CN110684467A - Water-based anticorrosive paint based on graphene oxide and preparation method thereof - Google Patents
Water-based anticorrosive paint based on graphene oxide and preparation method thereof Download PDFInfo
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- 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
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- 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
- C09D5/103—Anti-corrosive paints containing metal dust containing Al
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- C09D5/18—Fireproof paints including high temperature resistant paints
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Abstract
The invention provides a graphene oxide-based water-based anticorrosive paint and a preparation method thereof, and relates to the technical field of surface engineering, wherein the paint comprises the following components in parts by mass: 40-45 parts of water-based resin, 10-12 parts of graphene oxide, 10-12 parts of silicon carbide, 6-8 parts of dispersing agent, 3-5 parts of aluminum powder and 120-200 parts of water. According to the invention, the corrosion resistance of the coating is improved through the combined action of the hexagonal honeycomb structure of the graphene oxide and the aluminum powder; the aluminum powder and the silicon carbide are combined to form an aluminum-silicon mixed structure, so that the compactness, the high temperature resistance and the corrosion resistance of the coating are further improved. Therefore, the graphene oxide-based water-based anticorrosive paint provided by the invention has excellent anticorrosive capability, adopts water base, and is environment-friendly and low in cost. The preparation method provided by the invention has the advantages that the bonding strength of the graphene oxide and the aluminum powder is very high, so that the corrosion resistance of the coating is effectively improved, and the method is simple and easy to control.
Description
Technical Field
The invention relates to the technical field of surface engineering, in particular to a graphene oxide-based water-based anticorrosive paint and a preparation method thereof.
Background
At present, in the process of engineering infrastructure, the requirements for corrosion resistance of surface engineering such as buildings, steel frame structures, outdoor facilities and the like are higher and higher, and due to the requirements for light weight and high strength, more and more metal structures are applied, including energy transportation pipelines, chemical containers, building bridges, coastal wharf facilities and the like, and the requirements for rust resistance and corrosion resistance are also improved accordingly.
The main components of the traditional anticorrosive paint are resin and the like, and the principle is mainly that the metal structure is isolated after being coated and condensed, so that the invasion of an external corrosive medium is avoided. However, in the existing corrosion, the conditions of the larger part of electric corrosion, ionization decomposition due to potential difference and the like exist, so that the metal corrosion is accelerated, and the traditional anticorrosive paint has a single anticorrosive function, cannot effectively block the electric corrosion and pollutes the environment.
The graphene-based anticorrosive paint is a novel anticorrosive paint which is gradually developed, and mainly takes pure graphene as an anticorrosive filler. However, the existing graphene-based anticorrosive paint can only play a certain role in blocking electric corrosion, and the improvement of the anticorrosive performance is not obvious, so that the application range of the paint is limited. Patent CN105349017B discloses an anticorrosive paint added with graphene/zinc composite material and a preparation method thereof, wherein the anticorrosive paint comprises the following components (by mass percent): 20-90% of polyurethane, 5-15% of graphene/zinc composite material, 1-10% of coloring pigment, 5-10% of filler, 0.1-3% of dispersing agent, 0.1-3% of wetting agent, 0.1-3% of thickening agent, 0.1-1% of flatting agent, 0.1-1% of defoaming agent, 0.1-1% of bactericide and 1-35% of water. The anticorrosive paint has improved anticorrosive performance, but zinc powder needs to be vaporized into zinc vapor to be compounded on the surface of graphene at high temperature in the preparation process, the method has the condition of insufficient bonding strength between the graphene and the zinc, and the process is complex.
Disclosure of Invention
In view of the above, the present invention aims to provide a graphene oxide-based water-based anticorrosive paint and a preparation method thereof. The graphene oxide-based water-based anticorrosive coating provided by the invention has excellent corrosion resistance, is environment-friendly and has low cost.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention provides a graphene oxide-based water-based anticorrosive paint which comprises the following components in parts by mass:
preferably, the dispersant is a polycarboxylate amine salt dispersant.
