CN117363138A - Low-friction phenolic aldehyde bonding type solid self-lubricating coating and preparation method thereof - Google Patents
Low-friction phenolic aldehyde bonding type solid self-lubricating coating and preparation method thereof Download PDFInfo
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- CN117363138A CN117363138A CN202311504626.1A CN202311504626A CN117363138A CN 117363138 A CN117363138 A CN 117363138A CN 202311504626 A CN202311504626 A CN 202311504626A CN 117363138 A CN117363138 A CN 117363138A
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- 238000000576 coating method Methods 0.000 title claims abstract description 47
- 239000011248 coating agent Substances 0.000 title claims abstract description 45
- 239000007787 solid Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title abstract description 7
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000005011 phenolic resin Substances 0.000 claims abstract description 24
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 24
- 239000000945 filler Substances 0.000 claims abstract description 16
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 14
- 239000000314 lubricant Substances 0.000 claims abstract description 13
- 239000002105 nanoparticle Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000002131 composite material Substances 0.000 claims description 22
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 22
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 20
- 238000000227 grinding Methods 0.000 claims description 15
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical group S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 239000002270 dispersing agent Substances 0.000 claims description 11
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 11
- 238000009736 wetting Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000004408 titanium dioxide Substances 0.000 claims description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 6
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000010907 mechanical stirring Methods 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- AHVYPIQETPWLSZ-UHFFFAOYSA-N N-methyl-pyrrolidine Natural products CN1CC=CC1 AHVYPIQETPWLSZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims 5
- 230000001070 adhesive effect Effects 0.000 claims 5
- 238000005461 lubrication Methods 0.000 abstract description 7
- 239000003921 oil Substances 0.000 abstract description 5
- 229910052723 transition metal Inorganic materials 0.000 abstract description 2
- 150000003624 transition metals Chemical class 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000002671 adjuvant Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- -1 modified phenolic aldehyde Chemical class 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003421 catalytic decomposition reaction Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920013639 polyalphaolefin Polymers 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- MHDVGSVTJDSBDK-UHFFFAOYSA-N dibenzylether Substances C=1C=CC=CC=1COCC1=CC=CC=C1 MHDVGSVTJDSBDK-UHFFFAOYSA-N 0.000 description 1
- FMQXRRZIHURSLR-UHFFFAOYSA-N dioxido(oxo)silane;nickel(2+) Chemical compound [Ni+2].[O-][Si]([O-])=O FMQXRRZIHURSLR-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/38—Paints containing free metal not provided for above in groups C09D5/00 - C09D5/36
-
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0862—Nickel
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3009—Sulfides
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention relates to a low-friction phenolic aldehyde bonding type solid self-lubricating coating which is prepared from the following components in parts by mass: 72% -96.5% of phenolic resin, 1% -10% of solid lubricant, 1% -10% of functional nano filler, 1% -5% of hard nano particles and 0.5% -3% of auxiliary agent. Meanwhile, the invention also discloses a preparation method of the coating. According to the invention, the friction interface friction film structure is regulated by utilizing the synergistic effect of the multi-element particles containing transition metal, so that the phenolic aldehyde bonding type solid self-lubricating coating with low friction coefficient and wear rate is obtained, and the use requirement of the field of coating materials of moving components under severe oil lubrication working conditions can be met.
Description
Technical Field
The invention relates to the field of engineering materials, in particular to a low-friction phenolic aldehyde bonding type solid self-lubricating coating and a preparation method thereof.
Background
With the continuous development of industrial technology, the service life of the transmission part is continuously prolonged, higher requirements are put forward on the mechanical and tribological properties of mechanical wear-resistant parts, and polymer coatings with excellent self-lubricating property and wear resistance and reliability are designed and developed to gradually become research hot spots of various countries.
Phenolic resin (PF) is a high molecular material with benzene rings and methylene bonds and dibenzyl ether bonds connected, and has excellent heat resistance. PF based coatings are often used to protect metal parts due to their adhesion to the metal substrate. However, phenolic resin has high brittleness, poor toughness and poor wear resistance, so that the wear life of the phenolic resin is reduced, and the application of the lubricating coating under severe working conditions is limited. At present, transition metal is often introduced as a lubricating oil additive to induce polyolefin oil dehydrogenation reaction so as to promote tribochemical and tribophysical reactions, thereby promoting formation of a friction film and improving tribological properties, but the effect of the friction film on improving wear rate is not obvious.
Therefore, in order to achieve boundary lubrication under severe working conditions and reduce wear rate, the coating material needs to meet both low friction coefficient and high wear resistance.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-wear-resistance low-friction phenolic aldehyde bonding type solid self-lubricating coating.
