Bionic antifogging coating as well as preparation method and application thereof

Abstract

The invention relates to the technical field of multifunctional coatings, in particular to a bionic antifogging coating and a preparation method and application thereof, and the bionic antifogging coating is mainly formed by amino-containing hydrophilic polysaccharide and a hydrophobic epoxy group stabilizer through nucleophilic ring-opening reaction. By simulating the micro-nano structure and components of the cornea of a mammal, amino in hydrophilic polysaccharide is used as a nucleophile to attack an epoxy group in a hydrophobic epoxy group stabilizer, a nucleophilic ring-opening reaction is carried out, and the obtained bionic anti-fog coating has very strong environmental adaptability, can resist fog for a long time in a temperature range of 25-100 DEG C, and has a good anti-fog effect on the cornea of the mammal. The method is not influenced by environmental humidity or temperature change, and shows extremely high environmental adaptability; moreover, the bionic anti-fog coating has the characteristics of flexibility and bendability, can easily adapt to the application limitations of transparent device surfaces with various curvatures and shapes and far super-hydrophobic coatings, and keeps higher total transmittance and lower diffuse transmittance and haze in a visible light range.

Description

Technical Field

[0001] The invention relates to the technical field of multifunctional coatings, and in particular to a bionic anti-fog coating and a preparation method and application thereof. Background Art

[0002] The problem of icing and fogging at the interface not only troubles academia and industry, but also greatly affects people's daily lives. For example, in industries such as transportation, energy, aerospace, agricultural production, medical devices, autonomous driving, video shooting, security monitoring, and polar expeditions, icing and fogging caused by meteorological conditions not only reduce the operating efficiency and safety of the equipment, but also easily lead to accident risks. Traditional anti-fogging strategies including mechanical wiping, heating, and humidity control have been widely adopted in various industries and our daily lives. Unfortunately, these methods have certain limitations, such as the need for complex machinery and expensive equipment.

[0003] Coatings with adjustable surface wettability are a low-cost and versatile method to establish anti-fogging properties on different surfaces. In the past two decades, both superhydrophobic and superhydrophilic coatings have been studied for anti-fogging applications. For example, superhydrophobic anti-fogging coatings mainly rely on external mechanical forces to drive water droplets to roll off low surface energy surfaces. This method helps to maintain the transparency and anti-fogging properties of the material under various environmental conditions, thereby improving the reliability of the material in practical applications. However, due to its short duration, it is generally unacceptable; in addition, the preparation of superhydrophobic surfaces requires expensive equipment and complex processing technology, which further limits its applicability. Another anti-fogging strategy is to construct a superhydrophilic surface to promote the spreading of droplets on the surface. However, the mechanical instability caused by the swelling of superhydrophilic coatings often leads to reduced transparency under high humidity or rapidly changing temperature conditions.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a bionic anti-fog coating and a preparation method and application thereof, aiming to solve the problems of the existing anti-fog coatings such as short anti-fog time, fast failure and easy damage.

[0006] The technical solution of the present invention is as follows:

[0007] A bionic anti-fog coating is mainly formed by a hydrophilic polysaccharide containing an amino group and a hydrophobic epoxy group stabilizer through a nucleophilic ring-opening reaction.

[0008] The bionic anti-fog coating, wherein the mass ratio of the hydrophilic polysaccharide containing amino groups to the hydrophobic epoxy group stabilizer is (0.25-1):(0.25-1).

[0009] In the bionic anti-fog coating, the hydrophilic polysaccharide containing amino groups includes one or more of N-methyl-D-glucosamine, hyaluronic acid, chitosan, and sodium alginate.

[0010] In the bionic anti-fog coating, the hydrophobic epoxy group stabilizer includes one or more of glycidyl methacrylate, methyl methacrylate, and ethylene glycol methacrylate.

[0011] The bionic anti-fog coating has a thickness of 20 μm-200 μm.

[0012] A method for preparing a bionic anti-fog coating comprises the following steps:

[0013] The hydrophilic polysaccharide containing amino groups, the hydrophobic epoxy group stabilizer and water are mixed, and the anti-fogging liquid is obtained through a nucleophilic ring-opening reaction;

[0014] The anti-fog liquid is injected into a mold with a predetermined gap, and after solidification and separation, a bionic anti-fog coating is obtained.

