CN111500148B - Graphene-modified functional heavy-duty water-based paint for steel, and preparation method and application method thereof - Google Patents
Graphene-modified functional heavy-duty water-based paint for steel, and preparation method and application method thereof Download PDFInfo
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- CN111500148B CN111500148B CN202010276891.9A CN202010276891A CN111500148B CN 111500148 B CN111500148 B CN 111500148B CN 202010276891 A CN202010276891 A CN 202010276891A CN 111500148 B CN111500148 B CN 111500148B
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- C09D127/12—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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Abstract
The invention discloses graphene-modified functional heavy-duty anticorrosive water-based paint for steel and a preparation method thereof. The epoxy resin composite primer is composed of water-based epoxy resin, graphene, a dispersing agent, a diluent, an epoxy curing agent and the like, the fluorocarbon composite finish paint is composed of fluorocarbon finish paint, graphene, a dispersing agent, a diluent, an antibacterial agent, a fluorocarbon curing agent and the like, the fluorocarbon metal varnish is composed of fluorocarbon paint, metal powder, a diluent, a fluorocarbon curing agent and the like, the performances of the epoxy resin composite primer, the fluorocarbon composite finish paint and the fluorocarbon metal varnish are mutually supplemented and associated, and the formed heavy anti-corrosion coating improves the corrosion resistance of the base material. The graphene functional coating disclosed by the invention has multiple functions of corrosion resistance, heat conduction, bacteriostasis, flame retardance, oil repellency, hydrophobicity and the like, is wide in application field, simple in preparation method and easy for large-scale production and implementation.
Description
Technical Field
The invention relates to a graphene-modified functional heavy-duty water-based paint for steel, a preparation method and a use method thereof, and belongs to the field of paints.
Background
The metal corrosion wastes resources and energy, and the economic loss caused by the metal corrosion in China is estimated to occupy about 4% of the total production value of China every year, so that the corrosion prevention problem is imminent. However, foreign enterprises account for over 60% of the market share of domestic anticorrosive coatings, and the development of domestic anticorrosive coating technology is to be improved. Especially in the field of heavy duty corrosion protection. The heavy-duty anticorrosive paint is suitable for chemical industry atmosphere and marine environment. However, most of the existing heavy-duty anticorrosive coatings have single functionality, and the chemical atmosphere and marine environment are changeable. Various problems such as bacteria and fire are easy to breed in the changeable environment. Therefore, to protect against various problems, different coatings need to be applied. The mixed use of these different coatings not only consumes manpower and material resources but also reduces the effect thereof, so that the equipment cannot be protected for a long time. In order to achieve comprehensive corrosion resistance of equipment, it is extremely necessary to develop a functional comprehensive heavy-duty composite coating.
Disclosure of Invention
The invention aims to provide a graphene-modified functional heavy-duty anticorrosive water-based paint for steel and a preparation method thereof.
The invention also aims to provide a using method of the functional heavy-duty anticorrosive paint consisting of the epoxy resin composite primer, the fluorocarbon composite finish paint and the fluorocarbon metal varnish.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
the invention provides a graphene-modified functional heavy-duty water-based paint for steel, which consists of an epoxy resin composite primer, a fluorocarbon composite finish and a fluorocarbon metal varnish.
Furthermore, the epoxy resin composite primer is composed of water-based epoxy resin, graphene, a dispersing agent, a diluent, an epoxy curing agent and the like, and the prepared water-based epoxy resin has excellent corrosion resistance and heat conductivity.
Further, the epoxy resin composite primer coating comprises the following components in percentage by weight: 100 parts of epoxy resin, 0.3-1 part of graphene, 0.1-0.2 part of dispersant, 1-10 parts of diluent and 30 parts of epoxy curing agent.
Further, the epoxy resin is a water-based epoxy resin.
Further, the graphene is graphene oxide, and the mass ratio of the graphene to the epoxy resin is 3-10: 1000.
Furthermore, the dispersing agent is polyvinyl alcohol, and the molecular weight of the dispersing agent is 16000-200000. The polyvinyl alcohol and the graphene are functionally modified through pi-pi bonds, so that the formed modified graphene can keep high dispersibility and conductivity in a solvent.
Further, the diluent is water.
