A liquid polymer network on titanium alloy surface and its preparation method and application

Abstract

The present invention relates to the technical field of metal material surface treatment, in particular to a titanium alloy surface-like liquid polymer network and its preparation method and application. The preparation method comprises the following steps: polishing the titanium alloy surface; performing magnetron sputtering deposition on the titanium alloy; performing hydroxylation on the titanium alloy surface; immersing the titanium alloy in a KH560 ethanol solution and heating for reaction to obtain a first sample; immersing the first sample in a KH602 ethanol solution and allowing it to stand, drying to obtain a second sample; immersing the second sample in an ethanol solution of an epoxy-terminated cross-linking agent and heating for reaction to obtain. The titanium alloy surface-like liquid polymer network prepared by the present invention can achieve an anti-fouling effect without adding a lubricant or preparing a microstructure. Its anti-fouling performance will not fail due to wear of the material surface microstructure and loss of lubricant. It has a long-term and stable anti-fouling effect and is pollution-free to the environment. It can be used to prevent and control marine biological contamination of titanium alloys in marine environments.

Description

Technical Field

[0001] The present invention relates to the technical field of metal material surface treatment, in particular to a titanium alloy surface liquid polymer network and a preparation method and application thereof. Background Art

[0002] With the development of marine resources, marine biofouling has gradually become a major negative factor restricting the marine economy. Marine biofouling refers to damage to underwater facilities caused by the attachment and invasion of marine organisms. Marine biofouling can have many adverse effects. For example, for ships operating at sea, marine biofouling can increase the ship's resistance to navigation. Furthermore, fouling organisms can move with the ship, causing them to invade the hull, or travel with the water into water pipes, where they can clog and clog them. Therefore, preventing and controlling biofouling is a marine environmental issue of common concern to countries around the world.

[0003] To combat the adverse effects of marine biofouling on ships and marine structures, researchers have conducted extensive research. Traditional superhydrophobic surfaces primarily prevent marine organisms from attaching by trapping air layers within their surface microstructures, achieving this antifouling effect. However, researchers have discovered that by organically combining a material's surface microstructure with its chemical composition, it is possible to intelligently control the wettability of the surface, thereby achieving antifouling effects by altering the surface's wettability.

[0004] Among them, lubricant-infused porous surfaces are one of the branches of research on changing material surfaces. Lubricant-infused porous surfaces mainly rely on the capillary force and van der Waals force generated by the surface microstructure to lock the lubricant, forming a homogeneous and stable liquid film to replace the solid surface, and then forming a liquid-liquid interface, thereby achieving the effect of lubrication and liquid repulsion.

[0005] However, in high-pressure, high-humidity environments, traditional superhydrophobic surfaces can easily penetrate the air layer and penetrate the microstructure. The surface microstructure is also easily damaged by wear, leading to surface failure and affecting antifouling effectiveness. Furthermore, lubricant-infused porous surfaces face problems in practical applications, such as lubricant loss and poor stability, which also affect their antifouling effectiveness.

[0006] Therefore, how to produce a liquid-like surface on a metal surface through a simple preparation process, which will not fail due to wear of the microstructure on the surface of the material, has a long-term and stable anti-fouling effect, and is environmentally friendly and pollution-free, so that it can be used to prevent and control marine biological contamination of metal materials in the marine environment, is the technical difficulty that those skilled in the art are committed to solving. Summary of the Invention

[0007] In order to solve the deficiencies of the prior art mentioned in the above background technology, the present invention provides a method for preparing a liquid polymer network on the surface of a titanium alloy, and its technical solution is as follows:

[0008] The present invention provides a method for preparing a liquid polymer network on a titanium alloy surface, which comprises the following steps:

[0009] The titanium alloy surface is polished to a roughness Ra of (200-500) nm;

[0010] The polished titanium alloy was subjected to magnetron sputtering deposition in an Ar atmosphere;

[0011] The surface of the titanium alloy after sputtering deposition is subjected to hydroxylation treatment;

[0012] Immersing the hydroxylated titanium alloy in an ethanol solution of γ-glycidyloxypropyltrimethoxysilane, heating the solution at 40-60° C. for 6-12 hours to obtain a first sample;

[0013] Immersing the first sample in an ethanol solution of N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane and allowing it to stand for 20 to 30 minutes, taking out the sample and drying it at 50 to 70° C. for 30 to 60 minutes to obtain a second sample;

[0014] The second sample is immersed in an ethanol solution of an epoxy-terminated cross-linking agent, and heated to 70-80° C. for reaction for 6-12 hours to obtain the liquid-like polymer network on the titanium alloy surface.