[0015] The method for preparing the bionic anti-fog coating, wherein the method for preparing the mold with a predetermined gap comprises the steps of:

[0016] Mixing a lipophilic silicone resin monomer silane coupling agent, an acidic solution and water to obtain a surface treatment solution;

[0017] Using the surface treatment liquid to treat the substrate to obtain a treated substrate;

[0018] A cover sheet is placed on the treated substrate and a predetermined gap is retained to obtain a mold with a predetermined gap.

[0019] The preparation method of the bionic anti-fog coating, wherein the lipophilic silicone resin monomer silane coupling agent includes one or more of 1,3-(triethoxysilyl)propyl methacrylate, 3-(methyldiethoxysilyl)propyl methacrylate, vinyltrimethoxysilane, 3-(trimethoxymethylsilyl)propyl methacrylate, and methacryloxypropyltrimethoxysilane.

[0020] The method for preparing the bionic anti-fog coating, wherein the volume ratio of the lipophilic silicone resin monomer silane coupling agent to the acidic solution is (100:1)-(50:1).

[0021] The invention discloses an application of a bionic anti-fog coating in lenses of glasses, goggles or swimming goggles.

[0022] Beneficial effects: The present invention provides a bionic anti-fog coating and a preparation method and application thereof. The bionic anti-fog coating is mainly formed by a hydrophilic polysaccharide containing an amino group and a hydrophobic epoxy group stabilizer through a nucleophilic ring-opening reaction. The present invention simulates the micro-nano structure and components of the cornea of ​​a mammal, uses the amino group (-NH2) in the hydrophilic polysaccharide as a nucleophile to attack the epoxy group in the hydrophobic epoxy group stabilizer, and a nucleophilic ring-opening reaction occurs, so that the epoxy group is ring-opened and forms a new bond with the amino group. The final product contains a hydroxyl group and an amino-modified hydrophobic epoxy group stabilizer structure. The obtained bionic anti-fog coating has a strong environmental adaptability, can be anti-fogging for a long time within a temperature range of 25°C-100°C, is not affected by environmental humidity or temperature changes, and exhibits a strong environmental adaptability; and the bionic anti-fog coating has the characteristics of flexibility and bendability, and can easily adapt to the surface of transparent equipment of various curvatures and shapes, far exceeding the application limitations of super hydrophobic coatings. At the same time, the bionic anti-fog coating formed by nucleophilic ring-opening reaction using hydrophilic polysaccharides containing amino groups and hydrophobic epoxy group stabilizers maintains a high total transmittance (>90%) and low diffuse transmittance (<5%) and haze (<5%) in the visible light range. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the process of preparing a bionic anti-fog coating according to Example 1 of the present invention;

[0024] Figure 2 The AFM images of the surface morphology of the bionic anti-fog coating after drying and swelling prepared in Example 1;

[0025] Figure 3 The anti-fog effect diagram of the bionic anti-fog coating on different substrates and the original substrate;

[0026] Figure 4 The total light transmittance, diffuse transmittance and haze test data of the bionic anti-fog coating prepared in Example 1 on different materials;

[0027] Figure 5 This is the total transmittance test diagram of the bionic anti-fog coating at different temperatures;

[0028] Figure 6 This is the contact angle test diagram of the bionic anti-fog coating;

[0029] Figure 7 This is the surface wettability test diagram of the bionic anti-fog coating. DETAILED DESCRIPTION

[0030] The present invention provides a bionic anti-fog coating and a preparation method and application thereof. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0032] The anti-fog coatings currently on the market mainly rely on hydrophilic materials, super-hydrophobic coatings or other chemical modification technologies. However, these traditional methods have many problems in practical applications; for example, although hydrophilic coatings can effectively prevent fog in a short period of time, under high humidity or long-term use conditions, the coating is prone to water saturation or shedding, resulting in a rapid decrease in the anti-fog effect. Super-hydrophobic coatings have attracted widespread attention due to their beneficial water droplet sliding properties, but they are often difficult to continuously and effectively prevent fog condensation in high humidity environments, and because tiny water droplets are easily formed on their surface, they affect the light transmittance of transparent materials. In addition, super-hydrophobic coatings are usually fragile and are not suitable for surfaces that require bending or complex shapes, which limits their possibility in a wide range of applications.

