CN116285589A - Building coating with corrosion resistance and preparation method thereof - Google Patents
Building coating with corrosion resistance and preparation method thereof Download PDFInfo
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- CN116285589A CN116285589A CN202310428087.1A CN202310428087A CN116285589A CN 116285589 A CN116285589 A CN 116285589A CN 202310428087 A CN202310428087 A CN 202310428087A CN 116285589 A CN116285589 A CN 116285589A
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- 238000000576 coating method Methods 0.000 title claims abstract description 65
- 239000011248 coating agent Substances 0.000 title claims abstract description 57
- 230000007797 corrosion Effects 0.000 title claims abstract description 42
- 238000005260 corrosion Methods 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 41
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 9
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 claims abstract description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 85
- 238000003756 stirring Methods 0.000 claims description 53
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 45
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 40
- 239000003822 epoxy resin Substances 0.000 claims description 36
- 238000002156 mixing Methods 0.000 claims description 36
- 229920000647 polyepoxide Polymers 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 238000001035 drying Methods 0.000 claims description 35
- 239000000203 mixture Substances 0.000 claims description 32
- 239000006185 dispersion Substances 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 30
- 238000005406 washing Methods 0.000 claims description 30
- 229920001661 Chitosan Polymers 0.000 claims description 29
- 238000000967 suction filtration Methods 0.000 claims description 25
- 238000005303 weighing Methods 0.000 claims description 21
- 238000010992 reflux Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 239000006184 cosolvent Substances 0.000 claims description 15
- 239000007822 coupling agent Substances 0.000 claims description 15
- 239000002270 dispersing agent Substances 0.000 claims description 15
- 235000019441 ethanol Nutrition 0.000 claims description 15
- 238000000227 grinding Methods 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 15
- 239000002562 thickening agent Substances 0.000 claims description 15
- 239000013530 defoamer Substances 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 13
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 10
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 10
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 7
- 229920000570 polyether Polymers 0.000 claims description 7
- 150000001412 amines Chemical class 0.000 claims description 6
- MWOOGOJBHIARFG-UHFFFAOYSA-N vanillin Chemical compound COC1=CC(C=O)=CC=C1O MWOOGOJBHIARFG-UHFFFAOYSA-N 0.000 claims description 6
- FGQOOHJZONJGDT-UHFFFAOYSA-N vanillin Natural products COC1=CC(O)=CC(C=O)=C1 FGQOOHJZONJGDT-UHFFFAOYSA-N 0.000 claims description 6
- 235000012141 vanillin Nutrition 0.000 claims description 6
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 5
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 5
- 229910019142 PO4 Inorganic materials 0.000 claims description 5
- 235000019270 ammonium chloride Nutrition 0.000 claims description 5
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 5
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 5
- 125000000129 anionic group Chemical group 0.000 claims description 5
- 239000002518 antifoaming agent Substances 0.000 claims description 5
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 5
- 239000004327 boric acid Substances 0.000 claims description 5
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 5
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 5
- 239000000347 magnesium hydroxide Substances 0.000 claims description 5
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 5
- 239000002480 mineral oil Substances 0.000 claims description 5
- 235000010446 mineral oil Nutrition 0.000 claims description 5
- 235000019837 monoammonium phosphate Nutrition 0.000 claims description 5
- 239000006012 monoammonium phosphate Substances 0.000 claims description 5
- 239000010452 phosphate Substances 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 5
- 229920005646 polycarboxylate Polymers 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 5
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 5
- 239000003063 flame retardant Substances 0.000 abstract description 5
- 125000000524 functional group Chemical group 0.000 abstract description 4
- 239000003607 modifier Substances 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 238000007306 functionalization reaction Methods 0.000 abstract description 2
- 230000002209 hydrophobic effect Effects 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 abstract description 2
- 239000003973 paint Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000004224 protection Effects 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000006750 UV protection Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
- C08G59/1477—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing nitrogen
-
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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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
- 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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- 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
- C09D7/65—Additives macromolecular
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Plant Pathology (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
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- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of building coating and provides a building coating with corrosion resistance and a preparation method thereof, wherein modified graphene, fumed silica and organosilicon modified titanium dioxide are added into raw materials of the building coating to enhance the corrosion resistance of the building coating, octadecylamine is used as a modifier to modify graphene jin, and hydrophilic functional groups on the surface of the graphene can be converted into hydrophobic functional groups by a covalent/non-covalent functionalization method, so that a compact isolation layer can be formed in the building coating to enhance the corrosion resistance of the coating; and secondly, the nano titanium dioxide modified by the silane coupling agent can have stable antibacterial flame retardant property, and the nano titanium dioxide can be added into the building coating to ensure that the building coating has more excellent mechanical property on the basis of enhancing the antibacterial flame retardant property of the building coating, so that the building coating prepared by the invention has better market application.
