CN111961411A - Preparation of super-hydrophobic coating with excellent self-repairing and anti-corrosion properties - Google Patents
Preparation of super-hydrophobic coating with excellent self-repairing and anti-corrosion properties Download PDFInfo
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Abstract
The invention discloses a preparation method of a super-hydrophobic coating with excellent self-repairing and anti-corrosion properties, which comprises the following steps: taking SiO2、TiO2Uniformly dispersing the mixture in a mixed solution of absolute ethyl alcohol and ammonia water, ultrasonically stirring, quickly adding tetraethyl silicate and heptadecafluorotriethoxysilane perfluorooctanoate into the solution, reacting, adding a coupling agent into the system, and stirring to obtain a solution with super-hydrophobic property; spraying the prepared super-hydrophobic solution on a substrate, and curing to obtain the super-hydrophobic coating with excellent performance, wherein in the step one, the super-hydrophobic solution is divided intoSiO dispersed in absolute ethyl alcohol and ammonia water2And TiO2Is a nanoparticle. The preparation of the super-hydrophobic coating with excellent self-repairing and anti-corrosion properties can enable the coating to have excellent anti-corrosion properties, can obviously delay the metal corrosion rate, has excellent mechanical properties such as friction resistance and the like, realizes quick self-repairing of the coating, realizes the super-hydrophobic properties, and has low cost and simple production process.
Description
Technical Field
The invention relates to the technical field of super-hydrophobic coatings, in particular to a preparation method of a super-hydrophobic coating with excellent self-repairing and anti-corrosion properties.
Background
The metal material has good physical property, chemical property, mechanical property and excellent processing property, and has great effects on the aspects of construction, transportation, mechanical manufacturing and the like, national defense, aerospace, advanced technology and the like, but the metal can react with the environment medium in which the metal is positioned in the using process to cause corrosion in different degrees, so that great loss is brought to national economy, according to survey statistics, the metal lost due to corrosion accounts for 20-40% of the metal output all year around the world every year, and the economic loss caused by metal corrosion exceeds 3000 billions every year in China.
In addition, metal corrosion causes waste of resources and environmental pollution, and even hinders the development of advanced science, such as airship Apollo, because of its fuel N2O2Contains a trace amount of O2Therefore, the high-pressure container cannot be normally used due to stress corrosion, the lunar landing plan is further influenced, the influence of metal corrosion needs to be considered in the research and development of various novel materials, and higher requirements are provided for the research of the metal corrosion, so that the high-pressure container has important social significance for deeply researching the metal corrosion resistance, and plays a positive role in improving the national economy.
Except some mechanical factors such as impact and the like or physical factors such as heat and the like, most of the corrosion reactions of metals and the surrounding environment are spontaneous and have universality; the corrosion speed can be effectively slowed down by preventing the metal from contacting with the surrounding environment, and the corrosion prevention of the coating is an economic and effective metal protection method, which can not only prevent the metal from contacting with the surrounding environment, but also has the characteristics of wide adaptability and the like and has greater practicability; however, the existing coating has certain water permeability and air permeability, and more importantly, the speed of permeating water and oxygen is far higher than the speed of consuming water and oxygen by metal corrosion, so that the coating cannot play a complete shielding role, and therefore, researchers develop a large amount of novel anticorrosive coatings or special coatings, such as polypyrazol, polyaniline anticorrosive coatings, super-hydrophobic anticorrosive coatings and the like. However, the preparation of coatings such as polypyrazole, polyaniline and the like faces the problems of complex production process, expensive raw materials and the like, and for the super-hydrophobic coating with a special coarse structure, the contact area between a corrosion medium and metal can be reduced by virtue of advantages such as an air layer and the like, so that a great deal of research is obtained, but the acting force of a general hydrophobic film and the metal is very weak, so that the requirement on the mechanical strength of the coating in industrial application cannot be met, or after the coating is placed in the corrosion medium for a period of time, the super-hydrophobic performance is weakened, so that the requirement on corrosion resistance of the metal cannot be met, and therefore, the preparation of the super-hydrophobic coating with long-term stability and excellent mechanical stability has important significance in metal corrosion.