Further, the epoxy curing agent is an amine curing agent.
Further, the preparation method of the epoxy resin composite primer coating comprises the following steps: and mixing and stirring 3-10 parts of graphene slurry and a polyvinyl alcohol solution for 24 hours to form a mixture. The mixture was slowly dropped into 1000 parts of an epoxy resin solution, and after stirring for 24 hours, a mixture was formed. And slowly dripping 300 parts of epoxy curing agent into the mixture, and curing for 15 min to form the epoxy resin composite primer coating.
Furthermore, the fluorocarbon composite finish paint is composed of fluorocarbon finish paint, graphene, a dispersing agent, a diluent, an antibacterial agent, a fluorocarbon curing agent and the like, and the prepared fluorocarbon composite finish paint has the performances of corrosion prevention and bacteriostasis.
Further, the fluorocarbon composite finish paint comprises the following components in percentage by weight: 100 parts of fluorocarbon finish, 0.3-0.5 part of graphene, 0.06-0.1 part of dispersing agent, 80-100 parts of diluent, 3-5 parts of antibacterial agent and 20 parts of fluorocarbon curing agent.
Further, the antibacterial agent includes nano titanium dioxide.
Further, the preparation method of the fluorocarbon composite finish paint comprises the following steps: and uniformly mixing the fluorocarbon finish paint and the diluent to form a fluorocarbon diluted mixture for later use. And mixing and stirring 3-5 parts of graphene slurry and a polyvinyl alcohol solution for 24 hours to form a mixture. The mixture was slowly dropped into 1000 parts of the fluorocarbon diluted mixture, and after stirring for 24 hours, a mixture was formed. Then adding a certain amount of antibacterial agent into the mixture and uniformly mixing. And slowly dripping 200 parts of fluorocarbon curing agent into the mixture, and curing for 15 min to form the fluorocarbon composite finish paint.
Furthermore, the fluorocarbon metal varnish consists of fluorocarbon paint, metal powder, a diluent and a fluorocarbon curing agent, and the prepared fluorocarbon composite varnish has the performances of corrosion resistance, flame retardance, oil repellency and hydrophobicity.
Further, the fluorocarbon composite finish paint comprises the following components in percentage by weight: 100 parts of fluorocarbon varnish, 1-3 parts of metal powder, 30-60 parts of diluent and 20 parts of fluorocarbon curing agent.
Further, the metal powder includes two or a mixture of aluminum powder, magnesium hydroxide, and aluminum hydroxide.
Further, the preparation method of the fluorocarbon metal varnish coating comprises the following steps: and (3) uniformly mixing 100 parts of fluorocarbon paint and 30-60 parts of diluent, and sieving with a 200-target cone sieve. And mixing and stirring 1-3 parts of metal powder and fluorocarbon diluted paint for 24 hours to form a mixture. And slowly dripping 20 parts of fluorocarbon curing agent into the mixture, and curing for 15 min to form the fluorocarbon metal varnish coating.
Further, the use method of the functional heavy-duty water-based paint for the graphene-modified steel comprises the following steps: and (4) carrying out surface treatment on the anticorrosive base material, and removing rust and oil. Then spraying the epoxy resin composite primer coating prepared by the method, wherein the thickness of the coating is about 30-50 mu m, and drying for 48 h at room temperature; then spraying the fluorocarbon composite finish paint prepared by the method, wherein the thickness of the coating is about 20-30 mu m, and drying for 48 h at room temperature; and finally, spraying the fluorocarbon varnish paint prepared by the method to obtain a coating with the thickness of about 10-20 microns, and drying for 48 hours to obtain the functional heavy-duty anticorrosive water-based coating for the steel based on graphene modification.
The invention has the beneficial effects that:
(1) the water-based paint and the water-based curing agent are adopted, so that the pollution to the environment is reduced, and the paint belongs to an environment-friendly paint.
(2) Modified graphene is added into the epoxy resin composite primer and the fluorocarbon composite finish paint, so that a labyrinth effect can be formed to prevent the external environment from contacting with equipment.
(3) The functional modification of the pi-pi bonds of the polyvinyl alcohol and the graphene is utilized, the dispersibility of the modified graphene in water is improved, the using amount of the dispersing agent is low, and the modification operation is simple and effective.
