CN112159117A - Method for rapidly preparing underwater super-oleophobic anticorrosive coating - Google Patents
Method for rapidly preparing underwater super-oleophobic anticorrosive coating Download PDFInfo
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- CN112159117A CN112159117A CN202011074031.3A CN202011074031A CN112159117A CN 112159117 A CN112159117 A CN 112159117A CN 202011074031 A CN202011074031 A CN 202011074031A CN 112159117 A CN112159117 A CN 112159117A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
- C03C17/38—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal at least one coating being a coating of an organic material
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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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/76—Hydrophobic and oleophobic coatings
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Abstract
The invention belongs to the technical field of corrosion prevention, and particularly relates to a method for quickly preparing an underwater super-oleophobic anticorrosive coating, which comprises the following steps: 1. an epoxy coating, wherein 7-10 parts by weight of epoxy resin and 1-3 parts by weight of curing agent are mixed, ultrasonically stirred and dissolved in 150 parts by weight of organic solvent, the epoxy solution is sprayed on a substrate on a heating table, and the epoxy coating is formed after precuring for 3-4 minutes; 2. and (3) preparing the underwater super oleophobic coating, namely spraying 1-2 parts by weight of hydrophilic nanoparticles on the epoxy coating, and curing the sprayed epoxy coating in an oven at the temperature of 60-130 ℃ to prepare the underwater super oleophobic coating. The preparation method selects a curing agent with a hydrophobic chain segment to perform curing reaction with epoxy resin, simultaneously bonds hydrophilic nano particles, and obtains the underwater super-oleophobic coating within 20 min. The problems of long preparation time, complex preparation process and poor chemical stability of the underwater super-oleophobic coating are solved.
Description
The technical field is as follows:
the invention belongs to the technical field of corrosion prevention, and particularly relates to a method for quickly preparing an underwater super-oleophobic anticorrosive coating.
Background art:
the underwater super-oleophobic coating has wide application prospects in the fields of petroleum transportation, oil drop control, antifouling materials, oil-water separation and the like, and thus the coating is widely concerned by researchers. At present, most of underwater super-oleophobic coatings are time-consuming to prepare and complex in process, the super-hydrophilicity of the surfaces of the coatings enables the coatings to absorb water easily, corrosion to a substrate is accelerated, the underwater mechanical strength of the coatings is reduced, the coatings are easy to peel off from the surfaces of the substrates, and the development of the coatings is greatly limited due to the property of the coatings which are not resistant to seawater and acid and alkali. Therefore, how to rapidly prepare the underwater super-oleophobic surface with high stability and strong adaptability becomes a problem which needs to be solved urgently by researchers. The epoxy resin has good cohesiveness, low water permeability, high mechanical stability and strong chemical stability, and the long-chain hydrophobic curing agent is selected when the curing agent is selected, so that the water permeability resistance of the coating can be further enhanced. Therefore, the underwater super-oleophobic coating is designed by bonding the hydrophilic nanoparticles with the simple epoxy resin which is not completely cured, so that the problems of structural damage and underwater mechanical strength reduction of the coating caused by water seepage of the conventional super-hydrophilic coating can be solved, and the stable underwater super-oleophobic coating is prepared. The preparation method of the coating is simple and rapid, and has the advantages of high mechanical stability, strong chemical stability, strong bonding force with a substrate and the like. The simple and rapid method provides a new idea for preparing the underwater super-oleophobic surface. At present, no technology for rapidly preparing the underwater super oleophobic coating by bonding hydrophilic nanoparticles with epoxy resin exists.
The invention content is as follows:
the invention aims to provide a method for rapidly preparing an underwater super-oleophobic anticorrosive coating, which aims to solve the problems in the background technology, and the preparation method selects a curing agent with a hydrophobic chain segment to perform curing reaction with epoxy resin, simultaneously bonds hydrophilic nano particles, and obtains the underwater super-oleophobic coating within 20 min. When water molecules are intended to contact the substrate through the hydrophilic nanoparticles, the hydrophobic segments of the epoxy resin and the curing agent prevent water on the hydrophilic nanoparticles from penetrating into the substrate surface. The method is simple and rapid, and can be used for large-scale preparation, and solves the problems of long preparation time, complex preparation process, and poor chemical stability (poor acid and alkali resistance and poor salt resistance) of the underwater super-oleophobic coating.
