CN114479572A - Wear-resistant coating and preparation method thereof - Google Patents
Wear-resistant coating and preparation method thereof Download PDFInfo
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- CN114479572A CN114479572A CN202111653904.0A CN202111653904A CN114479572A CN 114479572 A CN114479572 A CN 114479572A CN 202111653904 A CN202111653904 A CN 202111653904A CN 114479572 A CN114479572 A CN 114479572A
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- 238000000576 coating method Methods 0.000 title claims abstract description 43
- 239000011248 coating agent Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 67
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 62
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000004593 Epoxy Substances 0.000 claims abstract description 27
- 239000000839 emulsion Substances 0.000 claims abstract description 19
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 10
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims abstract description 10
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 7
- 229920006243 acrylic copolymer Polymers 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 239000003822 epoxy resin Substances 0.000 claims description 34
- 229920000647 polyepoxide Polymers 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 26
- 229920002125 Sokalan® Polymers 0.000 claims description 19
- 239000004584 polyacrylic acid Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 18
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- 238000005299 abrasion Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 239000003999 initiator Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000000178 monomer Substances 0.000 claims description 11
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 10
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 9
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 8
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 7
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 7
- 239000003995 emulsifying agent Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 5
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 claims description 5
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 3
- 229930195729 fatty acid Natural products 0.000 claims description 3
- 239000000194 fatty acid Substances 0.000 claims description 3
- -1 fatty acid salts Chemical class 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 229920002126 Acrylic acid copolymer Polymers 0.000 claims 2
- 239000000463 material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 3
- 238000011049 filling Methods 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 230000007935 neutral effect Effects 0.000 description 6
- 239000003973 paint Substances 0.000 description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 5
- 239000004342 Benzoyl peroxide Substances 0.000 description 4
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 4
- 235000019400 benzoyl peroxide Nutrition 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 230000003449 preventive effect Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000002562 thickening agent Substances 0.000 description 4
- 239000012752 auxiliary agent Substances 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000002508 compound effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000006115 industrial coating Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
-
- 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
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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 wear-resistant coating and a preparation method thereof, wherein the wear-resistant coating comprises the following raw materials in parts by weight: 25-40% of graphene oxide modified epoxy acrylic emulsion, 3-5% of carbon nitride, 3-5% of silicon nitride, 6-10% of nano titanium dioxide and 10-25% of anionic surfactant; the weight ratio of the carbon nitride to the silicon nitride to the nano titanium dioxide is 1:1: 2. By introducing graphene oxide into the molecular chain of the epoxy acrylic copolymer, the flexibility, impact resistance and wear resistance of the coating are improved, so that the prepared coating is not easy to crack; then, by adding an anionic surfactant, the carbon nitride, the silicon nitride and the nano titanium dioxide are arranged between graphene oxide laminated structures and filled in gaps of graphene oxide, so that the effects of reinforcing, filling and increasing the interface action force are achieved, and the corrosion resistance of the coating is improved.
Description
Technical Field
The invention belongs to the field of industrial coatings, and particularly relates to a wear-resistant coating and a preparation method thereof.
Background
Epoxy resin has the advantages of excellent chemical resistance, solvent resistance, heat resistance and the like. However, the formed coating film is easy to crack and rapidly spread under the action of stress, and finally the coating is cracked and loses the protection effect. And the epoxy resin is a thermosetting resin, and is in a three-dimensional network structure after being cured, so that a plurality of gaps exist, and the corrosion resistance and the adhesive force of the epoxy resin are contrasted. Therefore, the epoxy resin must be modified to improve the corrosion resistance, adhesion and crack resistance of the epoxy resin.
