Crosslinked amphiphilic acrylate marine antifouling coating, its preparation method and application

Abstract

The present invention discloses a crosslinked amphiphilic acrylate marine antifouling coating, its preparation method and application. In the preparation method of the crosslinked amphiphilic acrylate antifouling coating, first, an amphiphilic acrylate polymer is prepared by free radical polymerization; subsequently, an amino-terminated polydimethylsiloxane is used to carry out a ring-opening reaction with the epoxy groups in the amphiphilic acrylate polymer to prepare the coating, and a crosslinked amphiphilic acrylate polymer with a general formula structure is obtained. The polymer can be further dried and cured on a substrate by spin coating to obtain an antifouling coating. This antifouling coating is a high-performance environmental-friendly static marine antifouling coating. The crosslinked design improves the mechanical strength, thus meeting the actual application in complex marine environments.

Description

Technical Field

[0001] The present invention relates to the field of marine antifouling coatings, and particularly to a crosslinked amphiphilic acrylate marine antifouling coating, a preparation method thereof, and an application thereof. Background Art

[0002] The problem of fouling organisms is a common problem in marine facilities. Microorganisms, animals, and plants in the ocean will adhere to the surface of equipment to form macroscopic fouling, resulting in adverse effects such as increased ship weight and biological invasion, thus restricting the development of the marine industry. Coating antifouling paints is the simplest and most efficient way to solve biological fouling. Traditional antifouling paints kill fouling organisms on the surface by releasing biocides or toxic metals. However, studies have shown that although releasing toxic substances into seawater significantly solves the problem of fouling adhesion, it will accumulate in organisms and cause deformities, violating the environmentally friendly strategy. Marine biofilms are a key step in the fouling adhesion process, providing favorable conditions for the subsequent reproduction and attachment of fouling. Therefore, suppressing biofilm formation at the source is an effective strategy. Traditional acrylate coatings belong to the self-polishing type. Under seawater immersion, the side chains hydrolyze and peel off layer by layer, removing the fouling organisms attached to the surface. However, it will damage the internal and surface structures of the coating, resulting in a decrease in mechanical properties. The inventor believes that introducing functional groups to design a crosslinked structure can reduce such problems.

[0003] Chinese patent document CN103694421B (patent number 201310642570.6) discloses a self-crosslinking type low surface energy antifouling coating resin and a preparation method thereof. Polyorganosiloxane acrylate, methacrylate, and KH-570 are polymerized by solution polymerization. This polymer can be self-crosslinked by moisture, which can improve the mechanical properties of the coating; the side chain contains a polyorganosiloxane chain to provide fouling release performance for the coating.

[0004] Chinese patent document CN115584153B (patent number 202211292892.8) discloses a modified organosilicon marine antifouling coating based on an ionic network and a preparation method thereof. The strong crosslinked structure based on polyorganosiloxane improves the strength and toughness of the coating, and the introduction of imidazolium salt and pyromellitic acid endows the coating with good elasticity and high energy dissipation. The double-network coating formed by the combination of the two not only has excellent marine antifouling ability, but also has strong adhesion to various substrates.

[0005] Starting from different inventive concepts, the purpose of the present invention is to design a marine antifouling coating with high tensile strength and high efficiency in antifouling. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a crosslinked amphiphilic acrylate marine antifouling coating, a preparation method thereof, and an application thereof, and to design and prepare a marine antifouling coating with high tensile strength and high efficiency in antifouling.

[0007] The technical solution adopted is as follows:

[0008] A crosslinked amphiphilic acrylate marine antifouling coating of the present invention has the following structural formula:

[0009]

[0010] In the above formula, r1, r2, r3, r4, and r5 are the number of repeating units of random copolymerization, all being natural numbers greater than 1; the monomer repeated by r1 is glycidyl methacrylate; the monomer repeated by r2 is methyl methacrylate; the monomer repeated by r3 is polyethylene glycol methyl ether methacrylate, where n is a natural number between 26 and 30; the monomer repeated by r4 is 2-hydroxyethyl acrylate; the monomer repeated by r5 is isobornyl acrylate; the wavy line in the above structural formula represents the remaining structure of amino-terminated polydimethylsiloxane without a double-NH 2 functional group, where m is the number of repeating units of siloxane, and m is a natural number of 10 - 25.

