Application of silica in antibacterial materials
Based on the large specific surface area, multi-media structure, strong adsorption capacity and strange physical and chemical properties of ultrafine silica, silver ions and other functional ions were evenly designed into the mesoporous of ultrafine silica, and the stable and successful development of durable, high temperature resistant, antibacterial nano antibacterial powder (only about 70 nm in diameter) was successfully developed It has reached or surpassed the similar products of Japan. After testing, when the water concentration of nano antibacterial powder is only 0.315, the antibacterial ability of gram-positive and gram-negative representative bacteria is very significantly revealed, the inhibition zone appears 2-3mm, and with the increase of nano antibacterial powder in water concentration, the inhibition zone increases significantly. According to the determination, when the content of Ag + in water is 0.01mg/l, E.coli in water can be killed, and can be maintained for up to 90 days, and no new flora is derived.
By using nano antibacterial powder in enamel glaze, the drum washing machine with mould proof and antibacterial function can be produced, and the antibacterial rate is more than 99. It can be used in enamel glaze under harsh conditions. It can still maintain strong antibacterial properties after firing in strong alkaline liquid and high temperature (about 900 ℃). By adding nano antibacterial powder into the interior wall coating, the interior wall coating with long-term antibacterial and antifungal function can be produced. Nano antibacterial powder was used in women's underwear detergent, wool, cashmere detergent, detergent, hand sanitizer. It was tested by health and epidemic prevention department that the antibacterial property was remarkable. Moreover, with the enhancement of people's health awareness, the application of nano antibacterial powder is more and more widely.