Graphene oxide is a novel carbon material with excellent performance, has a high specific surface area and rich functional groups on the surface, including hydroxyl, epoxy functional groups, carbonyl, carboxyl and the like. The graphene oxide still keeps the layered structure of graphite, and the layers of the graphene oxide have good lubricating effect, so that the internal stress of the coating can be effectively reduced, the fracture energy is consumed, and the flexibility, the impact resistance and the wear resistance of the coating are further improved. However, graphene oxide is poor in compatibility with epoxy resin, gaps exist between layered structures, corrosive substances easily permeate into a coating made of graphene oxide and epoxy resin, and the coating is prone to falling off.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a wear-resistant coating; by introducing graphene oxide into the molecular chain of the epoxy acrylic copolymer, the flexibility, impact resistance and wear resistance of the coating are improved, so that the prepared coating is not easy to crack; then, by adding an anionic surfactant, the carbon nitride, the silicon nitride and the nano titanium dioxide are arranged between graphene oxide laminated structures and filled in gaps of graphene oxide, so that the effects of reinforcing, filling and increasing the interface action force are achieved, and the corrosion resistance of the coating is improved.
The invention aims to provide a wear-resistant coating which comprises the following raw materials in parts by weight:
the weight ratio of the carbon nitride to the silicon nitride to the nano titanium dioxide is 1:1: 2.
According to the scheme, the graphene oxide is grafted on a molecular chain of the epoxy acrylic copolymer through chemical bonding, so that the problem that the compatibility of the graphene oxide and epoxy resin is poor is solved. And the surface of the graphene oxide is provided with functional groups such as hydroxyl groups, and the graphene oxide and polar groups such as carboxyl groups and epoxy groups in the polymer can have interaction forces such as hydrogen bond force, van der waals force and the like, so that the flexibility, impact resistance and wear resistance of the epoxy resin are enhanced.
The surface of the nano titanium dioxide adopted by the scheme contains a large amount of hydroxyl, the hydroxyl can be subjected to copolycondensation with carboxyl on an epoxy acrylic copolymer molecular chain, the hydroxyl on the surface of the nano titanium dioxide and N on carbon nitride and silicon nitride molecules have a hydrogen bond effect, and the carbon nitride, the silicon nitride and the nano titanium dioxide form a good compound effect.
The invention also aims to provide a preparation method of the graphene oxide modified epoxy acrylic emulsion, which comprises the following steps:
s1, mixing an initiator and a solvent to obtain a diluted initiator;
s2, dropwise adding a diluted initiator into an acrylic monomer, and heating for reaction to obtain polyacrylic acid;
s3, mixing the polyacrylic acid prepared in the step S2 with epoxy resin, adding ethylenediamine and graphene oxide, adjusting the pH value, and heating for reaction to obtain graphene oxide modified epoxy resin;
and S4, adding an emulsifier and water into the graphene oxide modified epoxy resin prepared in the step S3, and heating for reaction to obtain the graphene oxide modified epoxy acrylic emulsion.
Preferably, in step S1, the first initiator is selected from one or more of azobisisobutyronitrile, azobisisoheptonitrile, and lauroyl peroxide. The first initiator selected by the scheme has low decomposition temperature and high initiation activity, and the polyacrylic acid with high molecular weight is prepared, so that the prepared coating has better mechanical property.
In the scheme, in step S1, the initiator is diluted first and then slowly added dropwise to the monomer. On one hand, the reaction system is more stable, the reaction is prevented from being too fast, and the reaction temperature is difficult to control; on the other hand, the initiator is slowly dripped into the monomer, so that the monomer in the reaction system is far more than the initiator in the system, and the molecular weight of the polymer is favorably improved.
Preferably, in step S1, the first solvent is selected from one or more of ethyl acetate, butanone and acetone. The first solvent selected for use in this embodiment is selected based on the reaction temperature.
Preferably, in step S2, the weight ratio of acrylic acid to the initiator is 1: 0.002-0.005.
Preferably, in step S2, the heating temperature is 55-75 ℃.
Preferably, in step S3, the weight ratio of the polyacrylic acid, the epoxy resin, the ethylene diamine and the graphene oxide prepared in step S2 is 0.2-0.5:1: 0.02-0.05: 0.1 to 0.3.
Preferably, in step S3, the pH is adjusted with ammonia water. According to the scheme, weak base is adopted to adjust the alkalinity of the system, so that the alkalinity of the system can be controlled.
Preferably, in step S4, the emulsifier is selected from one or two of sodium dodecyl sulfate and sodium dodecyl benzene sulfonate.
Preferably, in step S4, the weight ratio of the graphene oxide modified epoxy resin prepared in step S3 to the emulsifier and the water is 1:0.3-0.5: 0.5-1.
