CN117126586A - Thread seizure preventing coating and preparation method thereof - Google Patents
Thread seizure preventing coating and preparation method thereof Download PDFInfo
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- CN117126586A CN117126586A CN202311397495.1A CN202311397495A CN117126586A CN 117126586 A CN117126586 A CN 117126586A CN 202311397495 A CN202311397495 A CN 202311397495A CN 117126586 A CN117126586 A CN 117126586A
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- 238000000576 coating method Methods 0.000 title claims abstract description 104
- 239000011248 coating agent Substances 0.000 title claims abstract description 100
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 79
- -1 polysiloxane Polymers 0.000 claims abstract description 70
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 65
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 61
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000011737 fluorine Substances 0.000 claims abstract description 50
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 50
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 49
- 239000000945 filler Substances 0.000 claims abstract description 29
- 239000003822 epoxy resin Substances 0.000 claims abstract description 26
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 26
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 25
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000007864 aqueous solution Substances 0.000 claims abstract description 16
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000005977 Ethylene Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 35
- 238000003756 stirring Methods 0.000 claims description 30
- 235000019441 ethanol Nutrition 0.000 claims description 24
- 239000000243 solution Substances 0.000 claims description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000003921 oil Substances 0.000 claims description 18
- 229910021389 graphene Inorganic materials 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 11
- 239000000377 silicon dioxide Substances 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 10
- 239000002244 precipitate Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- 239000005995 Aluminium silicate Substances 0.000 claims description 7
- 239000004593 Epoxy Substances 0.000 claims description 7
- 235000012211 aluminium silicate Nutrition 0.000 claims description 7
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- 239000012153 distilled water Substances 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 4
- 239000013530 defoamer Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 3
- RBNPOMFGQQGHHO-UHFFFAOYSA-N glyceric acid Chemical compound OCC(O)C(O)=O RBNPOMFGQQGHHO-UHFFFAOYSA-N 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims 2
- 229910052623 talc Inorganic materials 0.000 claims 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 230000001680 brushing effect Effects 0.000 claims 1
- 239000000843 powder Substances 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 abstract description 8
- 229920001568 phenolic resin Polymers 0.000 abstract description 8
- 239000005011 phenolic resin Substances 0.000 abstract description 8
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- 239000003960 organic solvent Substances 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 125000000217 alkyl group Chemical group 0.000 abstract description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 3
- 229920006334 epoxy coating Polymers 0.000 abstract description 3
- 230000002209 hydrophobic effect Effects 0.000 abstract description 3
- 230000003449 preventive effect Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 33
- 230000007797 corrosion Effects 0.000 description 33
- 238000012360 testing method Methods 0.000 description 28
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 19
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical group O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 10
- 238000005553 drilling Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- FGZFESWHQXSPJU-UHFFFAOYSA-N 2-methyl-2-(3,3,3-trifluoropropyl)-1,3,5,2,4,6-trioxatrisilinane Chemical compound FC(F)(F)CC[Si]1(C)O[SiH2]O[SiH2]O1 FGZFESWHQXSPJU-UHFFFAOYSA-N 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000005536 corrosion prevention Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000012763 reinforcing filler Substances 0.000 description 3
- 238000009210 therapy by ultrasound Methods 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 125000001153 fluoro group Chemical group F* 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- HMMGMWAXVFQUOA-UHFFFAOYSA-N octamethylcyclotetrasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 HMMGMWAXVFQUOA-UHFFFAOYSA-N 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 2
- 125000005372 silanol group Chemical group 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- WTQAKAPKTROVFY-UHFFFAOYSA-N C[SiH]1O[Si](O[Si](O1)(CCC)F)(F)F Chemical compound C[SiH]1O[Si](O[Si](O1)(CCC)F)(F)F WTQAKAPKTROVFY-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- 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
- C09D163/04—Epoxynovolacs
-
- 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
- C09D5/08—Anti-corrosive paints
-
- 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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- 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)
- Paints Or Removers (AREA)
Abstract
The invention discloses a thread seizure preventive coating and a preparation method thereof, belonging to the technical field of metal surface coatings; the coating comprises the following components in parts by weight: 20-50 parts of phenolic epoxy resin, 0.5-1.5 parts of advection agent, 5-15 parts of curing agent, 15-30 parts of filler, 30-50 parts of ethanol aqueous solution, 2-5 parts of ethylene end-capped fluorine-containing polysiloxane modified graphene oxide and 0.5-2 parts of defoaming agent. According to the invention, the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide is introduced to improve the property of the anti-thread-seizure coating, and part of hydrophilic groups such as carboxyl on the surface of the modified graphene oxide are replaced by hydrophobic alkyl, so that the dispersion stability of the modified graphene oxide in an organic solvent is obviously improved; improves the dispersibility, the adhesive force and the compatibility of the epoxy resin in the phenolic resin, and improves the mechanical and mechanical properties of the epoxy coating of the phenolic resin.
