CN114561140A - Electrostatic shielding graphene anticorrosive material and preparation method thereof - Google Patents
Electrostatic shielding graphene anticorrosive material and preparation method thereof Download PDFInfo
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- CN114561140A CN114561140A CN202210201259.7A CN202210201259A CN114561140A CN 114561140 A CN114561140 A CN 114561140A CN 202210201259 A CN202210201259 A CN 202210201259A CN 114561140 A CN114561140 A CN 114561140A
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Images
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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- 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
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
-
- 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
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
Abstract
The invention belongs to the technical field of anticorrosive coatings, and particularly discloses an electrostatic shielding graphene anticorrosive material and a preparation method thereof, wherein the electrostatic shielding graphene anticorrosive coating comprises a component A and a component B according to a mass ratio of 10-25: 1: the component A comprises: 20-50% of epoxy resin, 1-5% of coupling agent, 1-10% of rheological additive, 1-15% of graphene powder, 2-15% of dispersant, 10-55% of zinc powder, 10-15% of filler and 5-25% of mixed solvent; the component B comprises: 15-45% of curing agent and 55-85% of mixed solvent, the invention has low requirements on base material treatment, only needs to be treated to Sa1.0 level, the paint film can have excellent adhesive force, does not need to be treated to Sa2.5 level like the requirement of the traditional anticorrosive paint on the base material, and can omit most of pretreatment procedures.
Description
Technical Field
The invention relates to an electrostatic shielding graphene anticorrosive material and a preparation method thereof, and belongs to the technical field of anticorrosive coatings.
Background
Graphene epoxy anticorrosive paint is a paint with high anticorrosive ability obtained by adding graphene powder into solvent-based paint and uniformly dispersing, and can greatly improve various performance indexes of the paint including anticorrosive performance through a unique two-dimensional lamellar structure of graphene, and can endow partial special functions which are not possessed by the traditional epoxy anticorrosive paint, including ultraviolet resistance, wear resistance, antibacterial property and the like. The graphene epoxy anticorrosive paint can be combined with fluorocarbon finish paint or polyurethane finish paint in an epoxy paint system for use, and the color of a primer paint film is changed through the finish paint, so that the film forming color of the paint is adjusted. By adding graphene into the coating, the characteristic of large specific surface area of the graphene is applied, so that uniform coverage is formed in the coating, and a base material is protected; meanwhile, a labyrinth effect is generated in the coating through a two-dimensional lamellar structure of the graphene, so that the permeation of moisture, ions and oxygen is slowed down, the corrosion process is delayed, and the high corrosion resistance is achieved. The graphene epoxy anticorrosive paint has the anticorrosive performance far exceeding that of the conventional epoxy anticorrosive paint.
Disclosure of Invention
The invention aims to provide an electrostatic shielding graphene anticorrosive material and a preparation method thereof, and solves the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the electrostatic shielding graphene anticorrosive material comprises a component A and a component B according to a mass ratio of 10-25: 1:
the component A comprises: 20-50% of epoxy resin, 1-5% of coupling agent, 1-10% of rheological additive, 1-15% of graphene powder, 2-15% of dispersant, 10-55% of zinc powder, 10-15% of filler and 5-25% of mixed solvent;
the component B comprises: 15-45% of curing agent and 55-85% of mixed solvent.
Preferably, the epoxy resin is selected from any one of a low molecular weight bisphenol a type epoxy resin, a medium molecular weight bisphenol a type epoxy resin, a high molecular weight bisphenol a type epoxy resin, and a novolac epoxy resin.
Preferably, the coupling agent is one or more selected from aminopropyltriethoxysilane, aminopropyltrimethoxysilane, 2-aminoethylaminopropyltrimethoxysilane, diethylenetriaminopropyltrimethoxysilane, aminoethylaminopropylmethyldimethoxysilane, aminoethylaminopropyltriethoxysilane, ureidopropyltriethoxysilane and ureidopropyltrimethoxysilane.
Preferably, the rheological additive is selected from one or more of organic bentonite, polyethylene wax and polyamide wax.
Preferably, the sheet diameter of the graphene powder is 10-50 μm.
Preferably, the dispersant is one or more selected from a copolymer solution containing acidic functional groups, a composition of polar acid ester and high molecular alcohol, and alkyl ammonium salt of high molecular weight copolymer.
