CN114133817A - Firm and transparent super-hydrophobic coating and preparation method thereof - Google Patents
Firm and transparent super-hydrophobic coating 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/08—Homopolymers or copolymers of acrylic acid esters
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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
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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
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
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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
- C09D5/002—Priming paints
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- 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
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/67—Particle size smaller than 100 nm
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
Abstract
The invention discloses a firm and transparent super-hydrophobic coating and a preparation method thereof; the super-hydrophobic coating consists of a hydrophobic layer on the top layer and a bonding layer on the bottom layer; wherein the bonding layer comprises polyvinyl alcohol for improving the adhesion of the hydrophobic layer to the substrate; the top layer is a hydrophobic layer and consists of modified nano silicon dioxide with different particle sizes, ethyl acetate and polyacrylate; the nano silicon dioxide particles are subjected to graft modification by using vinyltriethoxysilane, and the hydrolysis and condensation rate of the vinyltriethoxysilane is controlled by adjusting the pH value, so that the grafting rate of the nano silicon dioxide is improved; mixing the modified nano silicon dioxide and polyacrylate in a solvent, heating and stirring to prepare the hydrophobic layer coating, wherein the polyacrylate is used for improving the adhesion among the nano particles and further improving the weather resistance of the nano coarse structure; the firm and transparent super-hydrophobic coating can be widely applied to self-cleaning and dust prevention in the fields of glass curtain walls, photovoltaic modules and the like, is simple in manufacturing process and environment-friendly, and can be used for large-scale industrial production.
Description
Technical Field
The invention belongs to the technical field of preparation of super-hydrophobic materials, and relates to a firm and transparent super-hydrophobic coating and a preparation method thereof.
Background
Biomimetic materials are an important branch of material functionalization design, wherein superhydrophobic materials are closely concerned by researchers due to their unique hydrophobic properties. Initial research on superhydrophobicity came from the "lotus effect" of nature, and the widely accepted definition of superhydrophobicity is static contact angles greater than 150 ° and sliding angles less than 10 °. Due to the hydrophobic property, the super-hydrophobic material is widely applied to the fields of self-cleaning, anti-icing, oil-water separation and the like.
The theoretical basis for superhydrophobicity is a surface wettability model. Through research on the model, two conditions are needed for constructing the super-hydrophobic surface, namely, firstly, the surface is required to have low surface energy, and secondly, a certain rough structure is required. Common methods for constructing the coating with the super-hydrophobic characteristic include an etching modification method, an electrochemical method, a physical and chemical deposition method, a sol-gel method, a self-assembly method and the like. The etching modification method, the electrochemical method, the physical and chemical deposition method are difficult to be used for large-scale and industrial production due to expensive equipment and complex preparation process. The sol-gel method is concerned because of its simple preparation, and application No. CN201510375188.2 utilizes two silicon sources, namely sodium silicate and ethyl orthosilicate, to prepare super-hydrophobic silica powder and super-hydrophobic coating, but does not consider the weather resistance of the coating. The super-hydrophobic coating is constructed by adopting a double-layer structure in the application patent No. 202010632669.8, wherein polyvinyl alcohol is adopted as a bonding layer at a bottom layer, so that the adhesion between a top-layer hydrophobic layer and a substrate is improved, but the bonding strength between a micro-nano structure in the hydrophobic layer and the hydrophobic layer is not considered.
Aiming at the problems, the invention designs a preparation method of a firm and transparent super-hydrophobic coating.
Disclosure of Invention
In view of the above, it is an object of the present invention to provide a robust transparent superhydrophobic coating; the other purpose is to provide a preparation method of a firm and transparent super-hydrophobic coating.
In order to achieve the purpose, the invention adopts the following technical means:
1. a robust transparent superhydrophobic coating comprised of a top hydrophobic layer and a bottom adhesive layer;
the material of the bonding layer comprises 9-11 parts by weight of polyvinyl alcohol;
the hydrophobic layer is made of, by weight, 1-2 parts of large-size modified nano-silica, 3-4 parts of small-size modified nano-silica, 40-50 parts of ethyl acetate and 4-6 parts of polyacrylate;
the large-size modified nano silicon dioxide is obtained by grinding and modifying nano silicon dioxide and vinyl triethoxysilane with the diameter of 25-35nm in ethanol;
the small-size modified nano silicon dioxide is obtained by grinding and modifying nano silicon dioxide with the diameter in the range of 10-25nm and vinyl triethoxysilane in ethanol.
