CN108219622B - Graphene-based low-density anticorrosive paint for aluminum alloy and preparation method thereof - Google Patents
Graphene-based low-density anticorrosive paint for aluminum alloy and preparation method thereof Download PDFInfo
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- CN108219622B CN108219622B CN201711300934.7A CN201711300934A CN108219622B CN 108219622 B CN108219622 B CN 108219622B CN 201711300934 A CN201711300934 A CN 201711300934A CN 108219622 B CN108219622 B CN 108219622B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/328—Phosphates of heavy metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention belongs to the technical field of coatings, and particularly relates to a graphene-based low-density anticorrosive coating for an aluminum alloy and a preparation method thereof. The graphene-based low-density anticorrosive paint for the aluminum alloy comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 40-60 parts of epoxy resin, 5-15 parts of graphene slurry, 10-20 parts of pigment, 5-10 parts of filler, 0.5-1.5 parts of flatting agent, 0.5-1 part of dispersing agent and 10-20 parts of diluent. The paint prepared by the invention has low surface density, light weight and better corrosion resistance. Compared with the existing coating, the coating prepared by the invention has the characteristics of good mechanical property, good flexibility, adhesive force, water resistance, gasoline resistance, salt mist resistance, light weight and low surface density, is beneficial to reducing weight of coating equipment, and has huge application potential and wide application prospect in the field of aviation.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a graphene-based low-density anticorrosive coating for an aluminum alloy and a preparation method thereof.
Background
The aluminum alloy has the advantages of low density, light weight, good corrosion resistance, high specific strength, excellent mechanical property and easy processing and forming, so that the aluminum alloy product can be widely applied to the fields of aviation, aerospace, automobiles and the like.
However, the structural metal materials such as aluminum alloy often corrode due to the action of environmental media, which results in the strength reduction or failure of the materials, and shortens the service life of the equipment, and even causes great damage and loss in severe cases. The most simple and effective protection measure is to coat a layer of protective anticorrosive paint on the surface of the aluminum alloy. In order to achieve a good anticorrosion effect, the traditional paint can be added with high-content anticorrosion pigments and fillers, so that the density of a paint film of the paint is high, and the weight of airplanes and automobiles can be increased. Therefore, it is necessary to study a low-density anticorrosive paint for application to the field of light aluminum alloys.
The graphene is a novel nano sheet material, has excellent blocking and shielding properties, and can effectively resist permeation of water molecules, oxygen and corrosive ions, so that the corrosion resistance is improved. However, the application of graphene is limited by the specific defects of easy agglomeration and difficult dispersion of graphene, and the existing anticorrosive paint prepared by utilizing graphene powder is heavy and high in surface density, and cannot meet the application of lightweight paint in the field of aluminum alloy.
Disclosure of Invention
In order to overcome the defect of high surface density in the coating in the prior art, the invention provides a graphene-based low-density anticorrosive coating for aluminum alloy and a preparation method thereof.
The graphene-based low-density anticorrosive paint for the aluminum alloy comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 40-60 parts of epoxy resin, 5-15 parts of graphene slurry, 10-20 parts of pigment, 5-10 parts of filler, 0.5-1.5 parts of flatting agent, 0.5-1 part of dispersing agent and 10-20 parts of diluent.
The component B is a polyamide curing agent which is one or a mixture of more than two of Versamid 115, Versamid125 and Versamid 140.
Specifically, the component A and the component B are mixed according to the weight part ratio of 100: 30-60.
Specifically, the epoxy resin is one or a mixture of more than two of E-44 type epoxy resin, E-20 type epoxy resin or E-02 type epoxy resin.
Specifically, the pigment is one or a mixture of more than two of zinc phosphate, aluminum tripolyphosphate, mica powder or strontium yellow.
Specifically, the filler is one or a mixture of two of talcum powder or precipitated barium sulfate.
Specifically, the leveling agent is one or a mixture of two of EFKA3777 and EFKA 3600.
Specifically, the dispersant is one or a mixture of two of EFKA4010 or EFKA 5065.
Specifically, the diluent is one or a mixture of more than two of xylene, propylene glycol methyl ether acetate or butanol.
In addition, the invention also provides a preparation method of the graphene-based low-density anticorrosive paint for the aluminum alloy, which comprises the following steps of (1) adding the polyurethane dispersant 7163 into a solvent, uniformly stirring, adding the graphene powder, stirring and dispersing, wherein the temperature of slurry is kept to be 22-28 ℃ in the dispersing process; (2) and then uniformly mixing the epoxy resin and the diluent to form a mixture, adding the graphene slurry, the pigment, the filler, the flatting agent and the dispersing agent into the mixture, stirring, grinding, filtering and packaging.
Specifically, in the grinding step, grinding is carried out until the fineness reaches 40 μm or less, and in the filtering, the filtering is carried out by using a 120-mesh filter screen.
