CN109504239B - Preparation method of wear-resistant durable super-hydrophobic coating with kaolin, polytetrafluoroethylene and epoxy resin as raw materials - Google Patents
Preparation method of wear-resistant durable super-hydrophobic coating with kaolin, polytetrafluoroethylene and epoxy resin as raw materials Download PDFInfo
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- CN109504239B CN109504239B CN201811408638.3A CN201811408638A CN109504239B CN 109504239 B CN109504239 B CN 109504239B CN 201811408638 A CN201811408638 A CN 201811408638A CN 109504239 B CN109504239 B CN 109504239B
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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
- C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/18—Homopolymers or copolymers of tetrafluoroethene
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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
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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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
- C08L2312/00—Crosslinking
Abstract
A preparation method of a wear-resistant durable superhydrophobic coating with kaolin, polytetrafluoroethylene and epoxy resin as raw materials comprises the steps of adding the epoxy resin, the kaolin and polytetrafluoroethylene powder into absolute ethyl alcohol, stirring uniformly after ultrasonic treatment, then adding a modifier, stirring uniformly at room temperature, then adding polyamide resin, finally coating on a substrate, drying and curing to obtain the wear-resistant durable superhydrophobic material. The method is simple and easy to realize, does not need harsh reaction conditions and complex reaction equipment, directly uses the kaolin, the polytetrafluoroethylene and the epoxy resin with low cost, can obtain the super-hydrophobic material capable of being sprayed on a large scale through simple operation steps and mild reaction conditions, and has the advantages of no limitation of a substrate, strong environmental adaptability and wear resistance.
Description
Technical Field
The invention belongs to the technical field of preparation of novel hydrophobic materials, and particularly relates to a preparation method of a wear-resistant durable super-hydrophobic coating taking kaolin, polytetrafluoroethylene and epoxy resin as raw materials.
Background
The epoxy resin is a matrix resin which is widely applied, has the advantages of strong adhesive force, strong wear resistance, good insulativity, small size change before and after reaction and the like, and is widely applied to the fields of material bonding, grouting, insulation, corrosion prevention and the like.
Since the super-hydrophobic phenomenon is discovered by people, people always pay attention to the super-hydrophobic phenomenon because of the characteristics of self-cleaning, drag reduction, corrosion prevention, ice coating prevention and the like, and the super-hydrophobic phenomenon has wide application prospects in the fields of coating industry, industrial and agricultural production, national defense and military and the like. At present, research on the preparation of the super-hydrophobic material has achieved abundant research results, and the main preparation methods include a sol-gel method, an etching method, a template method, a self-assembly method, an electrostatic spinning method and the like. Although the methods can prepare the super-hydrophobic material with excellent performance, the methods have the defects of high cost, complex preparation process, poor product environmental adaptability and the like, thereby restricting the industrial practical development of the super-hydrophobic material. Therefore, the research and development of the super-hydrophobic material with low cost, simple preparation process and strong environmental adaptability is the key point for realizing the industrial practicability of the super-hydrophobic material.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a preparation method of wear-resistant durable superhydrophobic coating taking kaolin, polytetrafluoroethylene and epoxy resin as raw materials, the method is simple and easy to implement, does not need harsh reaction conditions and complex reaction equipment, directly uses the kaolin, the polytetrafluoroethylene and the epoxy resin with low cost, can obtain the superhydrophobic material capable of being sprayed on a large scale under mild reaction conditions through simple operation steps, and has the advantages of no limitation of substrates, strong environmental adaptability and wear resistance.
In order to achieve the purpose, the invention adopts the technical scheme that:
a preparation method of wear-resistant durable super-hydrophobic coating taking kaolin, polytetrafluoroethylene and epoxy resin as raw materials comprises the following steps:
adding epoxy resin, kaolin and polytetrafluoroethylene powder into absolute ethyl alcohol, and stirring uniformly after ultrasonic treatment to obtain a mixed emulsion; wherein, the mass ratio of the epoxy resin, the kaolin and the polytetrafluoroethylene is (0.9-1.1): (2.9-3.1): 0.9-1.1);
step two, adding a modifier into the mixed emulsion obtained in the step one under the condition of stirring, and continuously and uniformly stirring at room temperature to obtain a modified milky mixed solution; wherein, the ratio of the kaolin to the modifier is 3 g: 0.2-0.25 mL;
step three, adding polyamide resin into the modified milky mixed solution, and continuously and uniformly stirring at room temperature to obtain a pre-cured mixed emulsion; wherein the mass ratio of the polyamide resin to the epoxy resin is (0.8-1) to 1;
and step four, coating the pre-cured mixed emulsion obtained in the step three on a substrate, and then drying and curing the substrate coated with the mixed emulsion at room temperature to obtain the wear-resistant durable super-hydrophobic material.
