CN113773746A - High-wear-resistance repairable self-cleaning coating, coating structure and construction method thereof - Google Patents
High-wear-resistance repairable self-cleaning coating, coating structure and construction method thereof Download PDFInfo
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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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/57—Three layers or more the last layer being a clear coat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/57—Three layers or more the last layer being a clear coat
- B05D7/574—Three layers or more the last layer being a clear coat at least some layers being let to dry at least partially before applying the next layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/57—Three layers or more the last layer being a clear coat
- B05D7/576—Three layers or more the last layer being a clear coat each layer being cured, at least partially, separately
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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
- 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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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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
- C08K2201/011—Nanostructured additives
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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
Abstract
The invention discloses a high-wear-resistance repairable self-cleaning coating, a coating structure and a construction method thereof, wherein the coating comprises a solution I, a solution II and a solution III, the solution I consists of putty powder and a solvent I, the solution II consists of polysiloxane and a solvent II, and the solution III consists of nano silicon dioxide, attapulgite, a polysiloxane solution, silicone gum and a solvent III; by manufacturing a microscopic multiple structure of the surface of the material and adding a migratable low-surface-energy substance on the basis, when the super-hydrophobic property of the coating is damaged to a certain degree, the low-surface-energy molecules in the coating are induced to migrate to the surface by high-temperature heating, the surface energy of the coating is reorganized and reduced, the super-hydrophobicity of the coating is recovered, and the surface of the material can have relatively better wear resistance and certain self-repairing capability while the super-hydrophobic property of the surface of the material is realized.
Description
Technical Field
The invention relates to the field of self-cleaning functional coatings, in particular to a high-wear-resistance repairable self-cleaning coating, a coating structure and a construction method thereof.
Background
Superhydrophobic solid surfaces tend to have better self-cleaning properties, which are defined as solid surfaces with a static contact angle of the surface to water of above 150 ° and a sliding contact angle, i.e. the difference between the advancing contact angle and the receding contact angle, of less than 10 °. The current methods for preparing superhydrophobic surfaces are mainly of two types: firstly, the surface free energy of the material is reduced; secondly, the micro roughness of the surface of the material is increased. The existing self-cleaning functional coating has certain wear resistance and self-cleaning property, but does not have self-repairing capability.
Disclosure of Invention
In view of the above, the present invention aims to provide a high wear-resistant repairable self-cleaning coating, a coating structure and a construction method thereof, which can make the surface of a material have relatively good wear resistance and certain self-repairing capability while realizing the super-hydrophobic property of the surface of the material.
The high-wear-resistance repairable self-cleaning coating comprises a solution I, a solution II and a solution III, wherein the solution I consists of putty powder and a solvent I, the solution II consists of polysiloxane and a solvent II, and the solution III consists of nano silicon dioxide, attapulgite, a polysiloxane solution, silicone adhesive and a solvent III;
further, the solvent I is water, and the solvent II and the solvent III are one or a mixture of more than two of absolute ethyl alcohol, acetone, toluene, tetrahydrofuran and ethyl acetate;
further, in the solution I, the mass ratio of water to putty powder is 2: 3-1: 2;
further, the mass ratio of the polysiloxane to the solvent II in the solution II is 1: 4;
further, in the solution III, according to mass percentage, 1.2% of nano silicon dioxide, 6% of attapulgite, 13.1% of polysiloxane solution, 1% of silicone adhesive and 78.7% of solvent III;
furthermore, the nano-silica is one or a mixture of more than two of R106, R202, R812S, R972, R974, LA-R649, LA-R669, TS-530, TS-610 and TS-720 in hydrophobic fumed silica.
The high-wear-resistance repairable self-cleaning coating structure comprises an underlayer, a middle bonding layer and a surface layer, wherein the underlayer is positioned on a substrate, the middle bonding layer is positioned on the underlayer, the surface layer is positioned on the middle bonding layer, the underlayer is coated with a solution I, the middle bonding layer is coated with a solution II, and the surface layer is coated with a solution III;
further, the subbase layer is a coating layer, the middle bonding layer is a spraying layer, and the surface layer is an extraction layer.