[0011] A preparation method of the above crosslinked amphiphilic acrylate marine antifouling coating of the present invention includes the following steps:

[0012] S1. Preparation of amphiphilic acrylate polymer:

[0013] Add xylene and N,N-dimethylformamide into a round-bottom flask equipped with a thermometer, a magnetic stirrer, and a condenser, and introduce nitrogen; preheat to 85 - 90 °C, mix xylene, N,N-dimethylformamide, glycidyl methacrylate, methyl methacrylate, polyethylene glycol methyl ether methacrylate, 2-hydroxyethyl acrylate, isobornyl acrylate, and an initiator evenly, and dropwise add the above mixed liquid at a constant speed; after the dropping is completed, dropwise add a mixed solution of benzoyl peroxide and xylene, and keep warm after the dropping is completed to obtain an amphiphilic acrylate polymer;

[0014] S2. Preparation of crosslinked amphiphilic acrylate marine antifouling coating:

[0015] Take the amphiphilic acrylate polymer and xylene solvent in a container and stir evenly; add amino-terminated polydimethylsiloxane to the above mixed solution, and react fully in a nitrogen environment. After the reaction is completed, a crosslinked amphiphilic acrylate antifouling coating is obtained.

[0016] Furthermore, the preparation method of the crosslinked amphiphilic acrylate marine antifouling coating includes the following steps:

[0017] S1. Preparation of amphiphilic acrylate polymer:

[0018] Add 15 - 25 parts by mass of xylene and 5 - 10 parts by mass of N - N - dimethylformamide into a round - bottom flask equipped with a thermometer, a magnetic stirrer and a condenser tube, and introduce nitrogen; preheat to 85 - 90 °C, add 4 - 7 parts by mass of xylene, 9 - 11 parts by mass of N - N - dimethylformamide, 10 - 14 parts by mass of glycidyl methacrylate, 20 - 23 parts by mass of methyl methacrylate, 4 - 7 parts by mass of polyethylene glycol methyl ether methacrylate, 10 - 14 parts by mass of 2 - hydroxyethyl acrylate, 8 - 11 parts by mass of isobornyl acrylate, and 0.4 - 1 part by mass of initiator and mix them evenly, then dropwise add the above - mentioned mixed liquid at a uniform speed; after the dropping is completed, dropwise add a mixed solution of 0.1 - 0.3 part by mass of benzoyl peroxide and 4 - 7 parts by mass of xylene, and keep the temperature for 1 - 2 h to obtain an amphiphilic acrylate polymer.

[0019] S2. Preparation of cross - linked amphiphilic acrylate marine antifouling coating:

[0020] Weigh 8 - 11 parts by mass of amphiphilic acrylate polymer and 4 - 6 parts by mass of xylene solvent in a container and stir evenly; add 0.1 - 2 parts by mass of amino - terminated polydimethylsiloxane to the above - mentioned mixed solution, and react fully under a nitrogen environment. After the reaction is completed, a cross - linked amphiphilic acrylate antifouling coating is obtained.

[0021] Furthermore, in S1, the initiator is one or both of azobisisobutyronitrile and azobis - 2,4 - dimethylvaleronitrile.

[0022] Furthermore, in S1, the above - mentioned mixed liquid is dropwise added at a uniform speed using a constant - pressure dropping funnel for 3 h.

[0023] Furthermore, in S2, the reaction is carried out at 60 °C for 4 h under a nitrogen environment.

[0024] Furthermore, the preparation method of the cross - linked amphiphilic acrylate marine antifouling coating of the present invention further includes S3. Coating the coating prepared in S2 on the surface of the substrate by spin - coating and heating for curing.

[0025] Furthermore, in S3, the spin - coating speed is set to 1500 - 2000 rmp.

[0026] Furthermore, in S3, the curing temperature is 80 °C.

[0027] Application of the above - mentioned cross - linked amphiphilic acrylate marine antifouling coating of the present invention on the surface of a ship.

[0028] In the above - mentioned technical solution,

[0029] The present invention provides a marine antifouling coating that forms a crosslinked structure through a chemical reaction to enhance the tensile strength of the coating. The high tensile strength of the coating stems from the ring-opening reaction of amino-terminated polydimethylsiloxane and amphiphilic acrylate. The abundant epoxy groups on the side chain of the amphiphilic acrylate react with the amino groups at both ends of the amino-terminated polydimethylsiloxane to form a crosslinked network. The amphiphilic acrylate is prepared by introducing antifouling monomers such as borneol (isobornyl acrylate) and polyethylene glycol (methoxypolyethylene glycol methacrylate) into acrylate through free radical polymerization, endowing the coating with the ability to resist the adhesion of marine fouling organisms.

