Technology for preparing surface-coated modified Ag/ZnO nano composite antibacterial agent

Abstract

The invention provides a technology for preparing a surface-coated modified Ag / ZnO nano composite antibacterial agent. The technology comprises the following steps: (1) adding sodium hexametaphoshpate serving as a dispersing agent into distilled water; (2) adding nano ZnO powder into the solution; (3) performing washing and filtering, and then drying the material in a constant-temperature drying oven at the temperature of 80-120 DEG C for 3-4 hours; (4) putting the material into a box type resistance furnace for roasting at the temperature of 600-800 DEG C for 2-4 hours; (5) taking out the material and grinding the material into raw powder of an Ag / ZnO nano composite antibacterial agent, adding the raw powder of the Ag / ZnO antibacterial agent into the distilled water, then adding a sodium laurate coating agent according to the mass ratio of the raw powder and the sodium laurate of 500 to 1, adjusting the pH value of the solution to 5-6, controlling the temperature of a water bath, and mechanically stirring the materials under the temperature range of 25-40 DEG C for 1-2 hours, filtering and drying the materials to obtain the surface-coated modified Ag / ZnO nano composite antibacterial agent. The surface-coated modified Ag / ZnO nano composite antibacterial agent disclosed by the invention is high in antibacterial performance and has a long-time antibacterial characteristic.

Description

Technical field [0001] The invention relates to the field of antibacterial materials, in particular to a process for preparing a surface-coated modified nano composite antibacterial agent. Background technique [0002] Antibacterial materials are new functional materials with bactericidal and antibacterial properties. The core component of antibacterial materials is antibacterial agents. Antibacterial agents are substances that prevent microorganisms such as bacteria and fungi from developing or inhibit their growth. Nano-ZnO not only has the characteristics of high activity, fast photocatalytic antibacterial speed, good thermal stability, long-term effectiveness and harmlessness to the human body, but also has the functions of purification, self-cleaning, and deodorization, so it has become a kind of photocatalysis that has attracted much attention. Type inorganic antibacterial agent. However, there are some problems with the use of photocatalytic antibacterial agents alone. F...

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Problems solved by technology

[0003] Although nano-ZnO has photocatalytic antibacterial properties and has been gradually applied in the antibacterial field, due to its weak photocatalytic ability and the need for ultraviolet radiation to reflect the photocatalytic ability, its antibacterial ability is compared with other antibacterial materials such as Ag / Ag + There is still a large gap, so the application is limited, especially in the application of plastics with strong coating effect. Due to the strong coating effect of plastics, the photocatalytic antibacterial ability of ZnO can hardly be reflected.

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