Preferably, the preparation method of the modified nano silicon dioxide comprises the following steps: adding the nano silicon dioxide into 112.5-127.5 parts of ethanol, stirring for 25-35min, adding a mixed solution of 20-30 parts of vinyl triethoxysilane and 37.5-42.5 parts of ethanol, adjusting the pH, stirring for 1.5-2.5h, heating, standing at room temperature, centrifuging, washing, drying, and grinding to obtain the modified nano silicon dioxide.
Preferably, the nano silicon dioxide accounts for 4-5 parts by weight.
Preferably, the pH is from 9.5 to 10.5.
Preferably, the temperature of the temperature rise is 55-65 ℃.
Preferably, the standing time is 30-60 min.
Preferably, the operation of the centrifugation: centrifuging at 1500-2000r/min for 8-12 min.
Preferably, the drying operation: drying at 95-105 deg.C for 8-10 h.
2. A method for preparing the strong transparent super-hydrophobic coating, which comprises the following steps:
(1) heating deionized water, adding polyvinyl alcohol, heating, stirring, standing to obtain a polyvinyl alcohol aqueous solution, coating the polyvinyl alcohol aqueous solution on a substrate, and drying to obtain an adhesive layer on the substrate;
(2) mixing large-size modified nano-silica and small-size modified nano-silica, adding ethyl acetate and polyacrylate, mixing, heating, and stirring to obtain a mixture;
(3) the mixture was coated on the tie layer and dried to give a strong transparent superhydrophobic coating on the substrate.
Preferably, the substrate is hydroxylated glass.
Preferably, in the step (1), the deionized water is 90-100 parts by weight.
Preferably, in step (1), the heating temperature is 55-65 ℃.
Preferably, the temperature of the temperature rise is 85-95 ℃.
Preferably, the drying operation: drying at 75-85 deg.C for 25-35 min.
Preferably, in the step (2), the temperature for raising the temperature is 60-70 ℃.
Preferably, the stirring time is 4-6 h.
Preferably, in the step (3), the drying operation: drying at 75-85 deg.C for 1.5-2 h.
The invention has the beneficial effects that:
1. the invention provides a firm and transparent super-hydrophobic coating which is composed of a hydrophobic layer on the top layer and a bonding layer on the bottom layer. The material of the hydrophobic layer comprises large-size modified nano-silica, small-size modified nano-silica, ethyl acetate and polyacrylate; the material of the bonding layer comprises polyvinyl alcohol; the material of the substrate comprises a glass sheet. Firstly, the traditional method utilizes nano-silica to construct a super-hydrophobic coating with a micro-nano structure, wherein the nano-silica is modified by a compound containing fluorine, and the compound containing fluorine has great environmental pollution; secondly, according to the traditional method, the nano silicon dioxide with single grain diameter is used for constructing the super-hydrophobic coating of the micro-nano structure, the generated super-hydrophobic coating has high roughness and can affect light transmittance, nano particles with diameters within the range of 25-35nm and 10-25nm are selected for constructing the micro-nano structure, and the balance between hydrophobicity and light transmittance can be realized by selecting the combination of the nano silicon dioxide with different grain diameters or adjusting the proportion of the two nano silicon dioxide, so that the super-hydrophobic coating with high light transmittance is constructed. Finally, the traditional method for constructing the super-hydrophobic coating with the micro-nano structure by using the nano silicon dioxide has the problem of weather resistance, which is mainly reflected in the bonding strength between the hydrophobic layer and the substrate and between the nano silicon dioxide for constructing the micro-nano structure and the super-hydrophobic coating. The modified nano silicon dioxide in the hydrophobic layer is connected into a whole by polyacrylate, so that the adhesion between the nano silicon dioxide and the super-hydrophobic coating is improved. Thereby improving the weatherability of the superhydrophobic coating.
2. The invention provides a preparation method of a firm and transparent super-hydrophobic coating, which has the advantages of simple preparation process, environmental protection and reasonable process design, improves the weather resistance of the super-hydrophobic coating, and has higher light transmittance which can reach 90 percent. The self-cleaning glass curtain wall can be used for realizing self-cleaning on the surface of a photovoltaic assembly or the surface of a glass curtain wall.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a flow chart of example 1 for preparing a robust transparent superhydrophobic coating on a substrate;
FIG. 2 is a schematic structural diagram of examples 1, 2 and 3 for preparing a robust transparent superhydrophobic coating on a substrate;
FIG. 3 is a graph of optical contact angle detector test results for examples 1 and 2, wherein (a) in FIG. 3 is a graph of optical contact angle detector test results for example 1, and (b) in FIG. 3 is a graph of optical contact angle detector test results for example 2, wherein a solid transparent superhydrophobic coating is prepared on a substrate;
fig. 4 is a graph showing the results of measuring light transmittance of the hard and transparent superhydrophobic coatings prepared on the substrates according to examples 1 and 2, wherein (a) in fig. 4 is a graph showing the results of measuring light transmittance of the hard and transparent superhydrophobic coating prepared on the substrate according to example 1, and (b) in fig. 4 is a graph showing the results of measuring light transmittance of the hard and transparent superhydrophobic coating prepared on the substrate according to example 2.
