to obtain slurry, wherein the mass fraction of the nanocapsules in the slurry is 5%, the mass fraction of the glass fibers is 50%, and the mass fraction of the phenolic resin is 45%. And spin-coating the slurry on a bearing steel substrate by using spin-coating equipment, and curing for 15h at 60 ℃ to obtain the self-lubricating coating.
Example 5
(1) The solvent evaporation method is adopted to prepare the nano capsule with the core material of paraffin oil and the wall material of polymethyl methacrylate.
Weighing paraffin oil and polymethyl methacrylate according to a mass ratio of 4: adding paraffin oil and polymethyl methacrylate into a trichloromethane solvent for mixing, and uniformly stirring by magnetic force to obtain a solution A, wherein the mass fraction of the trichloromethane in the solution A is 70%. Preparing a sodium dodecyl benzene sulfonate aqueous solution B, wherein the mass fraction of the sodium dodecyl benzene sulfonate is 2%. And under the condition of mechanical stirring at 2000rpm, adding the solution A into the solution B at one time to form a microemulsion, wherein the mass percentage of the solution A to the solution B in the microemulsion is 1:1, reacting the microemulsion at 70 ℃ for 2.5 hours to completely volatilize dichloromethane, filtering, collecting, repeatedly washing with deionized water, and drying at 25 ℃ for 24 hours to obtain the polymethyl methacrylate nanocapsule containing the paraffin oil.
(2) And preparing the self-lubricating coating.
Adding the nano-capsules and the glass fibers into the phenolic resin, and stirring for 20min at room temperature to form a good suspension. And then removing air bubbles in a vacuum drying oven to obtain slurry, wherein the mass fraction of the nanocapsules in the slurry is 30%, the mass fraction of the glass fibers is 15%, and the mass fraction of the phenolic resin is 55%. And spin-coating the slurry on a bearing steel substrate by using spin-coating equipment, and curing for 10 hours at 100 ℃ to obtain the self-lubricating coating.
Example 6
(1) The solvent evaporation method is adopted to prepare the nano capsule with the core material of paraffin oil and the wall material of polymethyl methacrylate.
Weighing paraffin oil and polymethyl methacrylate according to the mass ratio of 1: and 5, adding paraffin oil and polymethyl methacrylate into a trichloromethane solvent for mixing, and uniformly stirring by magnetic force to obtain a solution A, wherein the mass fraction of the trichloromethane in the solution A is 50%. Preparing a sodium dodecyl benzene sulfonate aqueous solution B, wherein the mass fraction of the sodium dodecyl benzene sulfonate is 5%. And under the condition of mechanical stirring at 500rpm, adding the solution A into the solution B at one time to form a microemulsion, wherein the mass percentage of the solution A to the solution B in the microemulsion is 1:2, reacting the microemulsion for 7 hours at 25 ℃ to completely volatilize dichloromethane, filtering, collecting, repeatedly washing with deionized water, and drying at 25 ℃ for 24 hours to obtain the polymethyl methacrylate nanocapsule containing paraffin oil.
(2) And preparing the self-lubricating coating.
Adding the nano-capsules, the talcum powder and the glass fiber into the phenolic resin, and stirring for 20min at room temperature to form a good suspension. And then removing air bubbles in a vacuum drying oven to obtain slurry, wherein the mass fraction of the nanocapsules and the talcum powder in the slurry is 35%, the mass fraction of the glass fiber is 45%, and the mass fraction of the phenolic resin is 20%. And (3) spin-coating the slurry on a bearing steel substrate by using spin-coating equipment, and curing for 30h at 60 ℃ to obtain the self-lubricating coating.
Example 7
(1) A solvent evaporation method is adopted to prepare a micron capsule with a PAO6 core material and a PS wall material.