Description
Technical Field
The invention belongs to the technical field of metal surface coatings, and particularly relates to an anti-thread seizure coating and a preparation method thereof.
Background
The demand for energy mineral resources such as petroleum, natural gas, coal and the like is increasing year by year, and the energy consumption is obviously in an ascending stage. As energy consumption increases, areas of early development resources have failed to continue mining. So in order to solve the problem of the resource being exhausted, the prior art further searches and discovers mineral resources in the earth through a coring drilling technology. The coring drilling technology is characterized in that a power source is arranged on the ground surface, and a long drill rod formed by connecting short rods is used for deep drilling into the bottom of a well to perform operation; most of the technology is applied to places with rich mineral resources, and also oil and gas well drilling engineering; and as mining resources develop from shallow development into deeper and more complex land and marine formations, they are also applied to more severe conditions.
The oil core drill is used as an indispensable tool in the oil exploration industry, and the use performance of the oil core drill directly influences the oil drilling efficiency. The petroleum core drill is connected through internal and external threads among the outer pipes to form a longer drill rod which is extended into the underground for working. The damage to the outer tube, which is the most widely used in petroleum drilling, is quite severe, and often occurs at the threaded connection. This presents a number of problems for the exploitation of the subsurface oil, so the connecting threads between the outer tubes are the weakest place in the overall outer tube.
The threads are easy to wear and thread gluing under the action of torque and pressure, so that the surfaces of the thread gluing are pulled, and the thread fasteners are mutually meshed; the maintenance and disassembly are difficult, and the working stability and the service life of the device are seriously affected; and in the drilling environment, the corrosion products of the threaded fastener often cause the thread pair to bite;
the problem of thread pair seizure has become a technical problem to be solved in the field of exploration industry, and therefore, the introduction of new process technologies to solve the above problems and to seek a more viable solution has been eagerly demanded.
Disclosure of Invention
The invention aims to provide a thread seizure preventing coating and a preparation method thereof, which are used for preventing thread seizure of a threaded fastener in the use process.
The invention is realized by the following technical scheme: the anti-thread-biting coating comprises the following components in parts by weight: 20-50 parts of phenolic epoxy resin, 0.5-1.5 parts of advection agent, 5-15 parts of curing agent, 15-30 parts of filler, 30-50 parts of ethanol aqueous solution, 2-5 parts of ethylene end-capped fluorine-containing polysiloxane modified graphene oxide and 0.5-2 parts of defoaming agent;
further, the anti-thread-biting coating comprises the following components in parts by weight: 30 parts of phenolic epoxy resin, 1 part of advection agent, 10 parts of curing agent, 22 parts of filler, 36 parts of ethanol water solution, 3 parts of ethylene-terminated fluorine-containing polysiloxane modified graphene oxide and 1.2 parts of defoaming agent.
The preparation method of the ethylene end-capped fluorine-containing polysiloxane comprises the following steps: adding octamethyl cyclotetrasiloxane and 1, 3-divinyl-1, 3-tetramethyl disiloxane into a reaction container, stirring for 20min, heating to 65-75 ℃ in an oil bath after uniform mixing, dropwise adding concentrated sulfuric acid with the concentration of 75%, and adding methyl trifluoropropyl cyclotrisiloxane after dropwise adding is finished; maintaining the temperature of the oil bath at 65-75 ℃, stirring and reacting for 2 hours, extracting the oil bath from the reaction vessel, naturally cooling to room temperature, and finally adding anhydrous sodium carbonate to neutralize concentrated sulfuric acid; filtering the obtained precipitate with filter paper, and washing the precipitate with plasma water for several times to obtain the product ethylene-terminated fluorine-containing polysiloxane.
The preparation method of the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide comprises the following steps: weighing graphene oxide, absolute ethyl alcohol and sodium hydroxide, and placing the graphene oxide, the absolute ethyl alcohol and the sodium hydroxide in a reaction container, and uniformly dispersing by ultrasonic waves; heating the oil bath to 65-75 ℃, and continuously stirring and reacting for 30min at constant temperature; adding ethylene end-capped fluorine-containing polysiloxane into the system, and dripping deionized water; after the dripping is completed; maintaining the temperature of the oil bath at 65-75 ℃ and continuously stirring for reaction for 24 hours; after the reaction, the solution after the reaction was filtered by a 0.22 μm polytetrafluoroethylene film; and repeatedly washing the precipitate obtained by filtering the polytetrafluoroethylene membrane with a large amount of distilled water after the filtration is completed until the washed distilled water shows neutrality, and finally drying the precipitate in vacuum to obtain the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide.