The invention provides a preparation method of a graphene oxide-based water-based anticorrosive paint in the scheme, which comprises the following steps:
mixing graphene oxide with water, and performing ultrasonic treatment to obtain a graphene oxide treatment solution;
ball-milling aluminum powder, and mixing with a PVA aqueous solution to obtain PVA modified aluminum powder;
mixing the PVA modified aluminum powder with water to obtain powder slurry;
loading an electric field on the outer side of the powder slurry, adding the graphene oxide treatment liquid into the powder slurry, and electrolyzing to obtain composite powder;
and sintering the composite powder in a protective atmosphere, and then mixing the sintered composite powder with water-based resin, a dispersing agent, water and silicon carbide to obtain the graphene oxide-based water-based anticorrosive paint.
Preferably, the ultrasonic treatment has a frequency of 28kHz, a power of 1000W and a time of 15 min.
Preferably, the rotation speed of the ball milling is 330-350 rpm, and the particle size of the aluminum powder after ball milling is 3-5 μm.
Preferably, the mass concentration of the PVA aqueous solution is 0.5-1.2 mol/L, and the mixing time of the aluminum powder and the PVA aqueous solution after ball milling is 15-20 min.
Preferably, the strength of the electric field is 60-80V/m.
Preferably, the sintering temperature is 550-600 ℃, and the time is 1.5-2 h.
Preferably, the temperature rise rate of the sintering is 50-70 ℃/min.
Preferably, after sintering, the obtained sintered product is milled, and the particle size after milling is 20-30 meshes.
The invention provides a graphene oxide-based water-based anticorrosive paint which comprises the following components in parts by mass: 40-45 parts of water-based resin, 10-12 parts of graphene oxide, 10-12 parts of silicon carbide, 6-8 parts of dispersing agent, 3-5 parts of aluminum powder and 120-200 parts of water. The graphene oxide-based water-based anticorrosive paint provided by the invention improves the corrosion resistance of the coating through the combined action of the hexagonal honeycomb structure of the graphene oxide and the aluminum powder, and can effectively inhibit external corrosion; the aluminum powder and the silicon carbide are combined to form an aluminum-silicon mixed structure, so that the compactness, high temperature resistance and corrosion resistance of the coating are further effectively improved. Therefore, the graphene oxide-based water-based anticorrosive paint provided by the invention has excellent anticorrosive capability, adopts water base, and is environment-friendly and low in cost. The example result shows that compared with the traditional epoxy resin coating and the existing graphene-based coating, the graphene oxide-based water-based anticorrosive coating provided by the invention has good mechanical properties and excellent chemical resistance and corrosion resistance, and can well protect a substrate from being corroded.
The invention provides a preparation method of the graphene oxide-based water-based anticorrosive paint. According to the invention, PVA is used as an aluminum powder surface modifier, and hydrogen-oxygen bonds are formed on the surface of modified aluminum powder particles, so that graphene oxide can be effectively wrapped; according to the invention, the graphene oxide with a multilayer structure is peeled off to form a single-layer structure through ultrasonic treatment, so that the utilization rate of the graphene oxide is improved, and the thickness of a layer film coated outside aluminum powder particles is reduced; according to the invention, the graphene oxide is wrapped on the aluminum powder particles to form composite powder under the action of the electric field, so that the bonding strength is high, and the hydro-electrolytic method is environment-friendly, pollution-free and high in preparation efficiency; according to the invention, the aluminum powder particles wrapped with the graphene oxide are sintered under the protective atmosphere, so that the wrapping state can be stabilized. Therefore, the preparation method provided by the invention has the advantages that the bonding strength of the graphene oxide and the aluminum powder is very high, the corrosion resistance of the coating is effectively improved, and the method is simple and easy to control.
Detailed Description
The invention provides a graphene oxide-based water-based anticorrosive paint which comprises the following components in parts by mass:
the graphene oxide-based water-based anticorrosive coating comprises 40-45 parts by mass of a water-based resin, preferably 42-44 parts by mass of the water-based resin, and more preferably 43 parts by mass of the water-based resin. The aqueous resin used in the present invention is not particularly limited, and any aqueous resin known in the art may be used, specifically, an aqueous epoxy resin, an aqueous acrylic resin, and the like.
