Transparent antibacterial hydrophobic coating, transparent antibacterial hydrophobic lens with transparent antibacterial hydrophobic coating and preparation method of transparent antibacterial hydrophobic lens
A transparent antibacterial and hydrophobic coating was prepared by microwave reaction of GO@SiO2/ZnO heterojunction nanostructure powder, which solved the problems of poor interfacial adhesion and easy coating peeling. It achieved the integration of high light transmittance, superhydrophobicity and efficient antibacterial function, and is applicable to multiple fields.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DANYANG SASAKAWA GLASSES CO LTD
- Filing Date
- 2026-02-26
- Publication Date
- 2026-05-12
AI Technical Summary
Existing transparent lenses suffer from problems during use, such as poor interfacial adhesion, easy coating peeling, insufficient wear resistance, insufficient hydrophobic modification of nano-SiO2, poor light transmittance, and decreased safety and light transmittance of antibacterial components. Furthermore, the coating modification process is complex and costly.
A transparent antibacterial and hydrophobic coating was prepared by microwave reaction using GO@SiO2/ZnO heterojunction nanostructure powder. After being combined with an epoxy resin substrate, the GO@SiO2/ZnO heterojunction nanostructure powder was sprayed on after semi-curing to achieve strong interfacial bonding and uniform coverage of the functional layer. The covalent bonds and hydrogen bonds of the GO/SiO2/ZnO heterojunction formed a stable structure, which improved the antibacterial and hydrophobic properties.
It achieves high light transmittance, stable adhesion, superhydrophobicity, and high antibacterial properties in transparent lenses, avoids functional incompatibilities, reduces production costs and equipment investment, and is applicable to multiple fields.
Smart Images
Figure CN122011820A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of coating technology, and in particular to a transparent antibacterial hydrophobic coating, a transparent antibacterial hydrophobic lens having the same coating, and a method for preparing the coating. Background Technology
[0002] As a core component, optical lenses have evolved from simply providing light transmission to offering a multi-functional solution that integrates light transmission, stain resistance, and antibacterial properties. During actual use, lenses are easily contaminated by water, oil, and dust, affecting their light transmission. Furthermore, their surfaces are prone to harboring pathogens such as Staphylococcus aureus and Escherichia coli. This can lead to cross-infection, particularly in the fields of medical devices and protective equipment, and can endanger human health. In consumer electronics and everyday consumer goods, bacterial growth can also reduce lens lifespan and negatively impact the user experience.
[0003] Currently, existing technologies mostly prepare antibacterial hydrophobic lenses through coating modification, but there are still many technical defects: First, the interfacial bonding between the epoxy material and the functional coating is poor, the coating is easy to fall off, has insufficient wear resistance, and its function decays rapidly after long-term use; Second, due to its high surface energy, nano-SiO2 is prone to agglomeration into large particles, which prevents the hydrophobic modifier from being evenly covered, resulting in insufficient hydrophobic modification of SiO2 and poor light transmittance of the lens; Third, the safety and efficiency of antibacterial components are questionable. For example, the addition of antibacterial component Ag poses a potential risk of heavy metal toxicity, and excessive antibacterial components lead to a decrease in light transmittance; Fourth, coating modification often uses methods such as vacuum sputtering, which are complex processes and have high equipment costs.
[0004] To address the aforementioned issues, developing a transparent, antibacterial, and hydrophobic lens that achieves strong interfacial bonding through substrate system optimization, high-performance functional powders through modified process parameters, and functional synergy through chemical bond energy regulation has become a pressing technical challenge for the industry. Summary of the Invention
[0005] The purpose of this invention is to address the aforementioned shortcomings of the prior art by providing a transparent antibacterial hydrophobic coating, a transparent antibacterial hydrophobic lens having the same coating, and a method for preparing the coating.
