Aluminum alloy hydrophobic anticorrosive antibacterial coating containing vanadium disulfide particles as well as preparation method and application

Abstract

The invention discloses an aluminum alloy hydrophobic anticorrosive antibacterial coating containing vanadium disulfide particles as well as a preparation method and application of the aluminum alloy hydrophobic anticorrosive antibacterial coating. The preparation method comprises the following steps that the surface of the aluminum alloy is pretreated and then subjected to anodic oxidation; epoxy resin, acetone, a curing agent and vanadium disulfide particles are mixed and then sprayed to the anodic oxidation surface, and then silane is grafted to hydroxyl of the epoxy resin; wherein the ratio of the sum of the mass of the epoxy resin and the curing agent to the mass of the vanadium disulfide particles is (0.5-1.8): 1. The aluminum alloy hydrophobic anticorrosive antibacterial coating does not need special illumination conditions, shows excellent antibacterial performance on staphylococcus aureus, escherichia coli and pseudomonas aeruginosa in a natural environment, and also has excellent hydrophobic performance and corrosion resistance; the corrosion-resistant coating is especially suitable for corrosion resistance of aluminum alloy surfaces used in marine environments and aluminum alloy components used in buildings.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy coatings, and in particular to an aluminum alloy hydrophobic anticorrosive and antibacterial coating containing vanadium disulfide particles, a preparation method and an application thereof. Background Art

[0002] Aluminum alloys have been widely used in many fields such as aerospace, automobile manufacturing, and electronic equipment due to their excellent properties, such as low density, good mechanical properties, good processing properties, and high strength-to-weight ratio. However, aluminum alloys also face some serious problems during use. Aluminum alloys are susceptible to corrosion in the natural environment, especially in humid, salty environments and marine environments, where the corrosion rate will accelerate. The marine environment is extremely harsh, and the seawater is rich in salt and various microorganisms. When aluminum alloys are used in the marine environment, they are not only exposed to the corrosion of seawater, but also susceptible to erosion by marine microorganisms. Microorganisms such as bacteria and algae in the ocean can attach, grow and reproduce on the surface of aluminum alloys to form biofilms. This biofilm will accelerate the corrosion process of aluminum alloys and reduce the effectiveness of anti-corrosion coatings. Corrosion, microbial attachment, and bacterial growth not only reduce the service life of aluminum alloys, but may also cause structural damage, thereby affecting the safety and reliability of equipment. Therefore, it is particularly important to improve the anti-corrosion and antibacterial ability of aluminum alloys. Finding aluminum alloy coatings and preparation technologies that have both antibacterial and anti-corrosion properties has become an urgent problem to be solved. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings and deficiencies of the prior art, the purpose of the present invention is to provide a method for preparing a hydrophobic, anticorrosive and antibacterial coating for an aluminum alloy containing vanadium disulfide particles. The prepared hydrophobic, anticorrosive and antibacterial coating for an aluminum alloy does not require special lighting conditions and shows excellent antibacterial properties against Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa in a natural environment. It also has excellent hydrophobic properties, which reduces the self-corrosion current density of the aluminum alloy, thereby improving its corrosion resistance.

[0004] Another object of the present invention is to provide an aluminum alloy hydrophobic anticorrosive and antibacterial coating containing vanadium disulfide particles.

[0005] Another object of the present invention is to provide an application of the above-mentioned aluminum alloy hydrophobic anticorrosive and antibacterial coating containing vanadium disulfide particles.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] The present invention provides a method for preparing an aluminum alloy hydrophobic anticorrosive and antibacterial coating containing vanadium disulfide particles, comprising the following steps:

[0008] (1) Anodizing the aluminum alloy surface after pretreatment;