Specifically, in the step (1), the solvent is a mixed solution of xylene, butyl acetate and cyclohexanone, and the ratio of xylene: butyl acetate: the mass ratio of cyclohexanone is 1:1: 1.
The invention has the beneficial effects that: (1) in addition, due to the introduction of the graphene slurry, the dosage of the conventional anti-corrosion pigment and filler is reduced, so that the coating prepared by the method is light in weight and low in surface density; (2) the graphene slurry in the coating prepared by the invention is uniformly dispersed, and the blocking and shielding effects of the graphene sheet are effectively exerted, so that the corrosion resistance of the low-density anticorrosive coating is greatly improved, and the coating has light weight and good corrosion resistance; (3) compared with the existing coating, the coating prepared by the invention has the characteristics of good mechanical property, good flexibility, adhesive force, water resistance, gasoline resistance, salt mist resistance, light weight and low surface density, is beneficial to reducing weight of coating equipment, and has huge application potential and wide application prospect in the field of aviation.
Detailed Description
The present invention will be further described with reference to the following examples.
Comparative experiment of graphene slurry with ordinary graphene regarding dispersibility:
respectively taking 0.1g of graphene and 0.1g of graphene slurry, placing the graphene slurry and the graphene slurry in 2 different small bottles, adding 30g of mixed solvent (the volume ratio of xylene to butanol is 4:1) into each small bottle, ultrasonically dispersing for 1 hour, uniformly dispersing 2 bottles of mixed solution, and standing for 96 hours for observation.
The dispersion liquid of the graphene slurry is always kept uniform, and no layering phenomenon occurs, but the common graphene dispersion liquid has an obvious layering phenomenon, the upper layer is clear liquid, and the lower layer is graphene. Therefore, the dispersion stability of the common graphene is poor, and the sheets are easy to agglomerate and settle because the pi-pi bond interaction force between the graphene sheets is large. And polymer chain segments are grafted between the sheet layers of the graphene slurry, and the steric hindrance effect of the graphene slurry hinders acting force between the graphene sheet layers, so that agglomeration is difficult to form to cause sedimentation, and the graphene slurry can always keep good dispersing performance.
Examples 1 to 3
Examples 1 to 3 formulations of low density anticorrosive coatings for graphene-based aluminum alloys, except for the differences shown in table 1. Wherein, Versamid 115, Versamid125 and Versamid 140 in the component B are all purchased from Corning chemical industry (China) Co.
TABLE 1
The preparation method of the graphene slurry comprises the following steps: adding a polyurethane dispersant 7163 into a solvent, uniformly stirring, adding graphene powder, and adding dimethylbenzene: butyl acetate: stirring for 30min at a stirring speed of 300r/min at a mass ratio of 1:1:1 of cyclohexanone, then performing ultrasonic treatment for 8s by using an industrial ultrasonic dispersion instrument, stopping performing ultrasonic treatment for 20s, performing ultrasonic treatment for 2h again, and cooling by using circulating water in the dispersion process to keep the temperature of the slurry at 25 ℃. Through the treatment of the graphene powder, the obtained graphene slurry has good dispersion stability, and the coating prepared from the graphene slurry has the characteristics of low surface density and light weight, so that the low-density anticorrosive coating for the aluminum alloy of the graphene has wide application prospect in the field of light aluminum alloys.
The preparation method of the component A comprises the steps of firstly, uniformly mixing the epoxy resin and the diluent to form a mixture, then adding the graphene slurry, the pigment, the filler, the flatting agent and the dispersing agent into the mixture, stirring, grinding and grinding until the fineness reaches below 40 mu m, then filtering by using a 120-mesh filter screen and packaging.
The component B is a polyamide curing agent which is one or a mixture of more than two of Versamid 115, Versamid125 and Versamid 140.
And mixing the component A and the component B according to the weight part ratio of 100: 30-60, and uniformly stirring to obtain the graphene low-density anticorrosive paint for the aluminum alloy.
Table 2 shows a comparison of the overall physical properties of the graphene low-density anticorrosive paint for aluminum alloys prepared in examples 1 to 3 and a commercially available aluminum alloy anticorrosive paint (model number: H06-27)
As can be seen from Table 2, the coating prepared by the invention has low surface density, light weight and better corrosion resistance. Compared with the existing coating, the coating prepared by the invention has the characteristics of good mechanical property, good flexibility, adhesive force, water resistance, gasoline resistance, salt mist resistance, light weight and low surface density, is beneficial to reducing weight of coating equipment, and has huge application potential and wide application prospect in the field of aviation.
The above embodiments are only some examples of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent change and modification to the above embodiments according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (10)
1. The graphene-based low-density anticorrosive paint for the aluminum alloy is characterized by comprising the following components in parts by weight: the adhesive comprises a component A and a component B, wherein the component A comprises the following components in parts by weight:
the component B is a polyamide curing agent which is one or a mixture of more than two of Versamid 115, Versamid125 and Versamid 140;
adding a polyurethane dispersant 7163 into a solvent, uniformly stirring, adding graphene powder, stirring and dispersing, wherein the temperature of the slurry is kept to be 22-28 ℃ in the dispersing process to obtain graphene slurry;
the component A and the component B are mixed according to the weight part ratio of 100: 30-60.