[0006] The first objective of this invention is to provide a transparent antibacterial and hydrophobic coating comprising GO@SiO2 / ZnO heterojunction nanostructure powder. The preparation method of the GO@SiO2 / ZnO heterojunction nanostructure powder is as follows: silane-modified silica particles, hexamethylenetetramine, zinc nitrate, and graphene oxide are dispersed in an ethanol solution to form a reaction solution. After the reaction solution is microwaved, it is filtered, washed, dried, and ground to obtain the GO@SiO2 / ZnO heterojunction nanostructure powder.
[0007] Furthermore, the molar ratio of hexamethylenetetramine to zinc nitrate is 1:1.
[0008] Furthermore, the mass ratio of silane-modified silica particles, zinc nitrate, and graphene oxide is (10-100):(1-10):1.
[0009] Furthermore, in the reaction solution, the concentration of graphene oxide is 0.01-5 g / L, the length of graphene oxide is 20-200 nm, and the thickness is 1-5 nm.
[0010] A second object of the present invention is to provide a transparent antibacterial hydrophobic lens, comprising a lens and a transparent antibacterial hydrophobic coating as described above coated thereon.
[0011] Furthermore, the lens is made of epoxy resin.
[0012] A third objective of this invention is to provide a method for preparing the transparent antibacterial hydrophobic lens as described above, comprising the following steps: S1. Semi-curing and shaping of epoxy materials: Epoxy resin and polyetheramine are mixed in a 1:1 molar ratio of epoxy equivalent to amine hydrogen equivalent. The mixture is stirred at a constant temperature in a sealed container. Organic phosphate ester additives are added to the above mixture and mixed thoroughly. After vacuum degassing, the above mixture is poured into a horizontally placed petri dish or mold for semi-curing and shaping. S2. The above-mentioned GO@SiO2 / ZnO heterojunction nanostructure powder is dispersed in ethanol and ultrasonically dispersed to obtain a transparent spraying slurry. The slurry is uniformly sprayed onto the surface of the semi-cured epoxy layer in step S1. The sprayed substrate is dried and cured to form a transparent antibacterial and hydrophobic coating, and finally a transparent antibacterial and hydrophobic lens is obtained.
[0013] Furthermore, in step S1, the thickness of the liquid poured into the horizontally placed petri dish or mold is controlled at 1-2 mm; it is semi-cured and shaped at 40-60℃ for 30-45 minutes.
[0014] Furthermore, the total thickness of the transparent antibacterial and hydrophobic coating is 5-8 μm. The concentration of GO@SiO2 / ZnO heterostructure nanostructure powder in the slurry is 1-10 g / L. In step S2, the ultrasonic dispersion time is 100-500 W for 10-40 min; the nozzle diameter of the W-71 spray gun is 0.8 mm, the spraying pressure is 0.3-0.5 MPa, the spraying distance is 15-20 cm, and a multi-pass thin-spray method is used. These spraying parameters ensure that the functional layer uniformly covers the substrate surface with controllable thickness, while avoiding defects such as pinholes and sagging during the spraying process, thus guaranteeing the transparency and integrity of the functional layer.
[0015] Furthermore, the organophosphate ester additive is one of triethyl phosphate, tributyl phosphate, dimethyl methylphosphonate, and diphenylisooctyl phosphate, and the mass ratio of epoxy resin to organophosphate ester additive is 2-5:1; the sealed constant temperature stirring temperature is 55-65℃, and the stirring time is 60-90 min; the vacuum degree of vacuum degassing is -0.08~-0.1 MPa, and the degassing time is 20-30 min.