Preferably, the filler is one or more of mica iron oxide ash, iron calcium powder, phosphorus titanium powder, phosphorus iron, porous carbon microspheres, a nettle leaf extract or 4(5) -ethylamino imidazole.
Preferably, the method comprises the following steps:
s1, preparing a component A:
mixing and stirring epoxy resin, rheological additive and mixed solvent at normal temperature to obtain homogeneous liquid, sequentially adding graphene powder, dispersant, zinc powder, filler and coupling agent into the mixed solution, continuously stirring, kneading for 30 minutes after the addition is finished, and ultrasonically dispersing for 15 minutes to obtain stable solution
S2, preparing component B
Dissolving the curing agent by the mixed solvent at normal temperature and kneading for 30 minutes to obtain stable solution
And S3, uniformly mixing the component A and the component B of the coating according to a proportion, and coating the mixture on the surface of the material.
Compared with the prior art, the invention has the beneficial effects that:
the invention belongs to the technical field of anticorrosive coatings, and particularly discloses an electrostatic shielding graphene anticorrosive material and a preparation method thereof, wherein the electrostatic shielding graphene anticorrosive material has the following advantages:
1. the invention can achieve the anticorrosion effect of two-layer coating of the traditional anticorrosion coating epoxy zinc-rich primer and the micaceous iron intermediate paint recommended in JTT722-2008 technical conditions for anticorrosion coating of steel structures of highway bridges. The neutral salt spray resistance of the single-layer coating (with a dry film thickness of 80 mu m) can reach about 3000h, and greatly exceeds the requirement of the industry standard HG/T3668-2020 of zinc-rich primer of epoxy zinc-rich primer (with a zinc powder content of 80 percent) on the neutral salt spray resistance of 600 h;
2. the invention has low requirement on the treatment of the base material, only needs to be treated to Sa1.0 grade, the paint film can have excellent adhesive force, does not need to be treated to Sa2.5 grade like the requirement of the traditional anticorrosive paint on the base material, and can omit most pretreatment procedures such as sand blasting, ball blasting and the like;
3. the water-based polyurethane finish paint disclosed by the invention is matched with a water-based polyurethane finish paint and is used for coating a steel structure, a paint film has good corrosion resistance and substrate adhesive force, an excellent ultraviolet shielding effect is achieved, the service life of the paint film is prolonged, the VOC (volatile organic compounds) emission in the construction process is greatly reduced, and low-carbon coating is realized.
Drawings
Fig. 1 is a scanning electron microscope picture of a salt spray test for 3000h of the graphene anticorrosive paint prepared in example 1 of the invention;
fig. 2 is a scanning electron microscope picture of the graphene anticorrosive coating prepared in embodiment 2 of the invention after a salt spray test for 3000 h;
FIG. 3 is a scanning electron microscope picture of the graphene anticorrosive coating prepared in comparative example 1 of the invention after salt spray test for 3000 h;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention provides a technical scheme that: the electrostatic shielding graphene anticorrosive material comprises a component A and a component B according to a mass ratio of 10-25: 1:
the component A comprises: 20-50% of epoxy resin, 1-5% of coupling agent, 1-10% of rheological additive, 1-15% of graphene powder, 2-15% of dispersant, 10-55% of zinc powder, 10-15% of filler and 5-25% of mixed solvent;
the component B comprises: 15-45% of curing agent and 55-85% of mixed solvent.
Further, the epoxy resin is selected from any one of a low molecular weight bisphenol a type epoxy resin, a medium molecular weight bisphenol a type epoxy resin, a high molecular weight bisphenol a type epoxy resin, and a novolac epoxy resin.
Further, the coupling agent is selected from one or more of aminopropyltriethoxysilane, aminopropyltrimethoxysilane, 2-aminoethylaminopropyltrimethoxysilane, diethylenetriaminopropyltrimethoxysilane, aminoethylaminopropylmethyldimethoxysilane, aminoethylaminopropyltriethoxysilane, ureidopropyltriethoxysilane and ureidopropyltrimethoxysilane.
Further, the rheological additive is selected from one or more of organic bentonite, polyethylene wax and polyamide wax.