The invention aims to provide a preparation method of the low-friction phenolic aldehyde bonding type solid self-lubricating coating.
In order to solve the problems, the low-friction phenolic aldehyde bonding type solid self-lubricating coating provided by the invention is characterized in that: the coating is prepared from the following components in percentage by mass: 72 to 96.5 percent of phenolic resin, 1 to 10 percent of solid lubricant, 1 to 10 percent of functional nano filler, 1 to 5 percent of hard nano particles and 0.5 to 3 percent of auxiliary agent.
The phenolic resin is thermosetting liquid phenolic resin.
The solid lubricant is molybdenum disulfide powder, and the granularity of the solid lubricant is 0.5-1.5 um.
The functional nano filler is submicron nickel powder and derivatives thereof, and the granularity of the functional nano filler is 0.5-1.5 um.
The hard nano particles are titanium dioxide, and the granularity of the hard nano particles is 200-300 nm.
The auxiliary agent consists of 0.5-1 part of wetting dispersant and 0.5-1 part of flatting agent by mass.
The preparation method of the low-friction phenolic aldehyde bonding type solid self-lubricating coating is characterized by comprising the following steps of: firstly, weighing according to the proportion; then, adding the functional nano filler, the hard nano particles, the solid lubricant and the auxiliary agent into the phenolic resin at the same time, and preparing the modified phenolic composite material through mechanical stirring and three-roller grinding; the modified phenolic composite material is prepared by adding 25-75% of the modified phenolic composite material into a mixed organic solvent, stirring and mixing for 5-30 min, and filtering.
The condition of mechanical stirring is that a negative pressure high-speed stirrer is adopted, and stirring is continuously carried out for 5-10 min at the temperature of 25 ℃ and the rotating speed of 1500-2000 rpm.
The three-roller grinding condition is that a three-roller grinder is adopted, the grinding is carried out twice, the first grinding is carried out until the fineness of the material is 15-30 um, and the second grinding is carried out until the fineness of the material is 5-10 um.
The mixed organic solvent is methanol, absolute ethanol or n-butanol and toluene, ethylbenzene or NMP according to the ratio of 1:1 to 5:1, and uniformly mixing the obtained mixed solution in a volume ratio.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, through the formula optimization of the functional nano filler, the hard nano particle titanium dioxide and the solid lubricant molybdenum disulfide, the catalytic decomposition effect of the functional nano filler, the ball bearing effect of the titanium dioxide and the easy shearing lubrication characteristic of the molybdenum disulfide are skillfully utilized to cooperatively promote the friction physical and chemical effects of friction interface phenolic resin and the filler, and a double-layer friction film with an upper layer of a carbon base layer and a lower layer of an organic-inorganic hybrid layer is generated on the surface of the dual metal.
2. Experiments prove that the phenolic aldehyde bonding type solid self-lubricating coating provided by the invention has low friction coefficient and wear rate under severe oil lubrication conditions.
Detailed Description
The low-friction phenolic aldehyde bonding type solid self-lubricating coating is prepared from the following components in percentage by mass: 72 to 96.5 percent of phenolic resin, 1 to 10 percent of solid lubricant, 1 to 10 percent of functional nano filler, 1 to 5 percent of hard nano particles and 0.5 to 3 percent of auxiliary agent.
Wherein: the phenolic resin is thermosetting liquid phenolic resin.
The solid lubricant is molybdenum disulfide powder with the granularity of 0.5-1.5 um.
The functional nano filler is submicron nickel powder and derivatives thereof (such as nickel oxide, nickel silicate, nickel sulfide and the like), and the granularity of the functional nano filler is 0.5-1.5 um.
The hard nano particles are titanium dioxide, and the granularity is 200-300 nm.
The auxiliary agent consists of 0.5-1 part of wetting dispersant and 0.5-1 part of flatting agent according to the weight part (g). The wetting dispersant is BYK330; the leveling agent was BYK352.
The preparation method of the low-friction phenolic aldehyde bonding type solid self-lubricating coating comprises the following steps:
firstly, weighing according to the proportion; then adding the functional nano filler, the hard nano particles, the solid lubricant and the auxiliary agent into the phenolic resin at the same time, and continuously stirring for 5-10 min at the temperature of 25 ℃ at the rotating speed of 1500-2000 rpm by adopting a negative pressure high-speed stirrer to prepare a premix; adding the premix into a three-roller grinder for grinding twice, wherein the fineness of the material is 15-30 um in the first grinding and the fineness of the material is 5-10 um in the second grinding, so as to obtain the modified phenolic composite material. The modified phenolic composite material is added into a mixed organic solvent with the mass fraction of 25-75%, wherein the mixed organic solvent refers to methanol, absolute ethyl alcohol or n-butyl alcohol and toluene, ethylbenzene or NMP according to the weight ratio of 1:1 to 5:1 (ml/ml) and uniformly mixing the obtained mixed solution. Stirring and mixing for 5-30 min, and filtering to obtain the low-friction phenolic aldehyde bonding type solid self-lubricating coating.