Preferably, the anionic surfactant is selected from fatty acid salts with carbon chain lengths of C14-C18. The fatty acid salt selected by the scheme has long carbon chain length, and the carbon chain is inserted into the resin gap, so that the gap filling effect can be realized.
Further, the wear-resistant paint also comprises 0.1-0.3% of dispersing agent, 3-5% of film forming auxiliary agent, 0.5-2.0% of flatting agent, 0.5-2.0% of thickening agent, 0.5-1.5% of mildew preventive and the balance of water.
Further, the dispersing agent, the film forming assistant, the flatting agent, the thickening agent and the mildew preventive are all sold in the market.
The invention also aims to provide a preparation method of the wear-resistant coating, which is characterized by comprising the following steps:
s1, mixing 25% -40% of graphene oxide modified epoxy acrylic emulsion, 3% -5% of carbon nitride, 3% -5% of silicon nitride, 3% -5% of nano titanium dioxide and 10% -25% of anionic surfactant, and stirring at room temperature to obtain a mixture;
s2, adding 0.1-0.3% of dispersing agent, 3-5% of film forming auxiliary agent, 0.5-2.0% of flatting agent, 0.5-2.0% of thickening agent, 0.5-1.5% of mildew preventive and the balance of water into the mixture, and stirring at room temperature to obtain the wear-resistant coating.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: and (3) preparing the graphene oxide modified epoxy acrylic emulsion.
S1, mixing 0.02 part by weight of azobisisobutyronitrile with 5 parts by weight of ethyl acetate to obtain diluted azobisisobutyronitrile;
s2, dropwise adding diluted azodiisobutyronitrile into 10 parts by weight of acrylic monomer and 20 parts by weight of ethyl acetate, and heating at 65 ℃ for reaction for 1 hour to obtain polyacrylic acid;
s3, mixing 2 parts by weight of polyacrylic acid prepared in the step S2 with 10 parts by weight of epoxy resin, adding 0.2 part by weight of ethylenediamine and 1 part by weight of graphene oxide, adjusting the pH value to be neutral by ammonia water, and heating and reacting at 50 ℃ for 2 hours to obtain graphene oxide modified epoxy resin;
and S4, adding 3 parts by weight of sodium dodecyl sulfate and 5 parts by weight of water into 10 parts by weight of the graphene oxide modified epoxy resin prepared in the step S3, and heating and reacting at 40 ℃ for 30 minutes to obtain the graphene oxide modified epoxy acrylic emulsion.
Example 2: and (3) preparing the graphene oxide modified epoxy acrylic emulsion.
Step S1, mixing 0.04 parts by weight of azobisisoheptonitrile with 5 parts by weight of acetone to obtain diluted azobisisoheptonitrile;
s2, dropwise adding diluted azodiisoheptanonitrile into 10 parts by weight of acrylic monomer and 20 parts by weight of acetone, and heating at 55 ℃ for reacting for 1 hour to obtain polyacrylic acid;
s3, mixing 4 parts by weight of polyacrylic acid prepared in the step S2 with 10 parts by weight of epoxy resin, adding 0.4 part by weight of ethylenediamine and 2 parts by weight of graphene oxide, adjusting the pH value to be neutral by ammonia water, and heating and reacting at 50 ℃ for 2 hours to obtain graphene oxide modified epoxy resin;
and S4, adding 4 parts by weight of sodium dodecyl benzene sulfonate and 8 parts by weight of water into 10 parts by weight of the graphene oxide modified epoxy resin prepared in the step S3, and heating and reacting at 40 ℃ for 30 minutes to obtain the graphene oxide modified epoxy acrylic emulsion.
Example 3: and (3) preparing the graphene oxide modified epoxy acrylic emulsion.
