CN111057421A - Graphene metal anticorrosive paint for primary equipment in coastal region and preparation method - Google Patents
Graphene metal anticorrosive paint for primary equipment in coastal region and preparation method Download PDFInfo
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- CN111057421A CN111057421A CN201911142763.9A CN201911142763A CN111057421A CN 111057421 A CN111057421 A CN 111057421A CN 201911142763 A CN201911142763 A CN 201911142763A CN 111057421 A CN111057421 A CN 111057421A
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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
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—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
- 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
- C09D127/16—Homopolymers or copolymers of vinylidene fluoride
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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
- C09D5/08—Anti-corrosive paints
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Abstract
The invention discloses a graphene metal anticorrosive paint for primary equipment in coastal areas and a preparation method thereof, wherein the paint comprises the following components in parts by weight: 50-100 parts of polyvinylidene fluoride, 0.1-1 part of benzoyl hydrazine modified graphene oxide powder, 3-7 parts of a dispersing agent, 2-6 parts of a leveling agent, 5-15 parts of a curing agent, 10-20 parts of a diluent, 1-10 parts of a functional filler and 15-20 parts of a mixed solvent, wherein the preparation method of the benzoyl hydrazine modified graphene oxide powder comprises the following steps: (1) dispersing graphene oxide in a solvent, adding benzoyl hydrazine, performing ultrasonic treatment and separation to obtain a benzoyl hydrazine modified graphene oxide crude product, wherein the molar ratio of the graphene oxide to the benzoyl hydrazine is 1: 1-5; (2) and (2) purifying the modified graphene oxide crude product obtained in the step (1) to obtain benzoyl hydrazine modified graphene oxide. The modified graphene oxide is easier to adsorb on the metal surface, the adhesiveness of the coating is improved, water molecules and corrosive ion diffusion can be effectively blocked, and the corrosion prevention effect is improved.
Description
Technical Field
The invention belongs to the technical field of corrosion prevention of primary electric power equipment, and particularly relates to a graphene metal anticorrosive paint.
Background
With the large-scale construction of power grids in China, transformer substations emerge continuously like bamboo shoots in spring after rain, however, the corrosion problem of power grid equipment is one of the important reasons for influencing the service life of the equipment and causing the failure of the equipment and the structure. The power grid project has wide coverage area and complex and various natural environments, wherein the problem of metal corrosion prevention of primary equipment in coastal areas also emerges from the water surface. The most effective and direct method for preventing corrosion is to coat anticorrosive paint on the surface of metal to prevent or slow down the corrosion of metal. The common anticorrosive paint mainly comprises polyvinylidene fluoride paint, red lead antirust paint, alkyd resin paint, epoxy resin paint, polyurethane paint and the like.
Polyvinylidene Fluoride (PVDF) is a semi-crystalline polymer, the crystal structure and crystallinity of the PVDF polymer obtained under different synthesis conditions and processing conditions are different, the common crystal structure mainly comprises α, β, gamma and delta four crystal forms, the various crystal forms enable the PVDF to have excellent piezoelectricity, focus, ferroelectricity, high mechanical property, high insulating property and impact resistance, and the application is very wide.
Graphene (G) is a very important low-dimensional carbon member, and is a cellular planar thin film formed by carbon atoms in an sp2 hybridization manner, and is the thinnest two-dimensional material known in the world at present. Researches show that the nano-material has peculiar and excellent performances in the aspects of mechanics, electricity, heat, magnetism and the like, and the unique nano-structure of the nano-material enables the nano-material to be expected to be widely applied in the fields of high-performance electronic devices, composite materials, biological materials, gas sensors and the like. Meanwhile, the method has great potential in the field of corrosion prevention of metal materials: firstly, a physical barrier layer can be formed between metal and an active medium due to a stable sp2 hybrid structure of graphene, so that diffusion and permeation are prevented; secondly, the graphene has good thermal stability and chemical stability, and in addition, good electric conductivity and heat conductivity of the graphene provide favorable conditions for the metal service environment; simultaneously, the high-strength high-friction material has high strength and good tribological performance. The coating has the advantages of improving the conductivity or the salt spray resistance, further reducing the thickness of the coating, increasing the adhesive force to a base material and improving the wear resistance of the coating.
However, in the graphene anticorrosive paint prepared in the prior art, due to the lack of active functional groups on the surface of graphene and the large specific surface area, the interface bonding strength between the graphene and a polymer matrix is low, the graphene is easy to agglomerate, the uniformity of graphene particles in the paint is reduced after the graphene is agglomerated, the paint is non-uniform in electric conduction after being coated on the metal surface, the protection capability on metal is weak, and the blocking effect cannot be formed in a place with less local graphene.