Description
Technical Field
The invention relates to the technical field of building coatings, in particular to a building coating with corrosion resistance and a preparation method thereof.
Background
Coatings applied to buildings, decorative buildings, or protective buildings are collectively referred to as architectural coatings. The building paint has decoration function, protection function and residence improvement function, and the specific weight of each function is different according to the purpose of use. The decoration function is a function of improving the appearance value of a building through the beautification of the building. The protection function is a function of protecting a building from being influenced and destroyed by the environment, the content of the protection function requirements of different kinds of protected objects is different, for example, the index difference required to be achieved by indoor and outdoor coating is very large, and some buildings have special requirements on mildew resistance, fire resistance, heat preservation, heat insulation, corrosion resistance and the like. The residence improving function is mainly a function that contributes to improvement of living environment, such as sound insulation, sound absorbing paint, classification thereof, dew prevention, and the like, for indoor painting. Due to the wide range of applications of architectural coatings, many varieties with different properties are presented in the market.
As disclosed in chinese patent No. CN202211168800.5, a high-strength heat-insulating building coating and a preparation method thereof can reduce the time for linking the processes and reduce the waste of raw materials, but the preparation method is mainly optimized in the preparation process, only the superposition and mixing of the raw materials of each component are performed, the performance of the building coating itself cannot be improved, and the emulsion stability of the thermal building coating prepared by the preparation method is low, so how to design a preparation method of the building coating, so that the performance of the building coating can be improved on the basis of optimizing the preparation process, becomes a technical problem to be solved by those skilled in the art.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects existing in the prior art, the invention provides the building coating with corrosion resistance and the preparation method thereof, and aims to improve the performance of the building coating on the basis of optimizing the preparation process and ensure that the application range of the building coating is wider.
Technical proposal
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the building coating with corrosion resistance comprises the following raw materials: modified epoxy resin, modified graphene, organosilicon modified titanium dioxide, a modified chitosan component, fumed silica, a dispersing agent, a defoaming agent, a cosolvent, a coupling agent and a thickening agent.
Further, the preparation method of the modified epoxy resin comprises the following steps: pouring 100 parts of epoxy resin, 8-10 parts of polyether amine and 7-8 parts of propylene glycol methyl ether acetate into a reaction kettle, heating to 80 ℃, preserving heat for 30min, continuously heating to 120 ℃, preserving heat and stirring for 4-5h, adding 60-80 parts of epoxy resin and 5-8 parts of propylene glycol methyl ether acetate for mixing after the reaction, heating to 100 ℃, preserving heat for 1h, cooling to 60 ℃, filtering and discharging, and obtaining the modified epoxy resin.
Further, the preparation method of the modified chitosan component comprises the following steps:
step 1, 10 parts of chitosan is soaked in 50 parts of ethanol solution, then placed at 60 ℃ for standing and soaking for 2 hours, and subjected to ultrasonic dispersion for standby;
step 2, weighing 60 parts of absolute ethyl alcohol and 60 parts of isopropanol, uniformly mixing, adding 15 parts of vanillin, uniformly mixing again, pouring the mixture into the system in the step 1, stirring and mixing, standing for 4 hours at 60 ℃, and then heating to 40 ℃ for reaction for 2 hours;
and 3, filtering the system in the step 2, washing a product obtained by filtering by using absolute ethyl alcohol, washing by using deionized water after washing, and finally, refluxing and purifying by using absolute ethyl alcohol in a Soxhlet extractor for 8 hours, and then, drying in a drying oven at 60 ℃ to obtain powder, namely the modified chitosan component.
Further, the concentration of the ethanol solution in the step 1 is 95%, the frequency of ultrasonic dispersion is 22-26kHz, and the ultrasonic dispersion time is 25-30min.
Further, the preparation method of the modified graphene comprises the following steps:
1) Dispersing 1-2 parts of graphene in 100 parts of N, N-dimethylformamide, then performing ultrasonic dispersion at a frequency of 26-28kHz for 30min to obtain a first component, weighing 0.5-0.6 part of octadecylamine, dispersing in 100 parts of absolute ethyl alcohol at 40 ℃, and stirring at a stirring speed of 500-600r/min for 10min to obtain a second component;
2) Mixing the first component and the second component, placing in a constant-temperature water bath magnetic stirrer, condensing and refluxing under the water bath condition of 95 ℃, stirring for 12 hours, performing suction filtration, washing the suction filtration product for 3 times by using absolute ethyl alcohol, and finally drying in a drying oven of 60 ℃, and grinding into powder to obtain the modified graphene.