[0009] (2) preparing a vanadium disulfide antibacterial coating on the surface of the aluminum alloy treated in step (1): mixing epoxy resin, acetone, and vanadium disulfide particles; adding a curing agent, and obtaining a mixed suspension after ultrasonic dispersion, spraying the mixed suspension onto the surface of the aluminum alloy treated in step (1), and obtaining a vanadium disulfide antibacterial coating after curing;

[0010] The ratio of the sum of the mass of the epoxy resin and the curing agent to the mass of the vanadium disulfide particles is 0.5 to 1.8:1; more preferably, the ratio of the sum of the mass of the epoxy resin and the curing agent to the mass of the vanadium disulfide particles is 1 to 1.5:1;

[0011] (3) performing a hydrophobic treatment on the vanadium disulfide antibacterial coating prepared in step (2): the vanadium disulfide antibacterial coating prepared in step (2) is solidified after being immersed in a silanization solution to obtain an aluminum alloy hydrophobic anticorrosive antibacterial coating containing vanadium disulfide particles.

[0012] Preferably, the microstructure of the vanadium disulfide particles is a layered structure, which is prepared by the following method:

[0013] Dissolving ammonium metavanadate in an aqueous ammonia solution and stirring to obtain a vanadium source solution; dissolving thioacetamide in deionized water and stirring to obtain a sulfur source solution;

[0014] The vanadium source solution and the sulfur source solution are mixed and stirred for 1 to 1.5 hours, placed in a reactor and reacted at 180 to 190° C. for 12 to 18 hours, the product is washed and dried at 60 to 80° C. for 7 to 9 hours, then ground and dried at 200 to 220° C. for 20 to 40 minutes to obtain vanadium disulfide particles.

[0015] Preferably, the silanization solution is a perfluorodecyltriethoxysilane solution or a hexadecyltrimethoxysilane solution.

[0016] Preferably, the volume concentration of the silanization solution is 1.5-2.5%, and the immersion time is 1.5-2.5 hours.

[0017] Preferably, the curing in step (3) is specifically: heating and curing at 110-130° C. for 2-4 hours.

[0018] Preferably, the anodizing step (1) is as follows:

[0019] An anodizing electrolyte containing 100-200 g / L sulfuric acid and 1.5-6 g / L oxalic acid is prepared, an aluminum alloy is fixed as an anode in an anodizing electrolytic cell containing the electrolyte, an electrolysis voltage is set to 12-24 V, an electrolysis temperature is set to 20-30° C., anodizing treatment is started, and anodizing is stopped after 10-40 minutes. After anodizing, the aluminum alloy sample is washed with anhydrous ethanol and deionized water, respectively, and finally dried to obtain an anodized aluminum alloy.

[0020] Preferably, the surface pretreatment in step (1) is specifically as follows: the surface of the aluminum alloy is polished with 400#, 600#, and 1000# mesh sandpapers respectively until the surface of the sample is smooth and there are no obvious scratches, and the sample is ultrasonically cleaned with sodium hydroxide, nitric acid, anhydrous ethanol, and deionized water in turn, and then dried.

[0021] The present invention also provides an aluminum alloy hydrophobic anticorrosive and antibacterial coating containing vanadium disulfide particles, which comprises an anodic oxide layer and a hydrophobic vanadium disulfide antibacterial coating arranged on the surface of the aluminum alloy in sequence;

[0022] The hydrophobic vanadium disulfide antibacterial coating is obtained by mixing epoxy resin, acetone, a curing agent and vanadium disulfide particles and spraying the mixture onto the anodized surface, and then grafting silane onto the hydroxyl groups of the epoxy resin;

[0023] The ratio of the sum of the mass of the epoxy resin and the curing agent to the mass of the vanadium disulfide particles is 0.5-1.8:1.

[0024] The present invention also provides the application of the aluminum alloy hydrophobic anticorrosive and antibacterial coating containing vanadium disulfide particles, which is used for the anticorrosion of aluminum alloy surfaces used in marine environments and aluminum alloy components used in buildings.