Disclosure of Invention
The invention aims to solve the technical problem of providing a modified graphene oxide metal anticorrosive coating for primary equipment in coastal areas, which can effectively block diffusion of water molecules and corrosive ions and improve the anticorrosive effect.
In order to solve the technical problems, the invention adopts the following technical scheme: a modified graphene oxide metal anticorrosive paint for primary equipment in coastal areas comprises the following components in parts by weight: 50-100 parts of polyvinylidene fluoride, 0.1-1 part of benzoyl hydrazine modified graphene oxide powder, 3-7 parts of a dispersing agent, 2-6 parts of a leveling agent, 5-15 parts of a curing agent, 10-20 parts of a diluent, 1-10 parts of a functional filler and 15-20 parts of a mixed solvent.
Preferably, the preparation method of the benzoyl hydrazine modified graphene oxide powder comprises the following steps:
(1) dispersing graphene oxide in a solvent, adding benzoyl hydrazine, performing ultrasonic treatment and separation to obtain a benzoyl hydrazine modified graphene oxide crude product, wherein the molar ratio of the graphene oxide to the benzoyl hydrazine is 1: 1-5;
(2) and (2) purifying the modified graphene oxide crude product obtained in the step (1) to obtain benzoyl hydrazine modified graphene oxide.
Preferably, the polyvinylidene fluoride is PVDF T-1 or PVDF2801 with a Molecular Weight (MW) in the range of 35 to 50 ten thousand.
Preferably, the functional filler is one or a mixture of more than two of bentonite, silicon dioxide, titanium dioxide and barium sulfate.
Preferably, the mixed solvent is a mixture of two or more of DMF, acetone, xylene, ethanol, and butyl ester.
Preferably, the dispersant is a silane coupling agent KH550 or KH 570.
Preferably, isophorone or diacetone alcohol is used as the leveling agent.
Preferably, the curing agent uses HDI biuret, HDI trimer or IPDI isophoronediamine.
Preferably, the composition comprises the following components in parts by weight: 70 parts of polyvinylidene fluoride, 0.5 part of benzoyl hydrazine modified graphene oxide powder, 5 parts of a dispersing agent, 4 parts of a flatting agent, 10 parts of a curing agent, 15 parts of a diluent, 5 parts of a functional filler and 18 parts of a mixed solvent.
The invention also provides a preparation method of the modified graphene oxide metal anticorrosive paint for the primary equipment in the coastal region, which comprises the following steps:
step S1, uniformly mixing polyvinylidene fluoride and the mixed solvent by using a high-speed stirrer, and adding the mixture into a paint mixing tank;
step S2, starting the high-speed stirrer, sequentially adding the dispersing agent, the leveling agent and the functional filler, and uniformly stirring;
step S3, after stirring uniformly, grinding the fineness of the paint paste to be below 30 mu m by a three-roll grinder, and then placing the paint paste in a paint mixing tank;
step S4, starting a high-speed stirrer, adding benzoyl hydrazine modified graphene oxide powder, and stirring at a high speed of 3000r/min for 1 h;
and step S5, filtering with a 90-110 mesh filter screen, adding a curing agent and a diluent into the filtered solution, and uniformly mixing to obtain the benzoyl hydrazine modified graphene oxide metal anticorrosive paint.
By adopting the technical scheme, the invention has the following beneficial effects:
the modified graphene oxide with the modified surface is used as an anticorrosive material and added into a common polyvinylidene fluoride anticorrosive coating to prepare a novel metal anticorrosive coating, the interaction between the modified graphene oxide surface functional group and the polymer matrix molecule is utilized to form effective interface combination between the modified graphene oxide surface functional group and the polymer matrix, the uniform dispersion effect is achieved in the matrix, the modified graphene oxide is more easily adsorbed on the metal surface, the adhesiveness of the coating is improved, water molecules and corrosive ion diffusion can be effectively blocked, and the anticorrosive effect is improved.
The following detailed description will explain the present invention and its advantages.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A modified graphene oxide metal anticorrosive paint for primary equipment in coastal areas comprises the following components in parts by weight: 50-100 parts of polyvinylidene fluoride, 0.1-1 part of benzoyl hydrazine modified graphene oxide powder, 3-7 parts of a dispersing agent, 2-6 parts of a leveling agent, 5-15 parts of a curing agent, 10-20 parts of a diluent, 1-10 parts of a functional filler and 15-20 parts of a mixed solvent.
