Photosensitive resin composition, organic-inorganic hydrophilic antifogging antifouling coating prepared from photosensitive resin composition and application of photosensitive resin composition and organic-inorganic hydrophilic antifogging antifouling coating

Abstract

The invention discloses a photosensitive resin composition, an organic-inorganic hydrophilic antifogging antifouling coating prepared from the photosensitive resin composition and application of the organic-inorganic hydrophilic antifogging antifouling coating. Specifically, the organic modified silica sol and the zwitterionic monomer are added into the formula, so that the prepared photosensitive resin composition has hydrophilicity, and an antifouling coating prepared from the photosensitive resin composition has good long-acting stability and friction resistance.

Description

Technical Field

[0001] The invention belongs to the field of polymer materials, and in particular relates to a photosensitive resin composition and an organic-inorganic hydrophilic anti-fog and anti-fouling coating prepared therefrom and applications thereof. Background Art

[0002] Multifunctional surface materials with anti-fog and anti-fouling properties have broad application prospects in areas such as architectural glass, automotive glass (rearview mirrors), optical devices, and electronic device displays. Currently, commonly used anti-fog materials are generally obtained through surface hydrophilic modification, such as the use of nanoparticles (silicon dioxide, titanium dioxide, etc.) to form a super-hydrophilic surface to prevent fog accumulation. However, coating materials prepared by this method are extremely susceptible to chemical corrosion and UV aging, resulting in performance degradation; their anti-fouling and oil-proof properties are also poor, limiting their application scenarios. On the other hand, while fluorine-containing or silane-based coatings can reduce pollutant deposition through a hydrophobic effect, they can exacerbate fog formation and are more susceptible to pollutant adsorption in humid environments. Therefore, with the advancement of preparation technology and living needs, it is of great significance to prepare multifunctional surface materials with anti-fouling and anti-fog properties that are also environmentally friendly and have a long service life. Summary of the Invention

[0003] To address the difficulty in balancing antifouling and antifogging properties in the preparation of antifog materials in existing technologies, the present invention proposes a photosensitive resin composition, an organic-inorganic hydrophilic antifouling and antifouling coating prepared therefrom, and its applications. Specifically, by adding an organically modified silica sol and a zwitterionic monomer to the formulation, the present invention imparts hydrophilicity to the prepared photosensitive resin composition. The resulting antifouling coating exhibits excellent long-term stability and abrasion resistance.

[0004] One of the technical solutions of the present invention is to provide a photosensitive resin composition, comprising 20 to 50 parts by weight of an organically modified silica sol, 5 to 20 parts by weight of a zwitterionic monomer, 5 to 30 parts by weight of acrylic acid or methacrylic acid, 10 to 50 parts by weight of an acrylate or methacrylate monomer, 1 to 5 parts by weight of a photoinitiator, 1 to 5 parts by weight of a leveling agent, and 5 to 10 parts by weight of water; the organically modified silica sol is prepared by using an acid-catalyzed method to prepare a silica sol, followed by replacement with methanol, and finally modification with a silane coupling agent to obtain the organically modified silica sol; the silane coupling agent is one or more of 3-aminopropyltriethoxysilane, 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 3-(methacryloyloxy)propyltrimethoxysilane, methyltriethoxysilane, or vinyltrimethoxysilane; The preparation method of the zwitterionic monomer comprises the following steps: firstly reacting sodium hydroxide, 4-pyridine propionic acid and 5-bromo-1-pentanol in an organic solvent and treating the reacted product to obtain an intermediate product; then reacting the intermediate product with a catalyst and ethyl isocyanate acrylate in acetonitrile and treating the reacted product to obtain the zwitterionic monomer.