The invention also discloses a construction method of the high-wear-resistance repairable self-cleaning coating, which comprises the following steps: a.
dissolving putty powder in a solvent to form a solution I;
b. dissolving polysiloxane in a solvent II to form a solution II;
c. dissolving nano silicon dioxide, attapulgite, polysiloxane solution and silicone adhesive in a solvent III
Forming a solution III;
d. coating the solution I on a substrate, drying at room temperature, spraying the solution II, dipping the solution III after the solvent II is volatilized, and thermally curing at the temperature of 110-140 ℃ for 8-12 hours after the solvent III is volatilized.
The invention has the beneficial effects that: the invention discloses a high-wear-resistance repairable self-cleaning coating, a coating structure and a construction method thereof.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic diagram of the self-cleaning of a superhydrophobic coating of the invention;
FIG. 2 is a graph of the abrasion resistance of the superhydrophobic coating of the invention.
Detailed Description
The high-wear-resistance repairable self-cleaning coating comprises a solution I, a solution II and a solution III, wherein the solution I consists of putty powder and a solvent I, the solution II consists of polysiloxane and a solvent II, and the solution III consists of nano silicon dioxide, attapulgite, a polysiloxane solution, silicone adhesive and a solvent III; the self-cleaning coating is composed of three solutions, wherein each solution forms a coating layer in sequence, and the material surface can have relatively good wear resistance and certain self-repairing capability while the super-hydrophobic property of the material surface is realized by manufacturing a microscopic multiple structure of the material surface and adding a flowable low-surface-energy substance on the basis. The solution I forms a bottom base layer of the coating, the coating formed by the solution II serves as an intermediate bonding layer to enhance the connection strength between the coatings, and the solution III serves as a coating surface layer.
In the embodiment, the solvent I is water, and the solvent II and the solvent III are one or a mixture of more than two of absolute ethyl alcohol, acetone, toluene, tetrahydrofuran and ethyl acetate; and the solvent I, the solvent II and the solvent III are volatilized after the coating is brushed.
In the embodiment, in the solution i, the mass ratio of water to putty powder is 2: 3-1: 2;
in the embodiment, the mass ratio of the polysiloxane to the solvent II in the solution II is 1: 4;
in this embodiment, in the solution iii, by mass, nano-silica 1.2%, attapulgite 6%, polysiloxane solution 13.1%, silicone adhesive 1%, and solvent iii 78.7% are included.
In this embodiment, the nano-silica is one or a mixture of two or more of R106, R202, R812S, R972, R974, LA-R649, LA-R669, TS-530, TS-610, and TS-720 in the hydrophobic fumed silica.
The high-wear-resistance repairable self-cleaning coating structure comprises an underlayer, a middle bonding layer and a surface layer, wherein the underlayer is positioned on a substrate, the middle bonding layer is positioned on the underlayer, the surface layer is positioned on the middle bonding layer, the underlayer is coated with a solution I, the middle bonding layer is coated with a solution II, and the surface layer is coated with a solution III; the material has a self-cleaning effect, meets a self-cleaning contact angle, realizes the super-hydrophobic property of the surface of the material, and enables the surface of the material to have relatively good wear resistance and certain self-repairing capability.
In this embodiment, the base layer is a coating layer, the intermediate bonding layer is a spray coating layer, and the surface layer is an extraction layer. The thickness of the coating is generally 4-5 mm.
The invention also discloses a construction method of the high-wear-resistance repairable self-cleaning coating, which comprises the following steps: a.
dissolving putty powder in a solvent to form a solution I;
b. dissolving polysiloxane in a solvent II to form a solution II;
c. dissolving nano silicon dioxide, attapulgite, polysiloxane solution and silicone adhesive in a solvent III
Forming a solution III;
d. coating the solution I on a substrate, drying at room temperature, spraying the solution II, dipping the solution III after the solvent II is volatilized, and thermally curing at the temperature of 110-140 ℃ for 8-12 hours after the solvent III is volatilized. The method is simple to operate, and plays a certain role in promoting the application of the self-cleaning coating in the aspect of outdoor self-cleaning.