The graphene oxide-based water-based anticorrosive coating provided by the invention comprises 10-12 parts of graphene oxide, preferably 10.5-11.5 parts of graphene oxide, and more preferably 11 parts of graphene oxide based on the mass parts of water-based resin. The graphene oxide is not particularly required in the present invention, and graphene oxide well known in the art may be used. In a specific embodiment of the present invention, the graphene oxide is preferably prepared by oxidizing graphite paper serving as a raw material with electrolyzed water. In the invention, compared with pure graphene, the graphene oxide has more oxygen-containing functional groups and more active properties, is easier to combine with aluminum powder particles, and improves the performance of the coating.
The graphene oxide-based water-based anticorrosive coating provided by the invention comprises 10-12 parts of silicon carbide, preferably 10.5-11.5 parts, and more preferably 11 parts by mass of water-based resin; the particle size of the silicon carbide is preferably 20-35 μm. The source of the silicon carbide is not particularly required in the present invention, and commercially available products well known in the art may be used.
The graphene oxide-based water-based anticorrosive coating provided by the invention comprises 6-8 parts of a dispersing agent, preferably 6.5-7.5 parts, and more preferably 7 parts by mass of a water-based resin. In the present invention, the dispersant is preferably a polycarboxylic acid ammonium salt dispersant; the source of the polycarboxylic acid ammonium salt dispersant is not particularly required in the present invention, and a commercially available product well known in the art may be used.
The graphene oxide-based water-based anticorrosive paint comprises 3-5 parts of aluminum powder, preferably 3.5-4.5 parts, and more preferably 4 parts by mass of water-based resin. The source of the aluminum powder is not particularly required in the present invention, and commercially available products well known in the art may be used.
The graphene oxide-based water-based anticorrosive coating provided by the invention comprises 120-200 parts of water, preferably 150-200 parts of water, and more preferably 180 parts of water based on the mass parts of the water-based resin. The invention has no special requirement on the water, and the water which is well known in the field can be adopted; in a specific embodiment of the present invention, the water is preferably deionized water.
The invention provides the water-based anticorrosive coating based on the graphene oxide, and the corrosion resistance of the coating is improved through the combined action of the hexagonal honeycomb structure of the graphene oxide and aluminum powder, so that the external corrosion can be effectively inhibited; the aluminum powder and the silicon carbide are combined to form an aluminum-silicon mixed structure, so that the compactness, high temperature resistance and corrosion resistance of the coating are further effectively improved. Therefore, the graphene oxide-based water-based anticorrosive paint provided by the invention has excellent anticorrosive capability, adopts water base, and is environment-friendly and low in cost.
The invention provides a preparation method of a graphene oxide-based water-based anticorrosive paint in the scheme, which comprises the following steps:
mixing graphene oxide with water, and performing ultrasonic treatment to obtain a graphene oxide treatment solution;
ball-milling aluminum powder, and mixing with a PVA aqueous solution to obtain PVA modified aluminum powder;
mixing the PVA modified aluminum powder with water to obtain powder slurry;
loading an electric field on the outer side of the powder slurry, adding the graphene oxide treatment liquid into the powder slurry, and electrolyzing to obtain composite powder;
and sintering the composite powder in a protective atmosphere, and then mixing the sintered composite powder with water-based resin, a dispersing agent, water and silicon carbide to obtain the graphene oxide-based water-based anticorrosive paint.
According to the invention, graphene oxide and water are mixed for ultrasonic treatment to obtain a graphene oxide treatment solution. In the invention, the mass ratio of the graphene oxide to water is preferably 1: 8-12, more preferably 1: 12. in the present invention, the frequency of the ultrasonic treatment is preferably 28kHz, the power is preferably 1000W, and the time is preferably 15 min. And degrading the aqueous solution of the graphene oxide to brown after ultrasonic treatment to obtain the graphene oxide treatment solution. According to the invention, the graphene oxide with a multilayer structure is peeled off to form a single-layer structure through ultrasonic treatment, so that the utilization rate of the graphene oxide can be improved, and the thickness of a layer film coated outside aluminum powder particles is reduced.
