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Macroporous titanium dioxide nano-silver-supporting antibacterial auxiliary agent preparation method

A nano-silver antibacterial and titanium dioxide technology, applied in botanical equipment and methods, biocides, disinfectants, etc., can solve problems such as damage to human health, unpleasant odor, and poor appearance of plastics, reducing costs and man-made losses , the effect of small distribution

Inactive Publication Date: 2017-11-17
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Plastic products (involving food packaging, household appliances, bathroom facilities, kitchen utensils, etc.) are frequently in contact with each other in daily life. Except for biodegradable plastics, most plastics are not decomposed by bacteria, so the surface of most plastic products is easily contaminated. And breed a variety of pathogenic bacteria and become the medium of infectious diseases, especially in humid environment, bacteria are more likely to multiply on the plastic surface, resulting in poor plastic appearance, and produce unpleasant stench, and damage human health at the same time

Method used

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  • Macroporous titanium dioxide nano-silver-supporting antibacterial auxiliary agent preparation method
  • Macroporous titanium dioxide nano-silver-supporting antibacterial auxiliary agent preparation method
  • Macroporous titanium dioxide nano-silver-supporting antibacterial auxiliary agent preparation method

Examples

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Effect test

Embodiment 1

[0034] A preparation method of macroporous titanium dioxide loaded nano-silver antibacterial additive, comprising the following steps:

[0035] (1) Put the polystyrene emulsion into a clean watch glass after ultrasonic treatment, and then put the watch glass into an oven at 50°C to slowly evaporate the solvent water, leaving a layer of 4-5mm thick at the bottom of the watch glass. The millimeter-colored colloidal crystal film is the colloidal crystal template;

[0036] (2) Spread the polystyrene colloidal crystal template powder evenly on the filter paper at the bottom of the Buchner funnel, apply negative pressure to the Buchner funnel with a vacuum pump, and mix tetraethyl titanate and absolute ethanol at a mass ratio of 7: 3. The mixed solution is added dropwise to the polystyrene colloidal crystal template powder through a dropper until it is completely wet; Remove excess polystyrene crystal template powder to obtain three-dimensional ordered macroporous titanium dioxide;...

Embodiment 2

[0040] A preparation method of macroporous titanium dioxide loaded nano-silver antibacterial additive, comprising the following steps:

[0041] (1) Dilute the polystyrene emulsion forty times and put it into a clean beaker, then take a clean slide and put it into the beaker vertically, then place the beaker in a water bath at 50°C until the polystyrene After the evaporation of the solvent water in the emulsion, a colloidal crystal film with a thickness of 0.1 mm is produced on the slide, which is the colloidal crystal template;

[0042] (2) Spread the polystyrene colloidal crystal template powder evenly on the filter paper at the bottom of the Buchner funnel, apply negative pressure to the Buchner funnel with a vacuum pump, and mix tetraethyl titanate and absolute ethanol at a mass ratio of 7: 3 The mixed solution was added dropwise to the polystyrene colloidal crystal template powder through a dropper until it was completely wet; then it was placed in the air for drying, and ...

Embodiment 3

[0047] A preparation method of macroporous titanium dioxide loaded nano-silver antibacterial additive, comprising the following steps:

[0048] (1) Put the polystyrene emulsion into a clean watch glass after ultrasonic treatment, and then put the watch glass into an oven at 50°C to slowly evaporate the solvent water, leaving a layer of 4-5mm thick at the bottom of the watch glass. The millimeter-colored colloidal crystal film is the colloidal crystal template;

[0049] (2) Spread the polystyrene colloidal crystal template powder evenly on the filter paper at the bottom of the Buchner funnel, apply negative pressure to the Buchner funnel with a vacuum pump, and mix tetraethyl titanate and absolute ethanol at a mass ratio of 7: 3. The mixed solution is added dropwise to the polystyrene colloidal crystal template powder through a dropper until it is completely wet; Remove excess polystyrene crystal template powder to obtain three-dimensional ordered macroporous titanium dioxide;...

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Abstract

The invention discloses a macroporous titanium dioxide nano-silver-supporting antibacterial auxiliary agent preparation method, which comprises: preparing a colloid crystal template from a polystyrene glue sphere; adding the mixed solution of tetraethyl titanate and absolute ethanol onto the colloid crystal template through a drip tube in a dropwise manner until completely wetting the colloid crystal template, and preparing three-dimensional ordered macroporous titanium dioxide through a sol-gel method; and pouring the macroporous titanium dioxide into a AgN03 solution, and carrying out gamma ray irradiation to load nano-silver particles onto the TiO2 so as to form the macroporous titanium dioxide nano-silver-supporting antibacterial auxiliary agent. According to the present invention, the elemental silver is supported on the TiO2, such that the cost of the silver-based inorganic antibacterial agent can be reduced, the high specific surface area of the carrier can be completely utilized, and the silver-loaded antibacterial agent can be added to clothing fibers, plastics, building materials and household appliances so as to expand the applications of the antibacterial material.

Description

technical field [0001] The invention belongs to the field of preparation of novel plastic antibacterial additives, and in particular relates to a preparation method of macroporous titanium dioxide loaded nano-silver antibacterial additives. technical background [0002] People come into contact with all kinds of bacteria-carrying objects every day, such as telephones, washing machines, computers, electrical switches, etc., which will become sources of bacterial pollution and disease transmission. To this end, researchers have carried out research work on various antibacterial materials and antibacterial products. Among all kinds of antibacterial products, antibacterial plastics have been widely concerned in recent years because they are closely related to people's lives. The research work on antibacterial plastics began in the 1980s. In recent years, antibacterial plastics in developed countries such as Japan, the United States, and Western Europe have developed greatly, es...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/08A01P1/00
CPCA01N25/08A01N59/16A01N2300/00
Inventor 杨桂生计娉婷朱敏廖雄兵
Owner HEFEI GENIUS NEW MATERIALS
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