(4) The graphene is densely dispersed, so that the anticorrosive effect of the coating is improved, and the coating also has flame-retardant and fireproof performances.
(5) The graphene adopted by the invention is similar to graphene, and has simple preparation process and low cost.
(6) The graphene heavy-duty anticorrosive water-based paint provided by the invention not only keeps the main characteristics of each component, but also improves various performances of the coating through a composite effect, belongs to a comprehensive functional anticorrosive material, and has the advantages of simple preparation, convenience in operation and high applicability.
Drawings
FIG. 1 shows the spraying effect of the functional heavy-duty water-based paint for steel modified by graphene obtained in example 2 of the present invention.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
Example 1:
the invention provides a preparation method of a functional heavy-duty water-based paint for steel based on graphene modification, and aims to overcome the defects in the prior art. The graphene anti-corrosion functional coating is composed of an epoxy resin composite primer, a fluorocarbon composite finish and a fluorocarbon metal varnish.
The technical solution of the present invention is further illustrated and described by the following specific examples.
Example 1:
the embodiment provides a functional heavy-duty water-based paint for steel modified based on 0.3% of graphene and a large-scale preparation method thereof, and the method specifically comprises the following steps:
weighing 100 parts of epoxy resin, 0.3 part of graphene, 0.1 part of dispersant, 3 parts of diluent and 30 parts of epoxy curing agent according to parts by weight.
0.1 part of polyvinyl alcohol dispersant is dissolved in 1 part of diluent, stirred and heated at 90 ℃ until the polyvinyl alcohol is dissolved for later use. Dissolving 0.3 part of graphene in 3 parts of diluent, uniformly dispersing by ultrasonic, adding a polyvinyl alcohol solution, stirring, and performing ultrasonic until the graphene is uniformly dispersed in the diluent. Thus obtaining the modified graphene slurry.
And adding 100 parts of epoxy resin into the graphene slurry in proportion, uniformly mixing the graphene slurry by using a homogenizer, and adding a diluent according to the viscosity degree. Thus obtaining 0.3% graphene epoxy primer slurry which is uniform for later use.
And weighing 30 parts of epoxy curing agent according to a proportion, slowly adding the epoxy curing agent into the formed mixture, curing for 15 min, coating the epoxy curing agent on the treated equipment substrate in a spraying or brushing way, and curing at room temperature to obtain the graphene anticorrosion functional epoxy composite primer coating.
Weighing 100 parts of fluorocarbon finish paint, 0.3 part of graphene, 0.06 part of dispersing agent, 80 parts of diluent, 3 parts of antibacterial agent and 20 parts of fluorocarbon curing agent according to parts by weight.
0.06 part of polyvinyl alcohol dispersant is dissolved in 1 part of diluent, stirred and heated at 90 ℃ until the polyvinyl alcohol is dissolved for later use. Dissolving 0.3 part of graphene in 80 parts of diluent, uniformly dispersing by ultrasonic, adding the polyvinyl alcohol solution, stirring, and performing ultrasonic until the graphene is uniformly dispersed in the diluent. Thus obtaining the modified graphene slurry.
And (3) sieving 100 parts of fluorocarbon finish paint by a standard sieve. Adding 0.3 part of modified graphene slurry and an antibacterial agent, uniformly mixing by using a homogenizer, and adding a diluent according to the viscosity degree. And (5) uniformly preparing for later use.
And weighing 20 parts of fluorocarbon finish curing agent according to a proportion, slowly adding the fluorocarbon finish curing agent into the formed mixture, curing for 15 min, coating the mixture on equipment containing an epoxy composite primer coating by adopting a spraying or brushing mode, and curing at room temperature to obtain the graphene anticorrosion functional fluorocarbon composite finish coating.
Weighing 100 parts of fluorocarbon varnish, 1 part of metal powder, 30 parts of diluent and 20 parts of fluorocarbon curing agent according to parts by weight.
100 parts of fluorocarbon varnish are sieved through a standard sieve. Mixing 1 part of metal powder and fluorocarbon paint, uniformly mixing the metal powder and the fluorocarbon paint by using a homogenizer, and adding 30 parts of diluent according to the viscosity degree of the metal powder and the fluorocarbon paint. And (5) uniformly preparing for later use.