Wherein, the polyvinylidene fluoride resin can select PVDF T-1, PVDF2801 and the like with the Molecular Weight (MW) range of 35-50 ten thousand; as the dispersant, silane coupling agents KH550, KH570 and the like; as the leveling agent, isophorone, diacetone alcohol, etc. can be used; as the curing agent, HDI biuret, HDI trimer, IPDI isophoronediamine, etc. can be used.
The functional filler is one or a mixture of more of bentonite, silicon dioxide, titanium dioxide and barium sulfate; the mixed solvent can be a mixture of more than two of DMF, acetone, xylene, alcohols (ethanol) and esters (butyl ester).
Specific example 1
Comprises the following components in parts by weight: 70 parts of polyvinylidene fluoride, 0.5 part of benzoyl hydrazine modified graphene oxide powder, 5 parts of a dispersing agent, 4 parts of a flatting agent, 10 parts of a curing agent, 15 parts of a diluent, 5 parts of a functional filler and 18 parts of a mixed solvent.
Specific example 2
Comprises the following components in parts by weight: 80 parts of polyvinylidene fluoride, 0.4 part of benzoyl hydrazine modified graphene oxide powder, 4 parts of a dispersing agent, 5 parts of a flatting agent, 5 parts of a curing agent, 10 parts of a diluent, 8 parts of a functional filler and 15 parts of a mixed solvent.
Specific example 3
Comprises the following components in parts by weight: 90 parts of polyvinylidene fluoride, 0.8 part of benzoyl hydrazine modified graphene oxide powder, 7 parts of a dispersing agent, 5 parts of a flatting agent, 7 parts of a curing agent, 13 parts of a diluent, 9 parts of a functional filler and 16 parts of a mixed solvent.
A preparation method of a modified graphene oxide metal anticorrosive paint for primary equipment in coastal areas comprises the following steps:
step S1, uniformly mixing 50-100 parts of polyvinylidene fluoride and 15-20 parts of mixed solvent by using a high-speed stirrer, and adding the mixture into a paint mixing tank;
step S2, starting a high-speed stirrer, sequentially adding 3-7 parts of dispersing agent, 2-6 parts of flatting agent and 1-10 parts of functional filler, and uniformly stirring;
step S3, after stirring uniformly, grinding the fineness of the paint paste to be below 30 mu m by a three-roll grinder, and then placing the paint paste in a paint mixing tank;
step S4, starting a high-speed stirrer, adding 0.1-1 part of benzoyl hydrazine modified graphene oxide powder, and stirring at a high speed of 3000r/min for 1 h;
and step S5, filtering with a 90-110 mesh filter screen, adding 5-15 parts of curing agent and 10-20 parts of diluent into the filtered solution, and uniformly mixing to obtain the benzoyl hydrazine modified graphene oxide metal anticorrosive paint.
The graphene oxide modification method comprises the following steps:
(1) dispersing graphene oxide in a solvent, adding benzoyl hydrazine, performing ultrasonic treatment and separation to obtain a benzoyl hydrazine modified graphene oxide crude product, wherein the molar ratio of the graphene oxide to the benzoyl hydrazine is 1: 1-5; the ultrasonic treatment time is 1-3 h each time; the structural general formula of the benzoyl hydrazine is shown as the following formula:
wherein R1 and R2 are selected from any one of alkyl, alkenyl, aryl or H with a linear or branched structure and an open chain or cyclic structure, and can be the same or different. The benzoyl hydrazine comprises at least one compound with the general structure.
(2) And (2) purifying the modified graphene oxide crude product obtained in the step (1) to obtain benzoyl hydrazine modified graphene oxide.
Due to the fact that the surface of the graphene lacks active functional groups and is large in specific surface area, the graphene and the polymer matrix are low in interface bonding strength and easy to agglomerate. Carrying out surface modification on graphene, and forming effective interface combination between the graphene and a polymer matrix by utilizing the interaction between surface functional groups of the graphene and polymer matrix molecules, so as to achieve the effect of uniform dispersion in the matrix; the graphene or the derivative thereof can be loaded on other materials through different methods, so that the physical and chemical properties of the materials can be changed. Certainly, the graphene is a nano material, the graphene can only act when the addition amount of the graphene is proper, the use amount is too small, and the graphene cannot form a barrier effect in the coating; the excessive consumption can cause the aggregation of graphene, generate defects and reduce the corrosion resistance of the coating.