Further, the sheet diameter of the graphene powder is 10-50 μm.
Further, the dispersing agent is one or more of a copolymer solution containing acidic functional groups, a composition of polar acidic ester and high molecular alcohol, and high molecular weight copolymer alkyl ammonium salt.
Further, the filler is one or more of mica iron oxide ash, iron calcium powder, phosphorus titanium powder, phosphorus iron, porous carbon microspheres, Urtica dioica leaf extract or 4(5) -ethylamino imidazole.
Further, the method comprises the following steps:
s1, preparing a component A:
mixing and stirring epoxy resin, rheological additive and mixed solvent at normal temperature to obtain homogeneous liquid, sequentially adding graphene powder, dispersant, zinc powder, filler and coupling agent into the mixed solution, continuously stirring, kneading for 30 minutes after the addition is finished, and ultrasonically dispersing for 15 minutes to obtain stable solution
S2, preparing component B
Dissolving the curing agent by the mixed solvent at normal temperature and kneading for 30 minutes to obtain stable solution
S3, uniformly mixing the component A and the component B of the coating according to the proportion and coating the mixture on the surface of the material.
The working principle is as follows: the invention relates to a preparation method of an electrostatic shielding graphene anticorrosive material,
example 1:
placing porous carbon microspheres and surfactant stearic acid in dispersion liquid of graphene oxide, performing ultrasonic dispersion for 10-30 min, then drying, spraying polyacetylene on the surfaces of the porous microspheres by using a spray dryer, drying to obtain an electrostatic shielding agent, and taking the electrostatic shielding agent as a filler component to be added later;
preparing a component A: uniformly mixing epoxy resin, rheological additive and mixed solvent according to a ratio, adding graphene powder, zinc powder and filler into the mixed solvent, continuously stirring, continuously adding dispersant and coupling agent in the stirring process, stirring for 30 minutes after the addition is finished, and ultrasonically dispersing for 15 minutes through ultrasonic equipment to obtain a stable component A;
preparing a component B: uniformly dissolving the amine curing agent and the mixed solvent, and performing vortex for 30 minutes at normal temperature to obtain a component B of the coating;
mixing the component A and the component B of the coating according to the mass ratio of 10:1, and uniformly stirring to obtain the electrostatic shielding graphene anticorrosive coating;
example 2: example 2 the procedure was the same as in example 1, except for the specific ingredients and amounts used;
the component A comprises epoxy resin, a coupling agent, a rheological aid, graphene powder, a dispersing agent, zinc powder, a filler and a mixed solvent, compared with the filler in the embodiment 1 and the filler in the embodiment 2, 4- (5) -ethylamino imidazole is added into the filler, the proportion of an electrostatic shielding agent is kept unchanged, and the component B comprises a curing agent and the mixed solvent;
4(5) -ethylamino imidazole added can carry out coupling reaction with zinc powder in a neutral environment, and repair the gaps of the coating, so that the anti-corrosion capability of the coating is improved;
example 3: example 3 the procedure was the same as in example 1, except for the specific ingredients and amounts used;
the component A consists of 20% of epoxy resin, 1% of coupling agent, 10% of rheological additive, 10% of graphene powder, 26% of zinc powder, 26% of filler and 7% of mixed additive; the proportions of the components in the component B in the embodiment 3 are the same as those in the embodiment 1, and the component A and the component B of the coating are mixed according to the mass ratio of 10:1 and uniformly stirred to obtain the electrostatic shielding graphene anticorrosive coating;
comparative example 1:
comparative example 1 a graphene anticorrosive coating existing on the market was used;
comparative examples 2 to 3:
the procedure of comparative examples 2 to 3 was the same as in example 1, except for the specific components and the amounts thereof;
wherein comparative example 2 does not contain graphene powder, and comparative example 3 does not contain a filler;
the components and amounts thereof in example 3 and comparative examples 2 to 3 are shown in Table 1
TABLE 1
The anticorrosive coatings prepared in the above examples 1-2 and comparative example 1 are subjected to performance test, GB/T1771-2007 is adopted to test the salt spray resistance, the scanning electron microscope analysis is carried out on the coating corroded by salt spray, the test result is shown in FIGS. 1-3, and after a large amount of implementation of the technical scheme provided by the invention, the salt spray test time is maximally more than 3000 h;
the anticorrosive coatings prepared in the above example 3 and comparative examples 2-3 were subjected to performance tests, the impact strength, hardness and adhesion thereof were tested by visual observation of the appearance and color of the coating film, the salt spray resistance was tested by GB/T1771-2007, and the coating film was subjected to conductivity tests, the test results are shown in Table 2,
TABLE 2
The invention has simple structure and convenient operation, and is suitable for popularization and use.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The electrostatic shielding graphene anticorrosive material is characterized in that: the electrostatic shielding graphene anticorrosive paint is composed of a component A and a component B according to the mass ratio of 10-25: 1:
the component A comprises: 20-50% of epoxy resin, 1-5% of coupling agent, 1-10% of rheological additive, 1-15% of graphene powder, 2-15% of dispersant, 10-55% of zinc powder, 10-15% of filler and 5-25% of mixed solvent;
the component B comprises: 15-45% of curing agent and 55-85% of mixed solvent.