[0033] Based on this, the present invention provides a bionic anti-fog coating, which is mainly formed by a hydrophilic polysaccharide containing an amino group and a hydrophobic epoxy group stabilizer through a nucleophilic ring-opening reaction.

[0034] In this embodiment, by simulating the micro-nano structure and composition of the cornea of ​​a mammal, the amino group (-NH2) in the hydrophilic polysaccharide is used as a nucleophile to attack the epoxy group in the hydrophobic epoxy group stabilizer, and a nucleophilic ring-opening reaction occurs, so that the epoxy group is opened and forms a new bond with the amino group. The final product contains a hydroxyl group and an amino-modified hydrophobic epoxy group stabilizer structure, and the obtained biomimetic anti-fog coating has a strong environmental adaptability, which can be long-term anti-fog in the temperature range of 25°C-100°C, and is not affected by environmental humidity or temperature changes, showing a strong environmental adaptability; and the biomimetic anti-fog coating has the characteristics of flexibility and bendability, and can easily adapt to the surface of transparent equipment of various curvatures and shapes, far exceeding the application limitations of super-hydrophobic coatings. At the same time, the biomimetic anti-fog coating formed by the nucleophilic ring-opening reaction of the hydrophilic polysaccharide containing amino groups and the hydrophobic epoxy group stabilizer maintains a high total transmittance (>90%) and a low diffuse transmittance (<5%) and haze (<5%) in the visible light range.

[0035] Specifically, the bionic anti-fog coating not only has excellent anti-fog effect, but also has significant advantages such as high light transmittance, wide applicability, simple preparation process and no need for expensive equipment. The bionic anti-fog coating can still maintain the anti-fog performance of transparent materials in high humidity and dynamic environments.

[0036] In some embodiments, the mass ratio of the hydrophilic polysaccharide containing amino groups to the hydrophobic epoxy group stabilizer is (0.25-1): (0.25-1). For example, the mass ratio of the hydrophilic polysaccharide containing amino groups to the hydrophobic epoxy group stabilizer can be, but is not limited to, 1:1, 1:0.75, 1:0.5, 1:0.25, 0.75:1, 0.5:1, 0.25:1, etc. It is found through testing that the greater the hydrophilic ratio, the worse the mechanical properties of the bionic anti-fog coating, and the greater the hydrophobic ratio, the worse the transmittance of the bionic anti-fog coating. The mass ratio of the hydrophilic polysaccharide containing amino groups to the hydrophobic epoxy group stabilizer is controlled between (0.25-1): (0.25-1), so that the bionic anti-fog coating has better mechanical properties and higher transmittance.

[0037] In a preferred embodiment, the mass ratio of the hydrophilic polysaccharide containing amino groups to the hydrophobic epoxy group stabilizer is 1:1. When the ratios are equal, the mechanical properties and light transmittance of the bionic anti-fog coating are optimized.

[0038] In some embodiments, the hydrophilic polysaccharide containing amino groups includes but is not limited to one or more of N-methyl-D-glucosamine, hyaluronic acid, chitosan, and sodium alginate. The above hydrophilic polysaccharide contains amino groups. After mixing with the hydrophobic epoxy group stabilizer, the amino group can be used as a nucleophile to attack the epoxy group in the hydrophobic epoxy group stabilizer, and a nucleophilic ring-opening reaction occurs, so that the epoxy group opens and forms a new bond with the amino group. The final product contains a hydroxyl group and an amino-modified hydrophobic epoxy group stabilizer structure, and the obtained bionic anti-fog coating has a strong environmental adaptability.

[0039] In some embodiments, the hydrophobic epoxy group stabilizer includes, but is not limited to, one or more of glycidyl methacrylate, methyl methacrylate, and ethylene glycol methacrylate.

[0040] In some embodiments, the thickness of the bionic anti-fog coating is 20 μm-200 μm. A coating that is too thin has insufficient surface hardness, while a coating that is too thick will affect the light transmittance of the coating and cause image deformation. Controlling the thickness of the bionic anti-fog coating between 20 μm and 200 μm can make the coating flexible and bendable, and can easily adapt to transparent equipment surfaces of various curvatures and shapes, far exceeding the application limitations of super-hydrophobic coatings, and also has good mechanical properties.