Further, the preparation method of the organosilicon modified titanium dioxide comprises the following steps:
step a, weighing 5-8 parts of nano titanium dioxide to be dispersed in 100 parts of absolute ethyl alcohol, then adding 3-4 parts of magnesium hydroxide, 1-2 parts of monoammonium phosphate, 2-3 parts of ammonium chloride, 1-2 parts of phosphate and 1-2 parts of boric acid, and performing ultrasonic dispersion for 10min to obtain a dispersion liquid;
and b, adding 6-10 parts of silane coupling agent into the dispersion liquid in the step a, uniformly mixing, stirring for 20min at a stirring speed of 400-500r/min, then placing in a constant-temperature water bath magnetic stirrer, condensing and refluxing under a water bath condition of 95 ℃, stirring for 12h, performing suction filtration, washing the suction filtration product for 3 times by using absolute ethyl alcohol, finally placing in a drying oven of 60 ℃, drying, and grinding into powder to obtain the organosilicon modified titanium dioxide.
Still further, the silane coupling agent in the step b is KH550.
Still further, the dispersant is an anionic polycarboxylate and the defoamer is a mineral oil-based defoamer.
Further, the cosolvent is an ethanol solution with the concentration of 40%, the coupling agent is KH560, and the thickener is hydroxyethyl cellulose ether.
A method for preparing an architectural coating having corrosion resistance, the method comprising the steps of:
s1, 1-2 parts of modified graphene is weighed and dispersed in 500 parts of N, N-dimethylformamide, ultrasonic dispersion is carried out for 15min at the frequency of 26-28kHz to obtain modified graphene dispersion liquid, 5-6 parts of organosilicon modified titanium dioxide is weighed and dispersed in 500 parts of absolute ethyl alcohol, ultrasonic dispersion is carried out for 15min at the frequency of 26-28kHz to obtain organosilicon modified titanium dioxide dispersion liquid;
s2, magnetically stirring the modified graphene dispersion liquid and the organosilicon modified titanium dioxide dispersion liquid obtained in the S1 under the water bath condition of 95 ℃, condensing and refluxing for 12 hours, performing suction filtration while the mixture is hot, washing the mixture with deionized water for 3 times, drying the mixture in a vacuum drying oven of 60 ℃ for 24 hours, dispersing the mixture in 500 parts of N, N-dimethylformamide after grinding, and recording the mixture as a dispersing component after ultrasonic dispersion for 15 minutes at the frequency of 26-28 kHz;
s3, adding 10-15 parts of dispersing component, 5-8 parts of modified chitosan component, 3-4 parts of fumed silica, 3-5 parts of dispersing agent, 1-2 parts of defoamer, 5-8 parts of cosolvent, 2-3 parts of coupling agent and 1-2 parts of thickener into 100 parts of modified epoxy resin, mixing and stirring for 30min at a stirring speed of 800-1000r/min, and obtaining the building coating with corrosion resistance.
Advantageous effects
The invention provides a building coating with corrosion resistance and a preparation method thereof, and compared with the prior art, the building coating has the following beneficial effects:
1. in the preparation process of the modified epoxy resin, polyether amine is used as a modifier, and a long-chain polyether structure can be introduced into an epoxy resin molecular chain through ring-opening reaction of epoxy groups, so that the epoxy resin has stable hydrophilic performance; secondly, vanillin and chitosan are used as raw materials to prepare a modified chitosan component, and the modified chitosan component is added into the modified epoxy resin to influence the performance of the modified epoxy resin, and as the modified chitosan component has the capability of absorbing stronger external light, the modified epoxy resin has better ultraviolet resistance, so that the ageing resistance of the building coating prepared by the invention is improved to a certain extent, and the service life of the building coating is prolonged.
2. According to the invention, the modified graphene, the fumed silica and the organosilicon modified titanium dioxide are added into the raw materials of the building coating, so that the corrosion resistance of the building coating can be enhanced, octadecylamine is used as a modifier to modify graphene jin, and the hydrophilic functional groups on the surface of the graphene can be converted into hydrophobic functional groups by a covalent/non-covalent functionalization method, so that a compact isolation layer can be formed in the building coating to enhance the corrosion resistance of the coating; and secondly, the nano titanium dioxide modified by the silane coupling agent can have stable antibacterial flame retardant property, and the nano titanium dioxide can be added into the building coating to ensure that the building coating has more excellent mechanical property on the basis of enhancing the antibacterial flame retardant property of the building coating, so that the building coating prepared by the invention has better market application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is further described below with reference to examples.