[0030] In the preparation method of the crosslinked amphiphilic acrylate antifouling coating, first, the amphiphilic acrylate polymer is prepared by free radical polymerization; subsequently, the coating is prepared by the ring-opening reaction of amino-terminated polydimethylsiloxane with the epoxy groups in the amphiphilic acrylate polymer, obtaining a crosslinked amphiphilic acrylate polymer with a general formula structure. The polymer can be further dried and cured on the substrate by spin coating to obtain the antifouling coating. This antifouling coating is a high-performance environmentally friendly static marine antifouling coating, and the crosslinked design improves the mechanical strength, thus meeting the actual application in complex marine environments.

[0031] In summary, the beneficial effects of the present invention are as follows:

[0032] 1. The preparation process is simple and controllable, and the crosslinked structure of the coating stably exists under seawater conditions.

[0033] 2. The ring-opening reaction of the amino functional groups at both ends of the amino-terminated polydimethylsiloxane with the amphiphilic acrylate rich in epoxy functional groups on the side chain enhances the tensile strength of the coating.

[0034] 3. The introduction of borneol and polyethylene glycol side chains by free radical polymerization constructs an amphiphilic polymer to resist the adhesion of bacteria and diatoms in the ocean. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is the stress-strain curve diagram of the crosslinked amphiphilic acrylate marine antifouling coating of Examples 1-4;

[0036] Figure 2 is the experimental result diagram of the crosslinked amphiphilic acrylate marine antifouling coating of Examples 1-4 and Comparative Example 1 for inhibiting Amphora;

[0037] Figure 3 is the experimental result diagram of the crosslinked amphiphilic acrylate marine antifouling coating of Examples 1-4 and Comparative Example 1 for inhibiting Nitzschia closterium f. minutissima;

[0038] Figure 4 is the experimental result diagram of the crosslinked amphiphilic acrylate marine antifouling coating of Examples 1-4 and Comparative Example 1 for inhibiting Escherichia coli;

[0039] Figure 5 It is the experimental result diagram of the crosslinked amphiphilic acrylate marine antifouling coating of Examples 1-4 and Comparative Example 1 for inhibiting Staphylococcus aureus;

[0040] Figure 6 It is the experimental result diagram of the crosslinked amphiphilic acrylate marine antifouling coating of Examples 1-4 and Comparative Example 1 for inhibiting Pseudomonas pseudoalcaligenes xiamenensis. Specific Embodiments

[0041] The present invention will be described in detail below through specific examples. However, the uses and purposes of these exemplary embodiments are only used to illustrate the present invention, and do not constitute any form of limitation to the actual protection scope of the present invention, nor limit the protection scope of the present invention thereto.

[0042] Example 1

[0043] A preparation method of a crosslinked amphiphilic acrylate marine antifouling coating in this example includes the following steps:

[0044] Step 1: Preparation of amphiphilic acrylate polymer:

[0045] Add xylene (20 g) and N,N-dimethylformamide (10 g) to a three-necked flask. The whole device is equipped with a thermometer, a magnetic stirrer and a condenser and is pre-filled with nitrogen. Heat the temperature of the three-necked flask to 85-90 °C, and then mix xylene (5 g), N,N-dimethylformamide (10 g), glycidyl methacrylate (12 g), methyl methacrylate (21 g), poly(ethylene glycol) methyl ether methacrylate (6 g), 2-hydroxyethyl acrylate (12 g), isobornyl acrylate (9 g), and 0.5 g of initiator (azobisisobutyronitrile and azobis(2,4-dimethylvaleronitrile)) evenly. Use a constant-pressure dropping funnel to drop the above mixed liquid evenly for 3 h. After the dropping is completed, continue to drop a mixed solution of 0.1 g of benzoyl peroxide and 5 g of xylene. After the dropping is completed, keep the temperature for 1-2 h to obtain an amphiphilic acrylate polymer, denoted as A;

[0046] Step 2: Preparation of crosslinked amphiphilic acrylate marine antifouling coating:

[0047] Weigh 10 g of amphiphilic acrylate polymer and 5 g of xylene into a three-necked flask and stir evenly. Add 1 g of amino-terminated polydimethylsiloxane to the above solution and react at 60 °C for 4 h under a nitrogen environment. After the reaction is completed, a crosslinked amphiphilic acrylate antifouling coating is obtained, denoted as B;

[0048] Step 3: Spin coat B on the substrate by spin coating to obtain coating C at 80 °C.