Weighing PAO6 and PS in a mass ratio of 2: 1, adding the mixture into a dichloromethane solvent, and uniformly stirring by magnetic force to obtain a solution A, wherein the mass fraction of dichloromethane in the solution A is 90%. Preparing a mixed aqueous solution B of polyvinyl alcohol, wherein the mass fraction of the polyvinyl alcohol is 0.05%. And under the condition of mechanical stirring at 300rpm, adding the solution A into the solution B at one time to form a microemulsion, wherein the mass percentage of the solution A to the solution B in the microemulsion is 1:4, reacting the microemulsion for 4 hours at 45 ℃ to completely volatilize dichloromethane, filtering, collecting, repeatedly washing with deionized water, and drying at 25 ℃ for 24 hours to obtain the PS micron capsule containing PAO 6. The prepared microcapsules were characterized by scanning electron microscopy.
(2) And preparing the self-lubricating coating.
Adding the microcapsules, the carbon fibers and the nano ceramic powder into the EP liquid, and stirring at room temperature for 20min to form a good suspension. And then removing bubbles in a vacuum drying oven to obtain slurry, wherein the mass fraction of the microcapsules in the slurry is 20%, the mass fraction of the carbon fibers and the nano ceramic powder is 10%, and the mass fraction of the epoxy resin is 70%. And spin-coating the slurry on a bearing steel substrate by using spin-coating equipment, and curing for 12h at 50 ℃ to obtain the self-lubricating coating.
Claims (9)
1. An ultra-low friction coefficient self-lubricating coating, which consists of resin, a reinforcing phase and a lubricating phase, and is characterized in that the lubricating phase comprises a capsule containing a lubricant;
preparing the capsule by using a lubricant as a capsule core and a polymer as a capsule wall; the lubricant is composed of one or more of mineral lubricating oil, synthetic lubricating oil, animal lubricating oil and ionic liquid; the polymer is one or more of polystyrene, polymethyl methacrylate, polysulfone and polyvinyl acetate;
the capsule is a micron capsule or a nanometer capsule, the particle size of the capsule is 100nm-300 μm, and the wall thickness is 10nm-40 μm;
in the self-lubricating coating, the mass fraction of the reinforcing phase is 0.1-50%, the mass fraction of the lubricating phase is 1-35%, and the mass fraction of the resin is 20-85%.
2. The ultra-low friction coefficient self-lubricating coating according to claim 1, wherein the lubricating phase further comprises any one or more of graphene, graphite, graphene oxide, graphite fluoride, polytetrafluoroethylene, talc and molybdenum disulfide;
the resin is composed of any one or more of epoxy resin, phenolic resin and organic silicon resin;
the reinforcing phase is composed of any one or more of carbon fiber, glass fiber, silicon nitride, copper-zinc alloy powder, nano ceramic powder and polyimide.
3. The ultra-low coefficient of friction self-lubricating coating of claim 1, wherein in the self-lubricating coating, the mass fraction of the reinforcing phase is 10%, the mass fraction of the lubricating phase is 20%, and the mass fraction of the resin is 70%.
4. The method for preparing the self-lubricating coating with the ultralow friction coefficient as set forth in claim 1, is characterized by comprising the following steps:
1) respectively weighing a lubricant and a polymer, wherein the mass ratio of the lubricant to the polymer is 1 (0.25-9);
2) adding a lubricant and a polymer into a solvent, and uniformly stirring to obtain a solution A, wherein the mass fraction of the solvent in the solution A is 30-95%;
3) adding a surfactant into deionized water to form a solution B, wherein the mass fraction of the surfactant in the solution B is 0.05-5%;
4) under the condition of stirring, adding the solution A into the solution B at one time to form a microemulsion, volatilizing the solvent at a certain temperature, filtering, washing and drying to obtain the capsule, wherein the mass ratio of the solution A to the solution B in the microemulsion is 1 (2.5-10), the stirring speed is 100-2000rpm, and the temperature is 25-70 ℃;
5) the capsule is used as a lubricating phase or the capsule and any one or more of graphene, graphite, graphene oxide, graphite fluoride, polytetrafluoroethylene and molybdenum disulfide are mixed to be used as the lubricating phase;
6) stirring and mixing the lubricating phase, the reinforcing phase and the resin uniformly to form a suspension;
7) removing air bubbles in the suspension in the step 6) to obtain slurry;
8) coating the slurry of the step 7) on a substrate;
9) and (3) curing the matrix obtained in the step 8) to obtain the self-lubricating coating, wherein the curing temperature is 25-100 ℃, and the curing time is 10-48 h.
