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Zeolite-loaded silver antibacterial agent and preparation method thereof

A technology of antibacterial agent and zeolite, which is applied in the field of preparation of zeolite silver-loaded antibacterial agent and its liquid-phase ion exchange, can solve the problems of high loading cost, product discoloration, and influence on product appearance, and achieve high stability, cost saving, and improvement The effect of mechanical properties

Inactive Publication Date: 2012-05-23
BEIJING JIASHENG CENTURY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the existing silver-loaded antibacterial agents are as follows: first, the silver salt ions released from silver salt antibacterial products are easily reduced to simple silver after being irradiated by sunlight or heated, and then oxidized to silver oxide, which not only changes the color of the product Affect the appearance of the product, and the poor stability reduces the antibacterial performance
Second, the load cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: direct exchange method

[0029] First carry out sodium treatment on natural clinoptilolite; weigh silver nitrate and zeolite respectively according to the ratio of silver content in zeolite material to 5%, accurately weigh a certain amount of sodium-type zeolite powder, and add concentration of 0.1mol / L respectively AgNO 3 solution (with AgNO 3 solution with a brown volumetric flask), and keep the solid-liquid ratio constant to make it fully carry out ion exchange (Ag + Avoid exposure to light during ion exchange), and adjust the pH value to 6.0-8.0 with dilute nitric acid and NaOH solution. After fully reacting, wash the silver-loaded zeolite with a centrifugal separator, and wash with distilled water until there is no Ag in the lotion. + , that is, drop in dilute hydrochloric acid without white precipitate; the exchanged zeolite is dried in an oven, and then ground and stored (the silver-exchanged zeolite should be protected from light).

Embodiment 2

[0030] Embodiment 2: indirect exchange method

[0031] First carry out sodium treatment on natural clinoptilolite; weigh silver nitrate and zeolite respectively according to the ratio of silver content in zeolite material to 5%, accurately weigh a certain amount of sodium-type zeolite powder, and add concentration of 0.1mol / L respectively NH 4 NO 3 In the solution, keep the solid-liquid ratio constant to make it fully ion-exchange, NH 4 + Substituting metal cations to form NH-loaded 4 + Zeolite, then add AgNO 3 solution, for NH 4 + with Ag + Ion exchange, and adjust the pH value to 6.0-8.0 with dilute nitric acid and NaOH solution. After fully reacting, wash the silver-loaded zeolite with a centrifugal separator, and wash it with distilled water until there is no Ag in the lotion. + , that is, drop in dilute hydrochloric acid without white precipitate; the exchanged zeolite is dried in an oven, and then ground and stored (the silver-exchanged zeolite should be protect...

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PUM

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Abstract

The invention discloses a zeolite-loaded silver antibacterial agent and a preparation method thereof, relating to an antibacterial agent, in particular to a zeolite-loaded silver antibacterial agent and a preparation method thereof. The zeolite-loaded silver antibacterial agent and the preparation method are characterized in that the bacteriostasis rate of the zeolite-loaded silver antibacterial agent is high, the zeolite-loaded silver antibacterial agent is used for producing high polymer material products, and the zeolite-loaded silver antibacterial agent still has the antibacterial performance even if the heat treatment temperature is 1100DEG C. The zeolite-loaded silver antibacterial agent comprises zeolite and silver, wherein zeolite accounts for 95%, and silver nitrate accounts for 5%. After the natural zeolite is subjected to sodium treatment, the natural zeolite and the silver nitrate carry out liquid phase ion exchange; after the zeolite and the silver nitrate fully react, the mixture is washed with distilled water until washing liquor contains no silver ions; and then, the obtained product is dried and sintered and is grinded into powder to obtain the zeolite-loaded silver antibacterial agent.

Description

technical field [0001] The invention relates to an antibacterial agent, in particular to a zeolite-loaded silver antibacterial agent and a preparation method thereof by liquid-phase ion exchange. Background technique [0002] With the continuous improvement of people's research and understanding of environmental microorganisms, while utilizing the beneficial properties of microorganisms, they are also very vigilant about their harmfulness as pathogenic bacteria. Microorganisms also cause decomposition, deterioration, and corruption of various industrial materials, cosmetics, and pharmaceuticals, thereby shortening product life. In a modern society where science and technology advances and people's living standards continue to improve, environmental protection has increasingly become the pursuit of human beings. Antibacterial materials are an important part of environmentally friendly materials. Therefore, the development and production of products that are closely related t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N25/08A01P1/00
Inventor 吕学丽张军伟
Owner BEIJING JIASHENG CENTURY TECH
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