The obtained coating is sprayed on the surface of a substrate (such as an aluminum plate) and is cured for 1h at 150 ℃ to prepare the modified phenolic aldehyde composite coating with the thickness of 25-40 um and the surface roughness of 0.10-0.20 um.
Example 1
3g of nickel powder, 3g of titanium dioxide, 5g of molybdenum disulfide, 87.5g of liquid phenolic resin and 1.5g of auxiliary agent (1 g of wetting dispersant and 0.5g of flatting agent) are added into a negative pressure high-speed stirrer, and stirring is carried out continuously at 25 ℃ for 10min at a rotating speed of 1500 revolutions per minute; adding the premix into a three-roller grinder, grinding to the standard fineness of 5-10 um, and then transferring to a blast drying oven at 150 ℃ for standing for 1h to prepare the modified phenolic composite material. Adding the modified phenolic composite material into the volume fraction of 2:1, stirring and mixing for 10min, and filtering to obtain the low-friction phenolic aldehyde bonding type solid self-lubricating coating.
The obtained coating is sprayed on the surface of a matrix, and then cured for 1h at 150 ℃ to prepare the modified phenolic aldehyde composite coating with the thickness of 25-40 um and the surface roughness of 0.10-0.20 um, and then the tribological performance of the modified phenolic aldehyde composite coating is examined.
Example 2
The method of example 1 was repeated using 5g nickel powder, 3g titanium dioxide, 5g molybdenum disulfide, 85.5g liquid phenolic resin and 1.5g adjuvant (1 g wetting dispersant, 0.5g leveling agent), to produce a modified phenolic composite coating, which was then examined for tribological properties.
Example 3
The method of example 1 was repeated using 5g nickel powder, 5g titanium dioxide, 5g molybdenum disulfide, 83.5g liquid phenolic resin and 1.5g adjuvant (1 g wetting dispersant, 0.5g leveling agent), to produce a modified phenolic composite coating, which was then examined for tribological properties.
Comparative example 1
The procedure of example 1 was repeated using 98.5g of liquid phenolic resin and 1.5g of auxiliary agent (1 g of wetting dispersant, 0.5g of leveling agent) to prepare a modified phenolic composite coating, which was then examined for tribological properties.
Comparative example 2
The method of example 1 was repeated using 5g of molybdenum disulphide, 93.5g of liquid phenolic resin and 1.5g of auxiliary agent (1 g of wetting dispersant, 0.5g of levelling agent), to prepare a modified phenolic composite coating, which was then examined for tribological properties.
Comparative example 3
The method of example 1 was repeated using 5g of titanium dioxide, 5g of molybdenum disulfide, 88.5g of liquid phenolic resin and 1.5g of an auxiliary agent (1 g of a wetting dispersant, 0.5g of a leveling agent) to prepare a modified phenolic composite coating, and then the tribological properties thereof were examined.
Comparative example 4
The method of example 1 was repeated using 3g nickel powder, 5g molybdenum disulfide, 90.5g liquid phenolic resin and 1.5g adjuvant (1 g wetting dispersant, 0.5g leveling agent) to produce a modified phenolic composite coating, which was then examined for tribological properties.
Friction experiments were performed on the above examples 1 to 3 and comparative examples 1 to 4. And testing by a high-speed ring-block testing machine. Machining the coated metal to 50X 10X 4mm 3 The mating part is GCr15 bearing steel. The mating piece was sanded to obtain an average surface roughness ra=0.25.
The test conditions were: the test load was 100N, the sliding speed was 0.2m/s, the duration was 1h, and the formulation was immersed in a cavity filled with Poly Alpha Olefin (PAO) oil. After the friction experiment is finished, the width of the abrasion mark is measured by using an optical microscope, and the abrasion rate is calculated by using a formula.
The wear rate is calculated according to the formula:
wherein L' is the width (mm) of the sample, R is the diameter (mm) of the dual steel ring, W is the width (mm) of the wear scar, F is the normal applied force (N), and L is the sliding distance (m).
The average friction coefficient and wear rate measurement calculation results of the materials prepared in the examples and comparative examples of the present invention are shown in Table 1.