Disclosure of Invention
The invention mainly aims to provide a preparation method of a super-hydrophobic coating with excellent self-repairing and anti-corrosion performances, so that the coating has excellent anti-corrosion performance, can obviously delay the corrosion rate of metal and has excellent anti-corrosion effect; the coating has excellent mechanical properties such as friction resistance and the like, has excellent self-repairing performance, can realize quick self-repairing of the coating and realize super-hydrophobic performance, can form a chemical bond with hydroxyl on the surface of metal by utilizing siloxane, improves the acting force between the super-hydrophobic coating and the metal, ensures that the coating has more stable anti-corrosion performance, ensures that the coating has excellent self-repairing performance by adding a small amount of fluorine-containing chains, can realize the recovery of lyophobic property of the coating at a certain temperature after being worn, more importantly, has low price of raw materials of the coating and simple production process, and lays a solid foundation for researching the anti-corrosion of the metal.
In order to achieve the purpose, the invention adopts the technical scheme that:
the preparation method of the super-hydrophobic coating with excellent self-repairing and anti-corrosion properties comprises the following specific steps:
the method comprises the following steps: taking SiO2、TiO2Uniformly dispersing the mixture in a mixed solution of absolute ethyl alcohol and ammonia water, and ultrasonically stirring to obtain a solution I;
step two: and quickly adding tetraethyl silicate and heptadecafluorotriethoxysilane perfluorooctanoate into the first solution to react to obtain a mixed solution system.
Step three: adding a coupling agent into the mixed solution system, and stirring to obtain a solution with super-hydrophobic property;
and step four, spraying the prepared super-hydrophobic solution on a substrate, and curing to obtain the super-hydrophobic coating with excellent performance.
Further, in the step one, SiO dispersed in absolute ethyl alcohol and ammonia water2And TiO2Is nano particles, SiO dispersed in absolute ethyl alcohol and ammonia water2And TiO2The particle diameter ratio of (a) to (b) is preferably 1: 10.
Further, in the step one, the ratio of the absolute ethyl alcohol to the ammonia water is 5: 1; SiO 22The proportion of the anhydrous ethanol to the ammonia water is as follows: per 0.1g SiO2Dispersing in 30 ml absolute ethyl alcohol and 6ml ammonia water, TiO2The proportion of the anhydrous ethanol to the ammonia water is as follows: per 0.1g TiO2Dispersed in 30 ml of absolute ethyl alcohol and 6ml of ammonia water.
Further, in the second step, the first solution is SiO-containing2And TiO2Uniformly dispersing the mixture in a mixed solution of absolute ethyl alcohol and ammonia water, wherein in the second step, the volume ratio of tetraethyl silicate to heptadecafluorotriethoxysilane perfluorooctanoate is 1: 1.
Further, in the second step, the ratio of tetraethyl silicate to heptadecafluorotriethoxysilane perfluorooctanoate is: to one portion of solution one was added 0.3ml of tetraethyl silicate and 0.3ml of heptadecafluorotriethoxysilane perfluorooctanoate.
Further, in the third step, the coupling agent is 3- (2-aminoethylamino) propyl trimethoxy silane.
Further, in step three, to one part of the mixed solution system solution, 0.6ml of 3- (2-aminoethylamino) propyltrimethoxysilane was added.
Further, one portion of solution one was prepared by taking 0.1g of 15nmSiO2Nanoparticle 0.1g 150 nm TiO2Nano particleUniformly dispersing the seeds in a mixed solution of 30 ml of absolute ethyl alcohol and 6ml of ammonia water, and performing ultrasonic stirring for 30min to obtain the product; one part of the mixed solution system solution is prepared by quickly adding 0.3ml of tetraethyl silicate and 0.3ml of heptadecafluorotriethoxysilane perfluorooctanoate into one part of the solution I and reacting for 5 hours at 60 ℃; one part of the solution with super-hydrophobic property is prepared by adding 0.6ml of 3- (2-aminoethylamino) propyl trimethoxy silane into one part of the mixed solution system solution and stirring for 2 h.
