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Method for in-situ preparing nano-silver compound bactericide

A compound bactericide, in-situ preparation technology, applied in the field of material chemistry, can solve the problems of unsatisfactory bactericidal effect, inability to bond firmly, complicated preparation process, etc., achieve superior environmental friendliness and human safety, good physical and chemical properties, The effect of improving the bactericidal performance

Inactive Publication Date: 2012-09-12
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose an in-situ preparation method of a nano-silver composite bactericide, obtain superior bactericidal performance, a new type of composite bactericide in which nano-silver is firmly combined with hydroxyapatite as a carrier, and solve the problem of existing silver and carrier The material preparation process is complicated, the combination cannot be firmly combined, the bactericidal effect is not ideal, and it is difficult to recycle. At the same time, it can effectively reduce the amount of silver required to kill a unit of bacteria, improve the use efficiency of bactericides, and reduce the cost of bactericides.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Measure 20mL0.1mol / L CaCl 2 Aqueous solution, 20mL0.06mol / L KH 2 PO 4 Add 0.02 g of polyethylene glycol to the aqueous solution, place the two solutions on both sides of the casing, let stand for 10 hours, until the system fully reacts, take the precipitates on both sides, wash and dry to obtain hydroxyapatite powder; The obtained hydroxyapatite powder 1g and 3mL complexed completely 0.15mol / LAgNO 3 After mixing, add ascorbic acid and transfer to a hydrothermal kettle. After 24 hours of hydrothermal heating, filter and wash the precipitate to obtain a hydroxyapatite / silver composite fungicide.

Embodiment 2

[0016] Measure 20mL 0.1mol / L CaSO 4 Aqueous solution, 20mL 0.06mol / L K 2 HPO 4 Add Triton-1000.02g to the aqueous solution, place the two solutions on both sides of the swim bladder, let stand for 10 hours, until the system fully reacts, take the precipitates on both sides, wash and dry to obtain hydroxyapatite powder; The obtained hydroxyapatite powder 1g and 2mL complexed completely 0.15mol / L AgNO 3 After mixing, add hydrazine hydrate and transfer to a hydrothermal kettle. After 24 hours of hydrothermal heating, filter and wash the precipitate to obtain a hydroxyapatite / silver composite fungicide.

Embodiment 3

[0018] Measure 20mL 0.1mol / L CaCl 2 Aqueous solution, 20mL 0.06mol / L NaH 2 PO 4 Add 0.02g of polyethylene glycol to the aqueous solution, put the two solutions on both sides of the egg membrane, let it stand for 10 hours, until the system fully reacts, take the precipitates on both sides, wash and dry to obtain hydroxyapatite powder ; The obtained hydroxyapatite powder 1g and 1mL complexed completely 0.15mol / LAgNO 3 After mixing, add glucose and transfer to a hydrothermal kettle. After 24 hours of hydrothermal heating, filter and wash the precipitate to obtain a hydroxyapatite / silver composite fungicide.

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Abstract

The invention belongs to the technical field of material chemistry, and particularly relates to a method for in-situ preparing a nano-silver compound bactericide. The method is that a hydroxyapatite nano assembled ball chain with the length of micron order is taken as a carrier, the characteristics of the large surface area and high surface activity of the hydroxyapatite nano assembled ball chain are utilized, silver ions are converted into nano-silver on the hydroxyapatite surface through in-situ reduction reaction, so a hydroxyapatite / silver compound bactericide is prepared. The nano-silver compound bactericide has high chemical stability, good recovery performance, and can effectively kill various bacteria, the bactericidal efficiency is greatly improved because of the larger surface area of the nano-silver compound bactericide, under the premise of realizing the same bactericidal effect, the bactericide usage can be saved by about 30-40% compared with pure nano-silver, and the nano-silver compound bactericide has very strong industrial practicability.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to an in-situ preparation method of a nano-silver composite fungicide. Background technique [0002] As we all know, various living items are prone to breed harmful bacteria and even produce harmful chemicals. With the improvement of living standards, people's demand for sterilization of living utensils is also increasing, so various fungicides have become a new research hotspot in the field of antibacterial today. At present, fungicides on the market can be mainly divided into organic fungicides and inorganic fungicides, while organic fungicides mainly have many problems such as single antibacterial types, greater harm to human body, easy to make bacteria resistant, poor thermal stability, etc. . Inorganic fungicides have obvious advantages in terms of extensiveness, safety, persistence and thermal stability. Nano-silver and its composite materials are one of the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N25/08A01P1/00
Inventor 刘金库王建栋罗重霄谢洪珍
Owner EAST CHINA UNIV OF SCI & TECH
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