[0025] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0026] (1) The method for preparing the hydrophobic, anti-corrosion and antibacterial coating of aluminum alloy containing vanadium disulfide particles of the present invention comprises mixing epoxy resin and acetone with the prepared vanadium disulfide particles, adding a curing agent and then uniformly spraying the mixture onto the surface of the aluminum alloy after anodizing treatment, so that the surface of the aluminum alloy shows excellent antibacterial properties against Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa under the natural environment without special lighting conditions; since the hydrophobic properties of the aluminum alloy surface are reduced after coating, the coating is subjected to silanization modification treatment by immersion using a silanization solution to improve its hydrophobic properties, thereby improving the anti-corrosion properties of the aluminum alloy surface with a slight sacrifice of the antibacterial properties.

[0027] (2) The method for preparing the hydrophobic, anti-corrosion and antibacterial coating of aluminum alloy containing vanadium disulfide particles of the present invention is to select suitable raw materials, proportions and control reaction conditions, and adopt a hydrothermal synthesis method to prepare antibacterial vanadium disulfide particles with a layered structure similar to that of petals. The preparation process is simple.

[0028] (3) The preparation method of the hydrophobic anticorrosive and antibacterial coating of aluminum alloy containing vanadium disulfide particles of the present invention uses a silanization solution to modify the coating by immersion. After the silane is hydrolyzed, it is grafted with the hydroxyl group of the epoxy resin. The formed hydrocarbon chains and Si-O-Si network reduce the surface energy of the resin, and there is a good layered micro-nano structure on the surface of the coating. The combined effect of these two structures improves the water contact angle of the coating, thereby overcoming the problem that it is difficult to improve the water contact angle of the coating by hydrophobic modification of the vanadium disulfide particles.

[0029] (4) The method for preparing the hydrophobic, anti-corrosion and antibacterial coating of aluminum alloy containing vanadium disulfide particles of the present invention uses anodizing technology to pretreat the surface of the aluminum alloy to improve the anti-corrosion performance of the aluminum alloy, while providing a substrate surface with a suitable roughness for the subsequent spraying of the coating.

[0030] (5) The method for preparing the hydrophobic, anti-corrosion and antibacterial coating of aluminum alloy containing vanadium disulfide particles of the present invention is to prepare the aluminum alloy antibacterial coating by combining anodizing surface treatment technology with vanadium disulfide hydrothermal synthesis technology and spraying process, and use silane to perform hydrophobic modification on the coating. The method is simple and low-cost.

[0031] (6) The aluminum alloy hydrophobic, anti-corrosion and antibacterial coating containing vanadium disulfide particles of the present invention effectively improves the hydrophobicity, anti-corrosion and antibacterial properties of the aluminum alloy, and the antibacterial property does not depend on special lighting. It is particularly suitable for the corrosion protection of aluminum alloy surfaces used in marine environments and aluminum alloy components used in buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is the XRD spectrum of the vanadium disulfide particles prepared in Example 1 of the present invention.

[0033] Figure 2 This is a SEM image of vanadium disulfide particles prepared in Example 1 of the present invention.

[0034] Figure 3 This is a SEM image of the hydrophobic, anticorrosive and antibacterial coating prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the examples, but the embodiments of the present invention are not limited thereto.

[0036] Example 1

[0037] 1. Aluminum alloy surface anodizing treatment

[0038] 1.1 Pretreatment of aluminum alloy: Use 400#, 600#, and 1000# sandpaper to polish the surface of the aluminum alloy until the surface of the sample becomes smooth and there are no obvious scratches. Use sodium hydroxide, nitric acid, anhydrous ethanol, and deionized water to ultrasonically clean the sample in sequence, and then dry it.

[0039] 1.2 Anodizing: Prepare an anodizing electrolyte containing 150g / L sulfuric acid and 4.5g / L oxalic acid, and pour the electrolyte into the anodizing electrolytic cell. Fix the aluminum alloy as the anode in the anodizing electrolytic cell containing the electrolyte, set the electrolysis voltage to 20V, the electrolysis temperature to 25℃, start the anodizing treatment, and stop the anodizing after 30 minutes.