Example 1
The building coating with corrosion resistance comprises the following raw materials: modified epoxy resin, modified graphene, organosilicon modified titanium dioxide, a modified chitosan component, fumed silica, a dispersing agent, a defoaming agent, a cosolvent, a coupling agent and a thickening agent.
The preparation method of the modified epoxy resin comprises the following steps: pouring 100 parts of epoxy resin, 8 parts of polyether amine and 7 parts of propylene glycol methyl ether acetate into a reaction kettle, heating to 80 ℃, preserving heat for 30min, continuously heating to 120 ℃, preserving heat, stirring for 4h, adding 60 parts of epoxy resin and 5 parts of propylene glycol methyl ether acetate for mixing after the reaction is finished, heating to 100 ℃, preserving heat for 1h, cooling to 60 ℃, filtering and discharging to obtain the modified epoxy resin.
The preparation method of the modified chitosan component comprises the following steps:
step 1, 10 parts of chitosan is soaked in 50 parts of ethanol solution, then placed at 60 ℃ for standing and soaking for 2 hours, and subjected to ultrasonic dispersion for standby;
step 2, weighing 60 parts of absolute ethyl alcohol and 60 parts of isopropanol, uniformly mixing, adding 15 parts of vanillin, uniformly mixing again, pouring the mixture into the system in the step 1, stirring and mixing, standing for 4 hours at 60 ℃, and then heating to 40 ℃ for reaction for 2 hours;
and 3, filtering the system in the step 2, washing a product obtained by filtering by using absolute ethyl alcohol, washing by using deionized water after washing, and finally, refluxing and purifying by using absolute ethyl alcohol in a Soxhlet extractor for 8 hours, and then, drying in a drying oven at 60 ℃ to obtain powder, namely the modified chitosan component.
The concentration of the ethanol solution in the step 1 is 95%, the ultrasonic dispersion frequency is 22kHz, and the ultrasonic dispersion time is 25min.
The preparation method of the modified graphene comprises the following steps:
1) Dispersing 1 part of graphene in 100 parts of N, N-dimethylformamide, then performing ultrasonic dispersion at a frequency of 26kHz for 30min to obtain a first component, weighing 0.5 part of octadecylamine, dispersing in 100 parts of absolute ethyl alcohol at 40 ℃, and stirring at a stirring speed of 500r/min for 10min to obtain a second component;
2) Mixing the first component and the second component, placing in a constant-temperature water bath magnetic stirrer, condensing and refluxing under the water bath condition of 95 ℃, stirring for 12 hours, performing suction filtration, washing the suction filtration product for 3 times by using absolute ethyl alcohol, and finally drying in a drying oven of 60 ℃, and grinding into powder to obtain the modified graphene.
The preparation method of the organosilicon modified titanium dioxide comprises the following steps:
step a, weighing 5 parts of nano titanium dioxide, dispersing in 100 parts of absolute ethyl alcohol, adding 3 parts of magnesium hydroxide, 1 part of monoammonium phosphate, 2 parts of ammonium chloride, 1 part of phosphate and 1 part of boric acid, and performing ultrasonic dispersion for 10 minutes to obtain a dispersion liquid;
and b, adding 6 parts of silane coupling agent into the dispersion liquid in the step a, uniformly mixing, stirring for 20min at a stirring speed of 400r/min, then placing in a constant-temperature water bath magnetic stirrer, condensing and refluxing under a water bath condition of 95 ℃, stirring for 12h, performing suction filtration, washing the suction filtration product for 3 times by using absolute ethyl alcohol, and finally placing in a drying oven of 60 ℃ for drying, and grinding into powder to obtain the organosilicon modified titanium dioxide.
The silane coupling agent in step b was KH550.
The dispersant is anionic polycarboxylate, and the defoamer is mineral oil-based defoamer.
The cosolvent is ethanol solution with concentration of 40%, the coupling agent is KH560, and the thickener is hydroxyethyl cellulose ether.
A preparation method of a building coating with corrosion resistance comprises the following steps:
s1, weighing 1 part of modified graphene, dispersing in 500 parts of N, N-dimethylformamide, performing ultrasonic dispersion for 15min at the frequency of 26kHz to obtain modified graphene dispersion liquid, weighing 5 parts of organosilicon modified titanium dioxide, dispersing in 500 parts of absolute ethyl alcohol, and performing ultrasonic dispersion for 15min at the frequency of 26kHz to obtain organosilicon modified titanium dioxide dispersion liquid;
s2, magnetically stirring the modified graphene dispersion liquid and the organosilicon modified titanium dioxide dispersion liquid obtained in the S1 under the water bath condition of 95 ℃, condensing and refluxing for 12 hours, performing suction filtration while the mixture is hot, washing the mixture with deionized water for 3 times, drying the mixture in a vacuum drying oven of 60 ℃ for 24 hours, dispersing the mixture in 500 parts of N, N-dimethylformamide after grinding, and recording the mixture as a dispersing component after ultrasonic dispersion for 15 minutes at the frequency of 26 kHz;
s3, adding 10 parts of dispersing component, 5 parts of modified chitosan component, 3 parts of fumed silica, 3 parts of dispersing agent, 1 part of defoamer, 5 parts of cosolvent, 2 parts of coupling agent and 1 part of thickener into 100 parts of modified epoxy resin, mixing and stirring for 30min at a stirring speed of 800r/min, and obtaining the building coating with corrosion resistance.
