Marine corrosion-resistant chemically strengthened glass and method for manufacturing the same

Abstract

The present application relates to the field of glass, in particular to a kind of seawater corrosion resistant chemical strengthening glass for ship and preparation method thereof.The thin film is formed on the surface of glass by composite thin film dispersion liquid.The present application forms composite corrosion resistant thin film on the surface of chemical strengthening glass in situ, greatly improves the chemical stability of glass matrix in seawater, salt fog and other harsh service environments such as acid and alkali, can effectively block the invasion of corrosive medium, significantly prolongs the service life of ship window glass.The method has simple process steps and low equipment requirements, not only saves energy, but also reduces environmental pollution, and is beneficial to industrialized scale production.

Description

Technical Field

[0001] This invention relates to the field of glass, specifically to a chemically strengthened glass for marine applications that is resistant to seawater corrosion and its preparation method. Background Technology

[0002] Silicate glass (such as lithium aluminum silicon glass and borosilicate glass) has been widely used in aerospace, special vehicles, and deep-sea exploration equipment windows due to its excellent optical properties, mechanical toughness, or low thermal expansion rate. However, in actual service, especially in extreme environments such as the ocean, glass is highly susceptible to corrosion by environmental media, which seriously affects its service life and the safety of the exploration window.

[0003] Especially in marine environments, seawater, as a natural strong electrolyte solution, contains various salts and complex chemical components. This accelerates the migration and precipitation of alkali metal ions in glass, severely damaging the glass's silicon-oxygen network framework. This phenomenon is particularly severe in high-temperature, high-salt, and high-humidity environments.

[0004] To improve the corrosion resistance of glass, current research mainly focuses on adding corrosion inhibitors during glass forming or coating the glass surface. While common coatings possess some corrosion resistance, they are prone to discoloration under sunlight and ultraviolet radiation. Existing anti-corrosion technologies and coating structures are insufficient to prevent long-term intrusion of corrosive media, and corrosion phenomena such as alkali precipitation, haziness, chalking, and pitting still occur in extreme environments such as high temperature, high humidity, or marine environments.

[0005] In recent years, graphene and graphene oxide have shown great potential in the field of corrosion protection due to their excellent chemical stability, unique two-dimensional sheet structure, and ultra-large specific surface area. The hydrophilic oxygen-containing functional groups on the surface of graphene oxide enable it to have a certain degree of dispersibility in water-based coatings. The extremely complex three-dimensional structure formed by its aggregation and stacking in the depth direction of the coating can create "maze-like" pathways, thereby significantly extending the penetration path of corrosive media and delaying corrosion. However, current research on graphene corrosion-resistant coatings is mostly limited to the protection of metallic materials, with relatively little research on graphene corrosion-resistant films for glass surfaces. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention provides a chemically strengthened glass for marine applications that is resistant to seawater corrosion and a method for preparing the same.

[0007] This invention is achieved through the following technical solution: A type of chemically strengthened glass for marine applications that is resistant to seawater corrosion is composed of a composite film dispersion that forms a thin film on the glass surface.

[0008] Furthermore, the preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.02g~0.1g of chitosan-urea-graphene composite material to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

[0009] Further, the preparation method of the chitosan-urea-graphene composite material is as follows: 0.5g of chitosan and 80mL of water are added to 25g of 0.5wt% graphene aqueous dispersion, and the mixture is sonicated for 15min to obtain a graphene / chitosan dispersion; then 0.5g of urea and 0.5g of 40wt% NaOH aqueous solution are added, and the mixture is heated to 80°C with stirring, and then kept at this temperature for 2h; then the pH is adjusted to neutral with citric acid aqueous solution, the solution is centrifuged, and washed multiple times with ethanol and deionized water to remove unreacted chitosan; finally, the mixture is dried in a vacuum oven at 90°C for 12h to obtain chitosan-urea-graphene composite material powder.

[0010] Furthermore, the preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.02~0.1g of chitosan-modified graphene to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

[0011] Further, the preparation method of the chitosan-modified graphene is as follows: 4g of graphene oxide is dispersed in 1000ml of deionized water, and then 2mg of acetic acid is added. The mixture is kept at a constant temperature in an ice-water bath and sonicated for 20min. Subsequently, 10g of chitosan is added to the above solution, and the mixture is heated and magnetically stirred at 95°C for 36h under a nitrogen atmosphere. After the reaction is completed, the solution is centrifuged and washed multiple times with ethanol and deionized water to remove unreacted chitosan. Finally, the solution is dried in a vacuum oven at 90°C for 12h to obtain chitosan-modified graphene powder.