[0040] 1.3 Post-treatment: After anodizing, the aluminum alloy samples were washed with anhydrous ethanol and deionized water, respectively, and finally dried to obtain an anodized aluminum alloy.

[0041] 2. Preparation of Vanadium Disulfide Particles

[0042] 2.1 Dissolve 1g of ammonium metavanadate (NH4VO3) in aqueous ammonia solution and stir.

[0043] 2.2 Dissolve 5 g of thioacetamide (C2H5NS) in deionized water and stir.

[0044] 2.3 The two solutions were mixed and stirred for 1 h, and then transferred to a 100 mL Teflon-lined stainless steel reactor. The Teflon-lined stainless steel reactor was then placed in a 185 °C oven and kept at a constant temperature for 15 h.

[0045] 2.4 After the reactor is cooled, the product is taken out, centrifuged and repeatedly washed with deionized water and ethanol to remove impurities, and then placed in an oven at 75°C to dry for 8 hours.

[0046] 2.5 Take out, grind, and put it into a 210°C oven to dry for 0.5h to further decompose and remove excess impurities. Finally, vanadium disulfide particles are obtained.

[0047] 3. Preparation of Vanadium Disulfide Antibacterial Coating

[0048] 3.1 Mix 0.33 g epoxy resin (E44), 0.33 g acetone and 1 g vanadium disulfide particles at 250 r / min and stir for 3 h.

[0049] 3.2 Add 1 g of curing agent (MHHPA) and perform ultrasonic dispersion treatment for 10 min to obtain a mixed suspension with better dispersion.

[0050] 3.3 Use a spray gun to spray the mixed suspension onto the surface of the anodized aluminum alloy, put it into an oven and heat it at 120°C for 3 hours to obtain a vanadium disulfide antibacterial coating.

[0051] 4. Hydrophobic modification

[0052] 4.1 The vanadium disulfide antibacterial coating was subjected to a hydrophobic treatment, that is, the aluminum alloy antibacterial coating was immersed in a silanization solution containing 2 (V / V)% perfluorodecyltriethoxysilane for 2 hours.

[0053] 4.2 Heat and cure at 120℃ for 2h to obtain an aluminum alloy hydrophobic, anticorrosive and antibacterial coating containing vanadium disulfide particles.

[0054] Example 2

[0055] In this embodiment, except that in the hydrophobic modification stage, the silanization solution is changed from 2 (V / V)% perfluorodecyltriethoxysilane to 2 (V / V)% hexadecyltrimethoxysilane, the other conditions are the same as those in Example 1.

[0056] Comparative Example 1

[0057] This comparative example is an untreated aluminum alloy.

[0058] Comparative Example 2

[0059] This comparative example is an anodized aluminum alloy, and the treatment steps are the same as the anodized treatment steps of the aluminum alloy surface in Example 1.

[0060] Comparative Example 3

[0061] This comparative example is a vanadium disulfide antibacterial coating, and its preparation method is the same as that of Example 1, including anodizing treatment of the aluminum alloy surface, preparation of vanadium disulfide particles, and preparation of the vanadium disulfide antibacterial coating, but without the hydrophobic modification step.

[0062] Test results:

[0063] Material Characterization - XRD

[0064] The XRD spectrum of the vanadium disulfide particles synthesized in Example 1 is as follows: Figure 1 As shown. The diffraction peaks of 2θ=15.4°, 35.8°, 45.2°, 57.1°, 58.2°, 59.6°, 69.2° and 75.7° correspond to the vanadium disulfide standard cards (001), (011), (012), (110), (103), (111), (201) and (202) (reference standard card JCPDS 01-089-1640), respectively. This indicates that pure vanadium disulfide particles have been successfully synthesized.