In a further improvement of the invention, in the first step, the epoxy resin is E51-618 epoxy resin.
The further improvement of the invention is that in the step one, the power of the ultrasound is 300W, and the time is 5-10 min.
The further improvement of the invention is that in the step one, the rotation speed of stirring is 800-.
The further improvement of the invention is that in the first step, the ratio of the epoxy resin to the absolute ethyl alcohol is 1 g: 8-12 mL.
In a further improvement of the invention, in the second step, the modifier is perfluorodecyl triethoxysilane.
The further improvement of the invention is that in the second step and the third step, the stirring time is 1-2 h.
The invention is further improved in that in the fourth step, the drying and curing time is more than 24 hours.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the super-hydrophobic material is prepared by adopting common kaolin, polytetrafluoroethylene and epoxy resin as raw materials, so that the application field of compounding high polymer materials and inorganic particles is widened, a new field is developed for the development of the super-hydrophobic material, and the wear-resistant durable super-hydrophobic material capable of being sprayed on a large scale is successfully prepared.
2. The invention has simple manufacturing process, mild reaction condition, easy realization and no need of harsh reaction condition and complex reaction equipment.
3. The invention further develops the development of the super-hydrophobic material in practical application, and the wear-resistant durable super-hydrophobic material which can be sprayed in a large scale can be applied to the coating industry, particularly to the fields of building industry, pipeline transportation, wastewater treatment and the like.
4. The contact angle of the super-hydrophobic material prepared by the method can reach 160 degrees, and the contact area of the liquid drop and the coating material is greatly reduced. The polytetrafluoroethylene particles and the kaolin particles modified by the modifier are fully mixed with the epoxy resin and the polyamide resin through high-speed stirring, so that the polytetrafluoroethylene particles and the kaolin particles modified by the modifier are uniformly embedded in a three-dimensional structure formed by crosslinking and curing the epoxy resin and the polyamide resin, and the coating has good mechanical property and super-hydrophobic property and good acid and alkali resistance.
5. The hydrophobic material has not only the advantage of not being limited to a substrate but also the advantage of abrasion resistance durability, while being capable of various coating methods including large-scale spray coating.
Drawings
Fig. 1 is a scanning electron microscope image of the wear-resistant durable superhydrophobic material prepared in example 1 of the invention.
Fig. 2 is a macro-photograph of the abrasion resistant durable superhydrophobic material prepared in example 1 of the invention.
Fig. 3 is a macroscopic photograph of water droplets of the abrasion-resistant durable superhydrophobic material prepared in example 1 of the present invention on a surface.
Fig. 4 is a photograph of a contact angle measuring instrument of water drops of the abrasion-resistant durable superhydrophobic material prepared in example 1 of the present invention on a surface.
FIG. 5 is a scanning electron microscope image of the wear-resistant durable superhydrophobic material prepared in example 2 of the invention.
Fig. 6 is a macro-photograph of the abrasion resistant durable superhydrophobic material prepared in example 2 of the invention.
Fig. 7 is a macroscopic photograph of a water drop of abrasion resistant durable superhydrophobic material prepared in example 2 of the invention standing on a surface.
Fig. 8 is a photograph of a contact angle measuring instrument of water drops of the abrasion-resistant durable superhydrophobic material prepared in example 2 of the present invention on the surface.
Fig. 9 is a graph of abrasion length versus water contact angle for abrasion resistant durable superhydrophobic materials prepared in examples 1 and 2 of the invention.
Fig. 10 is a graph showing the relationship between the contact angle of the superhydrophobic materials prepared in examples 1 and 2 of the invention and water in different acid-base environments.