[0012] Furthermore, the temperature of the ice-water bath is <10°C.

[0013] Furthermore, the glass is lithium aluminum silicon glass.

[0014] This invention provides a method for preparing chemically strengthened glass resistant to seawater corrosion for ships, comprising the following steps: ultrasonicating the glass in ethanol, acetone, and deionized water for 15 minutes; spin-coating the composite film dispersion onto the glass surface at 25°C and a speed of 2500 r / min for 20 seconds using a spin coater; placing the glass in a tube atmosphere furnace and heating it to 100°C at a rate of 2°C / min under nitrogen protection and holding it at that temperature for 1 hour; then heating it to 600°C at a rate of 2°C / min and holding it at that temperature for 2 hours; and finally cooling it to 25°C with the furnace to obtain chemically strengthened glass resistant to seawater corrosion for ships.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: This invention significantly improves the chemical stability of the glass substrate in harsh service environments such as seawater, salt spray, and acids and alkalis by in-situ curing a composite corrosion-resistant film on the surface of chemically strengthened glass. This effectively prevents the intrusion of corrosive media and significantly extends the service life of ship window glass. The method involves simple processes and requires minimal equipment, saving energy, reducing environmental pollution, and facilitating large-scale industrial production. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. The illustrative embodiments and descriptions of this invention are for illustrative purposes only and are not intended to limit the invention. The embodiments described below are some, but not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0017] In the following description, numerous specific details are set forth to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, materials, or methods are not specifically described to avoid obscuring the invention. Unless otherwise specified, the materials, instruments, and reagents used in the following embodiments are commercially available. Unless otherwise specified, the techniques used in the embodiments are conventional methods well known to those skilled in the art.

[0018] The preparation method of chitosan-modified graphene in this invention is as follows: First, 4g of graphene oxide (GO) is dispersed in 1000ml of deionized water, then 2mg of acetic acid is added, and the mixture is kept at a constant temperature (<10°C) in an ice-water bath and sonicated for 20min; then, 10g of chitosan is added to the above solution, and the mixture is heated and magnetically stirred at 95°C for 36h under a nitrogen atmosphere; after the reaction is completed, the solution is centrifuged, washed multiple times with ethanol and deionized water to remove unreacted chitosan, and finally dried in a vacuum oven at 90°C for 12h to obtain chitosan-modified graphene powder.

[0019] Preparation of chitosan-urea-graphene composite material in this invention: 0.5g chitosan and 80mL water were added to 25g of 0.5wt% graphene aqueous dispersion, and the mixture was sonicated for 15min to obtain a graphene / chitosan dispersion; then 0.5g urea and 0.5g 40wt% NaOH aqueous solution were added, and the mixture was heated to 80°C with stirring, and then kept at this temperature for 2h; then the pH was adjusted to neutral with citric acid aqueous solution, the solution was centrifuged, and washed multiple times with ethanol and deionized water to remove unreacted chitosan; finally, the mixture was dried in a vacuum oven at 90°C for 12h to obtain chitosan-urea-graphene composite material powder.

[0020] Example 1 A type of chemically strengthened glass for marine applications that is resistant to seawater corrosion is composed of a composite film dispersion that forms a thin film on the glass surface.

[0021] The preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.02g of chitosan-urea-graphene composite material to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

[0022] The preparation method of chemically strengthened glass for marine applications resistant to seawater corrosion is as follows: Lithium aluminum silicon glass is ultrasonically treated in ethanol, acetone, and deionized water for 15 minutes. The composite film dispersion is then spin-coated onto the glass surface at 25°C and a speed of 2500 r / min for 20 seconds using a spin coater. The glass is then placed in a tube atmosphere furnace and heated to 100°C at a rate of 2°C / min under nitrogen protection and held at that temperature for 1 hour. The temperature is then increased to 600°C at a rate of 2°C / min and held for 2 hours. Finally, the temperature is lowered to 25°C with the furnace to obtain chemically strengthened glass for marine applications resistant to seawater corrosion.