[0015] In some embodiments, a titanium alloy is placed in a magnetron sputtering device for sputtering deposition, the sputtering deposition target is a silicon target, and the target spacing is (60-80) mm; wherein, when the sputtering power is 300 W, the sputtering time is (5-10) min, and the flow rate of the sputtering gas Ar is (8-12) sccm;

[0016] In some embodiments, the titanium alloy is placed in a magnetron sputtering device for sputtering deposition, the sputtering deposition target is a silicon target, and the target spacing is (60-80) mm; wherein, when the sputtering power is 200 W, the sputtering time is (5-10) min, and the flow rate of the sputtering gas Ar is (10-12) sccm

[0017] In some embodiments, a titanium alloy is placed in a magnetron sputtering device for sputtering deposition, the sputtering deposition target is a silicon target, and the target spacing is (60-80) mm; wherein, when the sputtering power is 100 W, the sputtering time is (5-10) min, and the flow rate of the sputtering gas Ar is (10-12) sccm.

[0018] In some embodiments, the titanium alloy is placed in a magnetron sputtering device for sputtering deposition; wherein the sputtering deposition target is a high-purity silicon target, the target spacing is 70 mm, the sputtering power is 200 W, the sputtering time is 10 min, and the flow rate of the sputtering gas Ar is 10 sccm.

[0019] In some embodiments, during the polishing process, the titanium alloy surface is polished using sandpaper.

[0020] In some embodiments, during the hydroxylation treatment, the titanium alloy is immersed in a potassium hydroxide aqueous solution for 1 to 2 hours to obtain hydroxyl groups on the metal surface; wherein the concentration of the potassium hydroxide aqueous solution is (0.1 to 1) mol / L.

[0021] In some embodiments, the titanium alloy after hydroxylation treatment is immersed in an ethanol solution of γ-glycidyloxypropyltrimethoxysilane, and heated in a water bath at 40-60°C for 6-12 hours to obtain a first sample; wherein the volume ratio of γ-glycidyloxypropyltrimethoxysilane to the ethanol solution of γ-glycidyloxypropyltrimethoxysilane is (5-10)%.

[0022] In some embodiments, the second sample is immersed in an ethanol solution of N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane with a pH of 4.5 to 5.5 and allowed to stand for 20 to 30 minutes. The sample is taken out and baked in an oven at 50 to 70°C for 30 to 60 minutes to obtain a second sample; wherein the volume ratio of N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane to the ethanol solution of N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane is 5% to 10%.

[0023] In some embodiments, the epoxy-terminated crosslinking agent is DGETPDMS; wherein the volume ratio of the epoxy-terminated crosslinking agent to the ethanol solution of the epoxy-terminated crosslinking agent is 5% to 15%.

[0024] The present invention also provides a titanium alloy surface liquid polymer network, which is prepared by the above-mentioned preparation method.

[0025] The present invention also provides applications of the titanium alloy surface-like liquid polymer network described above in ships, bridges, docks, offshore platforms, petroleum, chemical industry, transportation, aviation and various titanium metal structure surfaces.

[0026] Based on the above, compared with the prior art, the method for preparing a liquid polymer network on a titanium alloy surface provided by the present invention has the following beneficial effects:

[0027] The liquid polymer network on the titanium alloy surface prepared by the solution of the present invention can achieve an anti-fouling effect without adding lubricating fluid or preparing microstructures, avoiding problems such as lubricating fluid loss and microstructure wear. Its anti-fouling performance will not be invalidated due to microstructure wear on the material surface and lubricant loss. It has a long-term and stable anti-fouling effect and is pollution-free to the environment. It can be used to prevent and control marine biological contamination of titanium alloys in marine environments.