Step S1, mixing 0.05 part by weight of lauroyl peroxide and 5 parts by weight of butanone to obtain diluted lauroyl peroxide;
s2, dropwise adding diluted lauroyl peroxide into 10 parts by weight of acrylic acid monomer and 20 parts by weight of butanone, and heating to react for 1 hour at 75 ℃ to obtain polyacrylic acid;
s3, mixing 5 parts by weight of polyacrylic acid prepared in the step S2 with 10 parts by weight of epoxy resin, adding 0.5 part by weight of ethylenediamine and 3 parts by weight of graphene oxide, adjusting the pH value to be neutral by ammonia water, and heating and reacting at 50 ℃ for 2 hours to obtain graphene oxide modified epoxy resin;
and S4, adding 5 parts by weight of sodium dodecyl benzene sulfonate and 10 parts by weight of water into 10 parts by weight of the graphene oxide modified epoxy resin prepared in the step S3, and heating and reacting at 40 ℃ for 30 minutes to obtain the graphene oxide modified epoxy acrylic emulsion.
Comparative example 1: and (3) preparing the graphene oxide modified epoxy acrylic emulsion.
S1, mixing 0.04 parts by weight of azodiisoheptanonitrile, 10 parts by weight of acrylic acid monomer and 25 parts by weight of acetone, and heating at 55 ℃ for reaction for 1 hour to obtain polyacrylic acid;
s2, mixing 4 parts by weight of polyacrylic acid prepared in the step S1 with 10 parts by weight of epoxy resin, adding 0.4 part by weight of ethylenediamine and 2 parts by weight of graphene oxide, adjusting the pH value to be neutral by ammonia water, and heating and reacting at 50 ℃ for 2 hours to obtain graphene oxide modified epoxy resin;
and S3, adding 4 parts by weight of sodium dodecyl benzene sulfonate and 8 parts by weight of water into 10 parts by weight of the graphene oxide modified epoxy resin prepared in the step S2, and heating and reacting at 40 ℃ for 30 minutes to obtain the graphene oxide modified epoxy acrylic emulsion.
Comparative example 2: and (3) preparing the graphene oxide modified epoxy acrylic emulsion.
S1, mixing 0.04 parts by weight of benzoyl peroxide, 10 parts by weight of acrylic acid monomer and 25 parts by weight of toluene, and heating at 110 ℃ for reaction for 1 hour to obtain polyacrylic acid;
s2, mixing 4 parts by weight of polyacrylic acid prepared in the step S1 with 10 parts by weight of epoxy resin, adding 0.4 part by weight of ethylenediamine and 2 parts by weight of graphene oxide, adjusting the pH value to be neutral by ammonia water, and heating and reacting at 50 ℃ for 2 hours to obtain graphene oxide modified epoxy resin;
and S3, adding 4 parts by weight of sodium dodecyl benzene sulfonate and 8 parts by weight of water into 10 parts by weight of the graphene oxide modified epoxy resin prepared in the step S2, and heating and reacting at 40 ℃ for 30 minutes to obtain the graphene oxide modified epoxy acrylic emulsion.
Comparative example 3: and (3) preparing the graphene oxide modified epoxy acrylic emulsion.
S1, mixing 0.04 parts by weight of benzoyl peroxide and 5 parts by weight of toluene to obtain diluted benzoyl peroxide;
s2, dripping diluted benzoyl peroxide into 10 parts by weight of acrylic monomer and 20 parts by weight of acetone, and heating to react for 1 hour at 110 ℃ to obtain polyacrylic acid;
s3, mixing 4 parts by weight of polyacrylic acid prepared in the step S2 with 10 parts by weight of epoxy resin, adding 0.4 part by weight of ethylenediamine and 2 parts by weight of graphene oxide, adjusting the pH value to be neutral by ammonia water, and heating and reacting at 50 ℃ for 2 hours to obtain graphene oxide modified epoxy resin;
and S4, adding 4 parts by weight of sodium dodecyl benzene sulfonate and 8 parts by weight of water into 10 parts by weight of the graphene oxide modified epoxy resin prepared in the step S3, and heating and reacting at 40 ℃ for 30 minutes to obtain the graphene oxide modified epoxy acrylic emulsion.
The embodiment provides a wear-resistant coating and a preparation method thereof.
(1) And (3) composition of wear-resistant paint.
TABLE 1 composition of parts by weight of abrasion resistant coatings of examples 4-6 and comparative examples 4-9.
(2) Examples 4-6 and comparative examples 4-9 preparation of abrasion resistant coatings.
