Flexible antibacterial glass and preparation method thereof

Abstract

The invention relates to a preparation method of flexible antibacterial glass, which is characterized by comprising the following steps: (1) putting a flexible glass sample into an ethanol solution for ultrasonic cleaning, then cleaning with deionized water, and drying at constant temperature for later use; (2) dissolving dopamine in a NaOH solution, placing the solution on a magnetic stirrer, and carrying out stirring reaction at room temperature to generate polydopamine; (3) soaking the pretreated flexible glass sample into a polydopamine solution, and washing with deionized water after soaking is finished; and (4) loading the glass sample in a solution containing silver nanoparticles, fixing the silver nanoparticles in the polydopamine coating through an electrostatic adsorption effect, and finally carrying out vacuum drying on the obtained sample until no obvious water residue exists on the surface. The method has the advantages that by constructing the PDA coating, the hydrophilicity and biocompatibility of the surface of the flexible glass are improved, the binding capacity of the flexible glass and silver ions is enhanced, and the stability and durability of an antibacterial agent on the surface of the flexible glass are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of flexible glass preparation, and relates to a flexible antibacterial glass and a preparation method thereof. Background Art

[0002] As a new type of material, flexible glass has broad application prospects in electronic displays, biomedicine and other fields due to its advantages of high strength, flexibility and good light transmittance. However, its surface antibacterial properties are relatively weak, making it a breeding ground for bacteria, especially in medical equipment and daily necessities. This problem is particularly prominent. Currently, most antibacterial glass methods load silver ions on the surface of flexible glass. However, direct silver ion loading may face the problem of weak bonding with the flexible glass surface, causing the silver ions to easily fall off or lose during use, affecting the antibacterial effect. Summary of the Invention

[0003] The purpose of the present invention is to make up for the shortcomings of the existing technology and provide a method for preparing flexible antibacterial glass. The method improves the hydrophilicity and biocompatibility of the flexible glass surface by constructing a layer of polydopamine (PDA) coating, while enhancing its binding ability with silver ions, thereby obtaining a flexible antibacterial glass with stronger stability and more lasting antibacterial effect.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows: A method for preparing flexible antibacterial glass, characterized by comprising the following steps: (1) Flexible glass pretreatment: Select flexible glass samples and place them in ethanol solution for ultrasonic cleaning to remove surface oil, dust and other impurities. Then rinse with deionized water and dry in a constant temperature oven for later use. (2) Preparation of polydopamine solution: dissolve dopamine in an alkaline solution (NaOH solution), place it on a magnetic stirrer, and stir at room temperature. Under alkaline conditions, dopamine will undergo oxidative self-polymerization to generate polydopamine; (3) Polydopamine coating: The pretreated flexible glass sample is immersed in a polydopamine solution. During the immersion process, polydopamine molecules will adhere to the glass surface through adsorption, forming a uniform coating. After the immersion, it is gently rinsed with deionized water to remove the unattached polydopamine. (4) Silver ion loading: The glass sample is placed in a solution containing silver nanoparticles (silver nanoparticles are evenly distributed in deionized water to obtain a 2-5 mol / L solution containing silver nanoparticles). The silver nanoparticles are fixed in the polydopamine (PDA) coating by electrostatic adsorption. Finally, the obtained sample is placed in a vacuum drying oven at 50-80°C and dried until there is no obvious moisture residue on the surface.

[0005] Furthermore, the batch materials of the flexible glass are SiO2: 55-65%, Al2O3: 16-25%, Na2O: 5-12%, K2O: 1-5%, MgO: 5-10%, and ZrO2: 0-2%.

[0006] Furthermore, the melting temperature of the batch material is 1550-1700°C.

[0007] Furthermore, the concentration of dopamine in step (2) is 0.1-1 mol / L.

[0008] Furthermore, the stirring time in step (2) is 4-24 hours.

[0009] Furthermore, the soaking time in step (3) is 1-12 hours.

[0010] Furthermore, the soaking temperature in step (3) is 10-45°C.

[0011] Furthermore, the loading time in step (4) is 2-24 hours.

[0012] Furthermore, the load temperature in step (4) is 10-70°C.

[0013] The present invention first coats polydopamine on the flexible glass and then loads silver ions, ensuring close bonding between the PDA and the flexible glass, thereby improving the stability and durability of the loaded silver ions on the surface of the flexible glass. At the same time, the PDA coating has good chemical stability and can resist erosion from the external environment, helping to protect the silver ions from the influence of the external environment and extending their service life.