[0065] Material Characterization - SEM

[0066] The SEM image of the vanadium disulfide particles synthesized in Example 1 is as follows: Figure 2 The synthesized vanadium disulfide particles have a layered structure similar to petals.

[0067] The SEM image of the hydrophobic antiseptic and antibacterial coating prepared in Example 1 is as follows: Figure 3 As shown. It can be seen that the prepared vanadium disulfide particles are tightly bonded to the resin and silane. It can be seen that the hydrophobic anticorrosive and antibacterial coating is a highly stacked micro-nano layered structure, indicating that after the vanadium disulfide is mixed with the resin and the silane is hydrophobically modified to the coating, its structure is stable, the morphology is uniform, and the size is evenly distributed. The two key conditions for achieving hydrophobicity are low surface energy and high roughness. The highly stacked micro-nano layered structure provides favorable conditions for high roughness, which is conducive to improving the hydrophobic properties of the coating.

[0068] Antibacterial performance test:

[0069] Staphylococcus aureus and Escherichia coli, which are common in daily life, and Pseudomonas aeruginosa, one of the main bacteria in the ocean, were used as bacterial species. The plate coating counting method was used to count the colonies. The anodized aluminum alloy was used as a blank control to evaluate the antibacterial performance of the coating. There was no special light during the test. The specific process is as follows:

[0070] The bacterial solution was diluted in a gradient manner, and 50 μL of the diluted bacterial solution was added to the blank control plate and the surface of the coating to be tested, respectively, and covered with a sterile film, and placed in a 37°C constant temperature incubator for 24 hours. The blank control plate and the surface of the coating to be tested were rinsed with a certain amount of PBS buffer solution, and the eluate was collected. Then, the eluate was diluted in a gradient manner and evenly applied to the solid culture medium, and cultured in a 37°C constant temperature incubator for 24 hours, taken out, and the surface colonies were observed and counted to calculate the antibacterial rate. The antibacterial rate formula is as follows:

[0071] R=(BA) / B×100%

[0072] R-antibacterial rate

[0073] B- blank control plate colony count

[0074] A- Colony count of the coating to be tested

[0075] The antibacterial rate is shown in Table 1. As can be seen from the table, the antibacterial rate of the vanadium disulfide antibacterial coating against Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa is more than 98%, indicating that even without special illumination, the addition of vanadium disulfide has a very obvious antibacterial effect on the above three bacteria. The antibacterial rate of the antiseptic and antibacterial coating (Example 1 and Example 2) after hydrophobic antiseptic treatment has decreased, but both reached more than 91%. This is because the surface of the antiseptic and antibacterial coating after hydrophobic antiseptic treatment is covered with a hydrophobic layer, which reduces the antibacterial agent in contact with bacteria, resulting in a decrease in antibacterial performance, which further indicates that the antibacterial performance of the coating mainly comes from vanadium disulfide.

[0076] Table 1 Antibacterial properties of aluminum alloy surfaces of Comparative Examples 2-3 and Examples 1-2

[0077]

[0078] Hydrophobic properties:

[0079] Water contact angle can be used to evaluate the hydrophobicity of the coating. The higher the water contact angle, the better the hydrophobicity. When the contact angle is less than 90°, it is partially wetted or wetted, and hydrophilic; when the contact angle = 90°, it is the dividing line between wettability and non-wetting; when the contact angle is greater than 90°, it is non-wetting and hydrophobic.