The PVA modified aluminum powder is obtained by mixing aluminum powder with PVA aqueous solution after ball milling. In the invention, the rotation speed of the ball mill is preferably 330-350 rpm, more preferably 340 rpm; the ball milling is preferably carried out by adopting a high-power ball mill; the particle size of the aluminum powder after ball milling is preferably 3-5 μm, and more preferably 4 μm. After ball milling, the aluminum powder is changed into a spherical shape from a flaky shape and a polyhedral shape. In the invention, the mass concentration of the PVA (polyvinyl alcohol) aqueous solution is preferably 0.8-1.2 mol/L, and more preferably 0.98 mol/L; the invention has no special requirement on the addition amount of the PVA aqueous solution, and can completely soak the aluminum powder after ball milling. In the invention, the mixing time of the aluminum powder subjected to ball milling and the PVA aqueous solution is preferably 15-20 min, and more preferably 17 min. The method of mixing is not particularly required in the present invention, and the aluminum powder can be sufficiently dispersed in the aqueous PVA solution by methods well known in the art, specifically, stirring and mixing. After mixing, the invention preferably performs solid-liquid separation on the obtained mixed solution to obtain solid which is the PVA modified aluminum powder; the method of the present invention for solid-liquid separation is not particularly limited, and any method known in the art may be used. According to the invention, PVA is used as an aluminum powder surface modifier, a hydrophilic PVA film is formed on the surface of ball-milled spherical aluminum powder, and hydrogen-oxygen bonds are formed on the surface of modified aluminum powder particles, so that graphene oxide can be effectively wrapped.
After the PVA modified aluminum powder is obtained, the PVA modified aluminum powder is mixed with water to obtain powder slurry. In the invention, the mass ratio of the PVA modified aluminum powder to water is preferably 1: 0.5-0.8, more preferably 1: 0.6. the invention has no special requirements on the mixing method, and can ensure that the PVA modified aluminum powder and the water are uniformly mixed.
After the powder slurry is obtained, an electric field is loaded on the outer side of the powder slurry, the graphene oxide treatment liquid is added into the powder slurry, and composite powder is obtained through electrolysis. In the present invention, the strength of the electric field is preferably 60 to 80V/m, and more preferably 70V/m. The method of the present invention for applying the electric field is not particularly limited, and any method known in the art may be used. According to the invention, the mixed slurry is preferably stirred in the electrolysis process, so that the dispersion of the graphene oxide and the PVA modified aluminum powder is promoted. In the invention, the electrolysis time is based on brown fading of the mixed slurry; after electrolysis, in the present invention, the mixed slurry after electrolysis is preferably washed with water to obtain a composite powder. According to the invention, graphene oxide is wrapped on aluminum powder particles to form composite powder under the action of an electric field (namely, a hydro-electrolytic method is adopted), wherein the aluminum powder surface is positively charged, the graphene oxide is negatively charged due to the ionization of carboxyl and hydroxyl, the aluminum powder and the graphene oxide are mutually adsorbed, the bonding strength is high, and the hydro-electrolytic method is environment-friendly, pollution-free and high in preparation efficiency.
After the composite powder is obtained, the composite powder is sintered under a protective atmosphere and then mixed with water-based resin, a dispersing agent, water and silicon carbide to obtain the graphene oxide-based water-based anticorrosive paint. In the invention, the sintering temperature is preferably 550-600 ℃, more preferably 570 ℃, and the time is preferably 1.5-2 h, more preferably 1.7 h. In the invention, the heating rate of the sintering is preferably 50-70 ℃/min, and more preferably 60 ℃/min. In the invention, protective atmosphere is continuously introduced in the sintering process; the protective atmosphere is preferably argon or nitrogen; when the protective atmosphere is argon, the flow rate of the argon is 50 cc/min; when the protective atmosphere is preferably nitrogen, the flow rate of the nitrogen is preferably 100 cc/min. In the invention, after sintering, the obtained sintered product is also preferably milled, and the milled particle size is preferably 20-30 meshes. The present invention does not require any particular method for milling, and may be performed by methods well known in the art. The aluminum powder particles wrapped with the graphene oxide, namely the composite powder, are sintered under the protective atmosphere, so that the wrapping state can be stabilized. And sintering the composite powder in a protective atmosphere, and mixing the sintered composite powder with aqueous resin, a dispersing agent, water and silicon carbide. In the present invention, the order of mixing is preferably: sintering the composite powder, mixing the sintered composite powder with water-based resin and a dispersant, and adding water into the mixture for mixing; finally, silicon carbide is added to the mixed aqueous solution and mixed. The invention preferably carries out mixing under the condition of stirring, has no special requirements on the stirring speed and time, and ensures that all components are uniformly mixed. After mixing, the graphene oxide-based water-based anticorrosive paint is obtained.