[0041] In a preferred embodiment, the thickness of the bionic anti-fog coating is 20 μm-100 μm. The bionic anti-fog coating at this thickness has the best mechanical properties and has good flexibility and light transmittance; more preferably, the thickness of the bionic anti-fog coating is 100 μm.

[0042] In addition, the present invention also provides a method for preparing a bionic anti-fog coating, comprising the steps of:

[0043] Step S10: mixing a hydrophilic polysaccharide containing an amino group, a hydrophobic epoxy group stabilizer and water, and performing a nucleophilic ring-opening reaction to obtain an anti-fogging liquid;

[0044] Step S20: injecting the anti-fog liquid into a mold with a predetermined gap, and obtaining a bionic anti-fog coating after solidification and separation.

[0045] In this embodiment, the bionic anti-fog coating preparation process is simple, does not require expensive instruments and equipment, significantly reduces the production cost, and has the potential for large-scale production and promotion. In general, the bionic anti-fog coating prepared by this preparation method effectively overcomes the limitations of existing anti-fog technology through multiple innovations in anti-fog performance, applicability and production process, and provides a more economical, reliable and widely applicable solution with broad market application prospects.

[0046] Specifically, inspired by the wetting mechanism of mammalian cornea, by simulating the composition and structure of the corneal surface, the bionic anti-fog coating is formed by using a hydrophilic polysaccharide containing amino groups and a hydrophobic epoxy group stabilizer to form a copolymer chain through a nucleophilic ring-opening reaction. It can maintain excellent optical clarity under extreme fogging or frosting conditions. The bionic anti-fog coating not only performs well in anti-fog effect, but also has significant advantages such as high light transmittance, wide applicability, simple preparation process and no need for expensive equipment. In addition, the coating is flexible and bendable, and can easily adapt to the surface of transparent equipment of various curvatures and shapes, far exceeding the application limitations of super hydrophobic coatings.

[0047] In some embodiments, the method for preparing the mold with a predetermined gap comprises the steps of:

[0048] Step S100: mixing a lipophilic silicone resin monomer silane coupling agent, an acidic solution and water to obtain a surface treatment solution;

[0049] Step S200: using the surface treatment liquid to treat the substrate to obtain a treated substrate;

[0050] Step S300: Covering the processed substrate with a cover sheet and retaining a predetermined gap to obtain a mold with a predetermined gap.

[0051] In this embodiment, when preparing the bionic anti-fog coating, a lipophilic silicone resin monomer silane coupling agent is used as an anchoring layer, so that the bionic anti-fog coating can be stably loaded on the surface of the substrate, and the bionic anti-fog coating is successfully prepared on the surface of the substrate.

[0052] Specifically, the width of the predetermined gap is controlled by using a support material with a thickness between 20 μm and 200 μm, thereby controlling the thickness of the coating. Preferably, the thickness of the support material is between 20 μm and 100 μm.

[0053] In some embodiments, the lipophilic silicone monomer silane coupling agent includes, but is not limited to, one or more of 1,3-(triethoxysilyl)propyl methacrylate, 3-(methyldiethoxysilyl)propyl methacrylate, vinyl trimethoxysilane, 3-(trimethoxymethylsilyl)propyl methacrylate, and methacryloxypropyl trimethoxysilane. By using the above lipophilic silicone monomer silane coupling agent as the anchoring layer of the bionic anti-fog coating, the bionic anti-fog coating can be stably loaded on the surface of the substrate, and has the characteristics of flexibility and bendability, and can easily adapt to the transparent equipment surfaces of various curvatures and shapes.

[0054] In some embodiments, the volume ratio of the lipophilic silicone resin monomer silane coupling agent to the acidic solution is (100:1)-(50:1). Too large a volume ratio will cause the treated substrate to turn white, while too small a volume ratio will cause the substrate adhesion to decrease. Controlling the volume ratio between (100:1)-(50:1) can provide a stronger adhesion force for the biomimetic anti-fog coating and prevent the coating from falling off.

[0055] In some embodiments, the acidic solution includes but is not limited to acetic acid, low concentration hydrochloric acid, hydrofluoric acid and oxalic acid, etc., and low concentration refers to a concentration between 0.1M and 1M.

[0056] In some embodiments, the substrate includes, but is not limited to, one of a glass sheet, polyethylene terephthalate, polymethyl methacrylate, and polydimethylsiloxane.

