Preparation method of water-oil universal nano-silver antibacterial agent for antibacterial coating

Abstract

The invention discloses a preparation method of a water-oil universal nano-silver antibacterial agent for an antibacterial coating. The preparation method comprises the following steps: S1, preparinga solution A formed from a silver-ammonia solution and distilled water, S2, preparing a solution B formed from maltose, PVP, a dispersing agent and distilled water, S3, slowly and uniformly mixing thesolution A and the solution B, S4, carrying out ultrasonic heat preservation treatment on the mixed solution to obtain nano-silver sol, S5, preparing nano red silver sol, S6, modifying the high-purity sepiolite powder to obtain slurry C, S7, modifying the graphene powder, adding the slurry C, and performing bead milling to obtain graphene modified sepiolite nano-silver antibacterial slurry, and S8, carrying out vacuum drying to obtain the powdery water-oil universal nano-silver antibacterial agent. The composite antibacterial agent compounded by the process has the characteristics of convenience in addition, wide application range and long-acting and excellent antibacterial effect, and has a wide 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 general-purpose 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. The traditional antibacterial coating is an additive antibacterial coating, which is prepared by adding an antibacterial agent that has antibacterial function and can exist stably in the coating film and is processed by a certain process. [0003] In the additive type antibacterial coating, 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 loses the antibacterial performance. The a...

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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