[0014] The beneficial effects of the present invention are as follows: the present invention improves the hydrophilicity and biocompatibility of the flexible glass surface by constructing a PDA coating, while enhancing its binding ability with silver ions, thereby improving the stability and durability of the antibacterial agent on the flexible glass surface, effectively resisting external erosion, and helping to protect the antibacterial agent from the influence of the external environment. In addition, the present invention is simple to operate, the raw materials are readily available, and no special equipment or technology is required. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with various embodiments: A method for preparing flexible antibacterial glass, the specific implementation steps are as follows: Example 1

[0016] (1) Select a flexible glass sample and place it in an ethanol solution for ultrasonic cleaning to remove surface oil, dust and other impurities, then rinse it with deionized water and dry it in a constant temperature oven for later use; (2) Dissolve 2 g of dopamine powder in a NaOH solution with a pH of 8.5, then place the solution on a magnetic stirrer and stir at room temperature for 12 h to obtain a dopamine solution with a concentration of 0.5 mol / L; (3) The pretreated flexible glass sample was completely immersed in the polydopamine solution at room temperature. During the immersion process, the container was gently shaken to promote the uniform distribution of polydopamine on the glass surface. After soaking for 2 h, it was gently rinsed with deionized water to remove the unattached polydopamine. (4) The glass sample coated with polydopamine was placed in a solution containing silver nanoparticles (silver nanoparticles were evenly distributed in deionized water to obtain a 3 mol / L solution containing silver nanoparticles) at room temperature for 4 h. The silver nanoparticles were fixed in the PDA coating by electrostatic adsorption. Finally, the obtained sample was placed in a vacuum drying oven at 60 °C and dried until no obvious moisture remained on the surface. Example 2

[0017] The same preparation method as in Example 1 is adopted, except that the soaking time in step (3) of this example is 1-12 hours. Example 3

[0018] The same preparation method as in Example 1 was used, except that in step (3) of this example, the pretreated flexible glass sample was completely immersed in a polydopamine solution at 10-45°C. Example 4

[0019] The same preparation method as in Example 1 was used, except that in step (2) of this example, a dopamine solution with a concentration of 0.1-1 mol / L was obtained.

[0020] Comparative Example 1 (without PDA coating) (1) Select a flexible glass sample and place it in an ethanol solution for ultrasonic cleaning to remove surface oil, dust and other impurities, then rinse it with deionized water and dry it in a constant temperature oven for later use; (2) The treated flexible glass substrate was immersed in a graphene oxide solution at room temperature for 5 minutes, taken out and blown dry with ammonia. Then, the flexible glass substrate was immersed in a silver ion solution at room temperature. After 5 minutes, the substrate was taken out at a pulling speed of 10m / s and blown dry with nitrogen to obtain a flexible antibacterial glass without PDA coating.

[0021] The antibacterial properties of the samples obtained were tested in accordance with the standard JC / T 1054-2007. After inoculating bacteria for different periods of time, the obtained glass samples (Examples 1-4, Comparative Example 1) and untreated samples were tested. The antibacterial rate was calculated by subtracting the bacterial count (B) on the surface of the obtained glass samples from the bacterial count (A) on the surface of the untreated samples, divided by the bacterial count (A) on the surface of the untreated samples, and multiplying the result by 100. The antibacterial test results of the obtained samples are shown in Table 1.

[0022]

[0023] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, utilize the methods and technical contents disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change, and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A method for preparing flexible antibacterial glass, characterized in that The steps include: (1) Select a flexible glass sample and place it in an ethanol solution for ultrasonic cleaning, then rinse it with deionized water, and dry it in a constant temperature oven for later use; (2) Dopamine was dissolved in NaOH solution, placed on a magnetic stirrer, and stirred at room temperature to react and generate polydopamine; (3) Immerse the pretreated flexible glass sample in a polydopamine solution and rinse with deionized water to remove the unattached polydopamine. (4) The glass sample is loaded in a solution containing silver nanoparticles, and the silver nanoparticles are fixed in the polydopamine coating by electrostatic adsorption. Finally, the obtained sample is vacuum dried until there is no obvious moisture residue on the surface.

2. The method for preparing a flexible antibacterial glass according to claim 1, characterized in that: The batch materials of the flexible glass are SiO2: 55-65%, Al2O3: 16-25%, Na2O: 5-12%, K2O: 1-5%, MgO: 5-10%, and ZrO2: 0-2%.

3. The method for preparing a flexible antibacterial glass according to claim 2, characterized in that: The melting temperature of the batch material is 1550-1700°C.

4. The method for preparing a flexible antibacterial glass according to claim 1, characterized in that: The concentration of dopamine in step (2) is 0.1-1 mol / L.

5. The method for preparing a flexible antibacterial glass according to claim 1, characterized in that: The stirring time in step (2) is 4-24 hours.

6. The method for preparing a flexible antibacterial glass according to claim 1, characterized in that: The soaking time in step (3) is 1-12 hours.

7. The method for preparing a flexible antibacterial glass according to claim 1, characterized in that: The soaking temperature in step (3) is 10-45°C.

8. The method for preparing a flexible antibacterial glass according to claim 1, characterized in that: The loading time in step (4) is 2-24 hours.

9. The method for preparing a flexible antibacterial glass according to claim 1, characterized in that: The load temperature in step (4) is 10-70°C.

10. The method for preparing a flexible antibacterial glass according to any one of claims 1 to 9, characterized in that: The temperature of vacuum drying in step (4) is 50-80°C.

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