The following examples are provided to illustrate the graphene oxide-based water-based anticorrosive coating and the preparation method thereof in detail, but they should not be construed as limiting the scope of the present invention.
Example 1
A graphene oxide-based water-based anticorrosive coating comprising: 45 parts of water-based resin, 10 parts of graphene oxide, 12 parts of silicon carbide, 8 parts of polycarboxylic acid ammonium salt dispersing agent, 3 parts of aluminum powder and 200 parts of deionized water, wherein the components are proportioned according to parts by mass. The preparation method comprises the following steps:
1) putting the graphene oxide in the components into deionized water, wherein the mass ratio of the graphene oxide to the deionized water is 1:12, degrading the solution by ultrasonic waves until the solution is brown;
2) carrying out ball milling on aluminum powder, and refining to 5 mu m; the aluminum powder ball milling is carried out by adopting a high-power ball mill, and the rotating speed is 330 rpm;
3) treating the ball-milled spherical aluminum powder in the step 2) by adopting a PVA aqueous solution to form a hydrophilic PVA film on the surface;
4) putting the modified aluminum powder in the step 3) into deionized water for mixing, wherein the mass ratio of the modified aluminum powder to the deionized water is 1:0.6, and forming powder slurry;
5) loading an electric field on the outer side of the powder slurry in the step 4), wherein the electric field can enable the aluminum powder and the graphene oxide to have charges and attract each other;
6) gradually adding the solution obtained in the step 1) into powder slurry placed in an electric field, performing dispersion stirring, and performing mechanical stirring until the slurry fades from brown;
7) washing and cleaning the powder slurry obtained in the step 6), heating to 550 ℃ at a heating rate of 50 ℃ per minute, preserving heat, and continuously injecting argon for 2 hours in the heating process; argon gas is in a constant flow state, and the flow rate is 50cc per minute;
8) grinding the sintered product in the step 7) into powder, mechanically stirring and mixing the powder, the water-based resin and the dispersant, and adding water for mixing and stirring;
9) adding silicon carbide into the solution obtained in the step 8), and continuously stirring and mixing to obtain the graphene oxide-based water-based anticorrosive paint.
Example 2
A graphene oxide-based water-based anticorrosive coating comprising: 40 parts of water-based resin, 12 parts of graphene oxide, 10 parts of silicon carbide, 6 parts of polycarboxylic acid ammonium salt dispersing agent, 5 parts of aluminum powder and 180 parts of deionized water, wherein the components are proportioned according to parts by mass. The preparation method comprises the following steps:
1) putting the graphene oxide in the components into deionized water, wherein the mass ratio of the graphene oxide to the deionized water is 1:12, and performing ultrasonic degradation on the solution until the solution is brown;
2) carrying out ball milling on aluminum powder, and refining to 3 mu m; the aluminum powder ball milling is carried out by adopting a high-power ball mill, and the rotating speed is 350 rpm;
3) treating the ball-milled spherical aluminum powder in the step 2) by adopting a PVA aqueous solution to form a hydrophilic PVA film on the surface;
4) putting the modified aluminum powder in the step 3) into deionized water for mixing, wherein the mass ratio of the modified aluminum powder to the deionized water is 1:0.6, and forming powder slurry;
5) loading an electric field on the outer side of the powder slurry in the step 4);
6) gradually adding the solution obtained in the step 1) into powder slurry placed in an electric field, performing dispersion stirring, and performing mechanical stirring until the slurry fades from brown;
7) washing and cleaning the powder slurry obtained in the step 6), heating to 600 ℃ at a heating rate of 50 ℃ per minute, preserving heat, continuously injecting nitrogen in the heating process, wherein the injection flow is 100cc/min, and the duration is 1.5 hours;
8) grinding the sintered product in the step 7) into powder, mechanically stirring and mixing the powder with water-based resin and a dispersant, and adding deionized water into the mixture and stirring and mixing the mixture;
9) adding silicon carbide into the solution obtained in the step 8), and continuously stirring and mixing to obtain the graphene oxide-based water-based anticorrosive paint.