[0016] In this invention, under microwave conditions, the GO functional group interacts with Zn²⁺ via electrostatic attraction. + Coordination adsorption is formed, allowing Zn²⁺ to undergo coordinative adsorption. + Uniformly anchored on the surface and edges of GO sheets; as the microwave reaction proceeds, hexamethylenetetramine induces the stacking of ZnO polar crystal planes (002), promoting the exposure of hydrophobic nonpolar crystal planes; hydrophobic ZnO crystal nuclei grow in situ on the surface of GO sheets and SiO2 nanoparticles, or SiO2 nanoparticles are loaded on the ZnO crystal nuclei and GO sheet surfaces through Si-O bonds, ultimately forming a GO / SiO2 / ZnO heterojunction powder of "GO two-dimensional substrate + SiO2 nanoparticle dispersion loading + ZnO nanocrystal in situ growth". GO serves as a two-dimensional substrate, providing attachment sites and regulating dispersion. SiO2, through superhydrophobic modification, imparts antifouling properties to the functional layer. ZnO forms antibacterial active sites through in-situ growth. GO / SiO2 / ZnO form a stable heterojunction through strong interactions such as covalent bonds and hydrogen bonds, ultimately achieving a synergistic effect of "transparency-antibacterial-hydrophobicity". Moreover, due to its composite nature, both antibacterial and hydrophobic properties are enhanced compared to single components, resulting in a 1+1 greater than 2 effect.
[0017] The lens preparation method of the present invention, by adding organophosphate ester additives, can improve the compatibility between epoxy resin and polyetheramine, improve the formability and mechanical properties of the substrate, enhance the bonding force between the substrate and the subsequent composite functional layer, and also enhance the light transmittance of the epoxy resin substrate.
[0018] Compared with the prior art, the present invention has the following advantages: 1) GO@SiO2 / ZnO heterojunction nanostructure powder is prepared by microwave-assisted reaction. Compared with traditional water bath heating, the reaction efficiency is higher, the product particle size is more uniform, and the reaction time is shortened to 10-40 min, which greatly improves the production efficiency. Ethanol and distilled water are used as solvents throughout the process, which is environmentally friendly and leaves no toxic residues. The process parameters are controllable and have good repeatability, making it easy to scale up mass production.
[0019] 2) The preparation process of this invention does not require high temperature and high pressure, the core reaction temperature is ≤65℃, the spray curing temperature is only 60℃, and the energy consumption is significantly reduced; the required instrument and equipment investment is small, the process steps are simple and controllable, the operation is convenient, and it is suitable for mass production. 3) This invention adopts a composite structure design of "semi-cured substrate + GO@SiO2 / ZnO superhydrophobic antibacterial functional layer spraying". The epoxy resin substrate is firmly bonded to the substrate, and the functional layer forms stable chemical bonds with the substrate, which solves the problems of poor adhesion and easy peeling of existing coatings. At the same time, the GO / SiO2 / ZnO heterojunction achieves synergy between hydrophobic and antibacterial properties, avoids functional mutual exclusion, and takes into account high light transmittance.
[0020] 4) In this invention, graphene oxide and silicon dioxide nanoparticles and nano zinc oxide are chemically bonded. By precisely controlling the process and the composite ratio, a GO@SiO2 / ZnO heterojunction composite structure is constructed, which realizes the uniform dispersion of nanoparticles and forms a superhydrophobic and antibacterial transparent lens. 5) This invention achieves a functionally integrated transparent lens with "superhydrophobicity and antifouling + high-efficiency antibacterial" by constructing a GO@SiO2 / ZnO heterostructure: light transmittance (380-780nm) ≥ 88%, coating surface contact angle ≥ 150°, which can effectively prevent water droplets and stains from adhering; UPF50+ high-level ultraviolet protection, antibacterial rate of Staphylococcus aureus ≥ 99%, antibacterial rate of Escherichia coli ≥ 99%, antibacterial effect is long-lasting and stable, and there is no risk of biotoxicity from silver components, making it suitable for medical, daily necessities and other scenarios.