[0005] Furthermore, the preparation method of the organic modified silica sol is: (1) At room temperature, ethyl orthosilicate and ethanol were stirred for half an hour, water was added, and then an acidic catalyst was added dropwise. The pH of the reaction system was controlled at 2-3. After the addition was completed, the system was heated to 50 °C and reacted for 5 h. When the particle size was close to 30 nm, the reaction was stopped to obtain silica sol. (2) The silica sol is boiled at 100-120 °C, and methanol vapor is introduced with nitrogen or carbon dioxide. The displacement is stopped after the water content is monitored to be lower than 5%, thereby obtaining a methanol-dispersed silica sol; the temperature of the methanol vapor is preferably 80 °C; (3) After mixing and stirring the silane coupling agent, n-butanol and hydrochloric acid, add them dropwise to the silica sol dispersed in methanol; heat to 60 °C for reaction for 5 h, cool to room temperature and add propylene glycol methyl ether solution dropwise; then remove n-butanol and methanol by vacuum distillation at 55 °C to a solid content of 30%, and collect the product after filtering through a 1 μm filter membrane to obtain an organically modified silica sol.

[0006] The molar ratio of ethyl orthosilicate to ethanol is 2:1, and the molar ratio of water to ethyl orthosilicate is 1:1 to 3:1, preferably 2:1. The amount of silane coupling agent added is 1 wt% to 10 wt% of the amount of silica in the solvent, preferably 5 wt%. The amount of hydrochloric acid added is 0.5 wt% of the amount of silica in the solvent. The acidic catalyst is hydrochloric acid, nitric acid or acetic acid, etc., preferably an acid such as nitric acid that does not contain halogen ions. Specifically, the preferred acid concentration is 1 mol / L, and the added amount is 1 wt% of the amount of water added.

[0007] The boiling temperature of the silica sol is preferably 110°C.

[0008] The present invention selects a specific silane coupling agent with polymerizable double bonds. This method not only helps to improve the dispersion of silica particles in resin and zwitterion solution, but also can be grafted onto the polymer main chain through polymerization reaction, thereby improving the hydrophilicity, long-term stability and friction resistance of the coating.

[0009] Furthermore, the preparation method of the zwitterionic monomer is: (1) Dissolve 2 g of sodium hydroxide in 80 mL of an organic solvent at room temperature. After complete dissolution, add 7.56 g of 4-pyridinepropionic acid and 8.02 g of 5-bromo-1-pentanol. Then, react the mixture at 55-75 °C for 24 h. After the reaction is complete, wash the product by centrifugation and acetone, and dry it in vacuum at room temperature for 48 h to obtain an intermediate product. The organic solvent is formamide, butanone, tetrahydrofuran, or toluene, preferably formamide. The reaction temperature of pyridinepropionic acid and 5-bromo-1-pentanol is preferably 65 °C.

[0010] (2) The intermediate product was dissolved in 100 mL of acetonitrile at room temperature, 0.02 g of catalyst was added, and 5.36 g of ethyl isocyanate acrylate was added. The reaction was stirred at room temperature for 72 h, and the product was then centrifuged and washed with acetone to obtain a zwitterionic monomer. The catalyst was selected from the group consisting of triethylamine, stannous octoate, and dibutyltin dilaurate, preferably stannous octoate.

[0011] Ethyl isocyanate acrylate has numerous oxygen-containing groups, which can introduce multiple hydrogen bonds, enhancing the cohesive force and intermolecular forces of the polymerized coating. Furthermore, the presence of zwitterionic groups can form strong hydration reactions with water molecules, increasing the hydrophilicity of the coating, thereby effectively resisting the adsorption of pollutants and reducing coating contamination.

[0012] Furthermore, the acrylate monomer is one or more of polyurethane acrylate, amino acrylate, and ethoxylated pentaerythritol tetraacrylate, and the methacrylate monomer is one or more of ethoxylated pentaerythritol tetramethacrylate, polyurethane methacrylate, and amino methacrylate.

[0013] Furthermore, the photoinitiator is one or more of 2-hydroxy-2-methyl-1-phenylpropanone, 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone, and 1-hydroxy-cyclohexyl-phenylmethanone, preferably 2-hydroxy-2-methyl-1-phenylpropanone.