[0057] In addition, the present invention also provides an application of a bionic anti-fog coating in glasses, goggles or swimming goggles. The bionic anti-fog coating formed by a nucleophilic ring-opening reaction using a hydrophilic polysaccharide containing an amino group and a hydrophobic epoxy group stabilizer can be used in glasses, goggles or swimming goggles to maintain a relatively high total transmittance (>90%) and a relatively low transmittance (<5%) and haze (<5%) in the visible light range.

[0058] The following examples are further given to illustrate the present invention in detail. It should also be understood that the following examples are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention belong to the scope of protection of the present invention.

[0059] Example 1

[0060] This embodiment provides a bionic anti-fog coating, such as Figure 1 As shown, the specific preparation steps are as follows:

[0061] 1) Preparation of anti-fog liquid

[0062] N-methyl-D-glucamine, glycidyl methacrylate and water are reacted in equal proportions, and after the reaction is completed, ultrasonication is performed to obtain an anti-fog liquid.

[0063] 2) Preparation of surface treatment solution

[0064] 300 ml of deionized water was added to a 500 ml beaker, and 6 ml of methacryloxypropyltrimethoxysilane and 60 ul of acetic acid were added thereto. The beaker was then placed in an ultrasonic instrument and stirred until the sample solution was evenly mixed and clarified to obtain a surface treatment solution.

[0065] 3) Surface treatment of glass

[0066] Treat the glass with plasma gas for 15 minutes, place the glass with the front side facing up (side A) into the treatment solution and immerse it for 2 hours, then take out the glass sheet, rinse it with deionized water, and use it after drying.

[0067] 4) Preparation of coating

[0068] Place the treated glass sheet (A side) on the platform with the surface facing up, fix it with a 100μm support material, cover the untreated new glass sheet on the treated glass sheet, fill the anti-fog liquid between the glass sheets by solution injection, place it under ultraviolet light for 20 minutes, and separate the cover glass from the sample after the light exposure. Dry the surface moisture in a 60℃ oven and dry it in a vacuum drying oven for 24 hours to obtain the bionic anti-fog coating.

[0069] The transmittance and AFM of the bionic anti-fog coating prepared in this embodiment were tested, and the test results showed that the bionic anti-fog coating has a wide range of application potential in long-term and continuous anti-fog scenarios. Figure 2 As shown by Figure 2 It can be seen that the surface morphology of the bionic anti-fog coating is very smooth, and in the hydrated state, the surface roughness does not change significantly compared with the dry state.

[0070] In addition, the bionic cornea gel can be applied to different substrate materials. Figure 3 As shown, including PMMA, PDMS, PET and glass. The experimental results show that after the substrate with anti-fog coating encounters water fog, the bottom pattern is still clearly visible, while the untreated material cannot be clearly displayed under the same conditions.

[0071] Specifically, transparency is an important indicator for evaluating the performance of anti-fog coatings. Generally, coatings with a transparency of less than 85% will limit their application in the optical field. In order to verify the optical properties of the bionic anti-fog coating, this example conducted a 1-hour diffuse transmittance and haze test on bionic corneal gels (i.e., bionic anti-fog coatings) on different substrates under 80°C hot steam conditions. The results are as follows: Figure 4 (in Figure 4 a and b in it represent the diffuse transmittance and haze test of the bionic anti-fog coating respectively; c and d represent the total light transmittance test under different substrates respectively). The results show that the bionic anti-fog coating maintains a relatively high total transmittance (>85%) and a relatively low diffuse transmittance (<5%) and haze (<5%) in the visible light range. It exhibits ultra-high optical performance. In order to verify the anti-fog effect of the bionic anti-fog coating, this embodiment conducted a 1-hour total transmittance test on the bionic corneal gel (i.e., bionic anti-fog coating) of different substrates under hot steam conditions at different temperatures. The results are shown in the figure. Figure 5 The results show that the light transmittance of the gel remains at a high level and does not change much during the test, indicating that it has excellent anti-fog performance.

[0072] Furthermore, the surface wettability of the bionic anti-fog coating prepared in Example 1 was verified by conducting a contact angle test (eg Figure 6 The test results show that the contact angle of the gel gradually decreases during the anti-fogging process and eventually approaches 0, indicating that the surface is in a super-wetting state. The process of droplets spreading on the gel surface captured by a high-speed camera (as shown in Figure 7 As shown), it was observed that droplets of aqueous solution containing methyl orange could spread evenly on the gel surface within tens of milliseconds, while the spreading effect was not obvious on the surface not coated with gel. This result further proves the significant anti-fog ability of the bionic anti-fog coating.