Graphene Oxide (GO) is an oxide of graphene, and is generally obtained by oxidizing graphite with strong acid, for example, Hummers method is the most common method for preparing GO at present, and the preparation process has relatively good timeliness and is relatively safe. The method comprises the steps of carrying out oxidation reaction on potassium permanganate in concentrated sulfuric acid and graphite powder to obtain brown graphite flakes with derived carboxylic acid groups on the edges and mainly phenolic hydroxyl groups and epoxy groups on the surfaces, and carrying out ultrasonic or high-shear intense stirring and stripping on graphite flake layers to obtain graphene oxide, wherein a stable light brown single-layer graphene oxide suspension is formed in water. The graphite oxide still maintains the layered structure of graphite, but a plurality of oxygen-based functional groups (such as-COOH, -OH, epoxy groups and the like) are introduced on the graphene single sheet of each layer, and the active oxygen-based functional groups can increase the compatibility and the dispersing capacity of the graphene with polyvinylidene fluoride.
Graphene oxide is a compound formed by sp from carbon atoms2The hybrid tracks form a hexagonal honeycomb lattice two-dimensional carbon nanomaterial. Carbon atoms in each six-membered ringsp2The hybrid orbital forms a carbon-carbon sigma bond with the sp2 hybrid orbital of a carbon atom on an adjacent six-membered ring in the direction of maximum overlap. The symmetry axes of 3 sp2 hybridization orbitals of each carbon atom are distributed on the same plane, the included angle is 120 degrees, and a regular hexagonal carbon skeleton is formed; in addition, each carbon atom has an unhybridized P orbital perpendicular to this plane, which are parallel to each other and overlap laterally to form a large, highly delocalized pi bond. The benzene ring also has a structure of regular hexagonal conjugated delocalized large pi bonds, and the pi electrons can be combined with other compounds containing the pi electrons through pi-pi noncovalent bond action, so that the surface of the graphene oxide has strong adsorption effect on aromatic compounds containing the benzene ring. Therefore, a benzene ring of the benzoyl hydrazine has strong pi bond interaction with the graphene oxide, so that the benzoyl hydrazine is promoted to be combined with the graphene oxide, and particularly R1 or R2 is an aromatic compound.
Benzoyl Hydrazine (BH) is an organic compound containing hydrazide characteristic groups (CONHN) and can be used as an additive for resisting fatigue, wear and extreme pressure characteristics. A large number of tribology experiment results show that the existence of the benzoyl hydrazine substances can not only reduce the friction coefficient of the material, but also reduce the abrasion of the material. After the graphene oxide is modified by the benzoyl hydrazine, effective interface combination is formed between the graphene oxide and the PVDF polymer matrix, and the effect of uniform dispersion in the matrix is achieved; meanwhile, water molecules and corrosive ion diffusion can be effectively blocked after modification, and the wear-resistant and corrosion-resistant effects are improved. The modified graphene oxide in the coating disclosed by the invention is small in use amount, and has the characteristics of good toughness, strong adhesive force, good water resistance, good corrosion resistance and the like.
The common corrosion resistance measuring methods are generally a neutral salt spray resistance measuring method and a copper-accelerated acetate spray test method, which are time-consuming and require specially manufactured spraying equipment to be further improved. The metal corrosion prevention of the coastal primary equipment faces a severe environment, and the test method of the corrosion prevention performance of the coastal primary equipment is improved. The corrosion resistance of the coating is tested by using the following method, which comprises the following steps:
(1) preparation of a solution for soaking: dissolving sodium chloride in distilled water to obtain a colorless solution, wherein the concentration of the colorless solution is 45-55 g/L, and the pH value of the prepared solution is 6.0-7.0; adding a sufficient amount of copper dichloride into the salt solution to enable the concentration of the copper dichloride to be 0.25-0.30 g/L; and sufficient glacial acetic acid is added into the salt solution to ensure that the pH value of the prepared solution is 3.0-3.1.
(2) During measurement, the prepared coating is coated on the surface of the tinplate and is placed at room temperature for 3-7 days. Preparing a sample plate, completely soaking the sample plate below the liquid level of the test solution, and regularly sampling and observing. And after the test is finished, taking out the sample, and drying for 0.5-1 h before cleaning. And (3) slightly cleaning or soaking the test piece in clean flowing water with the temperature not exceeding 25-40 ℃, immediately drying the test piece, and observing the corrosion morphology.