[0014] Furthermore, the leveling agent is one of a polyacrylate leveling agent and a silicone leveling agent.

[0015] The second technical solution of the present invention is to provide a method for preparing the above-mentioned photosensitive resin composition, which comprises mixing 20 to 50 parts by weight of an organically modified silica sol, 5 to 20 parts by weight of a zwitterionic monomer, 5 to 30 parts by weight of acrylic acid or methacrylic acid, 10 to 50 parts by weight of an acrylate or methacrylate monomer, 1 to 5 parts by weight of a photoinitiator, 1 to 5 parts by weight of a leveling agent, and 5 to 10 parts by weight of water and stirring for 2 hours.

[0016] A third technical solution of the present invention provides an organic-inorganic hydrophilic anti-fog and anti-fouling coating prepared from the above-mentioned photosensitive resin composition. The photosensitive resin composition is uniformly applied to one of glass, wood, or organic sheet materials by coating. After solvent volatilization, heating, and UV-induced curing, the organic-inorganic hydrophilic anti-fog and anti-fouling coating is obtained. The coating method can be one of flow coating, dip coating, and roller coating.

[0017] The solvent volatilization time is 10 minutes at room temperature and humidity of about 40% to 55%. The heating temperature is 60 to 80°C and the heating time is 1 to 3 minutes, preferably 2 minutes at 80°C.

[0018] The light source for UV-induced curing is an LED light source with a wavelength of 365 nm and an irradiation intensity of 441 mW cm at 10 cm. -2 , the illumination time is 0.5~2 h, preferably 1 h.

[0019] The fourth technical solution of the present invention is to provide the application of the above-mentioned organic-inorganic hydrophilic anti-fog and anti-fouling coating.

[0020] The benefits of the present invention are: 1) by preparing silica sol and performing organic modification, the present invention can introduce polymerizable double bonds while stably dispersing in an organic solvent. This method not only helps to improve the dispersion of silica particles in resin and zwitterionic solutions, but also can be grafted onto the polymer backbone through polymerization reaction, thereby improving the hydrophilicity, long-term stability and friction resistance of the coating.

[0021] 2) The present invention synthesizes zwitterions with long-chain multi-hydrogen bond structures, which can improve the hydrophilicity of the cured coating while improving its anti-fouling performance, overcoming the problems of traditional hydrophilic coatings with single functions and achieving stable anti-fog and anti-fouling performance. DETAILED DESCRIPTION

[0022] The following examples are used to further illustrate the present invention. Their purpose is to illustrate the present invention and should not be construed as limiting the scope of the present invention. Unless otherwise specified, all references are by weight and weight percentage.

[0023] Unless otherwise specified, the raw materials used in the present invention are conventional commercial products; the methods used in the present invention are conventional methods in the art unless otherwise specified.

[0024] The embodiments of the present invention are further described below with reference to a number of embodiments.

[0025] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0027] Example 1 Step S1: At room temperature, add 40 mL of ethyl orthosilicate and 5.2 mL of ethanol to a beaker. After stirring for half an hour, slowly add 6.45 mL of water, followed by the dropwise addition of 0.07 g of 1 mol / L nitric acid, maintaining the pH of the reaction system at approximately 2-3. After the addition is complete, the system is heated to 50°C and allowed to react for 5 hours. The reaction is terminated when the particle size approaches 30 nm. The resulting silica sol is then added to a flask and heated at 110°C to maintain a boiling state. Methanol vapor, generated by heating a separate flask to 80°C, is then continuously blown into the reactor containing the silica sol using nitrogen. The water content is measured by observing the liquid volume in the container in real time. The displacement is terminated when the water content is below 5%, yielding a methanol-dispersed silica sol.