Further, in the fourth step, a solution with super-hydrophobic property was sprayed at a distance of 15 cm from the substrate at 0.4kpa, and after spraying, curing was carried out for 5 hours at 60 ℃.
Furthermore, the super-hydrophobic coating with excellent self-repairing and anti-corrosion properties is prepared by any one of the preparation methods.
According to the preparation method of the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances, the prepared coating is within the protection range of the application by adopting the preparation method of the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances in the steps one to four, and in a specific implementation mode, the corrosion resistance of a blank magnesium-aluminum alloy and the corrosion resistance of the magnesium-aluminum alloy sprayed with the super-hydrophobic coating are evaluated through an electrochemical workstation CHI660D test respectively in the preparation method of the super-hydrophobic coating; the mechanical stability of the super-hydrophobic coating is tested by using abrasive paper friction, and the self-repairing capability of the coating is tested at different temperatures.
As a better technical scheme: SiO in the step one2Nanoparticles and TiO2The proportions of the nano particles, the absolute ethyl alcohol and the ammonia water are respectively as follows: SiO 22Nano particles 0.1g, TiO20.1g of nano particles, 30 ml of absolute ethyl alcohol and 6ml of ammonia water, wherein in the step one, SiO is added2Nanoparticles and TiO2The proportion of the nano particles, the absolute ethyl alcohol and the ammonia water is as follows: 0.1g 15nm SiO2Nanoparticles, 0.1g of 150 nm TiO2The volume of the nano particles and the absolute ethyl alcohol is 30 ml, and the volume of the ammonia water is 6 ml.
As a better technical scheme, in the first step, ultrasonic stirring is carried out for 30min, and in the second step, tetraethyl silicate and heptadecafluorotriethoxysilane perfluorooctanoate are quickly added into the solution and reacted for 5h at 60 ℃; and in the third step, stirring for 2 hours to obtain the solution with super-hydrophobic property.
As a better technical solution, the preparation of the solution with super-hydrophobic property: 0.1g of 15nm SiO2Nanoparticle 0.1g 150 nm TiO2Uniformly dispersing nano particles in 30 ml of absolute ethyl alcohol and 6ml of mixed solution, carrying out ultrasonic stirring for 30min, quickly adding 0.3ml of tetraethyl silicate and 0.3ml of heptadecafluorotriethoxysilane perfluorooctanoate into the solution, reacting for 5h at 60 ℃, adding 0.6ml of 3- (2-aminoethylamino) propyltrimethoxysilane into the system, and stirring for 2h to obtain the solution with super-hydrophobic property.
As a better technical scheme, the prepared super-hydrophobic solution is uniformly sprayed at a position which is 15 cm away from a substrate by 0.4kpa, and is cured for 5 hours in a 60 ℃ oven, so that the super-hydrophobic coating with excellent performance can be obtained.
Compared with the prior art, the super-hydrophobic coating with excellent self-repairing and anti-corrosion properties has excellent anti-corrosion properties, can obviously delay the metal corrosion rate, has excellent anti-corrosion effects, has excellent mechanical properties such as friction resistance and the like, has excellent self-repairing properties, can realize quick self-repairing of the coating and super-hydrophobic properties at the temperature of 80 ℃, and has the advantages of low cost, simple production process and the like.
The parts not involved in the scheme are the same as or can be realized by the prior art.
Drawings
FIG. 1 is a schematic diagram of an electrochemical test for the preparation of a super-hydrophobic coating with excellent self-repairing and anti-corrosion properties according to the present invention.
FIG. 2 is a Tafel polarization curve diagram of magnesium-aluminum alloy sprayed with a single-sided super-hydrophobic coating and sprayed with a double-sided super-hydrophobic coating prepared from the blank magnesium-aluminum alloy with the excellent self-repairing and anti-corrosion performance.