Detailed Description
The following description of the embodiments of the present invention is provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Example 1
A strong and transparent super-hydrophobic coating is prepared, and a preparation flow chart is shown in figure 1, and the preparation method comprises the following steps:
(1) heating 90 parts of deionized water to 55 ℃, adding 9 parts of polyvinyl alcohol, heating to 85 ℃, uniformly stirring, standing and defoaming to obtain a polyvinyl alcohol aqueous solution;
(2) respectively adding 4 parts of nano silicon dioxide with the diameter within the range of 25-35nm and 4 parts of nano silicon dioxide with the diameter within the range of 10-20nm into 112.5 parts of ethanol, stirring for 25min, respectively adding a mixed solution of 20 parts of vinyltriethoxysilane and 37.5 parts of ethanol, adjusting the pH value to 9.5, stirring for 1.5h, heating to 55 ℃, standing for 30min at room temperature, centrifuging for 8min at 1500r/min, washing, drying for 8h at 95 ℃, and grinding to obtain modified nano silicon dioxide;
(3) mixing 1 part of large-size modified nano silicon dioxide and 3 parts of small-size modified nano silicon dioxide, adding 40 parts of ethyl acetate and 4 parts of polyacrylate, mixing, heating to 60 ℃, and stirring for 4 hours to obtain a mixture;
(4) and (2) coating the polyvinyl alcohol aqueous solution obtained in the step (1) on a substrate, drying at 75 ℃ for 25min to obtain an adhesive layer on the substrate, coating the mixture obtained in the step (3) on the adhesive layer, and drying at 75 ℃ for 25min to obtain a firm and transparent super-hydrophobic coating on the substrate.
Example 2
Preparing a strong and transparent super-hydrophobic coating, comprising the following steps:
(1) heating 100 parts of deionized water to 65 ℃, adding 11 parts of polyvinyl alcohol, heating to 95 ℃, uniformly stirring, standing and defoaming to obtain a polyvinyl alcohol aqueous solution;
(2) adding 5 parts of nano-silica with the diameter within the range of 25-35nm and 5 parts of nano-silica with the diameter within the range of 15-25nm into 127.5 parts of ethanol respectively, stirring for 35min, adding a mixed solution of 30 parts of vinyltriethoxysilane and 42.5 parts of ethanol respectively, adjusting the pH value to 10.5, stirring for 2.5h, heating to 65 ℃, standing for 60min at room temperature, centrifuging for 8-12min at 2000r/min, washing, drying for 8-10h at 95-105 ℃, and grinding to obtain modified nano-silica;
(3) mixing 2 parts of large-size modified nano silicon dioxide and 4 parts of small-size modified nano silicon dioxide, adding 50 parts of ethyl acetate and 6 parts of polyacrylate, mixing, heating to 70 ℃, and stirring for 6 hours to obtain a mixture;
(4) and (2) coating the polyvinyl alcohol aqueous solution obtained in the step (1) on a substrate, drying at 85 ℃ for 35min to obtain an adhesive layer on the substrate, coating the mixture obtained in the step (3) on the adhesive layer, and drying at 85 ℃ for 35min to obtain a firm and transparent super-hydrophobic coating on the substrate.
Example 3
Preparing a strong and transparent super-hydrophobic coating, comprising the following steps:
(1) heating 95 parts of deionized water to 60 ℃, adding 10 parts of polyvinyl alcohol, heating to 90 ℃, uniformly stirring, standing and defoaming to obtain a polyvinyl alcohol aqueous solution;
(2) respectively adding 4 parts of nano-silica with the diameter within the range of 25-35nm and 4 parts of nano-silica with the diameter within the range of 10-20nm into 120.5 parts of ethanol, stirring for 30min, respectively adding a mixed solution of 25 parts of vinyltriethoxysilane and 40.5 parts of ethanol, adjusting the pH value to 10, stirring for 2h, heating to 60 ℃, standing for 45min at room temperature, centrifuging for 10min at 1750r/min, washing, drying for 9h at 100 ℃, and grinding to obtain modified nano-silica;
(3) mixing 1.5 parts of large-size modified nano silicon dioxide and 3.5 parts of small-size modified nano silicon dioxide, adding 45 parts of ethyl acetate and 5 parts of polyacrylate, mixing, heating to 65 ℃, and stirring for 5 hours to obtain a mixture;
(4) and (2) coating the polyvinyl alcohol aqueous solution obtained in the step (1) on a substrate, drying at 80 ℃ for 30min to obtain an adhesive layer on the substrate, coating the mixture obtained in the step (3) on the adhesive layer, and drying at 80 ℃ for 30min to obtain a firm and transparent super-hydrophobic coating on the substrate.