[0028] Step S2: Mix 0.54 g of a silane coupling agent (KH570), 6 g of n-butanol, and 0.01 g of 1 mol / L hydrochloric acid and stir for 30 minutes. The mixture is then gradually added dropwise to the reaction system in Step S1. After the addition is complete, the temperature is raised to 60°C and the reaction is continued for 5 hours. The temperature is then rapidly cooled to room temperature, and the propylene glycol methyl ether solution is added dropwise. After the addition is complete, the n-butanol and methanol are removed from the system using a vacuum distillation apparatus, maintaining the system temperature at approximately 55°C, until the solids content reaches approximately 30%. A 1 μm filter is then used to remove large particles, and the product is collected to obtain an organically modified silica sol, which is stored in a cool, dark place.

[0029] Step S3: Dissolve 2 g of sodium hydroxide in 80 mL of formamide at room temperature. Once completely dissolved, add 7.56 g of 4-pyridinepropionic acid and 8.02 g of 5-bromo-1-pentanol. The mixture is then reacted at 75 °C for 24 h. After completion of the reaction, the product is centrifuged, washed with acetone, and dried under vacuum at room temperature for 48 h to obtain an intermediate product. Next, the intermediate product is dissolved in 100 mL of acetonitrile at room temperature, 0.02 g of stannous octoate, and 5.36 g of ethyl isocyanate acrylate are added. The reaction is stirred at room temperature for 72 h. The product is then centrifuged and washed with acetone to obtain the final zwitterionic monomer.

[0030] The reaction process of zwitterionic monomers is: .

[0031] The specific composition ratios of the photosensitive resin composition are shown in Table 1.

[0032] Example 2 Step S1: At room temperature, add 40 mL of ethyl orthosilicate and 5.2 mL of ethanol to a beaker. After stirring for half an hour, slowly add 3.21 mL of water, followed by the dropwise addition of 0.07 g of 1 mol / L nitric acid, maintaining the pH of the reaction system at approximately 2-3. After the addition is complete, the system is heated to 50°C and allowed to react for 5 hours. The reaction is terminated when the particle size approaches 30 nm. The resulting silica sol is then added to a flask and heated at 100°C to maintain a boiling solution. Methanol vapor, generated by heating a separate flask to 80°C, is then continuously blown into the reactor containing the silica sol using nitrogen. The water content is measured by observing the liquid volume in the container in real time. The displacement is terminated when the water content is below 5%, yielding a methanol-dispersed silica sol.

[0033] Step S2: Mix 0.05 g of a silane coupling agent (KH570), 0.5 g of n-butanol, and 0.01 g of 1 mol / L hydrochloric acid and stir for 30 minutes. The mixture is then gradually added dropwise to the reaction system in Step S1. After the addition is complete, the temperature is raised to 60°C and the reaction is continued for 5 hours. The temperature is then rapidly cooled to room temperature, and the propylene glycol methyl ether solution is added dropwise. After the addition is complete, the n-butanol and methanol are removed from the system using a vacuum distillation apparatus, maintaining the system temperature at approximately 55°C, until the solids content reaches approximately 30%. A 1 μm filter is then used to remove large particles, and the product is collected to obtain an organically modified silica sol, which is stored in a cool, dark place.

[0034] Step S3: Dissolve 2 g of sodium hydroxide in 80 mL of formamide at room temperature. Once completely dissolved, add 7.56 g of 4-pyridinepropionic acid and 8.02 g of 5-bromo-1-pentanol. The mixture is then reacted at 55°C for 24 hours. After completion of the reaction, the product is centrifuged, washed with acetone, and dried under vacuum at room temperature for 48 hours to obtain an intermediate product. Next, the intermediate product is dissolved in 100 mL of acetonitrile at room temperature, 0.02 g of stannous octoate, and 5.36 g of ethyl isocyanate acrylate are added. The reaction is stirred at room temperature for 72 hours. The product is then centrifuged and washed with acetone to obtain the final zwitterionic monomer.

[0035] The specific composition ratios of the photosensitive resin composition are shown in Table 1.