[0073] In summary, the present invention provides a bionic anti-fog coating and its preparation method and application, the bionic anti-fog coating is mainly formed by a hydrophilic polysaccharide containing an amino group and a hydrophobic epoxy group stabilizer through a nucleophilic ring-opening reaction. The present invention simulates the micro-nano structure and composition of the cornea of ​​a mammal, uses the amino group (-NH2) in the hydrophilic polysaccharide as a nucleophile to attack the epoxy group in the hydrophobic epoxy group stabilizer, and a nucleophilic ring-opening reaction occurs, so that the epoxy group is ring-opened and forms a new bond with the amino group, and the final product contains a hydroxyl group and an amino-modified hydrophobic epoxy group stabilizer structure, and the obtained bionic anti-fog coating has a strong environmental adaptability, can be anti-fogging for a long time in the temperature range of 25°C-100°C, is not affected by environmental humidity or temperature changes, and exhibits a strong environmental adaptability; and the bionic anti-fog coating has the characteristics of flexibility and bendability, and can easily adapt to the surface of transparent equipment of various curvatures and shapes, far exceeding the application limitations of super hydrophobic coatings. At the same time, the bionic anti-fog coating formed by nucleophilic ring-opening reaction using hydrophilic polysaccharides containing amino groups and hydrophobic epoxy group stabilizers maintains a high total transmittance (>90%) and low transmittance (<5%) and haze (<5%) in the visible light range.

[0074] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A bionic anti-fog coating, characterized in that: It is mainly formed by nucleophilic ring-opening reaction of hydrophilic polysaccharide containing amino group and hydrophobic epoxy group stabilizer.

2. The bionic anti-fog coating according to claim 1, characterized in that: The mass ratio of the hydrophilic polysaccharide containing amino groups to the hydrophobic epoxy group stabilizer is (0.25-1):(0.25-1).

3. The bionic anti-fog coating according to claim 1, characterized in that: The amino-containing hydrophilic polysaccharide includes one or more of N-methyl-D-glucosamine, hyaluronic acid, chitosan, and sodium alginate.

4. The bionic anti-fog coating according to claim 1, characterized in that: The hydrophobic epoxy group stabilizer includes one or more of glycidyl methacrylate, methyl methacrylate, and ethylene glycol methacrylate.

5. The bionic anti-fog coating according to claim 1, characterized in that: The thickness of the bionic anti-fog coating is 20 μm-200 μm.

6. A method for preparing a bionic anti-fog coating according to any one of claims 1 to 5, characterized in that: Includes steps: The hydrophilic polysaccharide containing amino groups, the hydrophobic epoxy group stabilizer and water are mixed, and the anti-fogging liquid is obtained through a nucleophilic ring-opening reaction; The anti-fog liquid is injected into a mold with a predetermined gap, and after solidification and separation, a bionic anti-fog coating is obtained.

7. The method for preparing the bionic anti-fog coating according to claim 6, characterized in that: The method for preparing the mold with a predetermined gap comprises the steps of: Mixing a lipophilic silicone resin monomer silane coupling agent, an acidic solution and water to obtain a surface treatment solution; Using the surface treatment liquid to treat the substrate to obtain a treated substrate; A cover sheet is placed on the treated substrate and a predetermined gap is retained to obtain a mold with a predetermined gap.

8. The method for preparing the bionic anti-fog coating according to claim 7, characterized in that: The lipophilic silicone resin monomer silane coupling agent includes one or more of 1,3-(triethoxysilyl)propyl methacrylate, 3-(methyldiethoxysilyl)propyl methacrylate, vinyltrimethoxysilane, 3-(trimethoxymethylsilyl)propyl methacrylate, and methacryloxypropyltrimethoxysilane.

9. The method for preparing the bionic anti-fog coating according to claim 7, characterized in that: The volume ratio of the lipophilic silicone resin monomer silane coupling agent to the acidic solution is (100:1)-(50:1).

10. Use of the bionic anti-fog coating according to any one of claims 1 to 5 in glasses, goggles or swimming goggles.

Images