FIG. 3 is a graph showing the corrosion resistance stability test results of a white magnesium aluminum alloy prepared by using the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances and a magnesium aluminum alloy coated with the super-hydrophobic coating.
FIG. 4 is a schematic diagram of mechanical stability of a sandpaper friction pair super-hydrophobic coating prepared from the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances.
FIG. 5 is a schematic diagram of the self-repairing capability of a coating prepared from the super-hydrophobic coating with excellent self-repairing and anti-corrosion properties at different temperatures.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The preparation method of the super-hydrophobic coating with excellent self-repairing and anti-corrosion properties comprises the following specific steps:
the method comprises the following steps: taking SiO2、TiO2Uniformly dispersing in a mixed solution of absolute ethyl alcohol and ammonia water, and ultrasonically stirring;
step two: and (3) quickly adding tetraethyl silicate and heptadecafluorotriethoxysilane perfluorooctanoate into the solution for reaction.
Step three: adding a coupling agent into the system, and stirring to obtain a solution with super-hydrophobic property;
and step four, spraying the prepared super-hydrophobic solution on a substrate, and curing to obtain the super-hydrophobic coating with excellent performance.
In the first step, SiO dispersed in absolute ethyl alcohol and ammonia water2And TiO2Is nano particles, SiO dispersed in absolute ethyl alcohol and ammonia water2And TiO2Is preferably in a particle diameter ratio of1:10。
In the first step, the ratio of the absolute ethyl alcohol to the ammonia water is 5: 1; SiO 22The proportion of the anhydrous ethanol to the ammonia water is as follows: per 0.1g SiO2Dispersing in 30 ml absolute ethyl alcohol and 6ml ammonia water respectively, TiO2The proportion of the anhydrous ethanol to the ammonia water is as follows: per 0.1g TiO2Dispersed in 30 ml of absolute ethyl alcohol and 6ml of ammonia water respectively.
In the second step, the solution contains SiO2And TiO2Uniformly dispersing the mixture in a mixed solution of absolute ethyl alcohol and ammonia water, wherein in the second step, the volume ratio of tetraethyl silicate to heptadecafluorotriethoxysilane perfluorooctanoate is 1: 1.
In the second step, the proportion of tetraethyl silicate to heptadecafluorotriethoxysilane perfluorooctanoate is as follows: to one portion of the solution was added 0.3ml of tetraethyl silicate and 0.3ml of heptadecafluorotriethoxysilane perfluorooctanoate.
In the third step, the coupling agent is 3- (2-aminoethylamino) propyl trimethoxy silane.
In step three, 0.6ml of 3- (2-aminoethylamino) propyltrimethoxysilane was added to one part of the system solution.
One part of the solution is 0.1g of 15nmSiO2Nanoparticle 0.1g 150 nm TiO2Uniformly dispersing the nanoparticles in a mixed solution of 30 ml of absolute ethyl alcohol and 6ml of ammonia water, and performing ultrasonic stirring for 30min to obtain the nano-particles; one part of the system solution is obtained by quickly adding 0.3ml of tetraethyl silicate and 0.3ml of heptadecafluorotriethoxysilane perfluorooctanoate into one part of the solution and reacting for 5 hours at 60 ℃; one part of the super-hydrophobic solution is obtained by adding 0.6ml of 3- (2-aminoethylamino) propyl trimethoxy silane into one part of the system solution and stirring for 2 h.
In the fourth step, the super-hydrophobic solution is sprayed at a distance of 15 cm from the substrate by 0.4kpa, and after spraying, the mixture is cured for 5 hours at 60 ℃.
As shown in fig. 1, a schematic of the electrochemical test, where the counter electrode: in the project, the carbon rod is high-purity; reference electrode: in this case a saturated calomel electrode; a working electrode: in the item, whether the magnesium-aluminum alloy is coated or not; 3.5wt% sodium chloride solution was used as the electrolyte.