[0028] Other features and beneficial effects of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The objectives and other beneficial effects of the present invention can be achieved and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] Figure 1 Impedance spectra of Examples 1-7, Comparative Example 1, and Comparative Examples 5-10;

[0031] Figure 2 1 is a Fourier transform infrared spectrum of the untreated titanium alloy in Comparative Example 1 and the sample prepared in Example 1;

[0032] Figure 3 This is a graph showing the pollution status of the untreated titanium alloy in Comparative Example 1, the sample prepared in Comparative Example 2, and the sample prepared in Example 1 after 45 days of offshore hanging;

[0033] Figure 4 It is a contact angle test display diagram of the sample prepared in Comparative Example 3, the sample prepared in Comparative Example 4, and the sample prepared in Example 1. DETAILED DESCRIPTION

[0034] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that all terms used in the present invention (including technical terms and scientific terms) have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs, and should not be understood as limiting the present invention; it should be further understood that the terms used in the present invention should be understood to have meanings consistent with the meanings of these terms in the context of this specification and in the relevant fields, and should not be understood in an idealized or overly formal sense, unless explicitly defined as such in the present invention.

[0036] 1. The present invention provides the following embodiments and comparative examples:

[0037] Example 1 (200W-10min-10sccm)

[0038] Step 1

[0039] First, the surface roughness Ra of the titanium alloy plate TA24 was polished to 200 nm using sandpaper.

[0040] Step 2

[0041] The polished titanium alloy was placed in a magnetron sputtering device for sputtering deposition. The target material used was a high-purity silicon target, the target spacing was 70 mm, the sputtering power was 200 W, the sputtering time was 10 min, and the flow rate of the sputtering gas Ar was 10 sccm.

[0042] Step 3

[0043] The sputtered titanium alloy was immersed in a 0.5 mol / L potassium hydroxide aqueous solution for 1 hour to obtain abundant hydroxyl groups on the surface of the titanium alloy.

[0044] Step 4

[0045] The titanium alloy was immersed in an ethanol solution of γ-glycidyloxypropyltrimethoxysilane (KH560), heated to 60°C in a water bath, and maintained for 6 hours, so that KH560 and the abundant hydroxyl groups on the surface of the titanium alloy formed Si-O-Si bonds through dehydration condensation reaction.

[0046] The volume ratio of γ-glycidyloxypropyltrimethoxysilane to the γ-glycidyloxypropyltrimethoxysilane ethanol solution is 5%.

[0047] Step 5

[0048] The sample obtained in step 4 above was immersed in an ethanol solution of N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane (KH602) with a pH of 5 and allowed to stand at room temperature for 30 minutes. The sample was taken out and placed in an oven at 60°C for 30 minutes to allow the molecules to form molecular brushes in the air.

[0049] The volume ratio of N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane to the N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane ethanol solution is 10%.

[0050] Step 6

[0051] The sample obtained in step 5 above was immersed in an ethanol solution of epoxy-terminated crosslinker DGETPDMS, heated to 70° C. and reacted for 6 hours. The crosslinker and the KH602 molecular brushes were crosslinked to form a liquid-like polymer network.

[0052] The volume ratio of the epoxy-terminated cross-linking agent to the ethanol solution of the epoxy-terminated cross-linking agent is 10%.

[0053] Comparative Example 1

[0054] Titanium alloy plate TA24 without any treatment.

[0055] Comparative Example 2

[0056] The only difference from Example 1 is that only polishing and sputtering deposition steps are performed, and the subsequent hydroxylation treatment, coupling agent coupling treatment and cross-linking agent treatment steps are omitted (i.e., steps 3-6 are omitted). Other preparation processes and conditions are consistent with Example 1.

[0057] Comparative Example 3

[0058] The only difference from Example 1 is that in step 4, the soaking time in the KH560 ethanol solution is 1 hour, and the other preparation processes and conditions are the same as those in Example 1.

[0059] Comparative Example 4

[0060] The only difference from Example 1 is that in step 4, the soaking time in the KH560 ethanol solution is 3 hours, and the other preparation processes and conditions are the same as those in Example 1.