Example one
(1) Dispersing graphene oxide in a solvent, adding benzoyl hydrazine, carrying out ultrasonic treatment for 2 hours, and separating to obtain benzoyl hydrazine modified graphene oxide, wherein the molar ratio of the graphene oxide to the benzoyl hydrazine is 1: 3;
(2) purifying the modified graphene oxide product obtained in the step (1) to obtain benzoyl hydrazine modified graphene oxide;
(3) uniformly mixing 80 parts of PVDF and 18 parts of mixed solvent (xylene/acetone/DMF in a volume ratio of 3/3/1) by mass with a high-speed stirrer, adding the mixture into a paint mixing tank, starting the high-speed stirrer, sequentially adding 5 parts of KH550 silane coupling agent, 4 parts of leveling agent isophorone and 5 parts of bentonite, uniformly stirring, and grinding the fineness of the paint paste to below 30 mu m by using a three-roll grinder;
(4) then placing the mixture in a paint mixing tank; starting a high-speed stirrer, adding 0.5 part of benzoyl hydrazine modified graphene oxide, stirring and grinding for 1 hour at a high speed (3000r/min), complementing a solvent to adjust to the solid content of the original formula, filtering by using a 100-mesh filter screen, adding 10 parts of a curing agent and 15 parts of a diluent into the solution, and uniformly mixing to obtain the benzoyl hydrazine modified graphene oxide metal anticorrosive paint.
The nonvolatile content was measured according to the regulations GB/T1725-2007, the fineness was measured according to the regulations GB/T1724-1979, and the drying time was measured according to the regulations GB/T1728-1979. And coating the prepared coating on the surface of the tinplate, and standing at room temperature for 3 days to prepare a sample plate for later use. The appearance of the coating film was visually observed under scattered sunlight, and the water resistance test was carried out according to the regulation of the A method of GB/T1733-1933, the acid resistance test was carried out according to the regulation of the immersion method of GB/T9274-1988, and the salt spray resistance test was carried out according to the regulation of GB/T1771-2007, and the immersion method test methods were as described above. Table 1 shows the specifications of the coating in this example;
TABLE 1
Comparative examples
(1) Uniformly mixing 80 parts of PVDF and 18 parts of mixed solvent (xylene/acetone/DMF in a volume ratio of 3/3/1) by mass with a high-speed stirrer, adding the mixture into a paint mixing tank, starting the high-speed stirrer, sequentially adding 5 parts of KH550 silane coupling agent, 4 parts of leveling agent isophorone and 5 parts of bentonite, uniformly stirring, and grinding the fineness of the paint paste to below 30 mu m by using a three-roll grinder;
(2) then placing the mixture in a paint mixing tank; starting a high-speed stirrer, adding 0.5 part of unmodified graphene oxide, stirring and grinding at a high speed (3000r/min) for 1h, complementing a solvent to adjust to the solid content of the original formula, filtering by using a 100-mesh filter screen, adding 10 parts of a curing agent and 15 parts of a diluent into the solution, and uniformly mixing to obtain the benzoyl hydrazine modified graphene oxide metal anticorrosive paint.
The nonvolatile content was measured according to the regulations GB/T1725-2007, the fineness was measured according to the regulations GB/T1724-1979, and the drying time was measured according to the regulations GB/T1728-1979. And coating the prepared coating on the surface of the tinplate, and standing at room temperature for 3 days to prepare a sample plate for later use. The appearance of the coating film was visually observed under scattered sunlight, and the water resistance test was carried out according to the regulation of the A method of GB/T1733-1933, the acid resistance test was carried out according to the regulation of the immersion method of GB/T9274-1988, and the salt spray resistance test was carried out according to the regulation of GB/T1771-2007, and the immersion method test methods were as described above. The specifications of the coatings in this comparative example are also shown in Table 1.
Compared with indexes of benzoyl hydrazine modified GO coating and indexes of unmodified GO coating, the modified graphene oxide coating has better technical indexes than the unmodified graphene oxide/polyvinylidene fluoride coating.