We evaluated the corrosion resistance of the blank magnesium aluminum alloy and the magnesium aluminum alloy sprayed with the super-hydrophobic coating by the electrochemical workstation CHI660D test in 3.5wt% NaCl aqueous solution as shown in figure one; the tafel corrosion curve is one of the standards for measuring the corrosion resistance of metals, in the curve, the abscissa is the self-corrosion potential, the lower the value is, the higher the corresponding corrosion possibility is, and the ordinate is the corrosion current, which is a measure of the corrosion rate, the larger the value is, the larger the corrosion rate is.
The blank magnesium-aluminum alloy, the magnesium-aluminum alloy sprayed with the single-sided super-hydrophobic coating and the Tafel polarization curve of the magnesium-aluminum alloy sprayed with the double-sided super-hydrophobic coating are shown in figure 2, and it can be seen from the figure that the corrosion potential of the blank magnesium-aluminum alloy is-1.5V, and the corrosion current is about 7.43 multiplied by 10 < -8 > A.cm < -2 >, and after the super-hydrophobic coating is sprayed, the increase of the corrosion potential and the decrease of the corrosion current can be seen obviously, and the corrosion resistance of the double-sided spraying is much better than that of the single-sided spraying; the corrosion potential can reach-1.1V, the corrosion current can reach 1.051 multiplied by 10 < -12 > A cm < -2 >, and the corrosion rate of the magnesium-aluminum alloy is obviously reduced.
FIG. 2 is a Tafel polarization curve of blank magnesium-aluminum alloy, sprayed with a single-sided super-hydrophobic coating and sprayed with a double-sided super-hydrophobic coating.
Fig. 3 shows the corrosion resistance stability test results of the blank magnesium-aluminum alloy and the magnesium-aluminum alloy coated with the super-hydrophobic coating.
Researchers find that after the super-hydrophobic coating is placed in a corrosive medium for a period of time, the super-hydrophobic performance is obviously reduced, so that the requirement of metal corrosion resistance cannot be met; it is therefore also essential to investigate the stability of the coating.
As shown in fig. 3, in the tafel polarization curve in the figure, after the blank magnesium-aluminum alloy is soaked in saline water for five days, the corrosion potential of the blank magnesium-aluminum alloy is obviously reduced, and the corrosion current is increased, which indicates that the metal is less corrosion-resistant, and after the magnesium-aluminum alloy coated with the double-layer super-hydrophobic coating is soaked for ten days, the corrosion potential is still much greater than the corrosion potential of the blank magnesium-aluminum alloy, and the corrosion current is much smaller than the corrosion current of the blank magnesium-aluminum alloy, which shows excellent corrosion-resistant effect and good stability.
Example two
As shown in fig. 4, mechanical stability of the coating is one of the criteria for determining whether the coating can be applied in large-scale industry, we use 600cw sandpaper to test the mechanical stability of the coating, spray the coating on the magnalium, flip the coated side of the coating on the sandpaper, load 200g weight on the sandpaper, drag the magnalium, and test the lyophobicity of the coating by using contact angle and sliding angle;
and spraying the coating on the magnesium-aluminum alloy, and reversely buckling one surface of the coating on 600cw sand paper, wherein a weight of 200g is loaded on the magnesium-aluminum alloy, CA is a contact angle, and SA is a sliding angle.
Test 1: when the dragging distance is 0cm, the contact angle is 165-170 degrees, and the sliding angle is 2.5-5 degrees.
And (3) testing 2: when the dragging distance is 20cm, the contact angle is 170 degrees, and the sliding angle is 2.5-5 degrees.
And (3) testing: when the dragging distance is 40cm, the contact angle is between 165 and 170 degrees, and the sliding angle is between 2.5 and 5 degrees.
And (4) testing: when the dragging distance is 60cm, the contact angle is 165 degrees, and the sliding angle is 2.5-5 degrees.
And (5) testing: when the dragging distance is 80cm, the contact angle is between 165 and 170 degrees, and the sliding angle is between 2.5 and 5 degrees.
And 6, testing: when the dragging distance is 100cm, the contact angle is 160-165 degrees, and the sliding angle is 2.5-5 degrees.
And 7, testing: when the dragging distance is 120cm, the contact angle is between 165 and 170 degrees, and the sliding angle is between 2.5 and 5 degrees.
And (4) testing 8: when the dragging distance is 140cm, the contact angle is between 165 and 170 degrees, and the sliding angle is between 2.5 and 5 degrees.
And (3) testing: when the dragging distance is 160cm, the contact angle is 165-170 degrees, and the sliding angle is 2.5-5 degrees.
Test 10: when the dragging distance is 180cm, the contact angle is 160-165 degrees, and the sliding angle is 2.5-5 degrees.
Test 11: when the dragging distance is 200cm, the contact angle is 160-165 degrees, and the sliding angle is 5 degrees.
Test 12: when the dragging distance is 220cm, the contact angle is 160-165 degrees, and the sliding angle is 5-10 degrees.
Test 13: when the dragging distance is 240cm, the contact angle is 160 degrees, and the sliding angle is between 5 and 10 degrees.
The magnalium is coated, the dragging distance of a weight with 200g loaded at the upper end can be seen from the data of a contact angle and a sliding angle of 0-240cm, the coating has excellent mechanical stability, the super-hydrophobic effect can be still realized after the weight is dragged for 240cm on sand paper, and a road is laid for large-scale industrial application of the super-hydrophobic coating.
EXAMPLE III
The coating has self-repairing performance, and after long-time abrasion, the self-repairing performance of the coating can be realized by utilizing the surface migration of a fluorine-containing chain, so that the coating can have stable super-hydrophobic capability;
FIG. 5 test data: the self-repairing time is within 0-1 hour, and the contact angle reaches 110 degrees in an environment with water at 80 ℃; the contact angle is 70-80 degrees under the environment of water at 60 ℃;
the self-repairing time is within 2 hours, and the contact angle is between 160 and 170 degrees in the environment of water at the temperature of 80 ℃; under the environment of water at 60 ℃, the contact angle is between 100 and 110 degrees; the contact angle is between 80 and 90 degrees in the environment of water at 25 ℃.
The self-repairing time is within 3 hours, and the contact angle reaches 160-170 degrees in the environment of water at 80 ℃; under the environment of water at 60 ℃, the contact angle reaches 120-130 ℃; the contact angle reaches between 90 and 100 degrees in the environment of water at 25 ℃.
The self-repairing time is within 4 hours, and the contact angle reaches 160-170 degrees in the environment of water at 80 ℃; under the environment of water at 60 ℃, the contact angle reaches between 150 and 160 degrees; the contact angle reaches between 110 and 120 degrees in the environment of water at 25 ℃.
The self-repairing time is within 5 hours, and the contact angle reaches 160-170 degrees in the environment of water at 80 ℃; under the environment of water at 60 ℃, the contact angle reaches 160-170 ℃; the contact angle reaches 120-130 degrees in the environment of water at 25 ℃.
The self-repairing time is within 12 hours, and the contact angle reaches 160 degrees in a water environment at 25 ℃.
As shown in fig. 5, it can be seen that at 25 ℃, the restoring ability of the coating is weak, and it takes more than 12 hours to achieve the self-repairing of the super-hydrophobic ability, whereas at 80 ℃, the restoring ability of the coating is strong, and it only takes 2 hours to achieve the super-hydrophobic property of the coating.
The invention provides a preparation method of a super-hydrophobic coating with excellent self-repairing and anti-corrosion properties, and the method can show that the coating has excellent anti-corrosion properties, can obviously delay the corrosion rate of metal and has excellent anti-corrosion effect.
The coating has excellent mechanical properties such as friction resistance and the like, more particularly, the coating has excellent self-repairing performance, can realize quick self-repairing of the coating and super-hydrophobic performance at the temperature of 80 ℃, has the advantages of low cost, simple production process and the like, can realize large-scale industrial application of the coating, and lays a solid foundation for researching metal protection.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The preparation method of the super-hydrophobic coating with excellent self-repairing and anti-corrosion properties is characterized by comprising the following steps of: the method comprises the following specific steps:
the method comprises the following steps: taking SiO2、TiO2Uniformly dispersing in the mixed solution of absolute ethyl alcohol and ammonia waterIn the process, ultrasonic stirring is carried out to obtain a solution I;
step two: quickly adding tetraethyl silicate and heptadecafluorotriethoxysilane perfluorooctanoate into the first solution to react to obtain a mixed solution system;
step three: adding a coupling agent into the mixed solution system, and stirring to obtain a solution with super-hydrophobic property;
and step four, spraying the prepared super-hydrophobic solution on a substrate, and curing to obtain the super-hydrophobic coating with excellent performance.
2. The preparation method of the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances as claimed in claim 1, is characterized in that: in the first step, SiO dispersed in absolute ethyl alcohol and ammonia water2And TiO2Is nano particles, SiO dispersed in absolute ethyl alcohol and ammonia water2And TiO2The particle diameter ratio of (a) to (b) is preferably 1: 10.
3. The preparation of the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances according to claim 1, is characterized in that: in the first step, the ratio of the absolute ethyl alcohol to the ammonia water is 5: 1; SiO 22The proportion of the anhydrous ethanol to the ammonia water is as follows: per 0.1g SiO2Dispersing in 30 ml absolute ethyl alcohol and 6ml ammonia water, TiO2The proportion of the anhydrous ethanol to the ammonia water is as follows: per 0.1g TiO2Dispersed in 30 ml of absolute ethyl alcohol and 6ml of ammonia water.
4. The preparation of the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances according to claim 1, is characterized in that: in the second step, the first solution is SiO-containing2And TiO2Uniformly dispersing the mixture in a mixed solution of absolute ethyl alcohol and ammonia water, wherein in the second step, the volume ratio of tetraethyl silicate to heptadecafluorotriethoxysilane perfluorooctanoate is 1: 1.
5. The preparation method of the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances according to claim 4, is characterized in that: in the second step, the proportion of tetraethyl silicate to heptadecafluorotriethoxysilane perfluorooctanoate is as follows: to one portion of solution one was added 0.3ml of tetraethyl silicate and 0.3ml of heptadecafluorotriethoxysilane perfluorooctanoate.
6. The preparation of the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances according to claim 1, is characterized in that: in the third step, the coupling agent is 3- (2-aminoethylamino) propyl trimethoxy silane.
7. The preparation of the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances according to claim 1, is characterized in that: in the third step, 0.6ml of 3- (2-aminoethylamino) propyltrimethoxysilane was added to one part of the mixed solution system solution.
8. The preparation of the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances according to claim 1, is characterized in that: one part of solution one is prepared by taking 0.1g of 15nmSiO2Nanoparticle 0.1g 150 nm TiO2Uniformly dispersing the nano particles in a mixed solution of 30 ml of absolute ethyl alcohol and 6ml of ammonia water, and performing ultrasonic stirring for 30min to obtain the nano particles; one part of the mixed solution system solution is prepared by quickly adding 0.3ml of tetraethyl silicate and 0.3ml of heptadecafluorotriethoxysilane perfluorooctanoate into one part of the solution I and reacting for 5 hours at 60 ℃; one part of the solution with super-hydrophobic property is prepared by adding 0.6ml of 3- (2-aminoethylamino) propyl trimethoxy silane into one part of the mixed solution system solution and stirring for 2 h.
9. The preparation of the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances according to claim 1, is characterized in that: in the fourth step, the solution with super-hydrophobic property is sprayed at the position of 0.4kpa 15 cm away from the substrate, and after spraying, the solution needs to be cured for 5 hours at 60 ℃.
10. The preparation of the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances according to the claims 1 to 9, is characterized in that: the super-hydrophobic coating with excellent self-repairing and anti-corrosion performances is prepared by any one of the preparation methods.
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