[0061] The present invention also conducts exploration on optimization of sputtering deposition process parameters as follows:

[0062] The only difference between each exploratory experimental group and Example 1 is that the process parameters of sputtering deposition are different. Other processes and conditions are consistent with Example 1. The specific process parameter settings of sputtering deposition are shown in Table 1 below:

[0063] Table 1

[0064]

[0065]

[0066] 2. Performance tests of the embodiments and comparative examples:

[0067] (1) Characterization of the anti-corrosion performance of experimental groups designed with different sputtering deposition process parameters

[0068] Test method or process: The samples prepared in the exploratory experimental group shown in Table 1 above were subjected to impedance spectroscopy testing in an electrochemical workstation.

[0069] Test results: Specific data are shown in Table 2 and Figure 1 As shown:

[0070] Table 2

[0071]

[0072] Among them, 10 -2 Hz is the frequency of potential scanning, and the |Z| value is expressed as the impedance value.

[0073] Analyzing the above data, we can see that:

[0074] Compared with the titanium alloy in Comparative Example 1 that has not been treated in any way, Examples 1-7 all have better surface corrosion resistance. Among them, the surface corrosion resistance of the material obtained in Example 1 (sputtering power of 200 W, argon flow rate of 10 sccm, sputtering time of 10 min) is stronger, and the sputtering deposition process of Example 1 is the preferred option.

[0075] (2) FTIR Fourier transform infrared spectrometer characterization (untreated titanium alloy and Example 1 sample)

[0076] Testing method or process: FT IR Fourier transform infrared spectrometer was used to characterize the chemical composition of the untreated titanium alloy in Comparative Example 1 and the sample prepared in Example 1.

[0077] The test results are as follows Figure 2 As shown:

[0078] Figure 2 In the figure, curve (a) shows the test results of the untreated titanium alloy in Comparative Example 1, and curve (b) shows the test results of the sample prepared in Example 1. It can be seen that the infrared spectrum of the titanium alloy surface after chemical grafting shows the characteristic absorption peaks of liquid-like surface molecules, indicating that the liquid-like polymer network has been successfully grafted onto the titanium alloy surface.

[0079] In addition, the FT IR Fourier transform infrared spectrum test graphs of Examples 2-7 also show characteristic absorption peaks of liquid-like surface molecules, indicating that the liquid-like polymer network has been successfully grafted onto the titanium alloy surface.

[0080] (3) Pollution after 45 days of offshore hanging (Example 1, Comparative Examples 1-2)

[0081] Test method or process: The specific test process or method for the anti-fouling performance of offshore panels is the shallow sea immersion test method for anti-fouling paint samples in GB53702007.

[0082] Test results:

[0083] Figure 3 The pollution status of titanium plates with different treatments after 45 days of hanging at sea can be seen:

[0084] Figure 3 (a) is a photo of the pollution of the titanium plate in comparative example 1 after 45 days of offshore hanging without any treatment, showing that large barnacles have attached to its surface;

[0085] Figure 3 (b) is a photo of the pollution of the titanium plate that was only polished and magnetron sputtered in Comparative Example 2 after 45 days of offshore hanging. It can be seen that there are no obvious barnacles attached to its surface, but there are a lot of algae on its surface.

[0086] Figure 3 (c) is a real-life picture of the pollution situation of the titanium plate with a liquid-like surface formed in Example 1 after 45 days of offshore hanging. It can be seen that there are no barnacles attached to its surface, and the degree of algae attached to its surface is also less than that in Figure (b), indicating that the construction of a liquid-like surface (i.e., the construction of a liquid-like polymer network) in Example 1 can effectively prevent and control marine biological pollution.

[0087] (4) Contact angle (Example 1, Comparative Examples 3-4)

[0088] Test method or process: The specific contact angle test process or method is GB / T 30693-2014.

[0089] Test results: Figure 4 The contact angles of the titanium plate were measured after being immersed in KH560 ethanol solution for different times. It can be seen that:

[0090] Figure 4 (a) is the contact angle diagram of the sample of comparative example 3 (titanium plate immersed in KH560 ethanol solution for 1 hour), and the measured contact angle is 10.848°;

[0091] Figure 4 (b) is the contact angle diagram of the sample of Comparative Example 4 (immersed in KH560 ethanol solution for 3 h), and the measured contact angle is 19.144°;

[0092] Figure 4 (c) is the contact angle diagram of the sample in Example 1 (immersed in KH560 ethanol solution for 6 h), and the measured contact angle is 37.644°;

[0093] It can be seen that compared with comparative examples 3-4, the sample of Example 1 has a larger contact angle, its hydrophobicity is improved, and it has better anti-fouling performance.

