A dendrified bactericidal microsphere and its preparation method and application

Abstract

The invention provides a novel tree-like sterilization micro-sphere, a preparation method thereof and an application. The preparation method includes the steps: taking chloromethylation polystyrene micro-spheres as an initiating core; taking ethidene diamine and methyl acrylate as a molecular chain; performing synthesis and fixing on 3-generation PAMAM (polyamidoamine) tree-like macromolecules by the aid of Michael addition reaction and a divergent method; taking sulfanilamide as a functional group, and performing quaternized modification to obtain the tree-like sterilization micro-sphere. The novel tree-like sterilization micro-sphere avoids 'secondary pollution' of water caused by traditional sterilizing agents and can effectively solve the problem that soluble sterilizing agents remain in the water, so that food safety is ensured, the application range of the sterilizing agents is widened, the sterilization micro-sphere can be recovered and reused, and the use ratio of the resources can be effectively increased.

Description

technical field [0001] The invention belongs to the technical field of synthesis and modification of dendrimers, and in particular relates to a novel dendritic bactericidal microsphere and its preparation method and application. Background technique [0002] Water is the source of life, the basis for human survival and development, and one of the important natural resources necessary for the development of the world economy. At present, the average amount of water available per capita in the world is 7,300 cubic meters per year, which has dropped by 37% compared with 1970. In the late 1980s, the actual freshwater utilization of the earth was about 300 billion m 3 per year, accounting for 1-3% of the total available water sources, but with the rapid development of industry and population in modern society, people's demand for water has increased by hundreds of millions, and the requirements for water quality have also become higher and higher. The amount of water available ...

AI Technical Summary

Problems solved by technology

Sterilization refers to the killing of pathogenic bacteria in the object. There may be non-pathogenic bacteria such as spores or thermophilic bacteria in the object. The above two types of substances can achieve the effect of sterilization, but traditional fungicides also have insurmountable shortcomings : When the content of organic matter in the water source is slightly high, oxidizing fungicides such as chlorine gas sterilization will produce chlorinated organic matter, which can cause cancer; and the stability is not good, easy to decompose, the cost of transportation and storage is high, and there are potential threats such as explosion; in industrial water treatment , Poor peeling and washing effect on bacterial scale and slime

Since the use of water-soluble fungicides in water and liquid food will cause certain hazards, oxidizing fungicides will produce toxic by-products, and non-oxidizing fungicides are residual toxicity problems, and there is a risk of "secondary pollution"

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