Example one
a. The mass ratio of the water to the powder is 1: 2, fully dissolving putty powder in water to form a solution I;
b. fully dissolving polysiloxane in absolute ethyl alcohol to form a solution II, wherein the mass ratio of the polysiloxane to the absolute ethyl alcohol is 1: 4;
c. fully dissolving nano silicon dioxide R106, attapulgite, polysiloxane solution and silicone adhesive in absolute ethyl alcohol, and stirring for 12 hours to form solution III; according to the mass percentage, the nano silicon dioxide R1061.2%, the attapulgite 6%, the polysiloxane solution 13.1%, the silicone adhesive 1% and the absolute ethyl alcohol 78.7%.
d. And (3) coating the solution I on a substrate, drying at room temperature, spraying the solution II, dipping the solution III after the absolute ethyl alcohol is volatilized, and thermally curing at 130 ℃ for 10 hours after the absolute ethyl alcohol is volatilized.
Example two
a. The mass ratio of the water to the powder is 2: 3, fully dissolving the putty powder in water to form a solution I;
b. fully dissolving polysiloxane in acetone to form a solution II, wherein the mass ratio of the polysiloxane to the acetone is 1: 4;
c. fully dissolving nano silicon dioxide R202, attapulgite, polysiloxane solution and silicone adhesive in acetone to form solution III; according to the mass percentage, the nano silicon dioxide R2021.2%, the attapulgite 6%, the polysiloxane solution 13.1%, the silicone adhesive 1% and the acetone 78.7%.
d. And (3) coating the solution I on a substrate, drying at room temperature, spraying the solution II, dipping the solution III after acetone is volatilized, and thermally curing at 110 ℃ for 8 hours after the acetone is volatilized.
EXAMPLE III
a. The mass ratio of the water to the powder is 1: 2, fully dissolving putty powder in water to form a solution I;
b. fully dissolving polysiloxane in toluene to form a solution II, wherein the mass ratio of the polysiloxane to the toluene is 1: 4;
c. fully dissolving nano silicon dioxide R812, attapulgite, polysiloxane solution and silicone adhesive in toluene to form solution III; according to the mass percentage, the nano silicon dioxide R8121.2%, the attapulgite 6%, the polysiloxane solution 13.1%, the silicone adhesive 1% and the toluene 78.7%.
d. And (3) coating the solution I on a substrate, drying at room temperature, spraying the solution II, dipping the solution III after toluene is volatilized, and thermally curing at 140 ℃ for 12 hours after the toluene is volatilized.
Example four
a. The mass ratio of the water to the powder is 2: 3, fully dissolving the putty powder in water to form a solution I;
b. fully dissolving polysiloxane in tetrahydrofuran to form a solution II, wherein the mass ratio of the polysiloxane to the tetrahydrofuran is 1: 4;
c. fully dissolving nano silicon dioxide R812S, attapulgite, polysiloxane solution and silicone adhesive in tetrahydrofuran to form solution III; according to the mass percentage, the nano silicon dioxide R812S 1.2.2%, the attapulgite 6%, the polysiloxane solution 13.1%, the silicone adhesive 1% and the tetrahydrofuran 78.7%.
d. And (3) coating the solution I on a substrate, drying at room temperature, spraying the solution II, dipping the solution III after tetrahydrofuran is volatilized, and thermally curing at 120 ℃ for 11 hours after the tetrahydrofuran is volatilized.