FIG. 11 is a graph showing the relationship between water contact angles of the superhydrophobic materials prepared in example 1 and example 2 of the invention at different temperatures.
Fig. 12 is a photomicrograph of the abrasion resistant durable superhydrophobic material prepared in example 3 of the invention.
Fig. 13 is a macroscopic photograph of water droplets of the abrasion resistant durable superhydrophobic material prepared in example 3 of the invention on a surface.
Fig. 14 is a macro-photograph of the abrasion resistant durable superhydrophobic material prepared in example 4 of the invention.
Fig. 15 is a macroscopic photograph of water droplets of the abrasion resistant durable superhydrophobic material prepared in example 4 of the invention on a surface.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
The invention comprises the following steps:
step one, adding epoxy resin, polytetrafluoroethylene powder and dried kaolin particles into absolute ethyl alcohol, performing ultrasonic treatment at 300W for 5-10min, and stirring at 1000r/min at 800-; wherein the ratio of the epoxy resin to the absolute ethyl alcohol is 1 g: 8-12 mL. The epoxy resin, the kaolin particles and the polytetrafluoroethylene are mixed according to the mass ratio of (0.9-1.1) to (2.9-3.1) to (0.9-1.1); if not in proportion, for example, an increase in the amount of kaolin used increases the hardness and wear resistance; the use of polytetrafluoroethylene and epoxy for the addition may affect the surface to be too smooth and hydrophobic. The epoxy resin is E51-618 epoxy resin. In the step, firstly, ultrasonic treatment is carried out, and then stirring is carried out, so that the epoxy resin, the polytetrafluoroethylene powder and the kaolin particles are uniformly dispersed in the absolute ethyl alcohol.
Step two, adding a modifier into the mixed emulsion obtained in the step one under the stirring condition, and continuously stirring for 1-2 hours at the room temperature of 800-; wherein, the ratio of the kaolin to the modifier is 3 g: 0.2-0.25 mL; the modifier is perfluorodecyl triethoxysilane.
Step three, adding the polyamide resin into the modified milky mixed solution, and continuously stirring for 1-2 hours at the room temperature of 800-; wherein the mass ratio of the polyamide resin to the epoxy resin is (0.8-1) to 1;
and step four, coating the pre-cured mixed emulsion obtained in the step three on a substrate, and then drying and curing the substrate coated with the mixed emulsion at room temperature for more than 24 hours to obtain the wear-resistant durable super-hydrophobic material. If the drying and curing are carried out for 15 hours, the surface is dried, but the internal crosslinking and curing are complete, so that the hydrophobic property is influenced.
The kaolin and polytetrafluoroethylene powders are both chemically pure.
Example 1
The preparation method of this example includes the following steps:
step one, adding 1g of epoxy resin, 3g of kaolin particles and 1g of polytetrafluoroethylene powder into 10mL of absolute ethyl alcohol, performing ultrasonic dispersion at 300W for 20min, and stirring at room temperature for 2h at 800r/min to obtain a mixed emulsion;
step two, adding 0.2mL of modifier perfluorodecyl triethoxysilane into the mixed emulsion obtained in the step one under the stirring condition, and continuously stirring for 2 hours at room temperature at 800r/min to obtain modified milky mixed liquid;
step three, adding 1g of polyamide resin into the modified milky mixed solution, and continuously stirring for 1h at room temperature at 800r/min to obtain a pre-cured mixed emulsion;
step four, dripping the pre-cured mixed emulsion obtained in the step three on a glass substrate, and then drying and curing the glass substrate coated with the mixed emulsion for 24 hours at room temperature to obtain the wear-resistant durable super-hydrophobic material.
Fig. 1 is a scanning electron microscope image of the wear-resistant durable superhydrophobic material prepared in this embodiment, and as can be seen from fig. 1, kaolin, polytetrafluoroethylene and epoxy resin are polymerized and crosslinked to form a three-dimensional honeycomb skeleton structure, and a micro-nano binary composite structure is formed on the skeleton structure, generally, the micro-nano binary composite coarse structure and a low surface energy substance are considered as two conditions necessary for obtaining the superhydrophobic material, and these characteristics jointly endow the coating with superhydrophobic performance.