2. The electrostatically shielding graphene anticorrosive material according to claim 1, characterized in that: the epoxy resin is selected from any one of low molecular weight bisphenol A type epoxy resin, medium molecular weight bisphenol A type epoxy resin, high molecular weight bisphenol A type epoxy resin and phenolic aldehyde epoxy resin.
3. The electrostatically shielding graphene anticorrosive material according to claim 1, characterized in that: the coupling agent is one or more selected from aminopropyltriethoxysilane, aminopropyltrimethoxysilane, 2-aminoethylaminopropyltrimethoxysilane, diethylenetriaminopropyltrimethoxysilane, aminoethylaminopropylmethyldimethoxysilane, aminoethylaminopropyltriethoxysilane, ureidopropyltriethoxysilane and ureidopropyltrimethoxysilane.
4. The electrostatically shielding graphene anticorrosive material according to claim 1, characterized in that: the rheological additive is one or more selected from organic bentonite, polyethylene wax and polyamide wax.
5. The electrostatically shielded graphene anticorrosive material of claim 1, wherein: the sheet diameter of the graphene powder is 10-50 μm.
6. The electrostatically shielding graphene anticorrosive material according to claim 1, characterized in that: the dispersing agent is one or more of copolymer solution containing acidic functional groups, a composition of polar acidic ester and high molecular alcohol and high molecular weight copolymer alkyl ammonium salt.
7. The electrostatically shielding graphene anticorrosive material according to claim 1, characterized in that: the filler is one or more of mica iron oxide ash, ferro-calcium powder, phosphorus-titanium powder, ferro-phosphorus, porous carbon microspheres, Urtica dioica leaf extract or 4(5) -ethylamino imidazole.
8. The preparation method of the electrostatic shielding graphene anticorrosive material according to any one of claims 1 to 7, characterized by comprising the following steps: the method comprises the following steps:
s1, preparing a component A:
mixing and stirring epoxy resin, rheological additive and mixed solvent at normal temperature to obtain homogeneous liquid, sequentially adding graphene powder, dispersant, zinc powder, filler and coupling agent into the mixed solution, continuously stirring, kneading for 30 minutes after the addition is finished, and ultrasonically dispersing for 15 minutes to obtain stable solution
S2, preparing component B
Dissolving the curing agent by the mixed solvent at normal temperature and kneading for 30 minutes to obtain stable solution
And S3, uniformly mixing the component A and the component B of the coating according to a proportion, and coating the mixture on the surface of the material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115181445A (en) * | 2022-06-09 | 2022-10-14 | 中建材苏州防水研究院有限公司 | Modified zinc powder suitable for two-component water-based epoxy zinc-rich coating and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111040582A (en) * | 2019-12-31 | 2020-04-21 | 新疆烯金石墨烯科技有限公司 | Graphene anticorrosive paint special for transformer shell and preparation method thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111040582A (en) * | 2019-12-31 | 2020-04-21 | 新疆烯金石墨烯科技有限公司 | Graphene anticorrosive paint special for transformer shell and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115181445A (en) * | 2022-06-09 | 2022-10-14 | 中建材苏州防水研究院有限公司 | Modified zinc powder suitable for two-component water-based epoxy zinc-rich coating and preparation method and application thereof |
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