[0036] Example 3 Step S1: At room temperature, add 40 mL of ethyl orthosilicate and 5.2 mL of ethanol to a beaker. After stirring for half an hour, slowly add 9.65 mL of water, followed by the dropwise addition of 0.07 g of 1 mol / L nitric acid, maintaining the pH of the reaction system at approximately 2-3. After the addition is complete, the system is heated to 50°C and allowed to react for 5 hours. The reaction is terminated when the particle size approaches 30 nm. The resulting silica sol is then added to a flask and heated at 120°C to maintain a boiling solution. Methanol vapor, generated by heating a separate flask to 80°C, is then continuously blown into the reactor containing the silica sol using nitrogen. The water content is measured by observing the liquid volume in the container in real time. The displacement is terminated when the water content is below 5%, yielding a methanol-dispersed silica sol.

[0037] Step S2: Mix 0.54 g of a silane coupling agent (KH570), 6 g of n-butanol, and 0.01 g of 1 mol / L hydrochloric acid and stir for 30 minutes. The mixture is then gradually added dropwise to the reaction system in Step S1. After the addition is complete, the temperature is raised to 60°C and the reaction is continued for 5 hours. The temperature is then rapidly cooled to room temperature, and the propylene glycol methyl ether solution is added dropwise. After the addition is complete, the n-butanol and methanol are removed from the system using a vacuum distillation apparatus, maintaining the system temperature at approximately 55°C, until the solids content reaches approximately 30%. A 1 μm filter is then used to remove large particles, and the product is collected to obtain an organically modified silica sol, which is stored in a cool, dark place.

[0038] Step S3: Dissolve 2 g of sodium hydroxide in 80 mL of formamide at room temperature. Once completely dissolved, add 7.56 g of 4-pyridinepropionic acid and 8.02 g of 5-bromo-1-pentanol. The mixture is then reacted at 60°C for 24 hours. After completion of the reaction, the product is centrifuged, washed with acetone, and dried under vacuum at room temperature for 48 hours to obtain an intermediate product. Next, the intermediate product is dissolved in 100 mL of acetonitrile at room temperature, 0.02 g of stannous octoate, and 5.36 g of ethyl isocyanate acrylate are added. The reaction is stirred at room temperature for 72 hours. The product is then centrifuged and washed with acetone to obtain the final zwitterionic monomer.

[0039] The specific composition ratios of the photosensitive resin composition are shown in Table 1.

[0040] Example 4 The specific composition ratios of the photosensitive resin composition are shown in Table 1, wherein the organosilica sol is prepared by the method described in Example 1.

[0041] Example 5 The specific composition ratios of the photosensitive resin composition are shown in Table 1, wherein the organosilica sol is prepared by the method described in Example 1.

[0042] Comparative Example 1 The specific composition ratios of the photosensitive resin composition are shown in Table 1, wherein the organosilica sol is prepared by the method described in Example 1.

[0043] Comparative Example 2 The specific composition ratios of the photosensitive resin composition are shown in Table 1.

[0044] Table 1: Weighing amount of specific examples and comparative examples Preparation of organic-inorganic hydrophilic anti-fog and anti-fouling coating: Based on the formula in Table 1, the components were weighed in proportion according to weight, magnetically stirred in a beaker for 2 hours, and then flow-coated on an acrylic plate. The coating was allowed to evaporate and level vertically at room temperature and 50% humidity for 10 minutes, then heated at 80°C for 2 minutes, and irradiated under UV light for 2 hours to obtain a coated acrylic plate.

[0045] Performance testing: Silica solid content test: The prepared silica sol was dried in an oven at 130°C and then tested. The weight change before and after was calculated: solid content = W / W0*100%, W: weight after drying, g; W0: initial weight, g.

[0046] Hydrophilicity test: Use a water contact angle meter to measure the static contact angle when 2 μL of pure water is added.

[0047] Antifouling performance testing: The prepared coating was soaked in 10% PBS buffer for 10 minutes and then placed in a 12-well plate. 3 mL of E. coli solution was added to each well, maintaining an optical density (OD) of 0.05. The plate was then incubated on a shaker at 37°C for 12 hours. The plate was then stained with a stain for 15 minutes under backlight, washed with 10% PBS buffer, and observed for E. coli adhesion using an inverted fluorescence microscope. Coating surfaces where bacterial adhesion was less than 10% of the total surface area were marked as ○; otherwise, ※.