Fig. 2 and 3 are macro photographs of the abrasion-resistant durable superhydrophobic material prepared in example 1 of the invention, wherein the superhydrophobic material prepared is white as seen in fig. 2, and water drops on the superhydrophobic surface are spherical as seen in fig. 3.
Fig. 4 shows that the water contact angle of the abrasion-resistant durable superhydrophobic material prepared in example 1 of the present invention is 157 degrees, which indicates that the prepared material is a superhydrophobic material.
Fig. 9 shows the abrasion resistance of the abrasion resistant durable superhydrophobic materials prepared in examples 1 and 2 of the invention, the abrasion resistance test is to put the superhydrophobic material on 600# sandpaper and add 200g of weight for polishing, and it can be seen from fig. 9 that the contact angle of water of the superhydrophobic material prepared is still more than 150 ° after 200cm abrasion.
Fig. 10 and 11 are durability tests of abrasion resistant durable superhydrophobic materials prepared in examples 1 and 2 of the invention, and it can be seen from fig. 10 and 11 that contact angles of two examples of water at different pH and different temperature are still greater than 150 °. The superhydrophobic material prepared in example 1 is durable and weatherable.
Example 2
The preparation method of this example includes the following steps:
step one, adding 1g of epoxy resin, 3g of kaolin particles and 1g of polytetrafluoroethylene powder into 10mL of absolute ethyl alcohol, performing ultrasonic dispersion for 20min at 300W, and stirring for 2h at room temperature of 900r/min to obtain a mixed emulsion;
step two, adding 0.2mL of modifier perfluorodecyl triethoxysilane into the mixed emulsion obtained in the step one under the stirring condition, and continuously stirring for 2 hours at the room temperature of 900r/min to obtain modified milky mixed liquid;
step three, adding 1g of polyamide resin into the modified milky mixed solution, and continuously stirring for 1h at room temperature of 900r/min to obtain a pre-cured mixed emulsion;
and step four, spraying the pre-cured mixed emulsion obtained in the step three on a glass substrate, and then drying and curing the glass substrate coated with the mixed emulsion for 24 hours at room temperature to obtain the wear-resistant durable super-hydrophobic material.
Fig. 5 is a scanning electron microscope image of the wear-resistant durable superhydrophobic material prepared in this embodiment, and as can be seen from fig. 5, kaolin, polytetrafluoroethylene and epoxy resin are polymerized and crosslinked to form a three-dimensional honeycomb skeleton structure, and a micro-nano binary composite structure is formed on the skeleton structure, generally, the micro-nano binary composite coarse structure and a low surface energy substance are considered as two conditions necessary for obtaining the superhydrophobic material, and these characteristics jointly endow the coating with superhydrophobic performance.
Fig. 6 and 7 are macro photographs of the abrasion-resistant durable superhydrophobic material prepared in example 2 of the invention, wherein the superhydrophobic material prepared is white as seen in fig. 6, and water drops on the superhydrophobic surface are spherical as seen in fig. 7.
Fig. 8 shows that the water contact angle of the abrasion-resistant durable superhydrophobic material prepared in example 2 of the present invention is 160 ° by measurement, which indicates that the prepared material is a superhydrophobic material.
Fig. 9 shows the abrasion resistance of the abrasion resistant durable superhydrophobic materials prepared in examples 1 and 2 of the invention, the abrasion resistance test is to put the superhydrophobic material on 600# sandpaper and add 200g of weight for polishing, and it can be seen from fig. 9 that the contact angle of water of the superhydrophobic material prepared is still more than 150 ° after 200cm abrasion.
Fig. 10 and 11 are durability tests of abrasion resistant durable superhydrophobic materials prepared in examples 1 and 2 of the invention, and it can be seen from fig. 10 and 11 that contact angles of two examples of water at different pH and different temperature are still greater than 150 °. It is illustrated that the superhydrophobic materials prepared in example 1 and example 2 both have durability and weather resistance.
