Process for the preparation of antimicrobial mould inhibitor

Abstract

The invention relates to a preparation method of an antisepsis and antimildew agent. The preparation method is that: polysaccharid water solubility adhesive agent is dissolved in an acid solution and then nanometer titanium dioxide is added into the acid solution, each one gram of the adhesive agent is added with 0.01 to 10 grams of the nanometer titanium dioxide, at last the mixed agent is added with an organic cross-linking agent to make the antisepsis anti mildew agent, each one gram of the adhesive agent is added with 0.1 to 100 ml of the organic cross-linking agent, during the preparing process of the invention, the antisepsis and antimildew agent can be added with cellulosic latex, metallic ions and high molecule sterilization auxiliary agent etc., which results in synergistic effects of a plurality of bactericidal agents, in addition, dried and formed into film, the invention which is coated on the surfaces of articles has antisepsis and mildew proof effects. Within two hours after using the invention, the sterilizing rate is more than 90 percent, the sterilizing rate is nearly 100 percent within four hours, and the sterilizing rate can be maintained more than 90 percent within twenty-four hours, resulting from time efficiency of the invention.

Description

technical field [0001] The invention relates to a preparation method of an antibacterial and antifungal agent, in particular to the preparation of an antibacterial and antifungal agent containing nano-titanium dioxide. The obtained antibacterial and antifungal agent can be sprayed on the surface of articles requiring antibacterial to form a film to sterilize and prevent mildew. Background technique [0002] Nano-TiO2 is a non-eluting antibacterial agent based on photocatalytic reaction to decompose organic matter and has antibacterial effect. It has good chemical stability, non-toxicity, low heavy metal content, broad-spectrum and long-term antibacterial properties. The more widely used in people's daily life. At present, there are antibacterial products prepared by using nano-titanium dioxide. Generally, nano-TiO2 sol is used to treat the surface of objects. For example, Cui Zuolin, Yu Zida, and Zhang Zhikun proposed a nano-TiO2 2 The preparation method of the sol (applic...

AI Technical Summary

Problems solved by technology

In the antibacterial coating of the above literature, the bactericidal effect is mainly enhanced by adding silver ions and nano-titanium dioxide composites. The antibacterial effect of silver ions is very strong, but its chemical properties are active, and it is easy to transform into brown silver oxide or reduce to black elemental silver. , the discoloration occurs

In addition, the cost of using a large amount of silver is very high, and it is harmful to the human body, which limits its application.

[0003] In recent years, polysaccharide biomaterials such as chitosan have been valued and applied due to their excellent properties such as biodegradation, regeneration, antibacterial and antiseptic, and good film-forming properties. Poisonous and environmentally friendly antibacterial materials have opened up new ways, such as: Dong Zhanfeng et al. in "Journal of Functional Polymers" in December 2002, Volume 48, No. 6 "Chitosan / nano-TiO 2 Preparation and Performance Research of Composite Membranes" and "Chitosan / Gelatin / TiO 2 In "Preparation and Functional Research of Ternary Composite Membranes", it is proposed to use chitosan and anion-modified nano-TiO 2 , a new type of degradable antibacterial composite packaging film was prepared by the solution blending method. This method added natural polymers such as gelatin to improve the mechanical properties of the film. However, since these natural polymers are the nutrient source for bacteria, chitosan The bactericidal and antibacterial performance has been reduced, so the bactericidal ability of the composite film is not ideal, and the composite film is mainly used to prepare antibacterial packaging bags, the scope of use is limited, and the processing cost is high

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