High-strength antibacterial glass and preparation method thereof
An antibacterial glass and high-strength technology, which is applied in the field of high-strength antibacterial glass and its preparation, can solve the problems of poor scratch resistance and short service life of the film layer, and achieve small ion exchange, good antibacterial performance, and light transmittance. Good results
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[0024] One embodiment of the present invention proposes a kind of preparation method of high strength antibacterial glass, it comprises the following steps:
[0025] 1) putting glass into molten potassium nitrate for ion exchange to obtain exchanged glass;
[0026] Among them, potassium nitrate is used for ion exchange with glass, and potassium ions are ion-exchanged with some sodium ions in the glass, so that potassium ions enter the glass and increase the strength of the glass;
[0027] Preferably, the ion exchange temperature used in this embodiment is 400-500°C, and the exchange time is 2-12 hours, and the glass prepared by using the above ion exchange temperature and time has a large surface stress value;
[0028] Preferably, the glass used in this embodiment is one of soda lime glass, aluminosilicate glass and borosilicate glass; the above glass contains alkali metal ions;
[0029] 2) mixing potassium nitrate with at least one ionic compound among silver ion compounds, ...
Embodiment 1
[0038] Put the soda-lime glass into molten potassium nitrate, conduct ion exchange at 400°C for 2 hours, and obtain the exchanged glass; add 980g of potassium nitrate and 20g of silver nitrate into the molten salt tank, heat to melt, and exchange the glass Immerse completely in the mixture of molten potassium nitrate and silver nitrate, conduct ion exchange at 350°C for 2 minutes, take out the glass, cool it, and wash it to obtain high-strength antibacterial glass.
[0039] The surface stress value of the high-strength antibacterial glass in the present embodiment is 400MPa, and the antibacterial rate to E. The rate is 98.67%, and the percentage of silver ions on the surface is 0.05%, which is only 0.1% lower than that of glass without exchange.
Embodiment 2
[0041] Put the aluminosilicate glass into molten potassium nitrate, conduct ion exchange at 500°C for 12 hours to obtain the exchanged glass; add 990g of potassium nitrate and 10g of copper sulfate into the molten salt tank, heat to melt, and exchange The glass is completely immersed in the mixture of molten potassium nitrate and copper sulfate, ion-exchanged at 480°C for 120 minutes, the glass is taken out, cooled, and cleaned to obtain high-strength antibacterial glass.
[0042]The surface stress value of the high-strength antibacterial glass in the present embodiment is 457MPa, the antibacterial rate of E. coli is 96.32%, the antibacterial rate of Staphylococcus aureus is 95.88%, the antibacterial rate of Aspergillus flavus is 97.04%, and the antibacterial rate of Aspergillus niger The percentage of copper ions on the surface is 95.23%, which is only 0.7% lower than that of glass without exchange.
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