EXAMPLE five
a. The mass ratio of the water to the powder is 1: 2, fully dissolving putty powder in water to form a solution I;
b. fully dissolving polysiloxane in ethyl acetate to form a solution II, wherein the mass ratio of the polysiloxane to the ethyl acetate is 1: 4;
c. fully dissolving nano silicon dioxide R972, attapulgite, polysiloxane solution and silicone adhesive in ethyl acetate to form solution III; according to the mass percentage, the nano silicon dioxide R9721.2%, the attapulgite 6%, the polysiloxane solution 13.1%, the silicone adhesive 1% and the ethyl acetate 78.7%.
d. And (3) coating the solution I on a substrate, drying at room temperature, spraying the solution II, dipping the solution III after the ethyl acetate is volatilized, and thermally curing at 130 ℃ for 9 hours after the ethyl acetate is volatilized.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (9)
1. A high-wear-resistance repairable self-cleaning coating is characterized in that: the coating comprises a solution I, a solution II and a solution III, wherein the solution I is composed of putty powder and a solvent I, the solution II is composed of polysiloxane and a solvent II, and the solution III is composed of nano silicon dioxide, attapulgite, a polysiloxane solution, silicone adhesive and a solvent III.
2. The high wear resistant repairable self-cleaning coating of claim 1, wherein: the solvent I is water, and the solvent II and the solvent III are one or a mixture of more than two of absolute ethyl alcohol, acetone, toluene, tetrahydrofuran and ethyl acetate.
3. The high wear resistant repairable self-cleaning coating of claim 2, wherein: the mass ratio of the water to the putty powder in the solution I is 2: 3-1: 2.
4. the high wear resistant repairable self-cleaning coating of claim 2, wherein: the mass ratio of the polysiloxane to the solvent II in the solution II is 1: 4.
5. The high wear resistant repairable self-cleaning coating of claim 2, wherein: in the solution III, according to mass percentage, 1.2 percent of nano silicon dioxide, 6 percent of attapulgite, 13.1 percent of polysiloxane solution, 1 percent of silicone adhesive and 78.7 percent of solvent are added.
6. The high wear resistant repairable self-cleaning coating of claim 1, wherein: the nano silicon dioxide is one or the mixture of more than two of R106, R202, R812S, R972, R974, LA-R649, LA-R669, TS-530, TS-610 and TS-720 in hydrophobic gas phase silicon dioxide.
7. A high wear-resisting repairable automatically cleaning coats a structure which characterized in that: the paint comprises a base layer positioned on a substrate, an intermediate bonding layer positioned on the base layer and a surface layer positioned on the intermediate bonding layer, wherein the base layer paint is solution I, the intermediate bonding layer paint is solution II, and the surface layer paint is solution III.
8. The high wear resistant repairable self-cleaning coating structure of claim 7, wherein: the subbase layer is a coating layer, the middle bonding layer is a spraying layer, and the surface layer is an extraction layer.
9. A construction method of a high-wear-resistance repairable self-cleaning coating is characterized by comprising the following steps: the method comprises the following steps:
a. dissolving putty powder in a solvent to form a solution I;
b. dissolving polysiloxane in a solvent II to form a solution II;
c. dissolving nano silicon dioxide, attapulgite, polysiloxane solution and silicone adhesive in a solvent III to form a solution III;
d. coating the solution I on a substrate, drying at room temperature, spraying the solution II, dipping the solution III after the solvent II is volatilized, and thermally curing at the temperature of 110-140 ℃ for 8-12 hours after the solvent III is volatilized.
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| CN114395327A (en) * | 2022-02-25 | 2022-04-26 | 南京亨瑞斯新材料科技有限公司 | Water-based durable super-hydrophobic organic silicon emulsion material and preparation method thereof |
| CN115558349A (en) * | 2022-10-28 | 2023-01-03 | 重庆交通大学 | Self-cleaning composite air purification coating and coating thereof |
| CN115558349B (en) * | 2022-10-28 | 2024-01-19 | 重庆交通大学 | Self-cleaning composite air purification paint and coating thereof |
| CN117210129A (en) * | 2023-10-08 | 2023-12-12 | 佛山市思特四通科技有限公司 | Hydrophobic oleophobic antifouling wear-resistant coating and preparation method thereof |
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