And (2) weighing 20 parts of fluorocarbon varnish curing agent according to the proportion, slowly adding the fluorocarbon varnish curing agent into the formed mixture, curing for 15 min, coating the mixture on equipment containing the epoxy composite primer and the fluorocarbon composite finish paint in a spraying or brushing way, and curing at room temperature to obtain the graphene anticorrosion functional coating.
In the present invention, 1 part represents 1 g.
Example 2:
the embodiment 2 provides a functional heavy-duty water-based paint for steel modified based on 0.5% of graphene and a large-scale preparation method thereof, and specifically comprises the following steps:
weighing 100 parts of epoxy resin, 0.5 part of graphene, 0.2 part of dispersant, 5 parts of diluent and 30 parts of epoxy curing agent according to parts by weight.
0.2 part of polyvinyl alcohol dispersant is dissolved in a certain amount of diluent, stirred and heated at 90 ℃ until the polyvinyl alcohol is dissolved for later use. Dissolving 0.5 part of graphene in 5 parts of diluent, uniformly dispersing by ultrasonic, adding 0.2 part of polyvinyl alcohol solution, stirring, and performing ultrasonic until the graphene is uniformly dispersed in the diluent. Thus obtaining the modified graphene slurry.
And adding 0.5 part of modified graphene slurry into 100 parts of epoxy resin according to a proportion, uniformly mixing the modified graphene slurry by using a homogenizer, and adding a diluent according to the viscosity degree. And (5) uniformly preparing for later use.
And weighing 30 parts of epoxy curing agent according to the proportion, slowly adding the epoxy curing agent into the mixture, and curing for 15 min to obtain the epoxy resin primer coating. The graphene anticorrosion functionalized epoxy composite primer coating can be coated on a treated equipment substrate in a spraying or brushing way and can be obtained by curing at room temperature.
Weighing 100 parts of fluorocarbon finish paint, 0.4 part of graphene, 0.08 part of dispersing agent, 90 parts of diluent, 4 parts of antibacterial agent and 20 parts of fluorocarbon curing agent according to parts by weight.
0.08 part of polyvinyl alcohol dispersant is dissolved in 1 part of diluent, stirred and heated at 90 ℃ until the polyvinyl alcohol is dissolved for later use. Dissolving 0.4 part of graphene in 90 parts of diluent, uniformly dispersing by ultrasonic, adding 0.08 part of polyvinyl alcohol solution, stirring, and performing ultrasonic until the graphene is uniformly dispersed in the diluent. Thus obtaining the modified graphene slurry.
And (3) sieving 100 parts of fluorocarbon coating through a standard sieve. Adding the modified graphene slurry and the antibacterial agent according to a certain proportion, uniformly mixing the modified graphene slurry and the antibacterial agent by using a homogenizer, and adding the diluent according to the viscosity degree. And (5) uniformly preparing for later use.
And weighing 20 parts of fluorocarbon curing agent according to the proportion, slowly adding the fluorocarbon curing agent into the formed mixture, curing for 15 min, coating the mixture on equipment containing the epoxy composite primer coating by adopting a spraying or brushing mode, and curing at room temperature to obtain the graphene anticorrosion functional fluorocarbon composite finish coating.
Weighing 100 parts of fluorocarbon varnish, 2 parts of metal powder, 45 parts of diluent and 20 parts of fluorocarbon curing agent according to parts by weight.
And (3) sieving 100 parts of fluorocarbon coating through a standard sieve. Mixing 2 parts of metal powder and fluorocarbon paint, uniformly mixing the metal powder and the fluorocarbon paint by using a homogenizer, and adding a diluent according to the viscosity degree of the metal powder. And (5) uniformly preparing for later use.
And (2) weighing 20 parts of fluorocarbon curing agent according to a proportion, slowly adding the fluorocarbon curing agent into the formed mixture, curing for 15 min, coating the mixture on equipment containing the epoxy composite primer and the fluorocarbon composite finish paint in a spraying or brushing way, and curing at room temperature to obtain the graphene anticorrosion functional coating.