The preparation method of the anti-thread-seizure coating comprises the following steps: firstly, placing ethylene-terminated fluorine-containing polysiloxane modified graphene oxide in an ethanol aqueous solution, and fully stirring and uniformly mixing;
adding phenolic epoxy resin, a advection agent, a filler and a defoaming agent into the mixture, and uniformly stirring the mixture; and finally adding a curing agent into the mixture, and stirring the mixture uniformly again to finally prepare the coating for preventing the thread from being bitten.
The preparation of the anti-thread seizure coating is completed and applied to threads and further comprises the following steps:
step S1, cleaning a threaded base material;
placing the threads to be coated in acetone, performing ultrasonic treatment for 30min, then wiping off scraps and dust on the surfaces of the threads by using absorbent cotton and absolute ethyl alcohol, finally flushing with plasma water, and drying in a drying oven for standby.
S2, coating the prepared coating;
the prepared solution is uniformly coated on the surface of a threaded substrate through a coater, and the coating thickness is 20-40 mu m.
S3, solidifying and drying;
adopting hot air convection curing, wherein the curing temperature is 100-140 ℃; the curing time was 2h.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide is introduced to improve the property of the anti-thread-seizure coating, and part of hydrophilic groups such as carboxyl on the surface of the modified graphene oxide are replaced by hydrophobic alkyl, so that the dispersion stability of the modified graphene oxide in an organic solvent (phenolic resin) is obviously improved; the dispersibility, the adhesive force and the compatibility of the epoxy resin in the phenolic resin coating are improved, and the mechanical property of the phenolic resin epoxy coating are improved;
2. a large amount of fluorocarbon radicals with low surface energy are introduced into the coating, so that the surface of the coating has low surface energy, and the interlayer interaction between fluorine atoms is low, so that the friction coefficient of the coating is reduced, and good tribological performance is provided for the coating;
3. the modified graphene oxide has silane groups, the silane groups form silanol through hydrolysis, intermolecular dehydration is carried out between the silanol groups, and the surface of the coating seems to form a net structure, so that a layer of compact protective film is formed on the surface of a metal substrate, the entry of corrosive medium in the environment is prevented, the corrosion is delayed, and the corrosion resistance of the coating is greatly improved.
Detailed Description
The present invention will be described in further detail with reference to the following examples, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent, and the description thereof is merely illustrative of the present invention and not intended to be limiting. In addition, for numerical ranges in this disclosure, it is understood that each intermediate value between the upper and lower limits of the ranges is also specifically disclosed. Every smaller range between any stated value or stated range, and any other stated value or intermediate value within the stated range, is also encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the invention described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from consideration of the specification of the present invention. The specification and examples of the present invention are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
The "parts" indicated in the examples below are parts by weight.
Example 1
The anti-thread seizure coating comprises the following components in parts by weight: 20 parts of phenolic epoxy resin, 0.5 part of advection agent, 5 parts of curing agent, 15 parts of filler, 32 parts of ethanol aqueous solution, 3 parts of ethylene-terminated fluorine-containing polysiloxane modified graphene oxide and 0.5 part of defoaming agent;
wherein the volume ratio of ethanol to water in the ethanol water solution is 1:1;
wherein the advection agent is pure polyacrylate;
wherein the curing agent is polyamide epoxy curing agent;
wherein the filler is talcum powder, sericite, kaolin and silica micropowder, and the weight ratio of the talcum powder to the sericite to the silica micropowder is 1:2:1:2;
wherein, the component of the defoaming agent is a mixture of polydimethylsiloxane and polyoxypropylene glycerol ether.
Preparation of ethylene-terminated fluorine-containing polysiloxane: 80g of octamethyl cyclotetrasiloxane and 100g of 1, 3-divinyl-1, 3-tetramethyldisiloxane are added into a reaction vessel, stirred for 20min, heated to 65-75 ℃ in an oil bath after uniform mixing, and 10g of catalyst of 75% concentrated sulfuric acid is added dropwise in total; after the completion of the dropwise addition, 50g of methyltrifluoropropyl cyclotrisiloxane was added; maintaining the temperature of the oil bath at 65-75 ℃ and reacting for 2h under magnetic stirring; after the reaction is finished, the reaction vessel is put out of an oil bath, naturally cooled to room temperature, and finally anhydrous sodium carbonate is added to neutralize concentrated sulfuric acid; filtering the precipitate obtained by the reaction by using filter paper, and flushing the precipitate with plasma water for several times to obtain the product ethylene-terminated fluorine-containing polysiloxane.