[0049] Perform the following experiments to test the performance of the coating:

[0050] Tensile property test of the coating: The sample was prepared into a dumbbell shape, and a universal testing machine was used to test the mechanical properties of the material. Three parallel samples were tested for each sample. Figure 1 It is the stress-strain curve of the crosslinked amphiphilic acrylate marine antifouling coating;

[0051] The tensile strength and elongation at break of the material were calculated to be 3.15 MPa and 113%.

[0052] Laboratory diatom inhibition experiment: The coating size was made 2.5 cm × 3.5 cm. A blank glass slide was selected as the control sample. The sample and the blank were immersed in two model algal species (Surirella sp., Nitzschia closterium f. minutissima) for 2 days and 7 days respectively. After taking out the samples, the unattached diatoms on the surface were rinsed with deionized water, and the attachment of algae on the coating was photographed under an optical microscope. Five random areas were selected for each coating to take pictures. The number of diatom cells on the sample and the blank glass slide was calculated. Through the formula:

[0053]

[0054] where D is the inhibition rate of diatom attachment, C B is the average value of the number of diatom cells on the surface of the blank glass slide, and C is the average value of the number of diatom cells on the surface of the sample. Figure 2 and Figure 3 It is the experimental result diagram of inhibiting Surirella sp. and Nitzschia closterium f. minutissima of the crosslinked amphiphilic acrylate marine antifouling coating;

[0055] The inhibition rate of Surirella sp. attachment and the inhibition rate of Nitzschia closterium f. minutissima attachment were calculated to be 92.36% and 94.93% respectively.

[0056] Laboratory antibacterial experiment: The coating size of the sample was made 2.5 cm × 3.5 cm. A blank glass slide was selected as the control sample. The sample and the blank glass slide were co-cultured with the bacterial solution at 37 °C (Escherichia coli, Staphylococcus aureus). The culture times were 12 h and 24 h respectively. They were diluted to the same multiple with the nutrient solution. A certain amount of the bacterial solution was spread on the solid medium by the plate coating method (coated 3 times in parallel for each sample). The culture times were 12 h and 24 h respectively under the condition of 37 °C. The plates were taken out, and the number of colonies on the sample and the blank glass slide was calculated by the colony counting method. Through the formula:

[0057]

[0058] where S is the inhibition rate of bacterial attachment, N B is the average value of the number of bacteria adhered to the surface of the blank glass slide, and N is the average value of the number of bacteria adhered to the surface of the sample. Figure 4 、Figure 5 and Figure 6 are the experimental result diagrams of inhibiting Escherichia coli, Staphylococcus aureus and Pseudomonas pseudoalteromonas Xiamenensis for the crosslinked amphiphilic acrylate marine antifouling coating;

[0059] The antibacterial rates of Escherichia coli and Staphylococcus aureus were calculated to be 96.6% and 80.5% respectively.

[0060] Pseudomonas pseudoalteromonas Xiamenensis (MCCC 1A06494) was selected as the model strain. The sample and the blank glass slide were co-cultured with the bacterial liquid at 28 - 30 °C for 48 h. After diluting to the same multiple with the nutrient solution, the bacterial liquid was spread on the solid medium by the plate coating method (each sample was coated in parallel 3 times), and cultured at 28 - 30 °C for 48 h. The petri dish was taken out, and the colony numbers on the sample and the blank glass slide were calculated by the colony counting method. The calculation formula of the antibacterial rate of Pseudomonas pseudoalteromonas Xiamenensis was the same as that of the above-mentioned inhibition rate of bacterial attachment, and the antibacterial rate was calculated to be 96.83%.

[0061] Comparative Example 1

[0062] Referring to Example 1, the difference from Example 1 is that for a crosslinked amphiphilic acrylate marine antifouling coating in this comparative example, during the preparation process, the addition amount of amino-terminated polydimethylsiloxane was 0 g, and the rest of the methods remained unchanged as shown in Example 1.