5. The method for preparing the self-lubricating coating with ultralow friction coefficient according to claim 4, wherein the solvent is dichloromethane or trichloromethane.
6. The method for preparing the self-lubricating coating with ultralow friction coefficient according to claim 4, wherein the mass fraction of the solvent in the solution A in the step 1) is 70% or 90%.
7. The method for preparing self-lubricating coating with ultra-low friction coefficient according to claim 4, wherein the surfactant in step 2) is one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, triton-100, polyvinyl alcohol, gelatin, gum arabic, Tween-80 and span-80.
8. The method for preparing the self-lubricating coating with the ultralow friction coefficient according to claim 4, wherein the mass fraction of the surfactant in the solution B in the step 2) is 0.5%, 0.7% or 2%.
9. The method for preparing self-lubricating coating with ultralow friction coefficient according to claim 4, wherein the stirring speed in step 4) is 600rmp, 800rmp or 1000rpm, the temperature is 35 ℃, 45 ℃ or 55 ℃, the curing temperature in step 9) is 40 ℃, 50 ℃ or 60 ℃, and the curing time is 12h, 15h or 24 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735154.8A CN110564260B (en) | 2019-08-09 | 2019-08-09 | Self-lubricating coating with ultralow friction coefficient and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735154.8A CN110564260B (en) | 2019-08-09 | 2019-08-09 | Self-lubricating coating with ultralow friction coefficient and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110564260A CN110564260A (en) | 2019-12-13 |
| CN110564260B true CN110564260B (en) | 2020-08-04 |
Family
ID=68774912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910735154.8A Active CN110564260B (en) | 2019-08-09 | 2019-08-09 | Self-lubricating coating with ultralow friction coefficient and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110564260B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101082B (en) * | 2019-12-25 | 2021-02-02 | 杭州安耐特实业有限公司 | Metal ceramic composite material for new energy automobile brake pad and preparation method thereof |
| CN111621218A (en) * | 2020-04-13 | 2020-09-04 | 苏州东特绝缘科技有限公司 | Self-lubricating polyurethane insulating coating and enameled wire |
| CN112980285A (en) * | 2021-02-23 | 2021-06-18 | 黑龙江省玖耀启铭科技有限公司 | Self-lubricating wear-resistant sealing coating |
| CN113025410A (en) * | 2021-03-17 | 2021-06-25 | 清华大学 | Novel micro-nano multi-component composite snow wax and preparation process thereof |
| CN113321965A (en) * | 2021-05-28 | 2021-08-31 | 清华大学 | Heat-triggered microcapsule, intelligent self-lubricating composite material containing heat-triggered microcapsule and preparation method of intelligent self-lubricating composite material |
| CN113214725A (en) * | 2021-06-24 | 2021-08-06 | 中国科学院兰州化学物理研究所 | Solid lubricating protective coating and preparation method and application thereof |
| CN117089117B (en) * | 2023-10-17 | 2024-02-13 | 季华实验室 | Graphite hybrid microcapsule and preparation method thereof, fluorine-based material and preparation method thereof |
| CN117186765B (en) * | 2023-11-08 | 2024-01-30 | 成都石大力盾科技有限公司 | Solid self-lubricating coating and preparation method thereof |
| CN117659608B (en) * | 2024-01-31 | 2024-04-02 | 季华实验室 | Microcapsule self-lubricating material and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103060066A (en) * | 2013-01-29 | 2013-04-24 | 安徽工业大学 | Microencapsulated tungsten disulfide dry-film lubricant |
| CN103952693A (en) * | 2014-04-24 | 2014-07-30 | 镇江市高等专科学校 | Preparation method of molybdenum disulfide self-lubricating composite coating and self-lubricating slider |
| CN104087391A (en) * | 2014-07-29 | 2014-10-08 | 泰州市嘉迪新材料有限公司 | Urea formaldehyde resin microcapsule lubrication oil, lubrication oil coating material and preparation method of lubrication oil |
| CN110000069A (en) * | 2019-05-13 | 2019-07-12 | 山东大学 | A kind of molybdenum disulfide/aluminium oxide/graphite lubrication antifriction composite coating and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60260477A (en) * | 1984-06-05 | 1985-12-23 | 三菱重工業株式会社 | Manufacture of bearing material |
-