TABLE 1 average coefficient of friction and wear Rate measurements calculated for the materials prepared in examples and comparative examples
| Coefficient of friction | Wear rate (10) -6 mm 3 /Nm) | |
| Example 1 | 0.0108 | 1.476 |
| Example 2 | 0.0161 | 2.552 |
| Example 3 | 0.0136 | 1.891 |
| Comparative example 1 | 0.0982 | 3.991 |
| Comparative example 2 | 0.0361 | 8.812 |
| Comparative example 3 | 0.0214 | 3.640 |
| Comparative example 4 | 0.0307 | 3.417 |
As can be seen from Table 1, the high-toughness phenolic-based composite coating (examples 1-3) applicable to severe oil lubrication conditions has remarkable antifriction and antiwear properties compared with the conventional wear-resistant modified composite materials (comparative examples 1-4), and the wear rate is greatly reduced compared with the wear rate of the conventional wear-resistant modified composite materials.
Therefore, through reasonable formula design, the catalytic decomposition effect of nickel powder, the ball bearing effect of titanium dioxide and the easy-shearing lubrication characteristic of molybdenum disulfide are skillfully utilized, the formation and the generation of a double-layer organic-inorganic hybrid friction film with high bearing capacity and self-lubrication characteristic at a friction interface are cooperatively promoted, the direct scraping of friction pairs is avoided, the friction coefficient of a coating is reduced, and meanwhile, the wear rate of the coating is obviously reduced, so that the service life of the coating is prolonged.
Claims (10)
1. A low-friction phenolic aldehyde bonding type solid self-lubricating coating is characterized in that: the coating is prepared from the following components in percentage by mass: 72% -96.5% of phenolic resin, 1% -10% of solid lubricant, 1% -10% of functional nano filler, 1% -5% of hard nano particles and 0.5% -3% of auxiliary agent.
2. The low friction phenolic adhesive solid self-lubricating coating of claim 1, wherein: the phenolic resin is thermosetting liquid phenolic resin.
3. The low friction phenolic adhesive solid self-lubricating coating of claim 1, wherein: the solid lubricant is molybdenum disulfide powder, and the granularity of the solid lubricant is 0.5-1.5 um.
4. The low friction phenolic adhesive solid self-lubricating coating of claim 1, wherein: the functional nano filler is submicron nickel powder and derivatives thereof, and the granularity of the functional nano filler is 0.5-1.5 um.
5. The low friction phenolic adhesive solid self-lubricating coating of claim 1, wherein: the hard nano particles are titanium dioxide, and the granularity of the hard nano particles is 200-300 nm.
6. The low friction phenolic adhesive solid self-lubricating coating of claim 1, wherein: the auxiliary agent consists of 0.5-1 part of wetting dispersant and 0.5-1 part of flatting agent by mass.
7. The method for preparing the low-friction phenolic aldehyde bonding type solid self-lubricating coating according to one of claims 1 to 6, which is characterized in that: firstly, weighing according to the proportion; then, adding the functional nano filler, the hard nano particles, the solid lubricant and the auxiliary agent into the phenolic resin at the same time, and preparing the modified phenolic composite material through mechanical stirring and three-roller grinding; and adding 25-75% of the modified phenolic composite material into the mixed organic solvent, stirring and mixing for 5-30 min, and filtering to obtain the modified phenolic composite material.
8. The method for preparing the low-friction phenolic aldehyde bonding type solid self-lubricating coating, as claimed in claim 7, is characterized in that: the condition of mechanical stirring is that a negative pressure high-speed stirrer is adopted, and stirring is continuously carried out for 5-10 min at the temperature of 25 ℃ and the rotating speed of 1500-2000 rpm.
9. The method for preparing the low-friction phenolic aldehyde bonding type solid self-lubricating coating, as claimed in claim 7, is characterized in that: the three-roller grinding condition is that a three-roller grinding machine is adopted, the grinding is carried out twice, the first grinding is carried out until the fineness of the material is 15-30 um, and the second grinding is carried out until the fineness of the material is 5-10 um.
10. The method for preparing the low-friction phenolic aldehyde bonding type solid self-lubricating coating, as claimed in claim 7, is characterized in that: the mixed organic solvent is methanol, absolute ethanol or n-butanol and toluene, ethylbenzene or NMP according to the ratio of 1: 1-5: 1, and uniformly mixing the obtained mixed solution in a volume ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311504626.1A CN117363138A (en) | 2023-11-13 | 2023-11-13 | Low-friction phenolic aldehyde bonding type solid self-lubricating coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311504626.1A CN117363138A (en) | 2023-11-13 | 2023-11-13 | Low-friction phenolic aldehyde bonding type solid self-lubricating coating and preparation method thereof |
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| CN117363138A true CN117363138A (en) | 2024-01-09 |
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| CN202311504626.1A Pending CN117363138A (en) | 2023-11-13 | 2023-11-13 | Low-friction phenolic aldehyde bonding type solid self-lubricating coating and preparation method thereof |
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