Example 3
A graphene oxide-based water-based anticorrosive coating comprising: 42 parts of water-based resin, 11 parts of graphene oxide, 11 parts of silicon carbide, 7 parts of a polycarboxylate dispersant, 4 parts of aluminum powder and 120 parts of deionized water, wherein the components are proportioned according to parts by mass. The preparation method comprises the following steps:
1) putting the graphene oxide in the components into deionized water, wherein the mass ratio of the graphene oxide to the deionized water is 1:12, degrading the solution by ultrasonic waves until the solution is brown;
2) carrying out ball milling on aluminum powder, and refining to 3.5 mu m; the aluminum powder ball milling is carried out by adopting a high-power ball mill, and the rotating speed is 340 rpm;
3) treating the ball-milled spherical aluminum powder in the step 2) by adopting a PVA aqueous solution to form a hydrophilic PVA film on the surface;
4) putting the modified aluminum powder in the step 3) into deionized water for mixing, wherein the mass ratio of the modified aluminum powder to the deionized water is 1:0.6, and forming powder slurry;
5) loading an electric field on the outer side of the powder slurry in the step 4);
6) gradually adding the solution obtained in the step 1) into powder slurry placed in an electric field, performing dispersion stirring, and performing mechanical stirring until the slurry fades from brown;
7) washing and cleaning the powder slurry obtained in the step 6), heating to 580 ℃ at a heating rate of 60 ℃ per minute, preserving heat, and continuously injecting inert protective gas for 1.8 hours in the heating process;
8) grinding the sintered product in the step 7) into powder, mechanically stirring and mixing the powder with water-based resin and a dispersant, and adding deionized water into the mixture and stirring and mixing the mixture;
9) adding silicon carbide into the solution obtained in the step 8), and continuously stirring and mixing to obtain the graphene oxide-based water-based anticorrosive paint.
The water-based anticorrosive coating based on graphene oxide prepared in the embodiments 1 to 3 is silver gray after being cured into a film, and has granular feel and metallic luster on the surface; observing the microstructure of the aluminum powder and the graphene oxide, finding that the aluminum powder particles wrapped with the graphene oxide exist independently and are uniformly distributed at each position under the action of a dispersing agent to form a spherical composite coating.
The performances of the graphene oxide-based water-based anticorrosive coatings prepared in examples 1 to 3 were respectively tested, and in the testing process, an epoxy resin coating commonly used for corrosion prevention and a graphene-based coating (jingling coating HGM-10) of a certain manufacturer were respectively used as comparative examples.
(1) Test of Corrosion resistance
The coatings prepared in examples 1 to 3, the epoxy resin coating as a comparative example and the graphene-based coating (jingling coating HGM-10) of a certain manufacturer were respectively coated on the surface of carbon steel, the coating thickness was 220 μm, and the corrosion potentials of the carbon steel were respectively detected after curing to form a film, and the results are shown in Table 1:
TABLE 1 Corrosion resistance of graphene oxide-based water-based anticorrosive coatings prepared in examples 1 to 3
(2) Physical and chemical Property testing
Respectively carrying out physical and chemical performance tests on paint films formed by the paint prepared in examples 1-3 and the epoxy resin paint serving as a comparative example and a graphene-based paint (Jinling paint HGM-10) of a certain manufacturer, determining the thickness of the paint film according to GB/T13452.2-2008, determining the adhesion of the paint film according to GB/T9286-1998, determining the flexibility of the paint film according to GB/T6742-2007, determining the impact resistance of the paint film according to GB/T1732-1993, determining the water resistance of the paint film according to GB/T1733-1993, determining the hardness of the paint film according to GB/T6739-2006, and determining the neutral salt spray resistance of the paint film according to GB/T1771-2007; the test results are shown in table 2: TABLE 2 physical and chemical properties of graphene oxide-based water-based anticorrosive coatings prepared in examples 1 to 3
As can be seen from tables 1 and 2, compared with the conventional epoxy resin coating and the existing graphene-based coating, the graphene oxide-based water-based anticorrosive coating provided by the invention has good mechanical properties and excellent chemical and corrosion resistance, and can well protect a substrate from corrosion.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The water-based anticorrosive paint based on graphene oxide is characterized by comprising the following components in parts by mass:
2. the graphene oxide-based water-based anticorrosive paint according to claim 1, wherein the dispersant is a polycarboxylate amine salt dispersant.