Test items and test results of example 2
TABLE 1
Example 3:
the embodiment 3 provides a functional heavy-duty water-based paint for steel modified based on 1% of graphene and a large-scale preparation method thereof, and specifically comprises the following steps:
weighing 100 parts of epoxy resin, 1 part of graphene, 0.3 part of dispersant, 10 parts of diluent and 30 parts of epoxy curing agent according to parts by weight.
0.3 part of polyvinyl alcohol dispersant is dissolved in a certain amount of diluent, stirred and heated at 90 ℃ until the polyvinyl alcohol is dissolved for later use. Dissolving 1 part of graphene in 10 parts of diluent, uniformly dispersing by ultrasonic, adding 0.3 part of polyvinyl alcohol solution, stirring, and performing ultrasonic until the graphene is uniformly dispersed in the diluent. Thus obtaining the modified graphene slurry.
And adding 100 parts of epoxy resin into the modified graphene slurry in proportion, uniformly mixing the modified graphene slurry by using a homogenizer, and adding a diluent according to the viscosity degree. And (5) uniformly preparing for later use.
And weighing 30 parts of epoxy curing agent according to a proportion, slowly adding the epoxy curing agent into the formed mixture, curing for 15 min, coating the epoxy curing agent on the treated equipment substrate in a spraying or brushing way, and curing at room temperature to obtain the graphene anticorrosion functional epoxy composite primer coating.
Weighing 100 parts of fluorocarbon finish paint, 0.5 part of graphene, 0.1 part of dispersing agent, 100 parts of diluent, 5 parts of antibacterial agent and 20 parts of fluorocarbon curing agent according to parts by weight.
0.1 part of polyvinyl alcohol dispersant is dissolved in a certain amount of diluent, stirred and heated at 90 ℃ until the polyvinyl alcohol is dissolved for later use. Dissolving 0.5 part of graphene in 100 parts of diluent, uniformly dispersing by ultrasonic, adding 0.1 part of polyvinyl alcohol solution, stirring, and performing ultrasonic until the graphene is uniformly dispersed in the diluent. Thus obtaining the modified graphene slurry.
And (3) sieving 100 parts of fluorocarbon coating through a standard sieve. Adding the modified graphene slurry and the antibacterial agent according to a certain proportion, uniformly mixing the modified graphene slurry and the antibacterial agent by using a homogenizer, and adding the diluent according to the viscosity degree. And (5) uniformly preparing for later use.
And weighing 20 parts of fluorocarbon curing agent according to the proportion, slowly adding the fluorocarbon curing agent into the formed mixture, curing for 15 min, coating the mixture on equipment containing the epoxy composite primer coating by adopting a spraying or brushing mode, and curing at room temperature to obtain the graphene anticorrosion functional fluorocarbon composite finish coating.
Weighing 100 parts of fluorocarbon varnish, 3 parts of metal powder, 60 parts of diluent and 20 parts of fluorocarbon curing agent according to parts by weight.
And (3) sieving 100 parts of fluorocarbon coating through a standard sieve. Mixing 3 parts of metal powder and fluorocarbon paint, uniformly mixing the metal powder and the fluorocarbon paint by using a homogenizer, and adding a diluent according to the viscosity degree of the metal powder. And (5) uniformly preparing for later use.
And (2) weighing 20 parts of fluorocarbon curing agent according to a proportion, slowly adding the fluorocarbon curing agent into the formed mixture, curing for 15 min, coating the mixture on equipment containing the epoxy composite primer and the fluorocarbon composite finish paint in a spraying or brushing way, and curing at room temperature to obtain the graphene anticorrosion functional coating.
Comparative example 1: basically the same as the example 1, but the modified graphene is not added in the epoxy composite primer and the fluorocarbon composite finishing coat.
According to the preparation method of the embodiment 1, the non-modified graphene epoxy composite primer, the non-modified graphene fluorocarbon composite finish paint and the fluorocarbon metal varnish are sequentially coated on stainless steel with the thickness of 300 mm multiplied by 300 mm, and the coating thickness is more than or equal to 5 mm. The thermal conductivity coefficient test is carried out according to the following table 1, and the result shows that: the thermal conductivity of the functional coating containing graphene is much greater than that of the coating without graphene. The experiment is carried out on each single coating of the example and the comparative example 1 respectively by adopting a Baige method, and the result shows that each single coating of the comparative example 1 can reach 0 grade, the examples 1 and 2 can also reach 0 grade, and the example 3 can reach 1 grade.
