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Preparing method of nano-silver-based composite bactericide

A compound bactericide and nano-silver technology, applied in the field of environmental chemistry, can solve the problems of unsatisfactory bactericidal effect, complicated preparation process, and inability to firmly combine, and achieve superior environmental friendliness, saving the amount of bactericide, and good physical and chemical properties. Effect

Inactive Publication Date: 2017-11-10
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to propose a method for preparing a nano-silver-based 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 materials. The 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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  • Preparing method of nano-silver-based composite bactericide
  • Preparing method of nano-silver-based composite bactericide

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Measure 20 mL of 0.1 mol / L CaSO 4 Aqueous solution, 20 mL 0.06 mol / L NaH 2 PO 4 Add 0.02g of Triton X-100 to the aqueous solution, place 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; 1 g of the obtained hydroxyapatite powder and 1 mL of complexed 0.15 mol / 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 nano-silver-based composite fungicide.

Embodiment 2

[0021] Measure 20 mL of 0.1 mol / L CaSO 4 Aqueous solution, 20 mL 0.06 mol / L K 2 HPO 4 Add 0.02g of Triton X-100 to the aqueous solution, place the two solutions on both sides of the swim bladder, let it stand for 10 hours, until the system fully reacts, take the precipitates on both sides, wash and dry to obtain hydroxyapatite powder body; the obtained hydroxyapatite powder 1g and 2 mL 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 nano-silver-based composite fungicide.

Embodiment 3

[0023] Measure 20 mL of 0.1 mol / L CaCl 2 Aqueous solution, 20 mL 0.06 mol / L NaH 2 PO 4 Add 0.02g of polyethylene glycol to the aqueous solution, place 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 1 mL complexed completely 0.15mol / L AgNO 3 After mixing, glucose is added and then transferred to a hydrothermal kettle. After 24 hours of hydrothermal heating, the precipitate is suction-filtered and washed to obtain a nano-silver-based composite fungicide.

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Abstract

The invention belongs to the technical field of environmental chemistry, and particularly relates to a preparing method of a nano-silver-based composite bactericide. A hydroxyapatite nano-assembling ball chain with the length reaching micron order is used as a carrier, the characteristics of large superficial area and high surface activity of the bactericide are used, and silver ions are converted into nano silver on the surface of hydroxyapatite through in-situ reduction reaction to prepare the silver-based composite bactericide loaded by hydroxyapatite. The nano-silver-based composite bactericide easy to recover is high in chemical stability and large in superficial area and has high industrial feasibility, and compared with pure nano silver, the amount of the bactericide is saved remarkably on the premise of achieving the same sterilizing effect.

Description

technical field [0001] The invention belongs to the field of environmental chemistry, and in particular relates to a preparation method of a nano silver-based composite bactericide that can be used in the fields of environment, biology, medicine and the like. Background technique [0002] With the improvement of living standards, people's demand for sterile items is also increasing, so the sterilization of items has become a new research hotspot in the field of antibacterial today. At present, the fungicides on the market can be mainly divided into organic fungicides and inorganic fungicides, and organic fungicides have problems such as single antibacterial types, poor human friendliness, easy to make bacteria resistant, and poor thermal stability. Compared with organic fungicides, inorganic fungicides have obvious advantages in terms of extensiveness, safety, durability and thermal stability. Nano-silver and its composite materials are representatives of inorganic fungicide...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01P3/00
CPCA01N59/16
Inventor 刘金库苗敏张婧玉薛西子薛亚楠刘修芮袁晓宇徐婷王元元
Owner EAST CHINA UNIV OF SCI & TECH
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