Test results and analysis
Fig. 2 is a schematic structural diagram of examples 1, 2 and 3 for preparing a robust transparent superhydrophobic coating on a substrate.
Fig. 3 is a graph showing the results of optical contact angle detector tests on the substrate of examples 1 and 2, wherein (a) in fig. 3 is a graph showing the results of optical contact angle detector tests on the substrate of example 1, and (b) in fig. 3 is a graph showing the results of optical contact angle detector tests on the substrate of example 2.
Fig. 4 is a graph showing the results of measuring light transmittance of the hard and transparent superhydrophobic coatings prepared on the substrates according to examples 1 and 2, wherein (a) in fig. 4 is a graph showing the results of measuring light transmittance of the hard and transparent superhydrophobic coating prepared on the substrate according to example 1, and (b) in fig. 4 is a graph showing the results of measuring light transmittance of the hard and transparent superhydrophobic coating prepared on the substrate according to example 2.
As can be seen from fig. 3, (a) in fig. 3 is that the contact angle of the hard transparent super-hydrophobic coating prepared on the substrate in example 1 is 155 °, and (b) in fig. 3 is that the contact angle of the hard transparent super-hydrophobic coating prepared on the substrate in example 2 is 159 °, and the hard transparent super-hydrophobic coatings prepared on the substrates in examples 1 and 2 meet the super-hydrophobic requirement, and the hydrophobic effect of the coatings can be changed by changing the combination of nano-silica with different particle sizes.
As can be seen from fig. 4, fig. 4 (a) is a graph showing the transmittance test results of the hard and transparent superhydrophobic coating layer prepared on the substrate in example 1, and fig. 4 (b) is a graph showing the transmittance test results of the hard and transparent superhydrophobic coating layer prepared on the substrate in example 2, the transmittance of the hard and transparent superhydrophobic coating layer prepared on the substrate in example 1 is better than that of example 2, because the roughness and the transmittance of the hard and transparent superhydrophobic coating layer are in negative correlation and the hydrophobic effect are in positive correlation.
In summary, the following steps: 1. the invention provides a firm and transparent super-hydrophobic coating which is composed of a hydrophobic layer on the top layer and a bonding layer on the bottom layer. The material of the hydrophobic layer comprises large-size modified nano-silica, small-size modified nano-silica, ethyl acetate and polyacrylate; the material of the bonding layer comprises polyvinyl alcohol; the material of the substrate comprises a glass sheet. Firstly, the traditional method utilizes nano-silica to construct a super-hydrophobic coating with a micro-nano structure, wherein the nano-silica is modified by a compound containing fluorine, and the compound containing fluorine has great environmental pollution; secondly, according to the traditional method, the nano silicon dioxide with single grain diameter is used for constructing the super-hydrophobic coating of the micro-nano structure, the generated super-hydrophobic coating has high roughness and can affect light transmittance, nano particles with diameters within the range of 25-35nm and 10-25nm are selected for constructing the micro-nano structure, and the balance between hydrophobicity and light transmittance can be realized by selecting the combination of the nano silicon dioxide with different grain diameters or adjusting the proportion of the two nano silicon dioxide, so that the super-hydrophobic coating with high light transmittance is constructed. Finally, the traditional method for constructing the super-hydrophobic coating with the micro-nano structure by using the nano silicon dioxide has the problem of weather resistance, which is mainly reflected in the bonding strength between the hydrophobic layer and the substrate and between the nano silicon dioxide for constructing the micro-nano structure and the super-hydrophobic coating. The modified nano silicon dioxide in the hydrophobic layer is connected into a whole by polyacrylate, so that the adhesion between the nano silicon dioxide and the super-hydrophobic coating is improved. Thereby improving the weatherability of the superhydrophobic coating.
