Preparation method of nano silver suspending liquid

Abstract

The invention discloses a preparation method of nano-silver suspension, which comprises adding silver nitrate solution into pure water, mixing and diluting it into an available silver nitrate aqueous solution, and then adding a certain dose of ammonia water (coordinating agent) into the silver nitrate within a specified time. In the aqueous solution, carry out silver-ammonia complexation reaction and ion coordination, then the mixed solution is heated and removed in stages, and a kind of spherical nano-silver particle water suspension liquid is obtained (the content range of silver is 5-1000ppm; The particle size is 0.1-20nm).

Description

technical field [0001] The invention relates to a nano-silver suspension preparation, which can be applied to ceramic materials, environmental protection materials, electronic materials, coating industry and the like, in particular to a nano-silver preparation with high-efficiency sterilization, antibacterial and anti-inflammatory effects. Background technique [0002] Silver has been used for thousands of years. By the 1930s, a variety of silver elements and compounds were used for antibacterial treatment. A large number of research results show that silver has many advantages such as non-toxic, non-allergic, non-drug resistance, and no cross-drug interference when used in antibacterial therapy. Organisms, which have respiratory enzymes to keep them alive, the silver meets the respiratory enzymes and binds to them, causing the bacteria to die. Compared with ordinary silver, the nano-silver suspension prepared by the present invention has a qualitative leap in high-efficien...

AI Technical Summary

Problems solved by technology

The single-injection dripping method usually adopts the method of slow dripping to realize the low concentration of the reactants to participate in the reaction. Although this reduces the concentration of one of the reactants to a certain extent, it cannot make the two reactants at a low concentration at the same time. reaction, the growth rate of particles cannot be reduced to the greatest extent, and there is a lack of corresponding supporting devices to assist in solving the problem of reactant concentration, which eventually leads to larger particles with wider distribution

The single injection dripping method makes the production cycle longer and is not suitable for industrial production; and in the above preparation method, due to the lack of corresponding desalination treatment process, the reaction by-products and redundant ions cannot be removed, which restricts the molding of the product. It affects the stability and dispersibility of the product, and further improvement is needed in the preparation process and preparation equipment

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