A kind of preparation method of water-oil universal nano-silver antibacterial agent that can be used for antibacterial coating

Abstract

The invention discloses a preparation method of a water-oil universal nano-silver antibacterial agent that can be used for antibacterial coatings, comprising the following steps: S1, preparing A solution formed by silver ammonia solution and distilled water; S2, preparing maltose, PVP, dispersant and distilled water The formed B solution; S3, slowly mixing the A solution and the B solution; S4, carrying out ultrasonic heat preservation treatment on the mixed solution to obtain a nano-silver sol; S5, preparing a nano-red silver sol; S6, modifying the high-purity sepiolite powder properties, obtain C slurry; S7, modify graphene powder, add C slurry, and carry out bead milling to obtain graphene-modified sepiolite nano-silver antibacterial slurry; S8, carry out vacuum drying to obtain powdered Universal nano-silver antibacterial agent for water and oil. The compound antibacterial agent formed by compounding process of the present invention has the characteristics of convenient addition, wide application range, excellent long-term antibacterial effect and broad application prospect.

Description

technical field [0001] The invention relates to the technical field of antibacterial agents, in particular to a preparation method of a water-oil universal nano-silver antibacterial agent that can be used for antibacterial coatings. Background technique [0002] Antibacterial coatings are generally divided into additive antibacterial coatings and structural antibacterial coatings. Traditional antibacterial coatings are additive antibacterial coatings, which are made by adding an antibacterial agent that has antibacterial function and can exist stably in the coating film, and is processed by a certain process to obtain a coating with antibacterial function. [0003] In additive-type antibacterial coatings, the antibacterial agent is dispersed in the coating system as an auxiliary agent. Due to the migration, degradation, and discoloration of the antibacterial agent in the coating film, the antibacterial performance of the antibacterial coating is attenuated, or even lost. Ap...

AI Technical Summary

Problems solved by technology

Silver ions in inorganic silver-based antimicrobial agents are easily converted into brown silver oxide or black elemental silver through ultraviolet catalytic reduction, which not only reduces the antibacterial properties of coatings, but also limits its application in white or light-colored coatings

In addition, a large amount of precious metal silver is used, which makes the cost of antibacterial coatings relatively high, which restricts its application in a wider range

Photocatalytic oxide-type antibacterial agents need to be excited by ultraviolet light to have antibacterial properties, and the ultraviolet light that can be used in daily life is less, which also limits its wide application

Although composite antibacterial agents have excellent antibacterial properties, their applications are not widely used due to the differences in the compatibility of various antibacterial agents.

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