[0021] 6) The raw materials used in this invention are all conventional chemical raw materials, which are inexpensive and widely available. The preparation process does not emit any toxic or harmful substances and is environmentally friendly. 7) It can be adapted to multiple fields such as consumer electronics (mobile phone lenses, smart wearable lenses), medical devices (endoscopic lenses, surgical instrument optical windows), precision optical equipment (microscope lenses), medical protective equipment (goggles), and daily functional products (eyeglass lenses), with broad market application prospects.
[0022] Therefore, the process of this invention is simple and controllable, environmentally friendly and moderately cost-effective, and suitable for mass production. The transparent antibacterial hydrophobic lens prepared by this method has excellent transparency, stable surface adhesion, superhydrophobic properties and high-efficiency antibacterial properties, and has broad application prospects in the field of surface modification where light transmittance is clearly required, such as lenses, optical devices, medical protective equipment and daily functional products. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of the GO@SiO2 / ZnO heterojunction nanopowder prepared in Example 1; Figure 2 This is a schematic diagram of the structure of the GO@SiO2 / ZnO heterojunction nanopowder prepared in Example 2. Detailed Implementation
[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0025] The silane-modified silica particles in the examples and comparative examples were prepared using the following method: Silica nanoparticles with a particle size of 15-50 nm were dispersed in ethanol to form a dispersion. Distilled water was added, and dodecyltrimethylsilane (DTMS) was added dropwise as a superhydrophobic surface modifier. The silica concentration was 50-100 g / L, and the mass ratio of silica, water, and DTMS was 1:0.5:0.05. The reaction mixture was stirred at 30-40 °C for 5 h. The resulting mixture was centrifuged at 8000 rpm for 15 min, washed with ethanol, and dried at 60 °C for 5 h. The product was named SiO2-DTMS.
[0026] Example 1 A method for preparing a transparent antibacterial hydrophobic lens includes the following steps: 1) Semi-curing and setting of epoxy-based material: According to the epoxy-amine hydrogen equivalent ratio of epoxy resin E51 and polyetheramine D400 of 1:1, take 100g of epoxy resin E51 and add the corresponding amount of polyetheramine D400 into a closed reaction vessel, stir at 55℃ for 60min to mix evenly; add 20g of triethyl phosphate (mass ratio 5:1), mix thoroughly, and place in a vacuum drying oven for degassing at -0.08MPa vacuum for 20min; pour the mixed solution into a horizontally placed petri dish, control the liquid surface thickness to 1mm, and semi-cur and set at 60℃ for 30min to obtain a semi-cured epoxy-based material layer.
[0027] 2) Preparation of GO@SiO2 / ZnO heterojunction nanopowder: 50 g / L of silane-modified silica particles (15 nm in diameter), 7 g / L of hexamethylenetetramine, 9.5 g / L of zinc nitrate, and 1 g / L of graphene oxide were dispersed in an ethanol solution to form a reaction solution. This solution was placed in a microwave reactor and microwaved at 50 W for 40 min. After the reaction, the mixture was centrifuged at 8000 rpm for 15 min and washed three times with anhydrous ethanol. The powder was then dried at 80 °C for 4 h to obtain GO@SiO2 / ZnO heterojunction nanostructure powder. The structural diagrams of SiO2 and ZnO are shown below. Figure 1 As shown in the figure, when the silicon oxide is 15 nm in size, the surface of the zinc oxide short rod is partially modified with silicon oxide.
[0028] 3) Preparation and curing of composite coating: GO@SiO2 / ZnO heterojunction nanoparticles were dispersed in ethanol to form a dispersion with a total powder concentration of 5 g / L; ultrasonic dispersion was performed at 100 W for 40 min to obtain a transparent spray slurry; a W-71 spray gun (nozzle diameter 0.8 mm, spraying pressure 0.3 MPa, spraying distance 15 cm) was used to spray the semi-cured epoxy layer surface in multiple thin sprays; the sprayed substrate was placed in an oven and dried and cured at 60℃ for 4 h to form a composite coating with a total thickness of 5 μm, thus obtaining a transparent antibacterial hydrophobic lens.