2019
- 2019-08-09 CN CN201910735154.8A patent/CN110564260B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103060066A (en) * | 2013-01-29 | 2013-04-24 | 安徽工业大学 | Microencapsulated tungsten disulfide dry-film lubricant |
| CN103952693A (en) * | 2014-04-24 | 2014-07-30 | 镇江市高等专科学校 | Preparation method of molybdenum disulfide self-lubricating composite coating and self-lubricating slider |
| CN104087391A (en) * | 2014-07-29 | 2014-10-08 | 泰州市嘉迪新材料有限公司 | Urea formaldehyde resin microcapsule lubrication oil, lubrication oil coating material and preparation method of lubrication oil |
| CN110000069A (en) * | 2019-05-13 | 2019-07-12 | 山东大学 | A kind of molybdenum disulfide/aluminium oxide/graphite lubrication antifriction composite coating and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| Enhancement of friction performance enabled by a synergetic effect between graphene oxide and molybdenum disulfide;Yanfei Liu等;《Carbon》;20190805;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110564260A (en) | 2019-12-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110564260B (en) | Self-lubricating coating with ultralow friction coefficient and preparation method thereof | |
| CN108395657B (en) | Self-repairing self-lubricating material and preparation method thereof | |
| He et al. | Friction and wear of MoO3/graphene oxide modified glass fiber reinforced epoxy nanocomposites | |
| CN107474258B (en) | Porous oil-containing composite lubricating material and preparation method thereof | |
| CN112915936B (en) | High-temperature-resistant high-dispersion organic shell microcapsule and preparation method thereof | |
| CN111569794B (en) | Self-repairing and self-lubricating type dual-functional microcapsule and preparation method thereof | |
| CN108148650A (en) | Two-dimensional material micro-nano piece and the compound lubricating oil of carbon quantum dot and preparation method thereof | |
| CN104927354A (en) | Polyimide-based self-lubricating composite material and preparation method thereof | |
| CN114645451B (en) | Layered composite material and preparation method thereof, self-lubricating fiber fabric composite material and preparation method and application thereof | |
| CN111876223B (en) | Modified carbon nanotube ionic liquid lamellar liquid crystal lubricant and preparation method thereof | |
| CN110681324A (en) | Graphene oxide hybrid multi-wall self-lubricating micro-nano capsule and preparation method thereof | |
| CN106967484B (en) | Phenolic epoxy resin solid lubricating block and preparation method thereof | |
| CN109385322B (en) | Preparation method of ultra-low friction hexagonal boron nitride fluid lubricant | |
| CN108753106B (en) | Nano hybrid material modified epoxy resin self-lubricating composite coating and preparation method thereof | |
| CN109096837A (en) | A kind of preparation method of the high-antiwear self-lubricating coating of PMMA modified ptfe | |
| Xu et al. | Enhanced superlubricity of 1, 3-diketone oil by doping polydopamine functionalized silica nano-additive | |
| CN108410169A (en) | Compound polyimide material and preparation method thereof | |
| CN109745928B (en) | Preparation method and application of oil-containing microcapsule | |
| Peng et al. | A facile approach for preparing biomimetic polymer macroporous structures with petal or lotus effects | |
| CN109593442A (en) | A kind of selfreparing based on micro- texture surface, self-lubricating coat in use preparation method | |
| CN104229853A (en) | Preparation method of self-lubrication material nanometer calcium fluoride for ceramic cutting tool | |
| Li et al. | Effect of pH on the liquid superlubricity between Si 3 N 4 and glass achieved with phosphoric acid | |
| Li et al. | Polydopamine-modified polysulfone/silica double-walled heat-resistant microcapsules efficiently improve the tribological properties of polyamides | |
| CN110203960A (en) | A kind of rare earth oxysulfide and preparation method thereof as lube oil additive | |
| Cheng et al. | Preparation of self-lubricating porous alumina ceramics with PMMA/PAO6 microcapsules and their tribological properties |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |