CN112175430A - Preparation method of copper myristate super-hydrophobic coating - Google Patents
Preparation method of copper myristate super-hydrophobic coating Download PDFInfo
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- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
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Abstract
The invention discloses a preparation method of a copper myristate super-hydrophobic coating, which comprises the steps of preparing a mixed solution of ferric nitrate and zinc nitrate, putting a magnesium alloy substrate into the mixed solution, taking out the magnesium alloy substrate after a layer of reddish brown substance is generated, and drying the magnesium alloy substrate; then fully cleaning the mixture by using distilled water, and drying the mixture again; mixing myristic acid, copper nitrate and absolute ethyl alcohol, and stirring to prepare a soaking solution; soaking a magnesium alloy sheet into the soaking solution for reaction, taking out the magnesium alloy sheet, and drying to obtain the copper myristate super-hydrophobic coating, wherein the hydrophobic angle of the copper myristate super-hydrophobic coating prepared by the method reaches 162.396 degrees; aiming at the defect that the AZ31B magnesium alloy is easy to corrode, a corrosion-resistant surface and a relatively stable super-hydrophobic surface are constructed on an AZ31B magnesium alloy substrate through a chemical oxidation method and a solution soaking method, so that the corrosion-resistant surface can isolate the contact between a corrosion medium and a magnesium alloy super-hydrophobic film layer, the corrosion resistance of the magnesium alloy is improved, and the method has certain significance in material application.
Description
Technical Field
The invention belongs to the technical field of new materials, and particularly relates to a preparation method of a copper myristate super-hydrophobic coating.
Background
The research of hydrophobic materials has become an important development direction of scientific research in recent years. Because of the special surface property, the hydrophobic surface material has huge development prospects in basic theory research, national defense equipment, industrial and agricultural production and daily life, and especially has huge application prospects in the fields of self-cleaning, pipeline transportation, low friction and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the technical problem to be solved by the invention is to provide a preparation method of a copper myristate superhydrophobic coating, wherein the prepared copper myristate superhydrophobic coating has a hydrophobic angle of 162.396 degrees, and aims at the defect that AZ31B magnesium alloy is easy to corrode, a corrosion-resistant surface and a relatively stable superhydrophobic surface are constructed on an AZ31B magnesium alloy substrate by combining a chemical oxidation method and a solution soaking method, so that the contact between a corrosion medium and a magnesium alloy superhydrophobic film layer can be isolated, the corrosion resistance of the magnesium alloy is improved, and the preparation method has certain significance in material application.
The invention adopts the following technical scheme:
a preparation method of a copper myristate super-hydrophobic coating comprises the following steps:
s1, preparing a mixed solution of ferric nitrate and zinc nitrate, putting the magnesium alloy substrate into the mixed solution, taking out the magnesium alloy substrate after a layer of reddish brown substance is generated, and drying the magnesium alloy substrate; then, fully cleaning the mixture by using distilled water, and then drying the mixture again;
s2, mixing myristic acid, copper nitrate and absolute ethyl alcohol, and stirring to prepare a soaking solution;
s3, soaking the magnesium alloy sheet prepared in the step S1 in the soaking solution prepared in the step S2 for reaction, taking out the magnesium alloy sheet, and drying to obtain the copper myristate superhydrophobic coating.
Specifically, in step S1, the magnesium alloy substrate is polished to make the surface smooth and flat and remove the oxide film and the pits, and then is fully cleaned with distilled water and dried.
Specifically, in step S1, the ratio of the ferric nitrate solution to the zinc nitrate solution is 1: 1 to prepare a mixed solution, reacting for 15min, taking out and drying after a layer of reddish brown substance is generated; then, fully cleaning the mixture for 3-5 times by using distilled water, and finally drying the mixture.
Further, the concentration of the ferric nitrate solution was 8.08g/L, and the concentration of the zinc nitrate solution was 5.95 g/L.
Specifically, in step S2, myristic acid: copper nitrate: the volume ratio of the absolute ethyl alcohol is 30: (3-13): 800.
specifically, in step S2, the stirring time is 30 minutes, and the stirring speed is 100-200 rpm.
Further, after the stirring was completed, the mixture was sealed and left standing for 12 hours or more.
Specifically, in step S3, the soaking time is 1 hour, and the blue substance is taken out after a layer of blue substance is formed on the surface.
Specifically, in step S3, the soaked magnesium alloy sheet is placed into a constant temperature drying oven to be dried, the temperature is controlled at 100 ℃ for 1 hour, and after the temperature is reduced to room temperature after drying, the copper myristate superhydrophobic coating is prepared, and the cooling time is 6-10 hours.
Compared with the prior art, the invention has at least the following beneficial effects:
the invention relates to a preparation method of a copper myristate super-hydrophobic coating, which comprises the steps of preparing a mixed solution of ferric nitrate and zinc nitrate, putting a magnesium alloy substrate into the mixed solution, taking out the magnesium alloy substrate after a layer of reddish brown substance is generated, and drying the magnesium alloy substrate; then fully cleaning the mixture by using distilled water, and drying the mixture again; mixing myristic acid, copper nitrate and absolute ethyl alcohol, and stirring to prepare a soaking solution; and soaking the prepared magnesium alloy sheet into the soaking solution for reaction, taking out the magnesium alloy sheet, and drying the magnesium alloy sheet to obtain the copper myristate super-hydrophobic coating. The steps are simple and clear, the use cost is low, and the method can be conveniently utilized.
Further, the AZ31B magnesium alloy substrate was subjected to a polishing process to make the surface smooth and flat and preliminarily remove the oxide film and pits. The corrosion resistance of the surface of the magnesium alloy can be researched.
Further, mixing the ferric nitrate solution and the zinc nitrate solution according to the ratio of 1: 1 to prepare a mixed solution. The corrosion resistance of the surface of the magnesium alloy after pretreatment can be researched.
Further, the concentration of the ferric nitrate solution was 8.08g/L, and the concentration of the zinc nitrate solution was 5.95 g/L. The magnesium alloy was sufficiently pretreated in order to investigate its properties.
Further, myristic acid: copper nitrate: the volume ratio of the absolute ethyl alcohol is 30: (3-13): 800, a layer of super-hydrophobic film can be completely generated on the surface of the magnesium alloy, and multiple groups of experiments are carried out so as to research better hydrophobicity.
Further, the stirring time is 30 minutes, and the stirring speed is between 100 and 200 revolutions per minute, so that the solution can be fully reacted.
Further, after completion of the stirring, the reaction solution was sealed and allowed to stand for 12 hours or more to precipitate.
Further, taking out the magnesium alloy after the soaking time is 1 hour, and enabling the magnesium alloy to fully react until a blue super-hydrophobic film is formed on the surface of the magnesium alloy.
Further, the soaked magnesium alloy sheet is placed into a constant-temperature drying oven for drying treatment, the temperature is controlled to be 100 ℃, the time is 1 hour, the formation of a hydrophobic coating is accelerated, and the cooling time is 6 to 10 hours, so that the superhydrophobic film on the surface of the magnesium alloy is firmer.
In conclusion, the corrosion-resistant coating and the super-hydrophobic coating are formed on the surface of the magnesium alloy, so that corrosive substances are not in direct contact with the magnesium alloy substrate, and the corrosion resistance of the magnesium alloy is further improved.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic view of a magnesium alloy material at a drainage angle;
FIG. 2 is a SEM image of a substrate;
FIG. 3 is a corresponding surface topography of the substrate of FIG. 2, wherein (a) is a 290 SEM image and (b) is a 1000 SEM image.
Detailed Description
The invention relates to a preparation method of a copper myristate super-hydrophobic coating, which comprises the following steps:
s1, magnesium alloy surface pretreatment;
firstly, pretreating a magnesium alloy substrate, and then placing the magnesium alloy substrate in a mixed solution of ferric nitrate and zinc nitrate for reaction at room temperature; taking out the red brown substance after a layer of red brown substance is generated, and drying the red brown substance; then, the coating is fully cleaned by distilled water, and after the coating and impurities which are not firm are washed away, the coating is dried again.
Firstly, polishing a magnesium alloy substrate, physically polishing the surface of the magnesium alloy substrate by using 1500# silicon carbide abrasive paper to ensure that the surface is smooth and flat, preliminarily removing an oxide film and pits, and then fully cleaning and drying by using distilled water.
In the mixed solution, the concentration of the ferric nitrate solution is 8.08g/L, the concentration of the zinc nitrate solution is 5.95g/L, and the ferric nitrate solution and the zinc nitrate solution are mixed according to the proportion of 1: 1 to prepare a mixed solution.
The reaction time of the magnesium alloy substrate in the mild solution is 15min, and the magnesium alloy substrate is taken out and dried after a layer of reddish brown substance is generated. Then, the coating is fully cleaned by distilled water, the coating and impurities which are not firm are washed away, and finally, the drying is carried out.
S2, preparing a copper myristate super-hydrophobic coating;
mixing myristic acid, copper nitrate and absolute ethyl alcohol according to a certain proportion, and stirring to prepare a soaking solution, wherein the myristic acid: copper nitrate: the volume ratio of the absolute ethyl alcohol is 30: (3-13): 800;
respectively weighing myristic acid and copper nitrate by using an electronic balance, putting the myristic acid and the copper nitrate into a beaker with the volume of 100ml, adding 80ml ethanol,
stirring for 30 minutes by using a multi-head magnetic stirrer at a stirring speed of 100-200 revolutions per minute.
And after stirring, sealing and standing for more than 12 hours by using a preservative film for later use.
S3, coating and baking.
And (5) soaking the magnesium alloy sheet prepared in the step S1 into the soaking solution prepared in the step S2 for reaction, taking out the magnesium alloy sheet and drying the magnesium alloy sheet to obtain the copper myristate super-hydrophobic coating.
The soaking time is 1 hour, and the blue substance is taken out after a layer of blue substance is generated on the surface of the blue substance.
Preferably, in order to accelerate the formation of the hydrophobic coating, the soaked magnesium alloy sheet is placed into a constant-temperature drying oven to be dried at the temperature of 100 ℃ for 1 hour, and the temperature is reduced to room temperature after drying, wherein the temperature reduction time is 6 to 10 hours.
The copper myristate hydrophobic coating prepared by the method has a good hydrophobic effect, 5 positions are randomly selected on the surface of the substrate, and a 5 mu L water drop is used for testing and averaging. When the content of the copper nitrate is 80%, the static contact angle can reach the maximum value of 162.396 degrees, and the rolling angle is less than 7 degrees, so that super-hydrophobicity is achieved. The magnesium alloy super-hydrophobic surface is of a hierarchical coarse structure consisting of micron-sized clusters and vertical-bar-shaped micron sheets, and the random vertical-bar-shaped micron sheets are about 0.5 mu m in thickness and about 20 mu m in length.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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 1
(when the ratio of copper nitrate was 65%, the mass of myristic acid was 2.674g, the mass of copper nitrate was 0.538g, and 80ml of absolute ethanol was taken.)
S1, firstly, polishing a magnesium alloy substrate (the surface of the magnesium alloy sheet is physically polished by 1500# silicon carbide abrasive paper to make the surface smooth and flat, an oxide film and pits are preliminarily removed, then, the magnesium alloy sheet is fully cleaned by distilled water and dried), and then, the magnesium alloy sheet is placed in a mixed solution of ferric nitrate and zinc nitrate to react at room temperature (the concentration of the ferric nitrate solution is 8.08g/L, the concentration of the zinc nitrate solution is 5.95g/L, the ferric nitrate solution and the zinc nitrate solution are mixed according to the proportion of 1: 1 to prepare a mixed solution, and the reaction time is 15 min); taking out after a layer of reddish brown substance is generated, and drying (drying in a constant-temperature drying box at 100 ℃ for 1 hour); then fully cleaning the coating by using distilled water (3 to 5 times), washing loose coatings and impurities, and drying the coating again; (constant temperature oven drying, temperature 100 ℃, time 30 minutes)
S2, mixing and stirring myristic acid, copper nitrate and absolute ethyl alcohol (80 ml of absolute ethyl alcohol, 2.674g of myristic acid and 0.538g of copper nitrate) to prepare a soaking solution; stirring by using a multi-head magnetic stirrer (stirring for about 30 minutes) at a stirring speed of between 100 and 200 revolutions per minute, and sealing and standing by using a preservative film (standing for more than 12 hours) for later use after stirring is finished;
s3, soaking the magnesium alloy sheet prepared in the step S1 in the soaking solution prepared in the step S2 for reaction (after 1 hour of soaking), taking out and drying to obtain the copper myristate super-hydrophobic coating.
The prepared copper myristate super-hydrophobic coating has a hydrophobic angle of 135-140 degrees.
Example 2
(when the proportion of copper nitrate is 70%, the mass of myristic acid is 2.674g, the mass of copper nitrate is 0.676g, and 80ml of absolute ethyl alcohol is taken.)