S1, mixing the graphene oxide modified epoxy acrylic emulsion prepared in the examples 1-3 and the comparative examples 1-3, carbon nitride, silicon nitride, nano titanium dioxide and an anionic surfactant in parts by weight, and stirring at room temperature for 30 minutes to obtain a mixture;
s2, adding the dispersing agent, the film forming auxiliary agent, the flatting agent, the thickening agent, the mildew preventive and the water into the mixture, and stirring for 10 minutes at room temperature to obtain the wear-resistant coating.
And (5) testing the performance.
The coatings prepared in examples 4-6 and comparative examples 4-9 were formed into coating films according to the national Standard "GB/T1727 general paint film preparation method" for Performance testing, and the test results are shown in Table 2.
Flexibility test: GB/T1731-2020 paint film and putty film flexibility determination method.
And (3) impact resistance test: GB/T1732-1993 paint film impact resistance measurement method.
And (3) wear resistance test: RCA tape Abrasion Resistance Test was performed on the coating film Using RCA tape Abrasion Resistance tester, with reference to US Standard ASTM F2357-2010 Standard Test Method for Determining the Abrasion Resistance of the Coatings of Inks and Coatings on Membrane Switches Using the Norman Tool "RCA" Abrader ".
Table 2. results of physical property test of the coating film obtained from the abrasion resistant paint.
As can be seen from Table 2, the abrasion resistant coatings prepared in examples 4-6 have good corrosion resistance, abrasion resistance, flexibility and impact resistance.
Finally, it should be noted that the above-mentioned embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the modifications and equivalents of the specific embodiments of the present invention can be made by those skilled in the art after reading the present specification, but these modifications and variations do not depart from the scope of the claims of the present application.
Claims (10)
1. The wear-resistant coating is characterized by comprising the following raw materials in parts by weight:
the weight ratio of the carbon nitride to the silicon nitride to the nano titanium dioxide is 1:1: 2.
2. The wear-resistant coating of claim 1, wherein the graphene oxide modified epoxy acrylic emulsion is prepared by a method comprising the steps of:
s1, mixing an initiator and a solvent to obtain a diluted initiator;
s2, dropwise adding a diluted initiator into an acrylic monomer, and heating for reaction to obtain polyacrylic acid;
s3, mixing the polyacrylic acid prepared in the step S2 with epoxy resin, adding ethylenediamine and graphene oxide, adjusting the pH value, and carrying out heating reaction to obtain a graphene oxide modified epoxy acrylic acid copolymer;
and S4, adding an emulsifier and water into the graphene oxide modified epoxy acrylic copolymer prepared in the step S3, and heating for reaction to obtain the graphene oxide modified epoxy acrylic emulsion.
3. The abrasion-resistant coating of claim 2, wherein in step S1, the first initiator is selected from one or more of azobisisobutyronitrile, azobisisoheptonitrile, lauroyl peroxide.
4. The abrasion-resistant coating according to claim 2, wherein in step S1, the first solvent is selected from one or more of ethyl acetate, butanone and acetone.
5. The abrasion-resistant coating according to claim 2, wherein in step S2, the weight ratio of acrylic acid to the initiator is 1:0.002 to 0.005.
6. The abrasion resistant coating of claim 2, wherein the heating temperature is 55-75 ℃ in step S2.
7. The wear-resistant coating material of claim 2, wherein in step S3, the weight ratio of the polyacrylic acid, the epoxy resin, the ethylenediamine and the graphene oxide prepared in step S2 is 0.2-0.5:1: 0.02-0.05: 0.1 to 0.3.
8. The wear-resistant coating of claim 2, wherein in step S4, the weight ratio of the graphene oxide modified epoxy acrylic acid copolymer prepared in step S3 to the emulsifier and the water is 1:0.3-0.5: 0.1-0.2.
9. The abrasion-resistant coating of claim 2, wherein in step S4, the emulsifier is one or two selected from sodium dodecyl sulfate and sodium dodecyl benzene sulfonate.
10. The abrasion resistant coating of claim 1, wherein the anionic surfactant is selected from the group consisting of fatty acid salts having a carbon chain length of from C14 to C18.
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