[0023] Example 2 A type of chemically strengthened glass for marine applications that is resistant to seawater corrosion is composed of a composite film dispersion that forms a thin film on the glass surface.

[0024] The preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.04g of chitosan-urea-graphene composite material to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

[0025] The preparation method of chemically strengthened glass for marine applications resistant to seawater corrosion is as follows: Lithium aluminum silicon glass is ultrasonically treated in ethanol, acetone, and deionized water for 15 minutes. The composite film dispersion is then spin-coated onto the glass surface at 25°C and a speed of 2500 r / min for 20 seconds using a spin coater. The glass is then placed in a tube atmosphere furnace and heated to 100°C at a rate of 2°C / min under nitrogen protection and held at that temperature for 1 hour. The temperature is then increased to 600°C at a rate of 2°C / min and held for 2 hours. Finally, the temperature is lowered to 25°C with the furnace to obtain chemically strengthened glass for marine applications resistant to seawater corrosion.

[0026] Example 3 A type of chemically strengthened glass for marine applications that is resistant to seawater corrosion is composed of a composite film dispersion that forms a thin film on the glass surface.

[0027] The preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.06g of chitosan-urea-graphene composite material to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

[0028] The preparation method of chemically strengthened glass for marine applications resistant to seawater corrosion is as follows: Lithium aluminum silicon glass is ultrasonically treated in ethanol, acetone, and deionized water for 15 minutes. The composite film dispersion is then spin-coated onto the glass surface at 25°C and a speed of 2500 r / min for 20 seconds using a spin coater. The glass is then placed in a tube atmosphere furnace and heated to 100°C at a rate of 2°C / min under nitrogen protection and held at that temperature for 1 hour. The temperature is then increased to 600°C at a rate of 2°C / min and held for 2 hours. Finally, the temperature is lowered to 25°C with the furnace to obtain chemically strengthened glass for marine applications resistant to seawater corrosion.

[0029] Example 4 A type of chemically strengthened glass for marine applications that is resistant to seawater corrosion is composed of a composite film dispersion that forms a thin film on the glass surface.

[0030] The preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.08g of chitosan-urea-graphene composite material to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

[0031] The preparation method of chemically strengthened glass for marine applications resistant to seawater corrosion is as follows: Lithium aluminum silicon glass is ultrasonically treated in ethanol, acetone, and deionized water for 15 minutes. The composite film dispersion is then spin-coated onto the glass surface at 25°C and a speed of 2500 r / min for 20 seconds using a spin coater. The glass is then placed in a tube atmosphere furnace and heated to 100°C at a rate of 2°C / min under nitrogen protection and held at that temperature for 1 hour. The temperature is then increased to 600°C at a rate of 2°C / min and held for 2 hours. Finally, the temperature is lowered to 25°C with the furnace to obtain chemically strengthened glass for marine applications resistant to seawater corrosion.

[0032] Example 5 A type of chemically strengthened glass for marine applications that is resistant to seawater corrosion is composed of a composite film dispersion that forms a thin film on the glass surface.

[0033] The preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.10g of chitosan-urea-graphene composite material to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

[0034] The preparation method of chemically strengthened glass for marine applications resistant to seawater corrosion is as follows: Lithium aluminum silicon glass is ultrasonically treated in ethanol, acetone, and deionized water for 15 minutes. The composite film dispersion is then spin-coated onto the glass surface at 25°C and a speed of 2500 r / min for 20 seconds using a spin coater. The glass is then placed in a tube atmosphere furnace and heated to 100°C at a rate of 2°C / min under nitrogen protection and held at that temperature for 1 hour. The temperature is then increased to 600°C at a rate of 2°C / min and held for 2 hours. Finally, the temperature is lowered to 25°C with the furnace to obtain chemically strengthened glass for marine applications resistant to seawater corrosion.

[0035] Example 6 A type of chemically strengthened glass for marine applications that is resistant to seawater corrosion is composed of a composite film dispersion that forms a thin film on the glass surface.