According to the invention, graphene oxide with modified surface modification is used as a novel anticorrosive material and added into a common polyvinylidene fluoride anticorrosive coating to prepare the novel metal anticorrosive coating. The modified graphene oxide is easier to adsorb on the metal surface, and the adhesiveness of the coating is improved. The graphene oxide in the coating disclosed by the invention is low in usage amount, and has the characteristics of good toughness, strong adhesive force, good water resistance, high hardness, good corrosion resistance and the like.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in other forms without departing from the spirit or essential characteristics thereof. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (10)
1. The modified graphene oxide metal anticorrosive paint for the primary equipment in the coastal region is characterized by comprising the following components in parts by weight: comprises the following components in parts by weight: 50-100 parts of polyvinylidene fluoride, 0.1-1 part of benzoyl hydrazine modified graphene oxide powder, 3-7 parts of a dispersing agent, 2-6 parts of a leveling agent, 5-15 parts of a curing agent, 10-20 parts of a diluent, 1-10 parts of a functional filler and 15-20 parts of a mixed solvent.
2. The modified graphene oxide metal anticorrosive paint for the primary equipment in the coastal region according to claim 1, characterized in that: the preparation method of the benzoyl hydrazine modified graphene oxide powder comprises the following steps:
(1) dispersing graphene oxide in a solvent, adding benzoyl hydrazine, performing ultrasonic treatment and separation to obtain a benzoyl hydrazine modified graphene oxide crude product, wherein the molar ratio of the graphene oxide to the benzoyl hydrazine is 1: 1-5;
(2) and (2) purifying the modified graphene oxide crude product obtained in the step (1) to obtain benzoyl hydrazine modified graphene oxide.
3. The modified graphene oxide metal anticorrosive paint for the primary equipment in the coastal region according to claim 1, characterized in that: the polyvinylidene fluoride selects either PVDF T-1 or PVDF2801 with a Molecular Weight (MW) in the range of 35-50 ten thousand.
4. The modified graphene oxide metal anticorrosive paint for the primary equipment in the coastal region according to claim 1, characterized in that: the functional filler is one or a mixture of more than two of bentonite, silicon dioxide, titanium dioxide and barium sulfate.
5. The modified graphene oxide metal anticorrosive paint for the primary equipment in the coastal region according to claim 1, characterized in that: the mixed solvent is a mixture of more than two of DMF, acetone, xylene, ethanol and butyl ester.
6. The modified graphene oxide metal anticorrosive paint for the primary equipment in the coastal region according to claim 1, characterized in that: the dispersant uses a silane coupling agent KH550 or KH 570.
7. The modified graphene oxide metal anticorrosive paint for the primary equipment in the coastal region according to claim 1, characterized in that: isophorone or diacetone alcohol is used as the leveling agent.
8. The modified graphene oxide metal anticorrosive paint for the primary equipment in the coastal region according to claim 1, characterized in that: the curing agent uses HDI biuret, HDI tripolymer or IPDI isophorone diamine.
9. The modified graphene oxide metal anticorrosive paint for the primary equipment in the coastal region according to claim 1, characterized in that: comprises the following components in parts by weight: 70 parts of polyvinylidene fluoride, 0.5 part of benzoyl hydrazine modified graphene oxide powder, 5 parts of a dispersing agent, 4 parts of a flatting agent, 10 parts of a curing agent, 15 parts of a diluent, 5 parts of a functional filler and 18 parts of a mixed solvent.
10. A preparation method of a modified graphene oxide metal anticorrosive paint for primary equipment in coastal areas is characterized by adopting the components in the modified graphene oxide metal anticorrosive paint for the primary equipment in coastal areas, which is disclosed by any one of claims 1 to 9, and comprises the following steps:
step S1, uniformly mixing polyvinylidene fluoride and the mixed solvent by using a high-speed stirrer, and adding the mixture into a paint mixing tank;
step S2, starting the high-speed stirrer, sequentially adding the dispersing agent, the leveling agent and the functional filler, and uniformly stirring;
step S3, after stirring uniformly, grinding the fineness of the paint paste to be below 30 mu m by a three-roll grinder, and then placing the paint paste in a paint mixing tank;
step S4, starting a high-speed stirrer, adding benzoyl hydrazine modified graphene oxide powder, and stirring at a high speed of 3000r/min for 1 h;
and step S5, filtering with a 90-110 mesh filter screen, adding a curing agent and a diluent into the filtered solution, and uniformly mixing to obtain the benzoyl hydrazine modified graphene oxide metal anticorrosive paint.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111925696A (en) * | 2020-07-31 | 2020-11-13 | 江苏华夏制漆科技有限公司 | Long-acting heavy-duty anticorrosive coating |
| WO2021243771A1 (en) * | 2020-06-03 | 2021-12-09 | 深圳先进技术研究院 | Anti-corrosion system, preparation method therefor, and anti-corrosion coating |
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