The above formula is illustrative of the preparation and synthesis of ethylene-terminated fluorine-containing polysiloxanes.
Preparation of ethylene-terminated fluorine-containing polysiloxane modified graphene oxide: weighing 1g of graphene oxide, dissolving in 50g of absolute ethyl alcohol, adding 2g of sodium hydroxide, and carrying out ultrasonic treatment for 1h to enable the graphene oxide to be fully dispersed; and then transferred to a reaction vessel; heating the oil bath of the reaction vessel to 65-75 ℃, and continuously magnetically stirring at constant temperature for reaction for 30min; then adding 10g of ethylene-terminated fluorine-containing polysiloxane into the system, and dripping 5g of deionized water in total within 5 min; after the dripping is completed; maintaining the temperature of the oil bath at 65-75 ℃, continuously stirring and reacting for 24 hours, and filtering the reacted solution by using a polytetrafluoroethylene film with the thickness of 0.22 mu m after the reaction is finished; and repeatedly washing the precipitate obtained by filtering the polytetrafluoroethylene membrane with a large amount of distilled water after the filtration is completed until the washed distilled water shows neutrality, and finally drying the precipitate in vacuum to obtain the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide.
The preparation method of the anti-thread-seizure coating comprises the following steps: firstly, placing 3 parts by weight of ethylene-terminated fluorine-containing polysiloxane modified graphene oxide in 32 parts by weight of ethanol aqueous solution, and fully stirring and uniformly mixing; fluorine and hydroxyl are both isoelectric and have similar polarity, so that the ethylene-terminated fluorine-containing polysiloxane modified graphite oxide can be effectively dissolved in ethanol solution, and then 20 parts by weight of phenolic epoxy resin, 0.5 part by weight of advection agent, 15 parts by weight of filler and 0.5 part of defoamer are added into the solution and stirred uniformly; and finally adding 5 parts by weight of curing agent into the mixture, and stirring the mixture uniformly again to finally prepare the anti-thread seizure coating.
Example 2
The anti-thread seizure coating comprises the following components in parts by weight: 24 parts of phenolic epoxy resin, 1 part of advection agent, 8 parts of curing agent, 18 parts of filler, 30 parts of ethanol water solution, 2 parts of ethylene-terminated fluorine-containing polysiloxane modified graphene oxide and 1 part of defoaming agent;
wherein the volume ratio of ethanol to water in the ethanol water solution is 1:1;
the model of the advection agent is BYK371;
wherein the curing agent is alicyclic amine epoxy curing agent;
wherein the filler is talcum powder, sericite, kaolin and silica micropowder, and the weight ratio of the talcum powder to the sericite to the silica micropowder is 1:2:1:2;
wherein the component of the defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether;
in the example 2, the preparation methods of the ethylene-terminated fluorine-containing polysiloxane, the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide and the anti-thread seizure coating are the same as those in the example 1.
Example 3
The anti-thread seizure coating comprises the following components in parts by weight: 30 parts of phenolic epoxy resin, 1 part of advection agent, 10 parts of curing agent, 22 parts of filler, 36 parts of ethanol water solution, 3 parts of ethylene-terminated fluorine-containing polysiloxane modified graphene oxide and 1.2 parts of defoaming agent;
wherein the volume ratio of ethanol to water in the ethanol water solution is 1:1;
the model of the advection agent is BYK371;
wherein the curing agent is alicyclic amine epoxy curing agent;
wherein the filler is talcum powder, sericite, kaolin and silica micropowder, and the weight ratio of the talcum powder to the sericite to the silica micropowder is 1:2:1:2;
wherein the component of the defoaming agent is a mixture of polyoxyethylene polyoxypropylene amine ether and polyoxypropylene glycerol ether;
in the example 3, the preparation methods of the ethylene-terminated fluorine-containing polysiloxane, the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide and the anti-thread seizure coating are the same as those in the example 1.