Example 2
The building coating with corrosion resistance comprises the following raw materials: modified epoxy resin, modified graphene, organosilicon modified titanium dioxide, a modified chitosan component, fumed silica, a dispersing agent, a defoaming agent, a cosolvent, a coupling agent and a thickening agent.
The preparation method of the modified epoxy resin comprises the following steps: 100 parts of epoxy resin, 10 parts of polyether amine and 8 parts of propylene glycol methyl ether acetate are poured into a reaction kettle, the temperature is raised to 80 ℃ and then kept for 30min, then the temperature is continuously raised to 120 ℃ and kept for 5h, 80 parts of epoxy resin and 8 parts of propylene glycol methyl ether acetate are added for mixing after the reaction is finished, the temperature is raised to 100 ℃ and then kept for 1h, the temperature is lowered to 60 ℃, and the mixture is filtered and discharged, so that the modified epoxy resin is obtained.
The preparation method of the modified chitosan component comprises the following steps:
step 1, 10 parts of chitosan is soaked in 50 parts of ethanol solution, then placed at 60 ℃ for standing and soaking for 2 hours, and subjected to ultrasonic dispersion for standby;
step 2, weighing 60 parts of absolute ethyl alcohol and 60 parts of isopropanol, uniformly mixing, adding 15 parts of vanillin, uniformly mixing again, pouring the mixture into the system in the step 1, stirring and mixing, standing for 4 hours at 60 ℃, and then heating to 40 ℃ for reaction for 2 hours;
and 3, filtering the system in the step 2, washing a product obtained by filtering by using absolute ethyl alcohol, washing by using deionized water after washing, and finally, refluxing and purifying by using absolute ethyl alcohol in a Soxhlet extractor for 8 hours, and then, drying in a drying oven at 60 ℃ to obtain powder, namely the modified chitosan component.
The concentration of the ethanol solution in the step 1 is 95%, the ultrasonic dispersion frequency is 26kHz, and the ultrasonic dispersion time is 30min.
The preparation method of the modified graphene comprises the following steps:
1) Dispersing 2 parts of graphene in 100 parts of N, N-dimethylformamide, then performing ultrasonic dispersion at a frequency of 28kHz for 30min to obtain a first component, weighing 0.6 part of octadecylamine, dispersing in 100 parts of absolute ethyl alcohol at 40 ℃, and stirring at a stirring speed of 600r/min for 10min to obtain a second component;
2) Mixing the first component and the second component, placing in a constant-temperature water bath magnetic stirrer, condensing and refluxing under the water bath condition of 95 ℃, stirring for 12 hours, performing suction filtration, washing the suction filtration product for 3 times by using absolute ethyl alcohol, and finally drying in a drying oven of 60 ℃, and grinding into powder to obtain the modified graphene.
The preparation method of the organosilicon modified titanium dioxide comprises the following steps:
step a, weighing 8 parts of nano titanium dioxide to be dispersed in 100 parts of absolute ethyl alcohol, then adding 4 parts of magnesium hydroxide, 2 parts of monoammonium phosphate, 3 parts of ammonium chloride, 2 parts of phosphate and 2 parts of boric acid, and performing ultrasonic dispersion for 10 minutes to obtain a dispersion liquid;
and b, adding 10 parts of silane coupling agent into the dispersion liquid in the step a, uniformly mixing, stirring for 20min at a stirring speed of 500r/min, then placing in a constant-temperature water bath magnetic stirrer, condensing and refluxing under a water bath condition of 95 ℃, stirring for 12h, performing suction filtration, washing the suction filtration product for 3 times by using absolute ethyl alcohol, and finally placing in a drying oven of 60 ℃ for drying, and grinding into powder to obtain the organosilicon modified titanium dioxide.
The silane coupling agent in step b was KH550.
The dispersant is anionic polycarboxylate, and the defoamer is mineral oil-based defoamer.
The cosolvent is ethanol solution with concentration of 40%, the coupling agent is KH560, and the thickener is hydroxyethyl cellulose ether.