The technical scheme adopted by the invention is as follows: a method for rapidly preparing an underwater super-oleophobic anticorrosive coating comprises the following steps:
step one, epoxy coating
Mixing 7-10 parts by weight of epoxy resin and 1-3 parts by weight of curing agent, ultrasonically stirring and dissolving in 150 parts by weight of organic solvent, spraying the epoxy solution on a substrate on a heating table, and precuring for 3-4 minutes to form an epoxy coating;
step two, preparation of underwater super oleophobic coating
Spraying 1-2 parts by weight of hydrophilic nanoparticles on the epoxy coating, and curing the epoxy coating in an oven at 60-130 ℃ to prepare the underwater super-oleophobic coating.
Further, the epoxy resin is E44 epoxy resin or F51 epoxy resin.
Further, the curing agent is a cardanol modified amine epoxy curing agent DF 1228H.
Further, the organic solvent is ethyl acetate or ethanol.
Further, the temperature of the heating table is 40-120 ℃.
Further, the following steps: the hydrophilic nano particles are silicon dioxide, montmorillonite, attapulgite, nano kaolin or ferroferric oxide.
The invention has the beneficial effects that: the preparation process of the underwater super-oleophobic coating at the present stage is tedious and time-consuming, the super-hydrophilicity of the surface causes the coating to be easy to absorb water, the corrosion resistance is poor, and the coating can be separated from the substrate, so that the substrate loses the underwater super-oleophobic property. The preparation method has the advantages that the curing agent with the hydrophobic chain segment is used for carrying out curing reaction with the epoxy resin, the curing agent containing the hydrophobic chain segment can not only reduce the water permeability of the coating, but also reduce the capillary action between the curing agent and the hydrophilic nano particles by utilizing the opposite wettability between the curing agent and the hydrophilic nano particles, and the hydrophilic nano particles are not completely coated by the epoxy resin in the curing reaction process by combining a certain pre-curing action. The process ensures the binding force between the hydrophilic particles and the epoxy resin layer and the super-hydrophilicity of the surface, and improves the mechanical stability and the chemical stability of the coating. By reasonably selecting the epoxy resin and the curing agent and adjusting the spraying temperature and the curing temperature, the underwater super-oleophobic coating which is salt-resistant and penetrated by acid-base solution and the like can be quickly prepared. By soaking the prepared underwater superoleophobic coating in an acid-base solution with the pH =1 to the pH =14 and seawater for one month, the coating is found to be well adhered to the substrate, and the underwater oil drop contact angle of the surface of the coating is still kept above 150 degrees. Solves the problems of long preparation time, complex preparation process and poor chemical stability (poor acid and alkali resistance and poor salt resistance) of the underwater super oleophobic coating.
Description of the drawings:
FIG. 1 is the underwater oil repellency angle of the superhydrophilic SiO 2/epoxy surface of example two after one month in 1 mol sodium chloride.
The specific implementation mode is as follows:
example one
A method for rapidly preparing an underwater super-oleophobic anticorrosive coating comprises the steps of weighing 7g of F51 epoxy resin and 1g of cardanol modified amine epoxy curing agent, and dissolving the two in 100g of ethyl acetate by ultrasonic mixing and stirring; spraying the mixed solution of epoxy resin and curing agent on a glass sheet by a spray gun, precuring the glass sheet for 3 minutes at 80 ℃, and then spraying 1g of hydrophilic nano particle silicon dioxide dispersion on the epoxy resin coating by the spray gun; and finally, putting the whole coating into an oven at 80 ℃ for curing for 10 min, and taking out to obtain the underwater super-oleophobic coating.
Example two
A method for rapidly preparing an underwater super-oleophobic anticorrosive coating comprises the steps of weighing 8g of F51 epoxy resin and 2g of cardanol modified amine epoxy curing agent, and dissolving the two in 120g of ethyl acetate by ultrasonic mixing and stirring; spraying the mixed solution of epoxy resin and curing agent on a glass sheet by a spray gun, precuring the glass sheet for 3 minutes at 80 ℃, and then spraying 1.5g of hydrophilic nano particle silicon dioxide dispersion on the epoxy resin coating by the spray gun; and finally, putting the whole coating into an oven at 80 ℃ for curing for 10 min, and taking out to obtain the underwater super-oleophobic coating. The contact angle of the underwater oil drop is shown in fig. 1.
EXAMPLE III
A method for rapidly preparing an underwater super-oleophobic anticorrosive coating comprises the steps of weighing 10g of F51 epoxy resin and 3g of cardanol modified amine epoxy curing agent, and dissolving the two in 150g of ethyl acetate by ultrasonic mixing and stirring; spraying the mixed solution of epoxy resin and curing agent on a glass sheet by a spray gun, precuring the glass sheet for 4 minutes at 80 ℃, and then spraying 2g of hydrophilic nano particle silicon dioxide dispersion on the epoxy resin coating by the spray gun; and finally, putting the whole coating into an oven at 80 ℃ for curing for 10 min, and taking out to obtain the underwater super-oleophobic coating.