Example 4
The anti-thread seizure coating comprises the following components in parts by weight: 35 parts of phenolic epoxy resin, 1.5 parts of a advection agent, 12 parts of a curing agent, 20 parts of a filler, 40 parts of an ethanol aqueous solution, 4 parts of ethylene-terminated fluorine-containing polysiloxane modified graphene oxide and 1.5 parts of a defoaming agent;
wherein the volume ratio of ethanol to water in the ethanol water solution is 1:1;
the model of the advection agent is BYK371;
wherein the curing agent is polyamide epoxy curing agent;
wherein the filler is talcum powder, sericite, kaolin and silica micropowder, and the weight ratio of the talcum powder to the sericite to the silica micropowder is 1:2:1:2;
wherein the component of the defoaming agent is polydimethylsiloxane;
in the example 4, the preparation methods of the ethylene-terminated fluorine-containing polysiloxane, the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide and the anti-thread seizure coating were the same as those in the example 1.
Example 5
The anti-thread seizure coating comprises the following components in parts by weight: 50 parts of phenolic epoxy resin, 1.5 parts of a advection agent, 15 parts of a curing agent, 28 parts of a filler, 50 parts of an ethanol aqueous solution, 5 parts of ethylene-terminated fluorine-containing polysiloxane modified graphene oxide and 2 parts of a defoaming agent;
wherein the volume ratio of ethanol to water in the ethanol water solution is 1:1;
the model of the advection agent is BYK371;
wherein the curing agent is polyamide epoxy curing agent;
wherein the filler is talcum powder, sericite, kaolin and silica micropowder, and the weight ratio of the talcum powder to the sericite to the silica micropowder is 1:2:1:2;
wherein the component of the defoaming agent is polyacrylamide;
in the example 4, the preparation methods of the ethylene-terminated fluorine-containing polysiloxane, the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide and the anti-thread seizure coating were the same as those in the example 1.
Example 6
Based on example 2, 2 parts by weight of the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide component was replaced with 2 parts by weight of fluorinated graphene oxide; other components are unchanged;
the anti-thread seizure coating comprises the following components in parts by weight: 24 parts of phenolic epoxy resin, 1 part of advection agent, 8 parts of curing agent, 18 parts of filler, 30 parts of ethanol water solution, 2 parts of fluorinated graphene oxide and 1 part of defoaming agent;
the preparation method comprises the following steps: firstly, placing 2 parts by weight of fluorinated graphene oxide in 30 parts by weight of ethanol aqueous solution, and fully stirring and uniformly mixing; then adding 24 parts by weight of phenolic epoxy resin, 1 part by weight of advection agent, 18 parts by weight of filler and 1 part of defoaming agent into the mixture, and uniformly stirring the mixture; and finally, adding 8 parts by weight of curing agent into the mixture, and stirring the mixture uniformly again to obtain the coating for preventing thread seizure.
Example 7
Based on example 3,3 parts by weight of the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide component was replaced with 3 parts by weight of fluorinated graphene oxide; other components are unchanged;
the anti-thread-biting coating comprises, by weight, 30 parts of phenolic epoxy resin, 1 part of a advection agent, 10 parts of a curing agent, 22 parts of a filler, 36 parts of an ethanol aqueous solution, 3 parts of fluorinated graphene oxide and 1.2 parts of a defoaming agent;
the preparation method comprises the following steps: firstly, placing 3 parts by weight of fluorinated graphene oxide in 36 parts by weight of ethanol aqueous solution, and fully stirring and uniformly mixing; then adding 30 parts by weight of phenolic epoxy resin, 1 part by weight of advection agent, 22 parts by weight of filler and 1.2 parts of defoaming agent into the mixture, and uniformly stirring the mixture; finally, 10 parts by weight of curing agent is added into the mixture, and the mixture is stirred uniformly again to obtain the coating for preventing thread seizure.
Example 8
Based on example 4, 4 parts by weight of the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide component was replaced with 4 parts by weight of fluorinated graphene oxide; other components are unchanged;
the anti-thread-biting coating comprises, by weight, 35 parts of phenolic epoxy resin, 1.5 parts of advection agent, 12 parts of curing agent, 20 parts of filler, 40 parts of ethanol aqueous solution, 4 parts of fluorinated graphene oxide and 1.5 parts of defoaming agent;
the preparation method comprises the following steps: firstly, placing 4 parts by weight of fluorinated graphene oxide in 40 parts by weight of ethanol aqueous solution, and fully stirring and uniformly mixing; then adding 35 parts by weight of phenolic epoxy resin, 1.5 parts by weight of advection agent, 20 parts by weight of filler and 1.5 parts of defoaming agent into the mixture, and uniformly stirring the mixture; and finally, adding 12 parts by weight of curing agent into the mixture, and stirring the mixture uniformly again to obtain the coating for preventing the thread from being bitten.