Comparative example 2: basically the same as the example 1, but the fluorocarbon composite finishing coat is not added with the modified graphene.
According to the preparation method of the embodiment 1, the modified graphene epoxy composite primer, the unmodified graphene fluorocarbon composite finish paint and the fluorocarbon metal varnish are sequentially coated on stainless steel with the thickness of 300 mm multiplied by 300 mm, and the coating thickness is more than or equal to 5 mm. The thermal conductivity coefficient test is carried out according to the following table 1, and the result shows that: the thermal conductivity of the functional coating containing graphene is greater than that of the coating not containing graphene. The experiment is sequentially carried out on each single coating in the embodiment and the comparative example 2 by adopting a Baige method, and the result shows that the unmodified graphene fluorocarbon composite finish coating in the comparative example 2 can reach 0 grade, and the modified graphene epoxy composite primer coating can reach 1 grade. The embodiment 1 and the embodiment 2 can reach the 0 level, and the embodiment 3 can reach the 1 level.
Comparative example 3: basically the same as example 1, but no modified graphene was added to the epoxy composite primer.
According to the preparation method of the embodiment 1, the non-modified graphene epoxy composite primer, the modified graphene fluorocarbon composite finish paint and the fluorocarbon metal varnish are sequentially coated on stainless steel with the thickness of 300 mm multiplied by 300 mm, and the coating thickness is more than or equal to 5 mm. The thermal conductivity coefficient test is carried out according to the following table 1, and the result shows that: the thermal conductivity of the functional coating containing graphene is greater than that of the coating not containing graphene. The experiment is sequentially carried out on each single coating in the embodiment and the comparative example 3 by adopting a Baige method, and the result shows that the non-modified graphene epoxy composite primer coating in the comparative example 3 can reach the 0 level, and the modified graphene fluorocarbon composite finish coating can reach the 1 level. The example 1 and the example 2 can reach the 0 grade, and the example 3 can reach the 1 grade.
Comparative example 4: the coating preparation process was similar to example 2. The graphene is directly dispersed without modification. Compared with the embodiment, the method of the comparative example 4 is easy to cause graphene agglomeration, and the salt spray resistance experiment is used for comparison, the result shows that the phenomena of bubbling, rusty spot and the like appear in the salt spray resistance time of the comparative example 4 only within 200 hours, and the salt spray resistance effect of the embodiment is good, wherein the salt spray resistance experiment of the embodiment 2 can reach more than 1000 hours.
Claims (5)
1. The functional heavy-duty anticorrosive water-based paint based on graphene modification for steel is characterized by comprising the following components in parts by weight: the heavy-duty anticorrosive water-based paint consists of an epoxy resin composite primer, a fluorocarbon composite finish and a fluorocarbon metal varnish;
the epoxy resin composite primer is composed of water-based epoxy resin, graphene, a dispersing agent, a diluent and an epoxy curing agent, and the prepared water-based epoxy resin has excellent corrosion resistance and heat conductivity; the epoxy resin composite primer coating comprises the following components in parts by weight: 100 parts of water-based epoxy resin, 0.3-1 part of graphene, 0.1-0.2 part of dispersant, 1-10 parts of diluent and 30 parts of epoxy curing agent;
the fluorocarbon composite finish paint consists of fluorocarbon finish paint, graphene, a dispersing agent, a diluent, an antibacterial agent and a fluorocarbon curing agent, and the prepared fluorocarbon composite finish paint has the performances of corrosion prevention and bacteriostasis; the fluorocarbon composite finish paint comprises the following components in parts by weight: 100 parts of fluorocarbon finish, 0.3-0.5 part of graphene, 0.06-0.1 part of dispersant, 80-100 parts of diluent, 3-5 parts of antibacterial agent and 20 parts of fluorocarbon curing agent;
the fluorocarbon metal varnish consists of fluorocarbon paint, metal powder, a diluent and a fluorocarbon curing agent, and the prepared fluorocarbon composite varnish has the performances of corrosion resistance, flame retardance, oil repellency and hydrophobicity; the fluorocarbon composite clear coating comprises the following components in percentage by weight: 100 parts of fluorocarbon varnish, 1-3 parts of metal powder, 30-60 parts of diluent and 20 parts of fluorocarbon curing agent;
the use method of the functional heavy-duty water-based paint for the steel based on graphene modification comprises the following steps: performing surface treatment on the anticorrosive base material, and removing rust and oil; then spraying the epoxy resin composite primer coating, wherein the thickness of the coating is 30-50 mu m, and drying at room temperature for 48 h; then spraying the fluorocarbon composite finish paint, wherein the thickness of the coating is 20-30 mu m, and drying for 48 h at room temperature; and finally, spraying the fluorocarbon varnish coating, wherein the thickness of the coating is 10-20 microns, and drying for 48 hours to obtain the functional heavy-duty anticorrosive water-based coating for the steel based on graphene modification.