Example 3
The preparation method of this example includes the following steps:
step one, adding 1g of epoxy resin, 3g of kaolin particles and 1g of polytetrafluoroethylene powder into 10mL of absolute ethyl alcohol, performing ultrasonic dispersion for 20min at 300W, and stirring for 2h at room temperature of 1000r/min to obtain a mixed emulsion;
step two, adding 0.2mL of modifier perfluorodecyl triethoxysilane into the mixed emulsion obtained in the step one under the stirring condition, and continuously stirring for 2 hours at the room temperature of 1000r/min to obtain modified milky mixed liquid;
step three, adding 1g of polyamide resin into the modified milky mixed solution, and continuously stirring for 1h at room temperature at 1000r/min to obtain a pre-cured mixed emulsion;
step four, dripping the pre-cured mixed emulsion obtained in the step three on a wood substrate, and then drying and curing the wood substrate coated with the mixed emulsion for 24 hours at room temperature to obtain the wear-resistant durable super-hydrophobic material.
Referring to fig. 12 and 13, it can be seen that the prepared superhydrophobic material is white, and water droplets on the superhydrophobic surface appear spherical.
Example 4
The preparation method of this example includes the following steps:
step one, adding 1g of epoxy resin, 3g of kaolin particles and 1g of polytetrafluoroethylene powder into 10mL of absolute ethyl alcohol, performing ultrasonic dispersion for 20min at 300W, and stirring for 2h at room temperature of 1000r/min to obtain a mixed emulsion;
step two, adding 0.2mL of modifier perfluorodecyl triethoxysilane into the mixed emulsion obtained in the step one under the stirring condition, and continuously stirring for 2 hours at the room temperature of 1000r/min to obtain modified milky mixed liquid;
step three, adding 1g of polyamide resin into the modified milky mixed solution, and continuously stirring for 1h at room temperature at 1000r/min to obtain a pre-cured mixed emulsion;
step four, coating the pre-cured mixed emulsion obtained in the step three on a stainless steel tubular substrate by using a dip-coating method, and then drying and curing the stainless steel tubular substrate coated with the mixed emulsion for 24 hours at room temperature to obtain the wear-resistant durable super-hydrophobic material.
Referring to fig. 14 and 15, it can be seen that the prepared superhydrophobic material is white, and water droplets on the superhydrophobic surface appear spherical.
Example 5
Step one, adding epoxy resin, polytetrafluoroethylene powder and dried kaolin particles into absolute ethyl alcohol, performing ultrasonic treatment at 300W for 10min, and stirring at 800r/min for 2h to obtain mixed emulsion; wherein the ratio of the epoxy resin to the absolute ethyl alcohol is 1 g: 8 mL; the epoxy resin, the kaolin particles and the polytetrafluoroethylene are mixed according to the mass ratio of 09:3.1: 0.9;
step two, adding a modifier into the mixed emulsion obtained in the step one under the stirring condition, and continuously stirring for 2 hours at the room temperature at 800r/min to obtain a modified milky mixed solution; wherein, the ratio of the kaolin to the modifier is 3 g: 0.2 mL; the modifier is perfluorodecyl triethoxysilane.
Step three, adding polyamide resin into the modified milky mixed solution, and continuously stirring for 1-2 hours at room temperature at 800r/min to obtain a pre-cured mixed emulsion; wherein the mass ratio of the polyamide resin to the epoxy resin is 0.8: 1;
and step four, coating the pre-cured mixed emulsion obtained in the step three on a substrate, and then drying and curing the substrate coated with the mixed emulsion at room temperature for more than 24 hours to obtain the wear-resistant durable super-hydrophobic material.
Example 6
Step one, adding epoxy resin, polytetrafluoroethylene powder and dried kaolin particles into absolute ethyl alcohol, performing ultrasonic treatment at 300W for 5min, and stirring at 1000r/min for 1h to obtain mixed emulsion; wherein the ratio of the epoxy resin to the absolute ethyl alcohol is 1 g: 12 mL; the epoxy resin, the kaolin particles and the polytetrafluoroethylene are mixed according to the mass ratio of 1.1:2.9: 1.1;
step two, adding a modifier into the mixed emulsion obtained in the step one under the stirring condition, and continuously stirring for 1h at the room temperature under 1000r/min to obtain a modified milky mixed solution; wherein, the ratio of the kaolin to the modifier is 3 g: 0.25 mL; the modifier is perfluorodecyl triethoxysilane.