A preparation method of a building coating with corrosion resistance comprises the following steps:
s1, weighing 2 parts of modified graphene, dispersing in 500 parts of N, N-dimethylformamide, performing ultrasonic dispersion for 15min at the frequency of 28kHz to obtain modified graphene dispersion liquid, weighing 6 parts of organosilicon modified titanium dioxide, dispersing in 500 parts of absolute ethyl alcohol, and performing ultrasonic dispersion for 15min at the frequency of 28kHz to obtain organosilicon modified titanium dioxide dispersion liquid;
s2, magnetically stirring the modified graphene dispersion liquid and the organosilicon modified titanium dioxide dispersion liquid obtained in the S1 under the water bath condition of 95 ℃, condensing and refluxing for 12 hours, performing suction filtration while the mixture is hot, washing the mixture with deionized water for 3 times, drying the mixture in a vacuum drying oven of 60 ℃ for 24 hours, dispersing the mixture in 500 parts of N, N-dimethylformamide after grinding, and recording the mixture as a dispersing component after ultrasonic dispersion for 15 minutes at the frequency of 28 kHz;
and S3, adding 15 parts of dispersing component, 8 parts of modified chitosan component, 4 parts of fumed silica, 5 parts of dispersing agent, 2 parts of defoamer, 8 parts of cosolvent, 3 parts of coupling agent and 2 parts of thickener into 100 parts of modified epoxy resin, mixing and stirring for 30min at a stirring speed of 1000r/min, and obtaining the building coating with corrosion resistance.
Example 3
The building coating with corrosion resistance comprises the following raw materials: modified epoxy resin, modified graphene, organosilicon modified titanium dioxide, a modified chitosan component, fumed silica, a dispersing agent, a defoaming agent, a cosolvent, a coupling agent and a thickening agent.
The preparation method of the modified epoxy resin comprises the following steps: 100 parts of epoxy resin, 9 parts of polyether amine and 7 parts of propylene glycol methyl ether acetate are poured into a reaction kettle, the temperature is raised to 80 ℃ and then kept for 30min, then the temperature is continuously raised to 120 ℃ and kept for 5h, 70 parts of epoxy resin and 7 parts of propylene glycol methyl ether acetate are added for mixing after the reaction is finished, the temperature is raised to 100 ℃ and then kept for 1h, the temperature is lowered to 60 ℃, and the mixture is filtered and discharged, so that the modified epoxy resin is obtained.
The preparation method of the modified chitosan component comprises the following steps:
step 1, 10 parts of chitosan is soaked in 50 parts of ethanol solution, then placed at 60 ℃ for standing and soaking for 2 hours, and subjected to ultrasonic dispersion for standby;
step 2, weighing 60 parts of absolute ethyl alcohol and 60 parts of isopropanol, uniformly mixing, adding 15 parts of vanillin, uniformly mixing again, pouring the mixture into the system in the step 1, stirring and mixing, standing for 4 hours at 60 ℃, and then heating to 40 ℃ for reaction for 2 hours;
and 3, filtering the system in the step 2, washing a product obtained by filtering by using absolute ethyl alcohol, washing by using deionized water after washing, and finally, refluxing and purifying by using absolute ethyl alcohol in a Soxhlet extractor for 8 hours, and then, drying in a drying oven at 60 ℃ to obtain powder, namely the modified chitosan component.
The concentration of the ethanol solution in the step 1 is 95%, the ultrasonic dispersion frequency is 24kHz, and the ultrasonic dispersion time is 28min.
The preparation method of the modified graphene comprises the following steps:
1) Dispersing 2 parts of graphene in 100 parts of N, N-dimethylformamide, then performing ultrasonic dispersion at a frequency of 27kHz for 30min to obtain a first component, weighing 0.6 part of octadecylamine, dispersing in 100 parts of absolute ethyl alcohol at 40 ℃, and stirring at a stirring speed of 500r/min for 10min to obtain a second component;
2) Mixing the first component and the second component, placing in a constant-temperature water bath magnetic stirrer, condensing and refluxing under the water bath condition of 95 ℃, stirring for 12 hours, performing suction filtration, washing the suction filtration product for 3 times by using absolute ethyl alcohol, and finally drying in a drying oven of 60 ℃, and grinding into powder to obtain the modified graphene.