[0036] The preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.02g of chitosan-modified graphene to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

[0037] The preparation method of chemically strengthened glass for marine applications resistant to seawater corrosion is as follows: Lithium aluminum silicon glass is ultrasonically treated in ethanol, acetone, and deionized water for 15 minutes. The composite film dispersion is then spin-coated onto the glass surface at 25°C and a speed of 2500 r / min for 20 seconds using a spin coater. The glass is then placed in a tube atmosphere furnace and heated to 100°C at a rate of 2°C / min under nitrogen protection and held at that temperature for 1 hour. The temperature is then increased to 600°C at a rate of 2°C / min and held for 2 hours. Finally, the temperature is lowered to 25°C with the furnace to obtain chemically strengthened glass for marine applications resistant to seawater corrosion.

[0038] Example 7 A type of chemically strengthened glass for marine applications that is resistant to seawater corrosion is composed of a composite film dispersion that forms a thin film on the glass surface.

[0039] The preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.04g of chitosan-modified graphene to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

[0040] The preparation method of chemically strengthened glass for marine applications resistant to seawater corrosion is as follows: Lithium aluminum silicon glass is ultrasonically treated in ethanol, acetone, and deionized water for 15 minutes. The composite film dispersion is then spin-coated onto the glass surface at 25°C and a speed of 2500 r / min for 20 seconds using a spin coater. The glass is then placed in a tube atmosphere furnace and heated to 100°C at a rate of 2°C / min under nitrogen protection and held at that temperature for 1 hour. The temperature is then increased to 600°C at a rate of 2°C / min and held for 2 hours. Finally, the temperature is lowered to 25°C with the furnace to obtain chemically strengthened glass for marine applications resistant to seawater corrosion.

[0041] Example 8 A type of chemically strengthened glass for marine applications that is resistant to seawater corrosion is composed of a composite film dispersion that forms a thin film on the glass surface.

[0042] The preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.06g of chitosan-modified graphene to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

[0043] The preparation method of chemically strengthened glass for marine applications resistant to seawater corrosion is as follows: Lithium aluminum silicon glass is ultrasonically treated in ethanol, acetone, and deionized water for 15 minutes. The composite film dispersion is then spin-coated onto the glass surface at 25°C and a speed of 2500 r / min for 20 seconds using a spin coater. The glass is then placed in a tube atmosphere furnace and heated to 100°C at a rate of 2°C / min under nitrogen protection and held at that temperature for 1 hour. The temperature is then increased to 600°C at a rate of 2°C / min and held for 2 hours. Finally, the temperature is lowered to 25°C with the furnace to obtain chemically strengthened glass for marine applications resistant to seawater corrosion.

[0044] Example 9 A type of chemically strengthened glass for marine applications that is resistant to seawater corrosion is composed of a composite film dispersion that forms a thin film on the glass surface.

[0045] The preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.08g of chitosan-modified graphene to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

[0046] The preparation method of chemically strengthened glass for marine applications resistant to seawater corrosion is as follows: Lithium aluminum silicon glass is ultrasonically treated in ethanol, acetone, and deionized water for 15 minutes. The composite film dispersion is then spin-coated onto the glass surface at 25°C and a speed of 2500 r / min for 20 seconds using a spin coater. The glass is then placed in a tube atmosphere furnace and heated to 100°C at a rate of 2°C / min under nitrogen protection and held at that temperature for 1 hour. The temperature is then increased to 600°C at a rate of 2°C / min and held for 2 hours. Finally, the temperature is lowered to 25°C with the furnace to obtain chemically strengthened glass for marine applications resistant to seawater corrosion.

[0047] Example 10 A type of chemically strengthened glass for marine applications that is resistant to seawater corrosion is composed of a composite film dispersion that forms a thin film on the glass surface.

[0048] The preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.10g of chitosan-modified graphene to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

[0049] The preparation method of chemically strengthened glass for marine applications resistant to seawater corrosion is as follows: Lithium aluminum silicon glass is ultrasonically treated in ethanol, acetone, and deionized water for 15 minutes. The composite film dispersion is then spin-coated onto the glass surface at 25°C and a speed of 2500 r / min for 20 seconds using a spin coater. The glass is then placed in a tube atmosphere furnace and heated to 100°C at a rate of 2°C / min under nitrogen protection and held at that temperature for 1 hour. The temperature is then increased to 600°C at a rate of 2°C / min and held for 2 hours. Finally, the temperature is lowered to 25°C with the furnace to obtain chemically strengthened glass for marine applications resistant to seawater corrosion.

[0050] Comparative Example 1 Lithium aluminum silicon glass without composite film.