Example 9
Based on example 3,3 parts by weight of the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide component was replaced with 3 parts by weight of graphene oxide; and adding 15 parts by weight of ethylene-terminated fluorine-containing polysiloxane; other components are unchanged;
the anti-thread-biting coating comprises, by weight, 30 parts of phenolic epoxy resin, 1 part of a advection agent, 10 parts of a curing agent, 22 parts of a filler, 36 parts of an ethanol aqueous solution, 3 parts of graphene oxide, 1.2 parts of a defoaming agent and 15 parts of ethylene-terminated fluorine-containing polysiloxane;
the preparation method comprises the following steps: firstly, placing 3 parts by weight of graphene oxide in 36 parts by weight of ethanol water solution, and fully stirring and uniformly mixing; then adding 30 parts by weight of phenolic epoxy resin, 1 part by weight of advection agent, 15 parts by weight of filler, 1.2 parts by weight of defoamer and 15 parts by weight of ethylene-terminated fluorine-containing polysiloxane into the mixture, and uniformly stirring the mixture; finally, 10 parts by weight of curing agent is added into the mixture, and the mixture is stirred uniformly again to obtain the coating for preventing thread seizure.
Example 10
Based on example 3,3 parts by weight of the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide component was replaced with 3 parts by weight of graphene oxide; and 15 parts by weight of methyltrifluoropropyl cyclotrisiloxane are added; other components are unchanged;
the anti-thread-biting coating comprises, by weight, 30 parts of phenolic epoxy resin, 1 part of a advection agent, 10 parts of a curing agent, 22 parts of a filler, 36 parts of an ethanol aqueous solution, 3 parts of graphene oxide, 1.2 parts of a defoaming agent and 15 parts of methyl trifluoropropyl cyclotrisiloxane;
the preparation method comprises the following steps: firstly, placing 3 parts by weight of graphene oxide in 36 parts by weight of ethanol water solution, and fully stirring and uniformly mixing; then adding 30 parts by weight of phenolic epoxy resin, 1 part by weight of advection agent, 15 parts by weight of filler, 1.2 parts by weight of defoamer and 15 parts by weight of methyl trifluoro propyl cyclotrisiloxane into the mixture, and uniformly stirring the mixture; finally, 10 parts by weight of curing agent is added into the mixture, and the mixture is stirred uniformly again to obtain the coating for preventing thread seizure.
Test examples
Coating the coating prepared in examples 1-10 on a thread;
step S1 is first performed to clean the threaded base material: placing the threads to be coated in acetone, performing ultrasonic treatment for 30min, then wiping off scraps and dust on the surfaces of the threads by using absorbent cotton and absolute ethyl alcohol, finally flushing with plasma water, and drying in a drying oven for standby.
And then carrying out step S2, and coating the prepared coating: uniformly coating the prepared solution on the surface of a threaded substrate through a coater, wherein the thickness of the coating coated in the test example is uniformly 30 mu m when the method is implemented;
and finally, executing the step S3, curing and drying: adopting hot air convection curing, wherein the curing temperature is set to be 100-140 ℃; the curing time was 2h.
And (3) testing the corrosion resistance Tafel curve of the coating: the coating coated with 30 μm was placed in 3.5% NaCl solution and the polarization parameters were determined; the scan voltage initial value was set to-1.000V, the sweep voltage end value was set to 0V, and the test rate and the waiting time were set to 0.01V/s and 2s, respectively. Fitting the Tafel polarization curve obtained by the test, and calculating the corrosion rate CR and the corrosion prevention efficiency P of the coating by adopting the following formula ET ：
Wherein k is a fixed value (3268.5 mol/A), n is the number of transferred electrons, ρ m Is the relative density (g/cm) of the metal substrate 3 ）、M m Is the relative molecular mass (g/mol), I of the metal substrate corr（c） The corrosion current densities obtained by testing are obtained by coating with different coatings;
the upper part is the corrosion prevention efficiency P ET Wherein I is corr（c） Represents the corrosion current density when coated, I corr Represents the corrosion current density without coating;
in this test example, the corrosion resistance of the coating was determined by the corrosion potential (E corr ) Corrosion current density (I) corr（c） ) Efficiency of corrosion protection (P) ET ) And the corrosion rate CR and other indexes of the coating are characterized, and the corrosion potential of the coating is higher, the corrosion current density is lower, and the corrosion resistance of the coating is better; the test results are shown in Table 1 below;
table 1 table for testing corrosion resistance of examples 1 to 10
Analysis of coating corrosion resistance test results: the preservative efficiency (P) of examples 1 to 5 ET ) The higher the corrosion potential of the coating is, the lower the corrosion current density is, the better the corrosion resistance of the coating is, and the analysis of the test results shows that in the examples 1-5, the mixture ratio of the example 3 has the highest corrosion potential and the lowest corrosion current density, and the optimal corrosion resistance is achieved.