[0029] The lens prepared in this embodiment was subjected to performance tests: the light transmittance (380-780nm) was 89.2%, the static contact angle was 152°, the UPF 50+ level of ultraviolet protection was 99.3% against Staphylococcus aureus, and the antibacterial rate against Escherichia coli was 99.1%.
[0030] Example 2 A method for preparing a transparent antibacterial hydrophobic lens includes the following steps: 1) Semi-curing and setting of epoxy-based material: According to the epoxy-amine hydrogen equivalent ratio of epoxy resin E51 and polyetheramine D400 of 1:1, take 200g of epoxy resin E51 and add the corresponding amount of polyetheramine D400 into a closed reaction vessel, stir at 60℃ for 75min to mix evenly; add 50g of tributyl phosphate (mass ratio 4:1), mix thoroughly, and degas under a vacuum of -0.09MPa for 25min; pour the mixed solution into a mold, control the liquid surface thickness to be 1.5mm, and semi-cur and set at 40℃ for 40min to obtain a semi-cured epoxy-based material layer.
[0031] 2) Preparation of GO@SiO2 / ZnO heterojunction nanopowder: 80 g / L of silane-modified silica particles (50 nm in diameter), 14 g / L of hexamethylenetetramine, 19 g / L of zinc nitrate, and 2 g / L of graphene oxide were dispersed in an ethanol solution to form a reaction solution. This solution was placed in a microwave reactor and microwaved at 50 W for 40 min. After the reaction, the mixture was centrifuged at 8000 rpm for 15 min, washed three times with anhydrous ethanol, and dried at 80 °C for 4 h to obtain GO@SiO2 / ZnO heterojunction nanostructured powder. A schematic diagram of its structure is shown below. Figure 2 As shown, from Figure 2 As can be seen, when the size of silicon oxide is 50 nm, zinc oxide is partially modified on the surface of silicon oxide.
[0032] 3) Preparation and curing of composite coating: GO@SiO2 / ZnO heterojunction nanoparticles were dispersed in ethanol to form a dispersion with a total powder concentration of 10 g / L; ultrasonic dispersion was performed at 300 W for 25 min to obtain a transparent spray slurry; a W-71 spray gun (nozzle diameter 0.8 mm, spraying pressure 0.4 MPa, spraying distance 18 cm) was used to spray the semi-cured epoxy layer surface in multiple thin sprays; the sprayed substrate was placed in an oven and dried and cured at 60 °C for 4 h to form a composite coating with a total thickness of 6.5 μm, thus obtaining a transparent antibacterial hydrophobic lens.
[0033] Performance test results: Light transmittance is 90.5%, static contact angle is 156°, antibacterial rate against Staphylococcus aureus is 99.5%, UPF 50+ level ultraviolet protection, antibacterial rate against Escherichia coli is 99.4%, and coating adhesion and wear resistance are excellent.
[0034] Example 3 A method for preparing a transparent antibacterial hydrophobic lens includes the following steps: 1) Semi-curing and setting of epoxy-based material: According to the epoxy-amine hydrogen equivalent ratio of epoxy resin E51 and polyetheramine D400 of 1:1, take 150 g of epoxy resin E51 and add the corresponding amount of polyetheramine D400 into a closed reaction vessel, stir at 65℃ for 90 min to mix evenly; add 75 g of dimethyl methylphosphonate (mass ratio 2:1), mix thoroughly, and degas under a vacuum of -0.1MPa for 30 min; pour the mixed solution into a mold, control the liquid surface thickness to be 2 mm, and semi-cur and set at 50℃ for 45 min to obtain a semi-cured epoxy-based material layer.
