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Method for production of silver-carring foam metal with disinfecting and sterilizing function

A metal foam, sterilization and disinfection technology, applied in botany equipment and methods, biocides, animal repellants, etc.

Inactive Publication Date: 2005-11-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In further searches, there is no report of loading silver on metal foam to make antibacterial materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Select foamed nickel metal with a connected porosity of 90-95% VOL (volume percentage) as the carrier, pre-treat and activate the foamed nickel, and then uniformly plate 0.1-2 microns on its surface by electroplating, electroless plating or displacement plating. of silver plating. Then the silver-loaded nickel foam mesh is used for air filtration and purification of air purifiers, central air conditioners, and household air conditioners, which has a very obvious effect, and can effectively kill the germs that are filtered and adsorbed on the foam metal mesh.

Embodiment 2

[0014] The silver-loaded hydroxyapatite nanopowder slurry was prepared by chemical precipitation method. According to Ca9.5Ag0.5 (PO 4 ) 6 (OH) 2 Composition, weigh Ca(NO 3 ) 2 ·6H 2 O 23.6g was dissolved in 400ml distilled water to prepare Ca(NO 3 ) 2 solution. Weigh AgNO 3 0.85g dissolved in the above Ca(NO 3 ) 2 solution, mixed evenly to obtain A solution.

[0015] Take another (NH 4 ) 2 HPO 4 7.92g was dissolved in 200ml of distilled water, 15ml of ammonia water was measured, and dissolved in the above (NH 4 ) 2 HPO 4 solution, after mixing evenly, dilute the solution to 400ml to obtain B solution.

[0016] Add the above B solution drop by drop to the A solution, keep stirring, and control the solution temperature to 30°C. At this time, the solution starts to become turbid, and there is precipitation. After the drop is complete, stop stirring, and keep the solution for 12 hours. . After suction filtration and washing with water several times, the obtai...

Embodiment 3

[0020] The preparation method of the silver-loaded hydroxyapatite nanopowder slurry is the same as in Example 2.

[0021] After the slurry obtained by the above method was dried, it was calcined at 800° C. for 4 hours. The obtained powder is added with 0.5% organic additive as a slurry stabilizer according to the mass ratio, and additionally 30% of nano titanium oxide particles are added to prepare a stable slurry in a planetary ball mill.

[0022] Spray the slurry on the surface of the nickel foam filter and let it dry in a ventilated place. The modified silver-loaded hydroxyapatite sterilization filter can be obtained by drying in an oven at 120° C. for 8 hours.

[0023] The modified silver-loaded hydroxyapatite bactericidal filter is applied to air purification and filtration, and the photocatalytic effect of nano-titanium dioxide is used with ultraviolet light irradiation, which has better ability to kill germs.

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Abstract

The present invention relates to the field of air and water purifying technology, and is the preparation of silver-carrying foamed metal with sterilizing function. Foamed metal with certain pores or porosity suitable for filtered fluid is selected as carrier, and its surface is coated with silver or silver containing compound via electroplating, chemical plating or other physical or chemical process to produce the silver-carrying foamed metal with sterilizing function. The present invention has the features of great silver carrying surface area, high carrier strength and high bactericidal efficiency. For ever higher pathogenic bacteria killing capacity, hydroxyapatite and titanium dioxide with synergistic effect are also used. This kind of foamed metal has wide application foreground in purifying air and water.

Description

technical field [0001] The invention relates to a preparation method of silver-loaded foamed metal, in particular to a preparation method of silver-loaded foamed metal with sterilization and disinfection functions, and belongs to the technical field of refrigeration. Background technique [0002] There are a large number of bacteria in the objects that people frequently touch in their daily work and life, as well as in the air. These bacteria mainly include Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Aspergillus flavus, etc., which can cause diseases such as dysentery, food poisoning, typhoid fever and even cancer, directly threatening people's health. The atypical pneumonia disease (SARS), which is spreading and spreading all over the world, is also caused by a coronavirus that is highly transmissible in the air. Research and development of highly efficient, non-toxic (low toxicity), durable antibacterial agents and antibacterial materials is a major t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/16A01N59/16
Inventor 胡文彬常程康刘磊刘河洲丁文江
Owner SHANGHAI JIAO TONG UNIV
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