Example four
A method for rapidly preparing an underwater super-oleophobic anticorrosive coating comprises the steps of weighing 7g of E44 epoxy resin and 2g of cardanol modified amine epoxy curing agent, dissolving the E44 epoxy resin and the cardanol modified amine epoxy curing agent in 100g of ethyl acetate through ultrasonic stirring, spraying a mixed solution of the epoxy resin and the curing agent on a glass sheet through a spray gun, then pre-curing the glass sheet at 90 ℃ for 2-3 minutes, and then spraying 2.0 g of hydrophilic nano particle ferroferric oxide/ethanol dispersion liquid on the epoxy resin coating through the spray gun. Finally, the whole coating is put into an oven with the temperature of 80 ℃ for curing for 10 min and taken out, and the underwater super-oleophobic coating is successfully prepared.
EXAMPLE five
A method for rapidly preparing an underwater super-oleophobic anticorrosive coating comprises the steps of weighing 7-10g of F51 epoxy resin or E44 epoxy resin and 1-3g of cardanol modified amine epoxy curing agent DF1228H, and dissolving the two in 100g of ethyl acetate or ethanol with stirring by ultrasound; spraying the mixed solution of epoxy resin and curing agent on a glass sheet by using a spray gun, precuring the glass sheet for 3 to 4 minutes at the temperature of between 40 and 120 ℃, and then spraying 1 to 2g of hydrophilic nano particle silicon dioxide, montmorillonite, attapulgite, nano kaolin or ferroferric oxide dispersion liquid on an epoxy resin coating by using the spray gun; and finally, putting the whole coating into an oven at 60-130 ℃ for curing for 10 min, and taking out to obtain the underwater super-oleophobic coating.
Claims (6)
1. A method for rapidly preparing an underwater super-oleophobic anticorrosive coating is characterized by comprising the following steps: the preparation method comprises the following steps:
step one, epoxy coating
Mixing 7-10 parts by weight of epoxy resin and 1-3 parts by weight of curing agent, ultrasonically stirring and dissolving in 150 parts by weight of organic solvent, spraying the epoxy solution on a substrate on a heating table, and precuring for 3-4 minutes to form an epoxy coating;
step two, preparation of underwater super oleophobic coating
Spraying 1-2 parts by weight of hydrophilic nanoparticles on the epoxy coating, and curing the epoxy coating in an oven at 60-130 ℃ to prepare the underwater super-oleophobic coating.
2. The method for rapidly preparing the underwater super oleophobic anticorrosive coating according to claim 1, characterized in that: the epoxy resin is E44 epoxy resin or F51 epoxy resin.
3. The method for rapidly preparing the underwater super oleophobic anticorrosive coating according to claim 1, characterized in that: the curing agent is a cardanol modified amine epoxy curing agent DF 1228H.
4. The method for rapidly preparing the underwater super oleophobic anticorrosive coating according to claim 1, characterized in that: the organic solvent is ethyl acetate or ethanol.
5. The method for rapidly preparing the underwater super oleophobic anticorrosive coating according to claim 1, characterized in that: the temperature of the heating table is 40-120 ℃.
6. The method for rapidly preparing the underwater super oleophobic anticorrosive coating according to claim 1, characterized in that: the hydrophilic nano particles are silicon dioxide, montmorillonite, attapulgite, nano kaolin or ferroferric oxide.
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| CN202011074031.3A CN112159117A (en) | 2020-10-10 | 2020-10-10 | Method for rapidly preparing underwater super-oleophobic anticorrosive coating |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113214721A (en) * | 2021-05-13 | 2021-08-06 | 深圳市海石设计工程企业 | Super-hydrophobic surface with stable gas-liquid interface underwater and preparation method thereof |
| CN113462282A (en) * | 2021-07-29 | 2021-10-01 | 武汉科思特仪器股份有限公司 | Marine anticorrosive oil-repellent coating and preparation method thereof |
| CN115254569A (en) * | 2022-07-18 | 2022-11-01 | 哈尔滨工业大学 | Preparation method of shape memory responsive super-wetting coating |
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| CN106189706A (en) * | 2016-08-09 | 2016-12-07 | 河南大学 | A kind of super-hydrophobic resin-coated preparation method |
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|---|---|---|---|---|
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| CN113462282A (en) * | 2021-07-29 | 2021-10-01 | 武汉科思特仪器股份有限公司 | Marine anticorrosive oil-repellent coating and preparation method thereof |
| CN115254569A (en) * | 2022-07-18 | 2022-11-01 | 哈尔滨工业大学 | Preparation method of shape memory responsive super-wetting coating |
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