[0035] 2) Preparation of GO@SiO2 / ZnO heterojunction nanopowder: 100 g / L of silane-modified silica particles (particle size 15-50 nm), 10 g / L of hexamethylenetetramine, 14 g / L of zinc nitrate, and 5 g / L of graphene oxide were dispersed in an ethanol solution to form a reaction solution. The solution was placed in a microwave reactor and microwaved at 50 W for 40 min. After the reaction, the mixture was centrifuged at 8000 r / min for 15 min, washed three times with anhydrous ethanol, and dried at 80 °C for 4 h to obtain GO@SiO2 / ZnO heterojunction nanostructured powder. 3) Preparation and curing of composite coating: GO@SiO2 / ZnO heterojunction nanoparticles were dispersed in ethanol to form a dispersion with a total powder concentration of 10 g / L; ultrasonic dispersion was performed at 500 W for 10 min to obtain a transparent spray slurry; a W-71 spray gun (nozzle diameter 0.8 mm, spraying pressure 0.5 MPa, spraying distance 20 cm) was used to spray the semi-cured epoxy layer surface in multiple thin sprays; the sprayed substrate was placed in an oven and dried and cured at 60℃ for 4 h to form a composite coating with a total thickness of 8 μm, thus obtaining a transparent antibacterial hydrophobic lens.
[0036] Performance test results: Light transmittance is 88.5%, static contact angle is 153°, antibacterial rate against Staphylococcus aureus is 99.2%, UPF 50+ level ultraviolet protection, antibacterial rate against Escherichia coli is 99.0%, coating performance is stable and meets the needs of multiple application scenarios.
[0037] Comparative Example 1 A method for preparing a transparent antibacterial hydrophobic lens In the preparation and curing of the composite coating, the GO@SiO2 / ZnO heterojunction nanoparticles were replaced with the same mass of GO@ZnO nanoparticles, and everything else was the same as in Example 2.
[0038] Preparation of GO@SiO2 nanopowder: Solution A: Disperse 80 g / L of silane-modified silica particles (50 nm in diameter) and 2 g / L of graphene oxide in a solvent to obtain a precursor reaction solution. Place the solution in a microwave reactor and microwave at 50 W for 40 min. After the reaction, centrifuge at 8000 r / min for 15 min, wash three times with anhydrous ethanol, and dry at 80 °C for 4 h to obtain GO@SiO2 heterojunction nanostructure powder. Performance test results: The light transmittance (380-780nm) is 89%, the static contact angle is 146°, there is no UPF protection, the antibacterial rate against Staphylococcus aureus is 50%, the antibacterial rate against Escherichia coli is 53%, and the hydrophobicity of its coating is lower than that of Example 2, and the antibacterial performance drops sharply.
[0039] Experimental results confirm that the GO@SiO2 / ZnO heterojunction described in this invention is the core structural basis for achieving the multifunctional properties of transparent, antibacterial, and hydrophobic materials.
[0040] Comparative Example 2 A method for preparing a transparent antibacterial hydrophobic lens In the preparation and curing of the composite coating, the GO@SiO2 / ZnO heterojunction nanoparticles were replaced with the same mass of GO@ZnO nanoparticles, and everything else was the same as in Example 2.
[0041] Preparation of GO@ZnO nanopowder: 14 g / L hexamethylenetetramine, 19 g / L zinc nitrate, and 2 g / L graphene oxide were dispersed in an ethanol solution to form a reaction solution, which was then placed in a microwave reactor and microwaved at 50 W for 40 min. After the reaction was completed, the mixture was centrifuged at 8000 r / min for 15 min, washed three times with anhydrous ethanol, and dried at 80 °C for 4 h to obtain GO@ZnO heterojunction nanostructure powder. Performance test results: transmittance (380-780nm) 88.3%, static contact angle 120°, antibacterial rate against Staphylococcus aureus 83.5%, UPF 50+ level UV protection, and antibacterial rate against Escherichia coli 89.4%. The hydrophobicity of the coating decreased sharply compared to Example 2, and the antibacterial performance also decreased significantly.