3. The method for preparing the graphene oxide-based water-based anticorrosive paint according to claim 1 or 2, comprising the steps of:
mixing graphene oxide with water, and performing ultrasonic treatment to obtain a graphene oxide treatment solution;
ball-milling aluminum powder, and mixing with a PVA aqueous solution to obtain PVA modified aluminum powder;
mixing the PVA modified aluminum powder with water to obtain powder slurry;
loading an electric field on the outer side of the powder slurry, adding the graphene oxide treatment liquid into the powder slurry, and electrolyzing to obtain composite powder;
and sintering the composite powder in a protective atmosphere, and then mixing the sintered composite powder with water-based resin, a dispersing agent, water and silicon carbide to obtain the graphene oxide-based water-based anticorrosive paint.
4. The method of claim 3, wherein the sonication is performed at a frequency of 28kHz, at a power of 1000W, and for a time of 15 min.
5. The preparation method of claim 3, wherein the rotation speed of the ball mill is 330-350 rpm, and the particle size of the aluminum powder after ball milling is 3-5 μm.
6. The preparation method of claim 3, wherein the mass concentration of the PVA aqueous solution is 0.5-1.2 mol/L, and the mixing time of the aluminum powder and the PVA aqueous solution after ball milling is 15-20 min.
7. The method according to claim 3, wherein the electric field has a strength of 60 to 80V/m.
8. The preparation method according to claim 3, wherein the sintering temperature is 550-600 ℃ and the sintering time is 1.5-2 h.
9. The production method according to claim 3 or 8, wherein the temperature increase rate of the sintering is 50 to 70 ℃/min.
10. The preparation method according to claim 3, wherein after the sintering, the obtained sintered product is milled, and the particle size after milling is 20-30 meshes.
Priority Applications (2)
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| CN201910961931.0A CN110684467A (en) | 2019-10-11 | 2019-10-11 | Water-based anticorrosive paint based on graphene oxide and preparation method thereof |
| PCT/CN2020/090250 WO2021068506A1 (en) | 2019-10-11 | 2020-05-14 | Water-based anticorrosive coating based on graphene oxide and preparation method therefor |
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Cited By (5)
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| WO2021068506A1 (en) * | 2019-10-11 | 2021-04-15 | 江苏冠军科技集团股份有限公司 | Water-based anticorrosive coating based on graphene oxide and preparation method therefor |
| CN113999587A (en) * | 2021-11-18 | 2022-02-01 | 深圳市彩蝶科技有限公司 | Automobile water-based flashing paint and preparation method thereof |
| CN115851076A (en) * | 2022-12-21 | 2023-03-28 | 湖北航天化学技术研究所 | Graphene zinc-containing antirust paint and preparation method thereof |
| CN116618266A (en) * | 2023-05-30 | 2023-08-22 | 中国科学院兰州化学物理研究所 | Wear-resistant and corrosion-resistant composite coating and preparation method and application thereof |
| CN117183518A (en) * | 2023-09-01 | 2023-12-08 | 青岛伟东包装有限公司 | High-ductility puncture-resistant plastic film and preparation method thereof |
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| CN114854279B (en) * | 2022-05-06 | 2023-01-24 | 江苏冠军科技集团股份有限公司 | Preparation method of zinc-coated graphene oxide composite anticorrosive paint |
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| CN116618266A (en) * | 2023-05-30 | 2023-08-22 | 中国科学院兰州化学物理研究所 | Wear-resistant and corrosion-resistant composite coating and preparation method and application thereof |
| CN116618266B (en) * | 2023-05-30 | 2024-02-20 | 中国科学院兰州化学物理研究所 | Wear-resistant and corrosion-resistant composite coating and preparation method and application thereof |
| CN117183518A (en) * | 2023-09-01 | 2023-12-08 | 青岛伟东包装有限公司 | High-ductility puncture-resistant plastic film and preparation method thereof |
| CN117183518B (en) * | 2023-09-01 | 2024-05-28 | 青岛伟东包装有限公司 | High-ductility puncture-resistant plastic film and preparation method thereof |
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| WO2021068506A1 (en) | 2021-04-15 |
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