[0094] In summary, compared with the prior art, the method for preparing a liquid polymer network on a titanium alloy surface provided by the present invention includes the following design concepts and beneficial effects:

[0095] The purpose of the present invention is to provide a method for preparing a liquid polymer network on the surface of a titanium alloy to prevent marine biofouling of the titanium alloy in a marine environment. The design concept is:

[0096] (1) The present invention pre-polishes the titanium alloy surface, which helps to achieve uniform distribution of magnetron sputtered silicon atoms and subsequent network slip characteristics.

[0097] (2) After polishing, silicon atoms are sputtered on the surface of the titanium alloy using magnetron sputtering technology, which is beneficial to enhancing the bonding strength between the molecular brush and the substrate. In addition, the present application also optimizes and explores which magnetron sputtering process parameters are beneficial to further optimize and enhance the bonding strength between the molecular brush and the substrate after the titanium alloy is subsequently treated with hydroxylation, KH560 and KH602, and epoxy-terminated crosslinker DGETPDMS. Among them, the sputtering deposition process parameters of Example 1 (sputtering power 200W, argon flow rate 10sccm, sputtering time 10min) are the preferred choice;

[0098] Among them, if the hydroxylation treatment is directly performed without the sputtering deposition treatment, the surface hydroxyl groups will have a short existence period, and the bonding force between the molecular brush and the substrate will decrease.

[0099] (3) The titanium alloy deposited by magnetron sputtering was subjected to hydroxylation, KH560 and KH602, and epoxy-terminated crosslinker DGETPDMS treatment in sequence;

[0100] Among them, hydroxylation enables the titanium alloy surface to obtain abundant hydroxyl groups, which is beneficial to the improvement of grafting density; then KH560 and the abundant hydroxyl groups on the titanium alloy surface form Si-O-Si bonds through dehydration condensation reaction, among which Si iOS i bonds help to enhance the interfacial bonding strength; then it is treated with KH602 to make the KH602 molecules form molecular brushes in the air, and finally it is treated with epoxy-terminated crosslinker DGETPDMS to make the KH602 molecular brushes cross-link with each other to form a liquid-like polymer network, thereby making the network resistant to erosion.

[0101] Among them, the interaction between each step is indispensable. If the hydroxylation treatment is lacking, the reaction active sites will be lacking; if the KH560 treatment is lacking, the grafting density will be reduced; if the KH602 treatment is lacking, the network will lack flexibility, resulting in the inability of the network surface to slide, which will adversely affect the anti-fouling performance; if the epoxy-terminated crosslinker DGETPDMS treatment is lacking, the surface structure will be easily eroded and destroyed.

[0102] In summary, the liquid polymer network on the titanium alloy surface prepared by the scheme of the present invention can achieve the anti-fouling effect without adding lubricating fluid or preparing microstructures, avoiding problems such as lubricating fluid loss and microstructure wear. Its anti-fouling performance will not fail due to microstructure wear on the material surface and lubricant loss. It has a long-term and stable anti-fouling effect and is pollution-free to the environment. It can be used to prevent and control marine biological contamination of titanium alloys in the marine environment.

[0103] It should be noted that:

[0104] The volume ratio of the coupling agent ethanol solution and the cross-linking agent ethanol solution refers to the volume ratio of the coupling agent or the cross-linking agent in the solution;

[0105] γ-Glycidyloxypropyltrimethoxysilane is also known as KH560;

[0106] N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane is also known as KH602;

[0107] In this article, “~” is used to indicate a numerical range, and the range indicated by this expression includes two endpoint values.

[0108] The specific parameters or some commonly used reagents or raw materials in the above embodiments are specific embodiments or preferred embodiments of the present invention, but are not intended to limit the present invention. Those skilled in the art may make adaptive adjustments within the scope of the present invention.