2. The invention provides a preparation method of a firm and transparent super-hydrophobic coating, which has the advantages of simple preparation process, environmental protection and reasonable process design, improves the weather resistance of the super-hydrophobic coating, and has higher light transmittance which can reach 90 percent. The self-cleaning glass curtain wall can be used for realizing self-cleaning on the surface of a photovoltaic assembly or the surface of a glass curtain wall.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (9)
1. A robust transparent superhydrophobic coating characterized by: the super-hydrophobic coating consists of a hydrophobic layer on the top layer and a bonding layer on the bottom layer;
the material of the bonding layer comprises 9-11 parts by weight of polyvinyl alcohol;
the hydrophobic layer is made of, by weight, 1-2 parts of large-size modified nano-silica, 3-4 parts of small-size modified nano-silica, 40-50 parts of ethyl acetate and 4-6 parts of polyacrylate;
the large-size modified nano silicon dioxide is obtained by grinding and modifying nano silicon dioxide and vinyl triethoxysilane with the diameter of 25-35nm in ethanol;
the small-size modified nano silicon dioxide is obtained by grinding and modifying nano silicon dioxide with the diameter in the range of 10-25nm and vinyl triethoxysilane in ethanol.
2. The robust transparent superhydrophobic coating of claim 1, wherein: the preparation method of the modified nano silicon dioxide comprises the following steps: adding the nano silicon dioxide into 112.5-127.5 parts of ethanol, stirring for 25-35min, adding a mixed solution of 20-30 parts of vinyl triethoxysilane and 37.5-42.5 parts of ethanol, adjusting the pH, stirring for 1.5-2.5h, heating, standing at room temperature, centrifuging, washing, drying, and grinding to obtain the modified nano silicon dioxide.
3. The robust transparent superhydrophobic coating of claim 2, wherein: 4-5 parts of nano silicon dioxide;
the pH value is 9.5-10.5;
the temperature for raising the temperature is 55-65 ℃;
the standing time is 30-60 min;
operation of the centrifugation: centrifuging at 1500-;
and (3) drying: drying at 95-105 deg.C for 8-10 h.
4. A method of preparing a robust transparent superhydrophobic coating according to any of claims 1-3, characterized in that: the method comprises the following steps:
(1) heating deionized water, adding polyvinyl alcohol, heating, stirring, standing to obtain a polyvinyl alcohol aqueous solution, coating the polyvinyl alcohol aqueous solution on a substrate, and drying to obtain an adhesive layer on the substrate;
(2) mixing large-size modified nano-silica and small-size modified nano-silica, adding ethyl acetate and polyacrylate, mixing, heating, and stirring to obtain a mixture;
(3) the mixture was coated on the tie layer and dried to give a strong transparent superhydrophobic coating on the substrate.
5. The robust transparent superhydrophobic coating of claim 4, wherein: the substrate is hydroxylated glass.
6. The method of claim 4, wherein: in the step (1), 90-100 parts by weight of deionized water is added.
7. The method of claim 4, wherein: in the step (1), the heating temperature is 55-65 ℃;
the temperature for raising the temperature is 85-95 ℃;
and (3) drying: drying at 75-85 deg.C for 25-35 min.
8. The method of claim 4, wherein: in the step (2), the temperature rise is 60-70 ℃;
the stirring time is 4-6 h.
9. The method of claim 4, wherein: in the step (3), the drying operation: drying at 75-85 deg.C for 1.5-2 h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643626A (en) * | 2022-04-22 | 2022-06-21 | 南京林业大学 | Preparation method and application of transparent poplar with super-hydrophobic property |
| CN116023691A (en) * | 2022-08-18 | 2023-04-28 | 平湖市浙江工业大学新材料研究院 | Preparation method of hydrophobic acrylate coating |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584028A (en) * | 2012-02-01 | 2012-07-18 | 奇瑞汽车股份有限公司 | Modified nano SiO2 sol, preparation method for modified nano SiO2 sol and application method of modified nano SiO2 sol on automobile glass |
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2021
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584028A (en) * | 2012-02-01 | 2012-07-18 | 奇瑞汽车股份有限公司 | Modified nano SiO2 sol, preparation method for modified nano SiO2 sol and application method of modified nano SiO2 sol on automobile glass |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643626A (en) * | 2022-04-22 | 2022-06-21 | 南京林业大学 | Preparation method and application of transparent poplar with super-hydrophobic property |
| CN114643626B (en) * | 2022-04-22 | 2023-10-27 | 南京林业大学 | Preparation method and application of transparent poplar with superhydrophobic performance |
| CN116023691A (en) * | 2022-08-18 | 2023-04-28 | 平湖市浙江工业大学新材料研究院 | Preparation method of hydrophobic acrylate coating |
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