[0042] Experimental results confirm that the GO@SiO2 / ZnO heterojunction described in this invention is the core structural basis for achieving the multifunctional properties of transparent, antibacterial, and hydrophobic materials.
[0043] In this embodiment, although only SiO2 with a single particle size was tested, it can be seen from Examples 1 and 2 that the claimed effect can be achieved regardless of whether the particle size of SiO2 is larger or smaller than that of zinc oxide.
[0044] For any points not covered above, existing technologies shall apply.
[0045] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the direction of the invention or exceeding the scope defined by the appended claims. Those skilled in the art should understand that any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of the present invention should be included within the protection scope of the present invention.
Claims
1. A transparent antibacterial and hydrophobic coating, characterized in that, The GO@SiO2 / ZnO heterojunction nanostructure powder is prepared as follows: silane-modified silica particles, hexamethylenetetramine, zinc nitrate, and graphene oxide are dispersed in an ethanol solution to form a reaction solution. After the reaction solution is microwaved, it is filtered, washed, dried, and ground to obtain the GO@SiO2 / ZnO heterojunction nanostructure powder.
2. The transparent antibacterial hydrophobic coating as described in claim 1, characterized in that, The molar ratio of hexamethylenetetramine to zinc nitrate is 1:
1.
3. The transparent antibacterial hydrophobic coating as described in claim 1, characterized in that, The mass ratio of silane-modified silica particles, zinc nitrate, and graphene oxide is (10-100):(1-10):
1.
4. The transparent antibacterial hydrophobic coating as described in claim 1, characterized in that, In the reaction solution, the concentration of graphene oxide is 0.01-5 g / L, the length of graphene oxide is 20-200 nm, and the thickness is 1-5 nm.
5. A transparent antibacterial hydrophobic lens, characterized in that, Includes a lens and a transparent antibacterial hydrophobic coating as described in any one of claims 1-4 coated thereon.
6. The transparent antibacterial hydrophobic lens as described in claim 5, characterized in that, The lens is made of epoxy resin.
7. A method for preparing a transparent antibacterial hydrophobic lens as described in claim 5 or 6, characterized in that, Includes the following steps: S1. Semi-curing and shaping of epoxy materials: Epoxy resin and polyetheramine are mixed in a 1:1 molar ratio of epoxy equivalent to amine hydrogen equivalent. The mixture is stirred at a constant temperature in a sealed container. Organic phosphate ester additives are added to the above mixture and mixed thoroughly. After vacuum degassing, the above mixture is poured into a horizontally placed petri dish or mold for semi-curing and shaping. S2. Disperse the GO@SiO2 / ZnO heterostructure nanostructure powder according to any one of claims 1-4 in ethanol, and ultrasonically disperse it to obtain a transparent spraying slurry. Spray the slurry evenly onto the surface of the semi-cured epoxy layer in step S1. Dry and cure the sprayed substrate to form a transparent antibacterial and hydrophobic coating, and finally obtain a transparent antibacterial and hydrophobic lens.
8. The preparation method according to claim 7, characterized in that, In step S1, the liquid level in the horizontally placed petri dish or mold is controlled to be 1-2 mm; it is semi-cured and set at 40-60℃ for 30-45 minutes.
9. The preparation method according to claim 7, characterized in that, The total thickness of the transparent antibacterial and hydrophobic coating is 5-8 μm; the concentration of GO@SiO2 / ZnO heterojunction nanostructure powder in the slurry is 1-10 g / L.
10. The preparation method according to claim 7, characterized in that, The organophosphate ester additive is one of triethyl phosphate, tributyl phosphate, dimethyl methylphosphonate, and diphenylisooctyl phosphate. The mass ratio of epoxy resin to organophosphate ester additive is 2-5:
1. The sealed constant temperature stirring temperature is 55-65℃, and the stirring time is 60-90 min. The vacuum degree of vacuum degassing is -0.08~-0.1 MPa, and the degassing time is 20-30 min.