[0109] In addition, unless otherwise specified, the raw materials used may also be conventional commercial products in the art, or prepared by conventional methods in the art; that is, the reagents and instruments used in this embodiment are not marked with information such as the manufacturer, and are all conventional products that can be purchased on the market.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing a liquid polymer network on the surface of a titanium alloy, characterized in that: The following steps are involved: The titanium alloy surface is polished to a roughness Ra of (200-500) nm; The polished titanium alloy was subjected to magnetron sputtering deposition in an Ar atmosphere; The surface of the titanium alloy after sputtering deposition is subjected to hydroxylation treatment; Immersing the hydroxylated titanium alloy in an ethanol solution of γ-glycidyloxypropyltrimethoxysilane, heating the solution at 40-60° C. for 6-12 hours to obtain a first sample; Immersing the first sample in an ethanol solution of N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane and allowing it to stand for 20 to 30 minutes, taking out the sample and drying it at 50 to 70° C. for 30 to 60 minutes to obtain a second sample; The second sample is immersed in an ethanol solution of an epoxy-terminated cross-linking agent, and heated to 70-80° C. for reaction for 6-12 hours to obtain the liquid-like polymer network on the titanium alloy surface.

2. The method for preparing a liquid polymer network on a titanium alloy surface according to claim 1, characterized in that: The titanium alloy is placed in a magnetron sputtering device for sputtering deposition, the sputtering deposition target is a silicon target, and the target spacing is (60-80) mm; Among them, when the sputtering power is 300W, the sputtering time is (5-10) min, and the flow rate of sputtering gas Ar is (8-12) sccm; and / or, when the sputtering power is 200 W, the sputtering time is (5-10) min, and the flow rate of the sputtering gas Ar is (10-12) sccm; And / or, when the sputtering power is 100 W, the sputtering time is (5-10) min, and the flow rate of the sputtering gas Ar is (10-12) sccm.

3. The method for preparing a liquid polymer network on a titanium alloy surface according to claim 1, wherein: The titanium alloy was placed in a magnetron sputtering device for sputtering deposition; wherein, the sputtering deposition target material was a high-purity silicon target, the target spacing was 70 mm, the sputtering power was 200 W, the sputtering time was 10 min, and the flow rate of the sputtering gas Ar was 10 sccm.

4. The method for preparing a liquid polymer network on a titanium alloy surface according to claim 1, wherein: During the polishing process, the surface of the titanium alloy is polished by sandpaper.

5. The method for preparing a liquid polymer network on a titanium alloy surface according to claim 1, wherein: During the hydroxylation treatment, the titanium alloy is immersed in a potassium hydroxide aqueous solution for 1 to 2 hours to obtain hydroxyl groups on the metal surface; Wherein, the concentration of the potassium hydroxide aqueous solution is (0.1-1) mol / L.

6. The method for preparing a liquid polymer network on a titanium alloy surface according to claim 1, wherein: Immersing the hydroxylated titanium alloy in an ethanol solution of γ-glycidyloxypropyltrimethoxysilane, heating the solution in a water bath at 40-60° C. for 6-12 hours to obtain a first sample; The volume ratio of γ-glycidyloxypropyltrimethoxysilane to the ethanol solution of γ-glycidyloxypropyltrimethoxysilane is (5-10)%.

7. The method for preparing a liquid polymer network on a titanium alloy surface according to claim 1, wherein: Immersing the second sample in an ethanol solution of N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane with a pH of 4.5 to 5.5 and allowing to stand for 20 to 30 minutes, taking out the sample and drying it in an oven at 50 to 70° C. for 30 to 60 minutes to obtain a second sample; The volume ratio of N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane to the ethanol solution of N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane is 5% to 10%.

8. The method for preparing a liquid polymer network on a titanium alloy surface according to claim 1, wherein: The epoxy-terminated cross-linking agent is DGETPDMS; The volume ratio of the epoxy-terminated cross-linking agent to the ethanol solution of the epoxy-terminated cross-linking agent is 5% to 15%.

9. A liquid polymer network on the surface of a titanium alloy, characterized by: The method is as described in any one of claims 1 to 8.

10. Application of the titanium alloy surface-like liquid polymer network according to claim 9 in ships, bridges, docks, offshore platforms, petroleum, chemical industry, transportation, aviation and various titanium metal structure surfaces.

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