The preparation method of the organosilicon modified titanium dioxide comprises the following steps:
step a, weighing 6 parts of nano titanium dioxide to be dispersed in 100 parts of absolute ethyl alcohol, then adding 4 parts of magnesium hydroxide, 2 parts of monoammonium phosphate, 2 parts of ammonium chloride, 1 part of phosphate and 2 parts of boric acid, and performing ultrasonic dispersion for 10 minutes to prepare dispersion liquid;
and b, adding 8 parts of silane coupling agent into the dispersion liquid in the step a, uniformly mixing, stirring for 20min at a stirring speed of 500r/min, then placing in a constant-temperature water bath magnetic stirrer, condensing and refluxing under a water bath condition of 95 ℃, stirring for 12h, performing suction filtration, washing the suction filtration product for 3 times by using absolute ethyl alcohol, and finally placing in a drying oven of 60 ℃ for drying, and grinding into powder to obtain the organosilicon modified titanium dioxide.
The silane coupling agent in step b was KH550.
The dispersant is anionic polycarboxylate, and the defoamer is mineral oil-based defoamer.
The cosolvent is ethanol solution with concentration of 40%, the coupling agent is KH560, and the thickener is hydroxyethyl cellulose ether.
A preparation method of a building coating with corrosion resistance comprises the following steps:
s1, weighing 2 parts of modified graphene, dispersing in 500 parts of N, N-dimethylformamide, performing ultrasonic dispersion for 15min at the frequency of 27kHz to obtain modified graphene dispersion liquid, weighing 5 parts of organosilicon modified titanium dioxide, dispersing in 500 parts of absolute ethyl alcohol, and performing ultrasonic dispersion for 15min at the frequency of 27kHz to obtain organosilicon modified titanium dioxide dispersion liquid;
s2, magnetically stirring the modified graphene dispersion liquid and the organosilicon modified titanium dioxide dispersion liquid obtained in the S1 under the water bath condition of 95 ℃, condensing and refluxing for 12 hours, performing suction filtration while the mixture is hot, washing the mixture with deionized water for 3 times, drying the mixture in a vacuum drying oven of 60 ℃ for 24 hours, dispersing the mixture in 500 parts of N, N-dimethylformamide after grinding, and recording the mixture as a dispersing component after ultrasonic dispersion for 15 minutes at the frequency of 27 kHz;
s3, adding 12 parts of dispersing components, 7 parts of modified chitosan components, 4 parts of fumed silica, 4 parts of dispersing agents, 1 part of defoamers, 6 parts of cosolvent, 3 parts of coupling agents and 2 parts of thickeners into 100 parts of modified epoxy resin, mixing and stirring for 30min at a stirring speed of 900r/min, and obtaining the building coating with corrosion resistance.
Performance testing
The architectural coatings with corrosion resistance prepared in examples 1 to 3 were respectively labeled as examples 1 to 3, the commercially available corrosion resistant architectural coatings were labeled as comparative examples, the coatings were prepared in the same brushing manner in examples 1 to 3 and comparative examples, and the corrosion resistance and other properties of the coatings were measured and recorded in the following table:
as shown by the data in the table, the salt water resistance and salt fog resistance of the building paint with corrosion resistance prepared in the examples 1-3 are better, so that the building paint with corrosion resistance prepared in the invention has better corrosion resistance, and compared with the building paint with corrosion resistance prepared in the comparative example, the building paint with corrosion resistance prepared in the invention has more excellent antibacterial and flame retardant properties, thereby having better market application prospect.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The building coating with corrosion resistance is characterized by comprising the following raw materials: modified epoxy resin, modified graphene, organosilicon modified titanium dioxide, a modified chitosan component, fumed silica, a dispersing agent, a defoaming agent, a cosolvent, a coupling agent and a thickening agent.
2. The building coating with corrosion resistance according to claim 1, wherein the preparation method of the modified epoxy resin is as follows: pouring 100 parts of epoxy resin, 8-10 parts of polyether amine and 7-8 parts of propylene glycol methyl ether acetate into a reaction kettle, heating to 80 ℃, preserving heat for 30min, continuously heating to 120 ℃, preserving heat and stirring for 4-5h, adding 60-80 parts of epoxy resin and 5-8 parts of propylene glycol methyl ether acetate for mixing after the reaction, heating to 100 ℃, preserving heat for 1h, cooling to 60 ℃, filtering and discharging, and obtaining the modified epoxy resin.
3. The building coating with corrosion resistance according to claim 1, wherein the preparation method of the modified chitosan component comprises the following steps:
step 1, 10 parts of chitosan is soaked in 50 parts of ethanol solution, then placed at 60 ℃ for standing and soaking for 2 hours, and subjected to ultrasonic dispersion for standby;
step 2, weighing 60 parts of absolute ethyl alcohol and 60 parts of isopropanol, uniformly mixing, adding 15 parts of vanillin, uniformly mixing again, pouring the mixture into the system in the step 1, stirring and mixing, standing for 4 hours at 60 ℃, and then heating to 40 ℃ for reaction for 2 hours;
and 3, filtering the system in the step 2, washing a product obtained by filtering by using absolute ethyl alcohol, washing by using deionized water after washing, and finally, refluxing and purifying by using absolute ethyl alcohol in a Soxhlet extractor for 8 hours, and then, drying in a drying oven at 60 ℃ to obtain powder, namely the modified chitosan component.