Examples 6 to 8 differ from examples 1 to 5 in that the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide component was replaced with fluorinated graphene oxide, and the corrosion resistance was degraded in the form of cliff, the corrosion resistance efficiency (P ET ) Drop from 99% to 60% head; the possible reasons are: fluorinated graphene oxide has poor dispersibility and serious agglomeration in a solvent, is easy to agglomerate and cannot be uniformly dispersed in the solvent, so that the fluorinated graphene cannot fully cover the threaded surface, and the threaded surface which is not covered by the fluorinated graphene is severely corroded, thereby leading to corrosion prevention efficiency (P ET ) Is greatly reduced.
Examples 9 to 10 are different from examples 1 to 5 in that the components of the modified graphene oxide are directly used as raw materials to be subjected to physical stirring to prepare a coating; the unmodified graphene oxide can only play a certain role in blocking the corrosive medium by virtue of the physical characteristics of the graphene oxide, and the physical stirring cannot solve the problem that serious agglomeration exists in practical application due to the nano effect of the graphene oxide and the incompatibility with the polymer, so that the corrosion resistance of the embodiments 9-10 is worst.
And (3) testing the wear resistance of the coating: the abrasion resistance test is carried out by adopting a rotary rubber grinding wheel method according to GB/T1768-2006, the anti-thread seizure coating and the preparation method thereof are the same as those for carrying out the corrosion resistance test, and the thickness of the coating is unified to be 30 mu m; after the preparation is finished, the mixture is placed for more than 10 days at normal temperature for standby.
During wear resistance test, firstly weighing the initial weight of the threaded part to be 0.1mg, then mounting a sample on a wear instrument, connecting a dust collection device in parallel, setting load and rotating speed, and selecting the rotating speed of 400-1000 revolutions in the test example; after the specified rotating speed is reached, the machine is automatically stopped, and the screw piece is taken down for weighing again; the quality difference of the two times is the weight loss of the sample under the load and the rotating speed, and the smaller the weight loss is, the better the wear resistance is; the abrasion resistance test results are shown in Table 2;
table 2 examples 1-10 wear resistance test tables
Analysis of coating abrasion resistance test results: as can be seen from Table 2, examples 9-10 had the most wear loss, the worst wear resistance, and graphene oxide was selected as the material; compared with examples 9-10, the abrasion resistance of the examples 6-8 of the fluorinated graphene is obviously improved; under the condition of 400 revolutions, the optimal wear loss is reduced by more than 200 percent; in the examples 1-5, ethylene-terminated fluorine-containing polysiloxane modified graphene oxide is selected, so that the optimal wear weight loss is obtained; has the best wear resistance.
Screw coating tightening and loosening test: the screw friction pair coated with the anti-thread seizure coating is subjected to a tightening and loosening experiment by using a torque wrench, the preparation of the coating is the same as that of a corrosion resistance test, and the thickness of the coating is unified to be 30 mu m; after the preparation is finished, the test is carried out by standing for more than 10 days at normal temperature.
The nominal diameter of the thread of this experimental example is 20mm, and the applied torque is 500Nm; after the specified moment is reached, maintaining for 30 seconds, completely loosening the fit between the thread friction pairs, and screwing again, wherein the total screwing time is 100 times;
table 3 screw torque test table of examples 1-10
Analysis of screw coating tightening and loosening test results: as can be seen from Table 3, the coatings prepared in examples 1-5 have excellent mechanical properties after more than 100 tightening and loosening tests, and the coating is not separated and the threads are exposed; the single fluorinated graphene applied in examples 6-8 has limited improvement of wear resistance and corrosion resistance of the polymer coating as the nano reinforcing filler, so that the test result after the tightening and loosening test is obviously better than that of examples 9-10, but is obviously weaker than that of examples 1-5; the performance limitation of the fluorinated graphene as the nano reinforcing filler in the thread coating is highlighted.