[0051] Test case The transmittance of the glass from each embodiment and comparative example was measured before acid etching and after immersion in 2M HCl containing 3.5 wt% NaCl for different times. The test results are shown in Table 1.

[0052] Table 1.

[0053]

[0054] The data comparison in Table 1 shows that, in the 720-hour immersion test in 2M HCl solution, the transmittance of the glass in Comparative Example 1 without the composite film significantly decreased over time, declining continuously from an initial 92.00%, reaching 90.83% after 240 hours and 85.43% after 480 hours, ultimately dropping to the lowest value in the table at 81.36%. In contrast, Examples 1 to 10 with the composite film exhibited extremely strong stability during the same acid immersion process. Although the initial transmittance was slightly lower than that of Comparative Example 1 due to the addition of graphene in the film, it remained at a high level of 86.35% to 86.60% and 84.58% to 85.62% respectively after 720 hours of immersion. A horizontal comparison of the two different modified films reveals that Examples 1 to 5 with added urea showed better corrosion resistance in the later stages of the test than Examples 6 to 10 without urea.

[0055] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A chemically strengthened glass for marine applications resistant to seawater corrosion, characterized in that, The reinforced glass is composed of a composite film dispersion that forms a film on the glass surface.

2. The tempered glass as described in claim 1, characterized in that, The preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.02g~0.1g of chitosan-urea-graphene composite material to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

3. The tempered glass as described in claim 2, characterized in that, The preparation method of the chitosan-urea-graphene composite material is as follows: 0.5g of chitosan and 80mL of water are added to 25g of 0.5wt% graphene aqueous dispersion, and the mixture is sonicated for 15min to obtain a graphene / chitosan dispersion; then 0.5g of urea and 0.5g of 40wt% NaOH aqueous solution are added, and the mixture is heated to 80°C with stirring, and then kept at this temperature for 2h; then the pH is adjusted to neutral with citric acid aqueous solution, the solution is centrifuged, and washed multiple times with ethanol and deionized water to remove unreacted chitosan; finally, the mixture is dried in a vacuum oven at 90°C for 12h to obtain chitosan-urea-graphene composite material powder.

4. The tempered glass as described in claim 1, characterized in that, The preparation method of the composite film dispersion includes the following steps: Step S1: Add 0.02~0.1g of chitosan-modified graphene to 15ml of deionized water and sonicate at room temperature for 3h to obtain dispersion A; Step S2: Mix 3.75 mL of tetraethyl orthosilicate with 5 mL of ethanol, add 1.25 mL of hydrochloric acid solution dropwise, and stir magnetically for 24 h in a water bath at 30 °C to obtain 10 mL of dispersion B; Step S3: Mix dispersion A and dispersion B and heat and stir in a water bath at 30°C for 7 hours to fully mix, thus obtaining a composite film dispersion.

5. The tempered glass as described in claim 1, characterized in that, The preparation method of chitosan-modified graphene is as follows: 4g of graphene oxide is dispersed in 1000ml of deionized water, and then 2mg of acetic acid is added. The mixture is kept at a constant temperature in an ice-water bath and sonicated for 20min. Subsequently, 10g of chitosan is added to the above solution, and the mixture is heated and magnetically stirred at 95°C for 36h under a nitrogen atmosphere. After the reaction is completed, the solution is centrifuged and washed multiple times with ethanol and deionized water to remove unreacted chitosan. Finally, the solution is dried in a vacuum oven at 90°C for 12h to obtain chitosan-modified graphene powder.

6. The tempered glass as described in claim 5, characterized in that, The temperature of the ice water bath is <10°C.

7. The tempered glass as described in claim 1, characterized in that, The glass is lithium aluminum silicon glass.

8. The method for preparing reinforced glass according to any one of claims 1 to 7, characterized in that, The process includes the following steps: ultrasonicating the glass in ethanol, acetone, and deionized water for 15 minutes; spin-coating the composite film dispersion onto the glass surface at 25°C and 2500 r / min for 20 seconds using a spin coater; placing the glass in a tube furnace and heating it to 100°C at a rate of 2°C / min under nitrogen protection and holding it at that temperature for 1 hour; then heating it to 600°C at a rate of 2°C / min and holding it at that temperature for 2 hours; and finally cooling it to 25°C with the furnace to obtain chemically strengthened glass resistant to seawater corrosion for marine applications.

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