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Silver-carried fluor apatite antimicrobials and its preparation method

A technology of silver-loaded fluoroapatite and antibacterial agent, which can be applied in the fields of botanical equipment and methods, biocides, animal repellents, etc., and can solve the problems such as the inability to meet the needs of high temperature resistance.

Inactive Publication Date: 2003-03-12
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it still cannot meet the needs of high temperature resistance in practical applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The specific operation steps are as follows:

[0028] (1). Take 0.006mol Na 3 PO 4 and 0.002molNaF, dissolved in 500ml alcohol-water solution, is solution A, adjust the pH value to 10;

[0029] (2). Take 0.01mol Ca(NO 3 ) 2 4H 2 O and 0.001mol AgNO 3 , dissolved in 10mL deionized water, is solution B;

[0030] (3). At room temperature, add solution B directly to solution A in a state of high-speed stirring. At the beginning, the solution appears brown and turbid, and disappears immediately after 1 second. Finally, a translucent precipitate is obtained. Adjust the pH value of the system after the reaction is 7;

[0031] (4). Precipitate was obtained by high-speed centrifugation, and freeze-dried after repeated alcohol washing to obtain a white light flocculent powder;

[0032] (5). The above powder was heat-treated at 800° C. for 3 hours to obtain the final antibacterial agent as white powder. Test results and data:

[0033] sample

Embodiment 2

[0035] The specific operation steps are as follows:

[0036] (1). Take 0.012mol Na 3 PO 4 and 0.004molNaF, dissolved in 1000ml alcohol-water solution, is solution A, and the pH value of the control solution is 11;

[0037] (2). Take 0.02mol Ca(NO 3 ) 2 4H 2 O and 0.002mol AgNO 3 , dissolved in 20mL deionized water, is solution B;

[0038] (3). At room temperature, add solution B directly to solution A in a state of high-speed stirring. At the beginning, the solution appears brown and turbid, and disappears immediately after 1 second. Finally, a translucent precipitate is obtained. Adjust the pH value of the system after the reaction. is 8;

[0039](4). Precipitate was obtained by high-speed centrifugation, and then freeze-dried after repeated alcohol washing to obtain a white light flocculent powder.

[0040] (5). The above powder was heat-treated at 1000° C. for 2.5 hours to obtain the final antibacterial agent as white powder.

[0041] The raw materials used in the ...

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PUM

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Abstract

An Ag-carried fluor apatite as antibacterial agent is prepared through coprecipitation to prepare amorphous, nanoparticles of Ag-carried fluor apatite and high-temp calcining. Its advantages are high resistance to high temp (more than 1350 deg.C) and not colouring and yellowing of its products.

Description

technical field [0001] The invention relates to an inorganic antibacterial agent and its preparation, in particular to a silver-loaded fluoroapatite antibacterial agent and its preparation method. Background technique [0002] The development of inorganic antibacterial agents originated from the concern of the medical community for bacterial infections. In the mid-1980s, in order to improve the antibacterial durability of antibacterial fabrics, Japan’s Shinagawa Fuel Company used zeolite ion exchange to combine inorganic solid carriers and heavy metal ions to prepare inorganic antibacterial agents for the first time. Since then, this inorganic solid carrier and heavy metal ions The technology of combining the preparation of inorganic antibacterial agents has been developed and extended, and has been widely used in the manufacture of antibacterial products. [0003] Among antibacterial metal ions, silver ions (Ag + ) has the characteristics of broad-spectrum antibacterial, ...

Claims

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Application Information

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IPC IPC(8): A01N59/26
Inventor 冯庆玲叶彬崔福斋
Owner TSINGHUA UNIV
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