Preparation method of silver alloy composite nanomaterial

A technology of composite nanomaterials and silver alloys, which is applied in the field of preparation of silver alloy composite nanomaterials, can solve the problems of difficulty in uniform distribution of particle size, difficulty in guaranteeing product purity, and decline in antibacterial performance, so as to achieve simple and controllable production process and excellent bactericidal performance Stable and reliable, not easy to reunite and grow up

Active Publication Date: 2018-02-09
曹文
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are different degrees of technical obstacles in the production method of nano-silver and in the popularization and application of various industries.
[0003] 1. At present, most nano-silver is produced by chemical methods. Nano-silver exists in the reaction solution, and solid-liquid separation is difficult. Industrialization is restricted, and the purity of the product is difficult to guarantee.
The waste liquid generated in the production process pollutes the environment
[0004] 2. The nano-silver powder extracted from the solution is easy to form agglomerates and difficult to disperse again
[0005] 3. Usually, the physical preparation method of nano-silver is only suitable for laboratory operation, and it needs to be protected by inert gas such as argon and helium. In the absence of protection of inert gas, silver is easily oxidized to form silver oxide. Affect the antibacterial effect
Moreover, the particle size is difficult to distribute uniformly
Heating to 300°C can completely remove the oxygen element and reduce it to metallic silver. However, large particle aggregates are formed, and the antibacterial performance is greatly reduced.

Method used

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  • Preparation method of silver alloy composite nanomaterial
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  • Preparation method of silver alloy composite nanomaterial

Examples

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Effect test

Embodiment 1

[0036] A preparation method of silver alloy copper oxide composite nanopowder, which comprises the following steps:

[0037] 1. Prepare materials.

[0038] Using 70% silver wire with a diameter of 0.5mm and a purity of 99.9%, and 30% copper wire with a diameter of 0.5mm and a purity of 99.9%, the silver and copper wires are woven into a mixed metal wire with a diameter of 8mm. Cold-rolled and rolled into metal wire rods with a diameter of 5 mm.

[0039] 2. Vaporization.

[0040] Silver and copper metal wire rods are used as anode conductors, the DC voltage is 36V, the current is 1050A, the arc length is 30mm, and the temperature is above 5000°C.

[0041] 3. Condensation.

[0042] At the same time as the metal is vaporized, the gaseous alloy is separated from the high temperature area by the air flow of 1 times the speed of sound, and the gaseous alloy is rapidly cooled, so that when the metal returns to the solid state from the gaseous state, composite particles of 10nm to ...

Embodiment 2

[0048] A preparation method of silver alloy zinc oxide composite nanopowder, which comprises the following steps:

[0049] 1. Prepare materials.

[0050] Use 80% silver wire with a straight diameter of 0.5mm and a purity of 99.9%, 20% zinc wire with a diameter of 0.5mm and a purity of 99.9%, and weave the silver and zinc wires into a mixed metal wire with a diameter of 8mm. After cold rolling and calendering, it becomes a metal wire rod with a diameter of 5mm.

[0051] 2. Vaporization.

[0052] Silver and zinc metal wire rods are used as anode conductors, the DC voltage is 32 volts, the current is 980 amps, the arc length is 28 mm, and the temperature is above 5000 ° C.

[0053]3. Condensation.

[0054] At the same time as the metal is vaporized, the gaseous alloy is separated from the high-temperature area by an air flow of 1.2 times the speed of sound, and is cooled rapidly, so that when the metal returns from the gaseous state to a solid state, composite particles of 10n...

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Abstract

The invention provides a preparation method of a silver alloy composite nanomaterial. The preparation method comprises the following steps of conducting preparation on the combination of silver and atleast one of copper, zinc, magnesium, aluminum and titanium to obtain a composite metal wire rod; gasifying and evaporating the tip end of the metal wire rod of an anode conductor through electric arc formed by a cathode with the composite metal wire rod as the anode conductor of a DC power supply to generate a smoke-like metal radical, and fully mixing silver metal atoms and at least one of copper, zinc, magnesium, aluminum and titanium to form a gaseous alloy; rapidly cooling the gaseous alloy through air flow at 0.5-1.5 hypersonic velocity along with metal gasification; collecting cooled powder to obtain the silver alloy composite nanomaterial. By means of the technical scheme, the silver alloy composite nanomaterial prepared through the preparation method is not prone to agglomerationand grow-up and is more stable and reliable in bactericidal performance. Moreover, the production process is simple and controllable. Energy consumption is little. Scale production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a preparation method of a silver alloy composite nano material. Background technique [0002] Silver has been recognized as a safe and reliable bactericidal material. The bactericidal effect of nano-silver is difficult to be replaced by other inorganic materials. However, there are different degrees of technical obstacles in the production method of nano-silver and in the popularization and application of various industries. [0003] 1. At present, most nano-silver is produced by chemical methods. Nano-silver exists in the reaction solution, and solid-liquid separation is difficult. The industrialization is restricted, and the purity of the product is difficult to guarantee. The waste liquid generated in the production process pollutes the environment. [0004] 2. The nano-silver powder extracted from the solution is easy to form agglomerates and diffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/12B22F9/14B82Y40/00B22F1/054
CPCB22F9/12B22F9/14B82Y40/00A63B2209/00B22F1/054C22C1/0466A41D31/30A41D31/00A63B71/1225B22F2301/255B22F2304/054A41D2500/00C22C5/06C22C5/08D06N2211/10D06N2205/103D06N3/00D06N3/009D06N7/0055Y10T442/2082
Inventor 曹文
Owner 曹文
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