2. The graphene-modified functional heavy-duty water-based paint for steel products according to claim 1, wherein: in the epoxy resin composite primer, graphene is graphene oxide, and the mass ratio of the graphene to the water-based epoxy resin is 3-10: 1000;
the dispersing agent is polyvinyl alcohol, and the molecular weight of the dispersing agent is 16000-200000;
the diluent is water;
the epoxy curing agent is an amine curing agent;
the amine curing agent comprises a polyamide curing agent.
3. The graphene-modified functional heavy-duty water-based paint for steel products according to claim 1, wherein: in the fluorocarbon composite finish paint, graphene is graphene oxide, a dispersing agent is polyvinyl alcohol, and the molecular weight of the dispersing agent is 16000-200000; the diluent is water; the antibacterial agent comprises nano titanium dioxide; the fluorocarbon curing agent is a water-based isocyanate curing agent.
4. The graphene-modified functional heavy-duty water-based paint for steel products according to claim 1, wherein: in the fluorocarbon metal varnish, the metal powder comprises aluminum powder; the fluorocarbon curing agent is a water-based isocyanate curing agent.
5. The preparation method of the functional heavy-duty water-based paint for graphene-modified steel products, which is based on any one of claims 1 to 4, is characterized by comprising the following steps:
the preparation method of the epoxy resin composite primer coating comprises the following steps: mixing and stirring 3-10 parts of graphene slurry and 1-2 parts of polyvinyl alcohol solution for 24 hours to form a mixture; slowly dropping the mixture into 1000 parts of epoxy resin solution, and stirring for 24 hours to form a mixture; slowly dripping 300 parts of epoxy curing agent into the mixture, curing for 15 min to form the epoxy resin composite primer coating;
the preparation method of the fluorocarbon composite finish paint comprises the following steps: uniformly mixing the fluorocarbon finish paint and a diluent to form a fluorocarbon diluted mixture for later use; mixing and stirring 3-5 parts of graphene slurry and a polyvinyl alcohol solution for 24 hours to form a mixture; slowly dripping the mixture into 1000 parts of fluorocarbon diluted mixture, and stirring for 24 hours to form a mixture; then adding 30-50 parts of an antibacterial agent into the mixture and uniformly mixing; slowly dripping 200 parts of fluorocarbon curing agent into the mixture, curing for 15 min to form fluorocarbon composite finish paint;
the preparation method of the fluorocarbon metal varnish coating comprises the following steps: uniformly mixing 100 parts of fluorocarbon paint and 30-60 parts of diluent, and sieving with a 200-target cone sieve; mixing and stirring 1-3 parts of metal powder and fluorocarbon diluted paint for 24 hours to form a mixture; and slowly dripping 20 parts of fluorocarbon curing agent into the mixture, and curing for 15 min to form the fluorocarbon metal varnish coating.
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| TWI775318B (en) * | 2021-02-19 | 2022-08-21 | 勝一化工股份有限公司 | Composite coating system |
| CN114891418B (en) * | 2022-05-18 | 2023-05-09 | 安徽凤凰涂料科技有限公司 | Antistatic graphene coating and application method thereof |
| CN115975442A (en) * | 2022-12-16 | 2023-04-18 | 哈尔滨端赛科技有限公司 | TiO 2 2 Graphene water-based fluorocarbon paint and preparation method thereof |
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