[0063] Test was carried out according to the test method of Example 1, see Figures 2 - 6 As shown, the results were: no tensile strength test data was obtained in this comparative example because qualified test samples could not be obtained after curing; the inhibition rate of Navicula was 89.69%, and the inhibition rate of Nitzschia closterium f. minutissima was 84.33%; the inhibition rate of Escherichia coli was 79.56%, the inhibition rate of Staphylococcus aureus was 42.76%, and the inhibition rate of Pseudomonas pseudoalteromonas Xiamenensis was 91.99%.

[0064] Example 2

[0065] Referring to Example 1, the difference from Example 1 is that for a crosslinked amphiphilic acrylate marine antifouling coating in this example, during the preparation process, the addition amount of amino-terminated polydimethylsiloxane was 0.25 g, and the rest of the methods remained unchanged as shown in Example 1.

[0066] Test was carried out according to the test method of Example 1, see Figures 1 - 6 As shown, the results were: the inhibition rate of Navicula was 89.73%, and the inhibition rate of Nitzschia closterium f. minutissima was 86.7%; the inhibition rate of Escherichia coli was 88.06%, the inhibition rate of Staphylococcus aureus was 61.46%, and the inhibition rate of Pseudomonas pseudoalteromonas Xiamenensis was 95.21%; the tensile strength and elongation at break were 1.34 MPa and 198% respectively.

[0067] Example 3

[0068] Referring to Example 1, the difference from Example 1 is that for a crosslinked amphiphilic acrylate marine antifouling coating in this example, during the preparation process, the addition amount of amino-terminated polydimethylsiloxane is 0.5 g, and the remaining methods remain unchanged as shown in Example 1.

[0069] Test was carried out according to the test method of Example 1, see Figures 1 - 6 As shown, the results are as follows: the inhibition rate of Navicula is 89.76%, the inhibition rate of Nitzschia closterium f. minutissima is 87.7%; the inhibition rate of Escherichia coli is 94.1%, the inhibition rate of Staphylococcus aureus is 67.4%, and the inhibition rate of Pseudalteromonas xiamenensis is 95.51%; the tensile strength and elongation at break are 1.70 MPa and 161% respectively.

[0070] Example 4

[0071] Referring to Example 1, the difference from Example 1 is that for a crosslinked amphiphilic acrylate marine antifouling coating in this example, during the preparation process, the addition amount of amino-terminated polydimethylsiloxane is 0.75 g, and the remaining methods remain unchanged as shown in Example 1.

[0072] Test was carried out according to the test method of Example 1, see Figures 1 - 6 As shown, the results are as follows: the inhibition rate of Navicula is 90.66%, the inhibition rate of Nitzschia closterium f. minutissima is 90.23%; the inhibition rate of Escherichia coli is 95.2%, the inhibition rate of Staphylococcus aureus is 74.8%, and the inhibition rate of Pseudalteromonas xiamenensis is 96.05%; the tensile strength and elongation at break are 2.02 MPa and 128% respectively.