S1, firstly, polishing a magnesium alloy substrate (the surface of the magnesium alloy sheet is physically polished by 1500# silicon carbide abrasive paper to make the surface smooth and flat, an oxide film and pits are preliminarily removed, then, the magnesium alloy sheet is fully cleaned by distilled water and dried), and then, the magnesium alloy sheet is placed in a mixed solution of ferric nitrate and zinc nitrate to react at room temperature (the concentration of the ferric nitrate solution is 8.08g/L, the concentration of the zinc nitrate solution is 5.95g/L, the ferric nitrate solution and the zinc nitrate solution are mixed according to the proportion of 1: 1 to prepare a mixed solution, and the reaction time is 15 min); taking out after a layer of reddish brown substance is generated, and drying (drying in a constant-temperature drying box at 100 ℃ for 1 hour); then fully cleaning the coating by using distilled water (3 to 5 times), washing loose coatings and impurities, and drying the coating again; (constant temperature oven drying, temperature 100 ℃, time 30 minutes)
S2, mixing and stirring myristic acid, copper nitrate and absolute ethyl alcohol (80 ml of absolute ethyl alcohol, 2.674g of myristic acid and 0.676g of copper nitrate) to prepare a soaking solution; stirring by using a multi-head magnetic stirrer (stirring for about 30 minutes) at a stirring speed of between 100 and 200 revolutions per minute, and sealing and standing by using a preservative film (standing for more than 12 hours) for later use after stirring is finished;
s3, soaking the magnesium alloy sheet prepared in the step S1 in the soaking solution prepared in the step S2 for reaction (after 1 hour of soaking), taking out and drying to obtain the copper myristate super-hydrophobic coating.
The prepared copper myristate super-hydrophobic coating has a hydrophobic angle of 150.4 degrees.
Example 3
(when the ratio of copper nitrate was 75%, the mass of myristic acid was 2.674g, the mass of copper nitrate was 0.870g, and 80ml of absolute ethanol was used.)
S1, firstly, polishing a magnesium alloy substrate (the surface of the magnesium alloy sheet is physically polished by 1500# silicon carbide abrasive paper to make the surface smooth and flat, an oxide film and pits are preliminarily removed, then, the magnesium alloy sheet is fully cleaned by distilled water and dried), and then, the magnesium alloy sheet is placed in a mixed solution of ferric nitrate and zinc nitrate to react at room temperature (the concentration of the ferric nitrate solution is 8.08g/L, the concentration of the zinc nitrate solution is 5.95g/L, the ferric nitrate solution and the zinc nitrate solution are mixed according to the proportion of 1: 1 to prepare a mixed solution, and the reaction time is 15 min); taking out after a layer of reddish brown substance is generated, and drying (drying in a constant-temperature drying box at 100 ℃ for 1 hour); then fully cleaning the coating by using distilled water (3 to 5 times), washing loose coatings and impurities, and drying the coating again; (constant temperature oven drying, temperature 100 ℃, time 30 minutes)
S2, mixing and stirring myristic acid, copper nitrate and absolute ethyl alcohol (80 ml of absolute ethyl alcohol, 2.674g of myristic acid and 0.870g of copper nitrate) to prepare a soaking solution; stirring by using a multi-head magnetic stirrer (stirring for about 30 minutes) at a stirring speed of between 100 and 200 revolutions per minute, and sealing and standing by using a preservative film (standing for more than 12 hours) for later use after stirring is finished;
s3, soaking the magnesium alloy sheet prepared in the step S1 in the soaking solution prepared in the step S2 for reaction (after 1 hour of soaking), taking out and drying to obtain the copper myristate super-hydrophobic coating.
The prepared copper myristate super-hydrophobic coating has a hydrophobic angle of 158.4 degrees.
Example 4
(when the copper nitrate accounts for 80%, the weight of the myristic acid is 2.674g, the weight of the copper nitrate is 1.160g, and 80ml of absolute ethyl alcohol is taken.)