Step three, adding polyamide resin into the modified milky mixed solution, and continuously stirring for 1-2 hours at room temperature under 1000r/min to obtain a pre-cured mixed emulsion; wherein the mass ratio of the polyamide resin to the epoxy resin is 0.9: 1;
and step four, coating the pre-cured mixed emulsion obtained in the step three on a substrate, and then drying and curing the substrate coated with the mixed emulsion at room temperature for more than 24 hours to obtain the wear-resistant durable super-hydrophobic material.
Claims (4)
1. A preparation method of wear-resistant durable super-hydrophobic coating taking kaolin, polytetrafluoroethylene and epoxy resin as raw materials is characterized by comprising the following steps:
adding epoxy resin, kaolin and polytetrafluoroethylene powder into absolute ethyl alcohol, and stirring uniformly after ultrasonic treatment to obtain a mixed emulsion; wherein, the mass ratio of the epoxy resin, the kaolin and the polytetrafluoroethylene is (0.9-1.1): (2.9-3.1): 0.9-1.1); the epoxy resin is E51-618 epoxy resin; the ratio of epoxy resin to absolute ethyl alcohol is 1 g: 8-12 mL;
step two, adding a modifier into the mixed emulsion obtained in the step one under the condition of stirring, and continuously and uniformly stirring at room temperature to obtain a modified milky mixed solution; wherein, the ratio of the kaolin to the modifier is 3 g: 0.2-0.25 mL; the modifier is perfluorodecyl triethoxysilane;
step three, adding polyamide resin into the modified milky mixed solution, and continuously and uniformly stirring at room temperature to obtain a pre-cured mixed emulsion; wherein the mass ratio of the polyamide resin to the epoxy resin is (0.8-1) to 1;
and step four, coating the pre-cured mixed emulsion obtained in the step three on a substrate, and then drying and curing the substrate coated with the mixed emulsion at room temperature for more than 24 hours to obtain the wear-resistant durable super-hydrophobic material, wherein the contact angle of the super-hydrophobic material can reach 160 degrees, and the super-hydrophobic material has durability and weather resistance.
2. The method for preparing the wear-resistant durable superhydrophobic coating using kaolin, polytetrafluoroethylene and epoxy resin as raw materials according to claim 1, wherein in the first step, the power of ultrasound is 300W, and the time is 5-10 min.
3. The method for preparing the wear-resistant durable superhydrophobic coating with the kaolin, the polytetrafluoroethylene and the epoxy resin as the raw materials as claimed in claim 1, wherein in the step one, the rotation speed of stirring is 800-1000r/min, and the time is 1-2 h.
4. The method for preparing the wear-resistant durable superhydrophobic coating using kaolin, polytetrafluoroethylene and epoxy resin as raw materials according to claim 1, wherein the stirring time in the second step and the third step is 1-2 hours.
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| CN110484067A (en) * | 2019-08-21 | 2019-11-22 | 东南大学 | Super-hydrophobic coat and preparation method with optical absorption characteristics |
| CN110423472B (en) * | 2019-08-22 | 2021-07-30 | 新安天玉有机硅有限公司 | Anti-fouling silicone rubber and preparation method thereof |
| CN112409859B (en) * | 2020-11-19 | 2022-02-18 | 哈尔滨工业大学 | Preparation method of large-area super-hydrophobic coating with adjustable liquid adhesion |
| CN112409861A (en) * | 2020-11-28 | 2021-02-26 | 无锡市科宇橡胶模具厂 | Acid and alkali resistant coating and preparation method and application thereof |
| CN112342790A (en) * | 2020-12-11 | 2021-02-09 | 福州大学 | Construction method of emulsion-separated super-hydrophobic fabric surface |
| CN113600457B (en) * | 2021-07-27 | 2023-02-10 | 东阿阿华医疗科技有限公司 | Method for preparing hydrophobic coating on inner wall of glass capillary tube for thermometer |
| CN116285518A (en) * | 2023-03-30 | 2023-06-23 | 西安赛福斯材料防护有限责任公司 | Preparation method of room-temperature self-curing low-infrared-emissivity superhydrophobic coating |
| CN116891669A (en) * | 2023-07-12 | 2023-10-17 | 中国国检测试控股集团股份有限公司 | Graphite-hydrophobic epoxy resin-based anticorrosive paint and preparation method thereof |
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