[0080] The hydrophobic properties of the untreated aluminum alloy, the anodized aluminum alloy, the vanadium disulfide antibacterial coating and the hydrophobic anticorrosive antibacterial coating prepared by the present invention (using 2 (V / V)% perfluorodecyltriethoxysilane and 2 (V / V)% hexadecyltrimethoxysilane as hydrophobic modification agents, respectively) are shown in Table 2. The test water is deionized water. It can be seen that the water contact angle of the untreated aluminum alloy is less than 90°, showing hydrophilicity; the water contact angle of the anodized aluminum alloy is greater than 90°, showing hydrophobicity; but the water contact angle of the vanadium disulfide antibacterial coating after spraying vanadium disulfide particles on the surface of the anodized aluminum alloy is less than 90°, which is lower than that of the anodized aluminum alloy and shows hydrophilicity; therefore, the vanadium disulfide antibacterial coating needs to be hydrophobically modified by silane, and the coatings of Example 1 and Example 2, which use 2 (V / V)% perfluorodecyltriethoxysilane and 2 (V / V)% hexadecyltrimethoxysilane as hydrophobic modification agents, respectively, have greatly improved water contact angles compared with the aforementioned samples, both

[0081] >90°, showing hydrophobicity, indicating that hydrophobic modification of the coating is beneficial to improving the hydrophobic properties of the coating. After hydrolysis, silane is grafted with the hydroxyl group of the epoxy resin to form a hydrocarbon chain and Si-O-Si network to reduce the surface energy of the resin, and there is a good layered micro-nano structure on the surface of the coating. The combined effect of these two structures improves the water contact angle of the coating.

[0082] Table 2 Comparison of hydrophobic properties

[0083]

[0084]

[0085] Anti-corrosion properties:

[0086] The self-corrosion current density is one of the important indicators reflecting the anti-corrosion performance of materials. The smaller the self-corrosion current density, the better the anti-corrosion performance. The self-corrosion current density test data of each material are shown in Table 3. It can be seen from the table that the self-corrosion current density of untreated aluminum alloy is on the order of 10 -6 ; The self-corrosion current density of aluminum alloy after anodizing treatment is reduced by 3 orders of magnitude; the self-corrosion current density of vanadium disulfide antibacterial coating is further reduced by 1 order of magnitude; and the self-corrosion current density of hydrophobic antibacterial coating modified by silane is further reduced by 2 orders of magnitude to 10 -12 , indicating that the aluminum alloy hydrophobic anti-corrosion and antibacterial coating of the present invention has a very obvious effect of improving the corrosion resistance of the aluminum alloy.

[0087] Table 3 Anticorrosion performance

[0088] sample <![CDATA[Self - corrosion current density (A·cm -2 )]]> Untreated aluminum alloy of Comparative Example 1 <![CDATA[1.815×10 -6 ]]> Anodized aluminum alloy of Comparative Example 2 <![CDATA[3.381×10 -9 ]]> Vanadium disulfide antibacterial coating of Comparative Example 3 <![CDATA[6.348×10 -10 ]]> Hydrophobic antiseptic and antibacterial coating of Example 1 <![CDATA[9.253×10 -12 ]]> Hydrophobic antiseptic and antibacterial coating of Example 2 <![CDATA[8.340×10 -12 ]]>

[0089] In summary, the aluminum alloy coating prepared by the present invention has obvious antibacterial properties under conditions without special lighting, and also has excellent hydrophobic properties and anti-corrosion properties. It is a multifunctional coating that can be applied to the antibacterial and anti-corrosion of aluminum alloy surfaces, and is particularly suitable for the anti-corrosion of aluminum alloy surfaces used in marine environments and aluminum alloy components used in buildings.

[0090] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A method for preparing a hydrophobic, anticorrosive and antibacterial coating for an aluminum alloy containing vanadium disulfide particles, characterized in that: The following steps are involved: (1) Anodizing the aluminum alloy surface after pretreatment; (2) preparing a vanadium disulfide antibacterial coating on the surface of the aluminum alloy treated in step (1): mixing epoxy resin, acetone, and vanadium disulfide particles; adding a curing agent, and obtaining a mixed suspension after ultrasonic dispersion, spraying the mixed suspension onto the surface of the aluminum alloy treated in step (1), and obtaining a vanadium disulfide antibacterial coating after curing; The ratio of the sum of the mass of the epoxy resin and the curing agent to the mass of the vanadium disulfide particles is 0.5 to 1.8:1; (3) performing a hydrophobic treatment on the vanadium disulfide antibacterial coating prepared in step (2): the vanadium disulfide antibacterial coating prepared in step (2) is solidified after being immersed in a silanization solution to obtain an aluminum alloy hydrophobic anticorrosive antibacterial coating containing vanadium disulfide particles.