2. The graphene-based low-density anticorrosive paint for aluminum alloys according to claim 1, characterized in that: the epoxy resin is one or a mixture of more than two of E-44 type epoxy resin, E-20 type epoxy resin or E-02 type epoxy resin.
3. The graphene-based low-density anticorrosive paint for aluminum alloys according to claim 1, characterized in that: the pigment is one or a mixture of more than two of zinc phosphate, aluminum tripolyphosphate, mica powder or strontium yellow.
4. The graphene-based low-density anticorrosive paint for aluminum alloys according to claim 1, characterized in that: the filler is one or a mixture of two of talcum powder or precipitated barium sulfate.
5. The graphene-based low-density anticorrosive paint for aluminum alloys according to claim 1, characterized in that: the leveling agent is one or a mixture of EFKA3777 and EFKA 3600.
6. The graphene-based low-density anticorrosive paint for aluminum alloys according to claim 1, characterized in that: the dispersant is one or a mixture of two of EFKA4010 or EFKA 5065.
7. The graphene-based low-density anticorrosive paint for aluminum alloys according to claim 1, characterized in that: the diluent is one or a mixture of more than two of dimethylbenzene, propylene glycol methyl ether acetate or butanol.
8. The preparation method of the graphene-based aluminum alloy low-density anticorrosive paint according to any one of claims 1 to 7, comprising the following steps:
(1) firstly, adding a polyurethane dispersant 7163 into a solvent, uniformly stirring, adding graphene powder, stirring and dispersing, wherein the temperature of slurry is kept to be 22-28 ℃ in the dispersing process to obtain graphene slurry;
(2) and then uniformly mixing the epoxy resin and the diluent to form a mixture, adding the graphene slurry, the pigment, the filler, the flatting agent and the dispersing agent into the mixture, stirring, grinding, filtering and packaging.
9. The preparation method of the graphene-based low-density anticorrosive paint for aluminum alloy according to claim 8, characterized in that: in the grinding step, grinding is carried out until the fineness reaches below 40 mu m, and during filtering, a 120-mesh filter screen is used for filtering.
10. The preparation method of the graphene-based low-density anticorrosive paint for aluminum alloy according to claim 8, characterized in that: in the step (1), the solvent is a mixed solution of xylene, butyl acetate and cyclohexanone, wherein the ratio of xylene: butyl acetate: the mass ratio of cyclohexanone is 1:1: 1.
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| CN109486342A (en) * | 2018-09-05 | 2019-03-19 | 广西大学 | A kind of anticorrosive paint of D structure graphene reinforced epoxy |
| CN111118485A (en) * | 2019-12-13 | 2020-05-08 | 东莞市富发化工材料有限公司 | Novel antirust agent and preparation method thereof |
| CN115029026B (en) * | 2022-06-08 | 2023-04-28 | 新化县中润化学科技有限公司 | Graphene anti-corrosion coating for magnesium alloy and preparation method thereof |
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| CN106280908A (en) * | 2016-08-23 | 2017-01-04 | 中国科学院宁波材料技术与工程研究所 | Corrosive protection of aluminium alloy coating, its preparation method and application |
| CN106800862A (en) * | 2016-12-28 | 2017-06-06 | 中海油常州涂料化工研究院有限公司 | A kind of new anti-corrosion coating composition and preparation method thereof |
| CN106833287A (en) * | 2017-03-07 | 2017-06-13 | 中国科学院宁波材料技术与工程研究所 | Magnesium alloy AZ31B anticorrosive paints, its preparation method and application |
| CN107189638A (en) * | 2017-07-06 | 2017-09-22 | 浩力森涂料（上海）有限公司 | Watersoluble plumbago alkene anticorrosive paint |
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| TWI555803B (en) * | 2014-07-31 | 2016-11-01 | 中原大學 | Ananticorrosive layer having a biomimetic leaf surface nano-microstructure and the application thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106280908A (en) * | 2016-08-23 | 2017-01-04 | 中国科学院宁波材料技术与工程研究所 | Corrosive protection of aluminium alloy coating, its preparation method and application |
| CN106800862A (en) * | 2016-12-28 | 2017-06-06 | 中海油常州涂料化工研究院有限公司 | A kind of new anti-corrosion coating composition and preparation method thereof |
| CN106833287A (en) * | 2017-03-07 | 2017-06-13 | 中国科学院宁波材料技术与工程研究所 | Magnesium alloy AZ31B anticorrosive paints, its preparation method and application |
| CN107189638A (en) * | 2017-07-06 | 2017-09-22 | 浩力森涂料（上海）有限公司 | Watersoluble plumbago alkene anticorrosive paint |
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