[0073] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiments or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A crosslinked amphiphilic acrylate marine antifouling coating, characterized in that, the structural formula of the antifouling coating is as follows: In the above formula, r1, r2, r3, r4, and r5 are the number of repeating units of random copolymerization, all of which are natural numbers greater than 1; the monomer repeated by r1 is glycidyl methacrylate; the monomer repeated by r2 is methyl methacrylate; the monomer repeated by r3 is polyethylene glycol methyl ether methacrylate, where n is a natural number between 26 and 30; the monomer repeated by r4 is 2-hydroxyethyl acrylate; the monomer repeated by r5 is isobornyl acrylate; the wavy line in the above structural formula represents the remaining structure of amino-terminated polydimethylsiloxane without a double-NH 2 functional group, where m is the number of repeating units of siloxane, and m is a natural number from 10 to 25; The preparation method of the crosslinked amphiphilic acrylate marine antifouling coating comprises the following steps: S1. Preparation of amphiphilic acrylate polymer: Add 15 - 25 parts by mass of xylene and 5 - 10 parts by mass of N-N-dimethylformamide into a round-bottomed flask equipped with a thermometer, a magnetic stirrer and a condenser, and introduce nitrogen; preheat to 85 - 90 °C, and mix 4 - 7 parts by mass of xylene, 9 - 11 parts by mass of N-N-dimethylformamide, 10 - 14 parts by mass of glycidyl methacrylate, 20 - 23 parts by mass of methyl methacrylate, 4 - 7 parts by mass of polyethylene glycol methyl ether methacrylate, 10 - 14 parts by mass of 2-hydroxyethyl acrylate, 8 - 11 parts by mass of isobornyl acrylate, and 0.4 - 1 part by mass of initiator evenly, and slowly dropwise add the above mixed liquid; after the dropping is completed, dropwise add a mixed solution of 0.1 - 0.3 part by mass of benzoyl peroxide and 4 - 7 parts by mass of xylene, and keep warm for 1 - 2 h after the dropping is completed to obtain an amphiphilic acrylate polymer; S2. Preparation of crosslinked amphiphilic acrylate marine antifouling coating: Weigh 8 - 11 parts by mass of amphiphilic acrylate polymer and 4 - 6 parts by mass of xylene solvent into a container and stir evenly; add 0.1 - 2 parts by mass of amino-terminated polydimethylsiloxane to the above mixed solution, and react fully under a nitrogen atmosphere. After the reaction is completed, a crosslinked amphiphilic acrylate antifouling coating is obtained.

2. A preparation method of the crosslinked amphiphilic acrylate marine antifouling coating according to claim 1, characterized in that, it comprises the following steps: S1. Preparation of amphiphilic acrylate polymer: Add 15 - 25 parts by mass of xylene and 5 - 10 parts by mass of N-N-dimethylformamide into a round-bottomed flask equipped with a thermometer, a magnetic stirrer and a condenser, and introduce nitrogen; preheat to 85 - 90 °C, and mix 4 - 7 parts by mass of xylene, 9 - 11 parts by mass of N-N-dimethylformamide, 10 - 14 parts by mass of glycidyl methacrylate, 20 - 23 parts by mass of methyl methacrylate, 4 - 7 parts by mass of polyethylene glycol methyl ether methacrylate, 10 - 14 parts by mass of 2-hydroxyethyl acrylate, 8 - 11 parts by mass of isobornyl acrylate, and 0.4 - 1 part by mass of initiator evenly, and slowly dropwise add the above mixed liquid; after the dropping is completed, dropwise add a mixed solution of 0.1 - 0.3 part by mass of benzoyl peroxide and 4 - 7 parts by mass of xylene, and keep warm for 1 - 2 h after the dropping is completed to obtain an amphiphilic acrylate polymer; S2. Preparation of crosslinked amphiphilic acrylate marine antifouling coating: Weigh 8 - 11 parts by mass of amphiphilic acrylate polymer and 4 - 6 parts by mass of xylene solvent into a container and stir evenly; add 0.1 - 2 parts by mass of amino-terminated polydimethylsiloxane to the above mixed solution, and react fully under a nitrogen atmosphere. After the reaction is completed, a crosslinked amphiphilic acrylate antifouling coating is obtained.

3. According to the preparation method of the crosslinked amphiphilic acrylate marine antifouling coating described in claim 2, characterized in that, In S1, the initiator is one or both of azobisisobutyronitrile and azobis(isovaleronitrile).

4. The preparation method of the crosslinked amphiphilic acrylate marine antifouling coating according to claim 2, characterized in that, in S1, the above-mentioned mixed liquid is added dropwise uniformly with a constant pressure dropping funnel for 3 h.

5. The preparation method of the crosslinked amphiphilic acrylate marine antifouling coating according to claim 2, characterized in that, in S2, the reaction is carried out for 4 h under a nitrogen atmosphere at 60 °C.

6. The preparation method of the crosslinked amphiphilic acrylate marine antifouling coating according to claim 2, characterized in that, it further includes S3. The coating prepared in S2 is spin-coated on the surface of the substrate and heated for curing.

7. The preparation method of the crosslinked amphiphilic acrylate marine antifouling coating according to claim 6, characterized in that, in S3, the spin-coating speed is set at 1500 - 2000 rmp.

8. The preparation method of the crosslinked amphiphilic acrylate marine antifouling coating according to claim 6, characterized in that, in S3, the curing temperature is 80 °C.

9. The application of the crosslinked amphiphilic acrylate marine antifouling coating according to claim 1 on the surface of a ship.

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