[0048] Surface anti-fouling performance test: Oily liquids such as cooking oil or organic solvents such as xylene and n-hexane were dropped onto the inclined coating surface (at a 10° angle) and the droplets were observed to slide off. A score of ○ was given if the droplet completely slid off the surface; a score of ※ was given if some droplet remained.

[0049] Anti-fog performance test: After curing, the substrate with coating is tested according to GB / T31726-2015 Test method for anti-fog performance of plastic films. The coating surface with anti-fog grade of 2 or above is marked as ○, and the rest are marked as ※.

[0050] Friction resistance testing: Referring to GB T 30314-2019, the coating's wear resistance was evaluated using a rotary table grinder (LC-802B Taber, China) with two CS-10 abrasive wheels under a load of 250 g. The sample had a diameter of 105 mm, a center hole diameter of 6 mm, and a test speed of 72 rpm. To evaluate the coating's wear resistance, the static water contact angle, antifouling properties, and anti-fog properties were measured after 100 abrasion cycles. Results indicating essentially unchanged performance or a change of less than 10% were marked with an "○"; other results were marked with a "※."

[0051] Table 2: Performance of each preparation example It can be seen from Examples 1-3 in Table 2 that different addition amounts of organically modified silica sols and zwitterions can all enable the coating surface to achieve excellent hydrophilic anti-fog and anti-fouling properties.

[0052] As can be seen from Example 1 and Comparative Example 1, and from Example 1 and Comparative Example 2, the absence of zwitterions or organically modified silica sols significantly reduces the antifouling and friction resistance of the coating. Therefore, the presence of zwitterions can improve the hydrophilicity of the coating surface and its antifog, antifouling, and anti-pollution properties, while the presence of organically modified silica sols can effectively improve the stability and friction resistance of the coating.

[0053] The above embodiments describe in detail the structure, features and effects of the present invention. The above are only preferred embodiments of the present invention. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the scope covered by the specification, should be within the scope of protection of the present invention.

Claims

1. A photosensitive resin composition, characterized in that The invention comprises 20-50 parts by weight of organically modified silica sol, 5-20 parts by weight of zwitterionic monomer, 5-30 parts by weight of acrylic acid or methacrylic acid, 10-50 parts by weight of acrylate or methacrylate monomer, 1-5 parts by weight of photoinitiator, 1-5 parts by weight of leveling agent and 5-10 parts by weight of water; The preparation method of the organic modified silica sol is to prepare the silica sol by using an acid catalysis method, then replace it with methanol, and finally modify it with a silane coupling agent to obtain the organic modified silica sol; The silane coupling agent is one or more of 3-aminopropyltriethoxysilane, 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 3-(methacryloyloxy)propyltrimethoxysilane, methyltriethoxysilane or vinyltrimethoxysilane; The preparation method of the zwitterionic monomer comprises the following steps: firstly reacting sodium hydroxide, 4-pyridine propionic acid and 5-bromo-1-pentanol in an organic solvent and treating the reacted product to obtain an intermediate product; then reacting the intermediate product with a catalyst and ethyl isocyanate acrylate in acetonitrile and treating the reacted product to obtain the zwitterionic monomer.