2. The method for preparing the aluminum alloy hydrophobic anticorrosive and antibacterial coating containing vanadium disulfide particles according to claim 1, characterized in that: The microstructure of the vanadium disulfide particles is a layered structure.

3. The method for preparing the hydrophobic, anticorrosive and antibacterial coating of aluminum alloy containing vanadium disulfide particles according to claim 1, characterized in that: The mass ratio of the epoxy resin to the vanadium disulfide particles is 1:(2.5-3.5).

4. The method for preparing the aluminum alloy hydrophobic anticorrosive and antibacterial coating containing vanadium disulfide particles according to claim 1, characterized in that: The silanization solution is a perfluorodecyltriethoxysilane solution or a hexadecyltrimethoxysilane solution.

5. The method for preparing the aluminum alloy hydrophobic anticorrosive and antibacterial coating containing vanadium disulfide particles according to claim 1, characterized in that: The volume concentration of the silanization solution is 1.5-2.5%, and the soaking time is 1.5-2.5 hours.

6. The method for preparing the aluminum alloy hydrophobic anticorrosive and antibacterial coating containing vanadium disulfide particles according to claim 1, characterized in that: The curing in step (3) is specifically: heating and curing at 110-130° C. for 2-4 hours.

7. The method for preparing the aluminum alloy hydrophobic anticorrosive and antibacterial coating containing vanadium disulfide particles according to claim 1, characterized in that: The step (1) of anodizing is specifically as follows: An anodizing electrolyte containing 100-200 g / L sulfuric acid and 1.5-6 g / L oxalic acid is prepared, an aluminum alloy is fixed as an anode in an anodizing electrolytic cell containing the electrolyte, an electrolysis voltage is set to 12-24 V, an electrolysis temperature is set to 20-30° C., anodizing treatment is started, and anodizing is stopped after 10-40 minutes. After anodizing, the aluminum alloy sample is washed with anhydrous ethanol and deionized water, respectively, and finally dried to obtain an anodized aluminum alloy.

8. The method for preparing the aluminum alloy hydrophobic anticorrosive and antibacterial coating containing vanadium disulfide particles according to claim 1, characterized in that: The surface pretreatment in step (1) is specifically as follows: the surface of the aluminum alloy is polished with 400#, 600#, and 1000# sandpapers respectively until the surface of the sample is smooth and there are no obvious scratches, and the sample is ultrasonically cleaned with sodium hydroxide, nitric acid, anhydrous ethanol, and deionized water in turn, and then dried.

9. A hydrophobic, anticorrosive and antibacterial coating for aluminum alloy containing vanadium disulfide particles, characterized in that: The method comprises, in sequence, an anodized layer and a hydrophobic vanadium disulfide antibacterial coating arranged on the surface of the aluminum alloy; The hydrophobic vanadium disulfide antibacterial coating is obtained by mixing epoxy resin, acetone, a curing agent and vanadium disulfide particles and spraying the mixture onto the anodized surface, and then grafting silane onto the hydroxyl groups of the epoxy resin; The ratio of the sum of the mass of the epoxy resin and the curing agent to the mass of the vanadium disulfide particles is 0.5-1.8:

1.

10. The use of the aluminum alloy hydrophobic anticorrosive and antibacterial coating containing vanadium disulfide particles according to claim 9, characterized in that: Used for corrosion protection of aluminum alloy surfaces used in marine environments and aluminum alloy components used in buildings.

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