4. A corrosion resistant architectural coating according to claim 3, wherein the concentration of the ethanol solution in step 1 is 95%, the frequency of ultrasonic dispersion is 22-26kHz, and the ultrasonic dispersion time is 25-30min.
5. The building coating with corrosion resistance according to claim 1, wherein the preparation method of the modified graphene is as follows:
1) Dispersing 1-2 parts of graphene in 100 parts of N, N-dimethylformamide, then performing ultrasonic dispersion at a frequency of 26-28kHz for 30min to obtain a first component, weighing 0.5-0.6 part of octadecylamine, dispersing in 100 parts of absolute ethyl alcohol at 40 ℃, and stirring at a stirring speed of 500-600r/min for 10min to obtain a second component;
2) Mixing the first component and the second component, placing in a constant-temperature water bath magnetic stirrer, condensing and refluxing under the water bath condition of 95 ℃, stirring for 12 hours, performing suction filtration, washing the suction filtration product for 3 times by using absolute ethyl alcohol, and finally drying in a drying oven of 60 ℃, and grinding into powder to obtain the modified graphene.
6. The building coating with corrosion resistance according to claim 1, wherein the preparation method of the organosilicon modified titanium dioxide comprises the following steps:
step a, weighing 5-8 parts of nano titanium dioxide to be dispersed in 100 parts of absolute ethyl alcohol, then adding 3-4 parts of magnesium hydroxide, 1-2 parts of monoammonium phosphate, 2-3 parts of ammonium chloride, 1-2 parts of phosphate and 1-2 parts of boric acid, and performing ultrasonic dispersion for 10min to obtain a dispersion liquid;
and b, adding 6-10 parts of silane coupling agent into the dispersion liquid in the step a, uniformly mixing, stirring for 20min at a stirring speed of 400-500r/min, then placing in a constant-temperature water bath magnetic stirrer, condensing and refluxing under a water bath condition of 95 ℃, stirring for 12h, performing suction filtration, washing the suction filtration product for 3 times by using absolute ethyl alcohol, finally placing in a drying oven of 60 ℃, drying, and grinding into powder to obtain the organosilicon modified titanium dioxide.
7. The architectural coating with corrosion resistance according to claim 6, wherein the silane coupling agent in step b is KH550.
8. The corrosion resistant architectural coating according to claim 1, wherein said dispersant is an anionic polycarboxylate and said defoamer is a mineral oil based defoamer.
9. The building coating with corrosion resistance according to claim 1, wherein the cosolvent is an ethanol solution with a concentration of 40%, the coupling agent is KH560, and the thickener is hydroxyethyl cellulose ether.
10. A method for preparing a corrosion resistant architectural coating according to any one of claims 1-9, comprising the steps of:
s1, 1-2 parts of modified graphene is weighed and dispersed in 500 parts of N, N-dimethylformamide, ultrasonic dispersion is carried out for 15min at the frequency of 26-28kHz to obtain modified graphene dispersion liquid, 5-6 parts of organosilicon modified titanium dioxide is weighed and dispersed in 500 parts of absolute ethyl alcohol, ultrasonic dispersion is carried out for 15min at the frequency of 26-28kHz to obtain organosilicon modified titanium dioxide dispersion liquid;
s2, magnetically stirring the modified graphene dispersion liquid and the organosilicon modified titanium dioxide dispersion liquid obtained in the S1 under the water bath condition of 95 ℃, condensing and refluxing for 12 hours, performing suction filtration while the mixture is hot, washing the mixture with deionized water for 3 times, drying the mixture in a vacuum drying oven of 60 ℃ for 24 hours, dispersing the mixture in 500 parts of N, N-dimethylformamide after grinding, and recording the mixture as a dispersing component after ultrasonic dispersion for 15 minutes at the frequency of 26-28 kHz;
s3, adding 10-15 parts of dispersing component, 5-8 parts of modified chitosan component, 3-4 parts of fumed silica, 3-5 parts of dispersing agent, 1-2 parts of defoamer, 5-8 parts of cosolvent, 2-3 parts of coupling agent and 1-2 parts of thickener into 100 parts of modified epoxy resin, mixing and stirring for 30min at a stirring speed of 800-1000r/min, and obtaining the building coating with corrosion resistance.
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