2. The photosensitive resin composition according to claim 1, wherein The preparation method of the organic modified silica sol is: (1) At room temperature, ethyl orthosilicate and ethanol are stirred for half an hour, water is added, and then an acidic catalyst is added dropwise, and the pH of the reaction system is controlled at 2-3. After the addition is completed, the system is heated to 50 °C and reacted for 5 hours. When the particle size is close to 30 nm, the reaction is stopped to obtain silica sol; the acidic catalyst is one of hydrochloric acid, nitric acid or acetic acid, the concentration is 1 mol / L, and the addition amount is 1 wt% of water; the molar ratio of ethyl orthosilicate to ethanol is 2:1; the molar ratio of water to ethyl orthosilicate is 1:1 to 3:1; (2) Bringing the silica sol to a boil at 100-120 °C, introducing methanol vapor with nitrogen or carbon dioxide, and stopping the displacement after the water content is monitored to be less than 5%, thereby obtaining a methanol-dispersed silica sol; (3) After mixing and stirring the silane coupling agent, n-butanol and hydrochloric acid, the mixture was added dropwise to the silica sol dispersed in methanol; the temperature was then raised to 60 °C for reaction for 5 h, and the temperature was lowered to room temperature before propylene glycol methyl ether solution was added dropwise; the n-butanol and methanol were then removed by vacuum distillation at 55 °C until the solid content reached 30%, and the product was collected after filtration through a 1 μm filter membrane to obtain an organically modified silica sol; the amount of silane coupling agent added was 1 wt% to 10 wt% of the amount of silica in the solvent; the amount of hydrochloric acid added was 0.5 wt% of the amount of silica in the solvent; and the amount of n-butanol added was 10 to 50 wt% of the amount of silica in the solvent.

3. The photosensitive resin composition according to claim 1, wherein The preparation method of the zwitterionic monomer is as follows: (1) 2 g of sodium hydroxide was dissolved in 80 mL of an organic solvent at room temperature. After complete dissolution, 7.56 g of 4-pyridine propionic acid and 8.02 g of 5-bromo-1-pentanol were added, and the mixed solution was reacted at 55-75 °C for 24 h. After the reaction was completed, the product was washed by centrifugation and acetone, and then vacuum-dried at room temperature for 48 h to obtain an intermediate product. The organic solvent was formamide, butanone, tetrahydrofuran or toluene. (2) The intermediate product was dissolved in 100 mL of acetonitrile at room temperature, 0.02 g of catalyst was added, and 5.36 g of ethyl isocyanate acrylate was added. The reaction was stirred at room temperature for 72 h, and the product was then centrifuged and washed with acetone to obtain a zwitterionic monomer. The catalyst was one of triethylamine, stannous octoate, and dibutyltin dilaurate.

4. The photosensitive resin composition according to claim 1, wherein The acrylate monomers are one or more of polyurethane acrylate, amino acrylate, and ethoxylated pentaerythritol tetraacrylate; the methacrylate monomers are one or more of ethoxylated pentaerythritol tetramethacrylate, polyurethane methacrylate, and amino methacrylate.

5. The photosensitive resin composition according to claim 1, wherein The photoinitiator is one or more of 2-hydroxy-2-methyl-1-phenylpropanone, 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone, and 1-hydroxy-cyclohexyl-phenyl ketone.

6. The photosensitive resin composition according to claim 1, wherein The leveling agent is one of a polyacrylate leveling agent and a silicone leveling agent.

7. A method for preparing the photosensitive resin composition according to claim 1, characterized in that: Mix 20-50 parts by weight of organically modified silica sol, 5-20 parts by weight of zwitterionic monomer, 5-30 parts by weight of acrylic acid or methacrylic acid, 10-50 parts by weight of acrylate or methacrylate monomer, 1-5 parts by weight of photoinitiator, 1-5 parts by weight of leveling agent and 5-10 parts by weight of water and stir for 2 h.

8. An organic-inorganic hydrophilic anti-fog and anti-fouling coating prepared from the photosensitive resin composition according to claim 1, characterized in that: The photosensitive resin composition is uniformly applied on glass, wood or organic board by coating, and an organic-inorganic hydrophilic anti-fog and anti-fouling coating is obtained after solvent volatilization, heating and UV-induced curing; the heating temperature is 60-80°C, the heating time is 1-3 minutes, and the wavelength of the UV is 365 nm.

9. Use of the organic-inorganic hydrophilic anti-fog and anti-fouling coating according to claim 8.

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