S1, firstly, polishing a magnesium alloy substrate (the surface of the magnesium alloy sheet is physically polished by 1500# silicon carbide abrasive paper to make the surface smooth and flat, an oxide film and pits are preliminarily removed, then, the magnesium alloy sheet is fully cleaned by distilled water and dried), and then, the magnesium alloy sheet is placed in a mixed solution of ferric nitrate and zinc nitrate to react at room temperature (the concentration of the ferric nitrate solution is 8.08g/L, the concentration of the zinc nitrate solution is 5.95g/L, the ferric nitrate solution and the zinc nitrate solution are mixed according to the proportion of 1: 1 to prepare a mixed solution, and the reaction time is 15 min); taking out after a layer of reddish brown substance is generated, and drying (drying in a constant-temperature drying box at 100 ℃ for 1 hour); then fully cleaning the coating by using distilled water (3 to 5 times), washing loose coatings and impurities, and drying the coating again; (constant temperature oven drying, temperature 100 ℃, time 30 minutes)
S2, mixing and stirring myristic acid, copper nitrate and absolute ethyl alcohol (80 ml of absolute ethyl alcohol, 2.674g of myristic acid and 1.160g of copper nitrate) to prepare a soaking solution; stirring by using a multi-head magnetic stirrer (stirring for about 30 minutes) at a stirring speed of between 100 and 200 revolutions per minute, and sealing and standing by using a preservative film (standing for more than 12 hours) for later use after stirring is finished;
s3, soaking the magnesium alloy sheet prepared in the step S1 in the soaking solution prepared in the step S2 for reaction (after 1 hour of soaking), taking out and drying to obtain the copper myristate super-hydrophobic coating.
The prepared copper myristate super-hydrophobic coating has a hydrophobic angle of 162.396 degrees.
Example 5
(when the proportion of copper nitrate was 85%, the mass of myristic acid was 2.674g, the mass of copper nitrate was 1.643g, and 80ml of absolute ethanol was used.)
S1, firstly, polishing a magnesium alloy substrate (the surface of the magnesium alloy sheet is physically polished by 1500# silicon carbide abrasive paper to make the surface smooth and flat, an oxide film and pits are preliminarily removed, then, the magnesium alloy sheet is fully cleaned by distilled water and dried), and then, the magnesium alloy sheet is placed in a mixed solution of ferric nitrate and zinc nitrate to react at room temperature (the concentration of the ferric nitrate solution is 8.08g/L, the concentration of the zinc nitrate solution is 5.95g/L, the ferric nitrate solution and the zinc nitrate solution are mixed according to the proportion of 1: 1 to prepare a mixed solution, and the reaction time is 15 min); taking out after a layer of reddish brown substance is generated, and drying (drying in a constant-temperature drying box at 100 ℃ for 1 hour); then fully cleaning the coating by using distilled water (3 to 5 times), washing loose coatings and impurities, and drying the coating again; (constant temperature oven drying, temperature 100 ℃, time 30 minutes)
S2, mixing and stirring myristic acid, copper nitrate and absolute ethyl alcohol to prepare a soaking solution (80 ml of absolute ethyl alcohol, 2.674g of myristic acid and 1.643g of copper nitrate are taken); stirring by using a multi-head magnetic stirrer (stirring for about 30 minutes) at a stirring speed of between 100 and 200 revolutions per minute, and sealing and standing by using a preservative film (standing for more than 12 hours) for later use after stirring is finished;
s3, soaking the magnesium alloy sheet prepared in the step S1 in the soaking solution prepared in the step S2 for reaction (after 1 hour of soaking), taking out and drying to obtain the copper myristate super-hydrophobic coating.
The prepared copper myristate super-hydrophobic coating has a hydrophobic angle of 150.5 degrees.
Example 6
(when the ratio of copper nitrate was 90%, the mass of myristic acid was 2.674g, the mass of copper nitrate was 2.610g, and 80ml of absolute ethanol was taken.)
S1, firstly, polishing a magnesium alloy substrate (the surface of the magnesium alloy sheet is physically polished by 1500# silicon carbide abrasive paper to make the surface smooth and flat, an oxide film and pits are preliminarily removed, then, the magnesium alloy sheet is fully cleaned by distilled water and dried), and then, the magnesium alloy sheet is placed in a mixed solution of ferric nitrate and zinc nitrate to react at room temperature (the concentration of the ferric nitrate solution is 8.08g/L, the concentration of the zinc nitrate solution is 5.95g/L, the ferric nitrate solution and the zinc nitrate solution are mixed according to the proportion of 1: 1 to prepare a mixed solution, and the reaction time is 15 min); taking out after a layer of reddish brown substance is generated, and drying (drying in a constant-temperature drying box at 100 ℃ for 1 hour); then fully cleaning the coating by using distilled water (3 to 5 times), washing loose coatings and impurities, and drying the coating again; (constant temperature oven drying, temperature 100 ℃, time 30 minutes)
S2, mixing and stirring myristic acid, copper nitrate and absolute ethyl alcohol to prepare a soaking solution (80 ml of absolute ethyl alcohol, 2.674g of myristic acid and 1.643g of copper nitrate are taken); stirring by using a multi-head magnetic stirrer (stirring for about 30 minutes) at a stirring speed of between 100 and 200 revolutions per minute, and sealing and standing by using a preservative film (standing for more than 12 hours) for later use after stirring is finished;
s3, soaking the magnesium alloy sheet prepared in the step S1 in the soaking solution prepared in the step S2 for reaction (after 1 hour of soaking), taking out and drying to obtain the copper myristate super-hydrophobic coating.