Comprehensive analysis: the single fluorinated graphene serving as the nano reinforcing filler has limited improvement on the wear-resistant and corrosion-resistant properties of the polymer coating; the graphene oxide cannot be applied to the anti-thread seizure coating, but unmodified graphene oxide has extremely poor dispersibility in an organic solvent, is easy to agglomerate and has poor performances; according to the invention, the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide is introduced to improve the property of the anti-thread-seizure coating, and part of hydrophilic groups such as carboxyl on the surface of the modified graphene oxide are replaced by hydrophobic alkyl, so that the dispersion stability of the modified graphene oxide in an organic solvent (phenolic resin) is obviously improved; the dispersibility, the adhesive force and the compatibility of the epoxy resin in the phenolic resin coating are improved, and the mechanical property of the phenolic resin epoxy coating are improved; the modified graphene oxide has silane groups, the silane groups form silanol through hydrolysis, intermolecular dehydration is performed between the silanol groups, and the surface of the coating seems to form a net structure, so that a layer of compact protective film is formed on the surface of a metal substrate, the entry of corrosive medium in the environment is prevented, the corrosion is delayed, and the corrosion resistance of the coating is greatly improved; a large amount of fluorocarbon radicals with low surface energy are introduced into the coating, so that the surface of the coating has low surface energy, and the interlayer interaction between fluorine atoms is low, so that the friction coefficient of the coating is reduced, and good tribological performance is provided for the coating.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The anti-thread-biting coating is characterized by comprising the following components in parts by weight: 20-50 parts of phenolic epoxy resin, 0.5-1.5 parts of advection agent, 5-15 parts of curing agent, 15-30 parts of filler, 30-50 parts of ethanol aqueous solution, 2-5 parts of ethylene end-capped fluorine-containing polysiloxane modified graphene oxide and 0.5-2 parts of defoaming agent.
2. The anti-thread-seizure coating of claim 1, wherein the anti-thread-seizure coating comprises, in parts by weight: 30 parts of phenolic epoxy resin, 1 part of advection agent, 10 parts of curing agent, 22 parts of filler, 36 parts of ethanol water solution, 3 parts of ethylene-terminated fluorine-containing polysiloxane modified graphene oxide and 1.2 parts of defoaming agent.
3. The anti-galling coating according to claim 1, wherein the filler is a mixture of talc, sericite, kaolin, and silica micropowder, talc: sericite: kaolin: the weight ratio of the silicon micro powder is 1:2:1:2.
4. the anti-galling coating according to claim 1, wherein the defoamer is at least one of polydimethylsiloxane, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene alcohol amine ether, polyoxypropylene glycerol ether, and polyacrylamide.
5. The anti-galling coating according to claim 1, wherein the volume ratio of ethanol to water in the aqueous ethanol solution is 1:1.
6. The anti-thread-seizure coating of claim 1, wherein the advection agent is pure polyacrylate or BYK371; the curing agent is at least one of polyamide epoxy curing agents and alicyclic amine epoxy curing agents.
7. The anti-thread-seizure coating of any one of claims 1-6, wherein the preparation method of the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide is as follows: weighing graphene oxide, absolute ethyl alcohol and sodium hydroxide, and placing the graphene oxide, the absolute ethyl alcohol and the sodium hydroxide in a reaction container, and uniformly dispersing by ultrasonic waves; heating the oil bath to 65-75 ℃, and continuously stirring and reacting for 30min at constant temperature; adding ethylene end-capped fluorine-containing polysiloxane into the system, and dripping deionized water; after the dripping is completed; maintaining the temperature of the oil bath at 65-75 ℃ and continuously stirring for reaction for 24 hours; after the reaction, the solution after the reaction was filtered by a 0.22 μm polytetrafluoroethylene film; and repeatedly washing the precipitate obtained by filtering the polytetrafluoroethylene membrane with a large amount of distilled water after the filtration is completed until the washed distilled water shows neutrality, and finally drying the precipitate in vacuum to obtain the ethylene-terminated fluorine-containing polysiloxane modified graphene oxide.
8. A method for preparing the anti-thread-seizure coating according to any one of claims 1 to 6, characterized in that the method for preparing the anti-thread-seizure coating comprises the steps of: firstly, placing ethylene-terminated fluorine-containing polysiloxane modified graphene oxide in an ethanol aqueous solution, and fully stirring and uniformly mixing; adding phenolic epoxy resin, a advection agent, a filler and a defoaming agent into the mixture, and uniformly stirring the mixture; and finally adding a curing agent into the mixture, and stirring the mixture uniformly again to finally prepare the coating for preventing the thread from being bitten.
9. Use of an anti-thread-seizure coating according to any one of claims 1-6, characterized in that it is in particular: spraying or brushing the anti-thread seizure coating onto the surface of the thread substrate, wherein the coating thickness is 20-40 mu m; and curing and drying.
10. The application of the anti-thread seizure coating according to claim 9, characterized in that in the solidifying and drying process, the solidifying mode is hot air convection solidifying, and the solidifying temperature is 100-140 ℃; the curing time was 2h.
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