The prepared copper myristate super-hydrophobic coating has a hydrophobic angle of 135-140 degrees.
The experiment belongs to an exploratory test, and no relevant experimental data is used as a reference, so that a lot of attempts are made, and the content of each metal element needs to be tested for many times to compare the experimental effect. For comparison, I make the specific contents of the experiment into a table form as follows:
referring to fig. 2, after repeated experiments, the static contact angle of the copper nitrate with a content of 80% reaches a maximum of 162.4 °, and the effect is the best, and the corresponding surface topography is shown in fig. 3.
Referring to fig. 1, the experiment shows that the magnesium alloy sheet has the best effect of forming the hydrophobic film after being etched by hydrochloric acid and treated by the ethanol solution of myristic acid, and the hydrophobic angle reaches 162.396 °.
In summary, according to the preparation method of the copper myristate superhydrophobic coating, the corrosion-resistant coating and the superhydrophobic coating are formed on the surface of the magnesium alloy, so that corrosive substances cannot directly contact with the magnesium alloy substrate, and the corrosion resistance of the magnesium alloy is further improved.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (9)
1. A preparation method of a copper myristate super-hydrophobic coating is characterized by comprising the following steps:
s1, preparing a mixed solution of ferric nitrate and zinc nitrate, putting the magnesium alloy substrate into the mixed solution, taking out the magnesium alloy substrate after a layer of reddish brown substance is generated, and drying the magnesium alloy substrate; then, fully cleaning the mixture by using distilled water, and then drying the mixture again;
s2, mixing myristic acid, copper nitrate and absolute ethyl alcohol, and stirring to prepare a soaking solution;
s3, soaking the magnesium alloy sheet prepared in the step S1 in the soaking solution prepared in the step S2 for reaction, taking out the magnesium alloy sheet, and drying to obtain the copper myristate superhydrophobic coating.
2. The method for preparing the superhydrophobic coating of copper myristate according to claim 1, wherein in step S1, the magnesium alloy substrate is polished to make the surface smooth and flat and remove the oxide film and pits, and then is cleaned thoroughly with distilled water and dried.
3. The method for preparing the copper myristate superhydrophobic coating as claimed in claim 1, wherein in step S1, the ratio of the iron nitrate solution to the zinc nitrate solution is 1: 1 to prepare a mixed solution, reacting for 15min, taking out and drying after a layer of reddish brown substance is generated; then, fully cleaning the mixture for 3-5 times by using distilled water, and finally drying the mixture.
4. The method for preparing the copper myristate superhydrophobic coating of claim 3, wherein the concentration of the iron nitrate solution is 8.08g/L and the concentration of the zinc nitrate solution is 5.95 g/L.
5. The method for preparing the copper myristate superhydrophobic coating as claimed in claim 1, wherein in step S2, the ratio of myristic acid: copper nitrate: the volume ratio of the absolute ethyl alcohol is 30: (3-13): 800.
6. the method for preparing the superhydrophobic coating of copper myristate according to claim 1, wherein in step S2, the stirring time is 30 minutes and the stirring speed is 100-200 rpm.
7. The method for preparing the copper myristate superhydrophobic coating according to claim 6, wherein after the stirring is completed, the mixture is sealed and left standing for more than 12 hours.
8. The method for preparing the superhydrophobic coating of copper myristate according to claim 1, wherein in step S3, the soaking time is 1 hour, and the copper myristate is taken out after a layer of blue substance is formed on the surface.
9. The method for preparing the copper myristate superhydrophobic coating according to claim 1, wherein in step S3, the soaked magnesium alloy sheet is placed into a constant-temperature drying oven to be dried, the temperature is controlled at 100 ℃ for 1 hour, the copper myristate superhydrophobic coating is prepared after the temperature is reduced to room temperature after drying, and the temperature reduction time is 6-10 hours.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011045548.XA CN112175430A (en) | 2020-09-28 | 2020-09-28 | Preparation method of copper myristate super-hydrophobic coating |
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| CN113278956A (en) * | 2021-04-22 | 2021-08-20 | 华东交通大学 | Preparation method of super-hydrophobic copper mercaptan on surface of magnesium alloy |
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Application publication date: 20210105 |