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Nano-metallic material, preparation method of nano-metallic material and micro-jet equipment

A metal material and nano-metal technology, applied in the field of nano-materials, can solve the problems of the valve core not being resistant to wear, easy to be damaged, and easy to block the needle-shaped injection port, so as to achieve the effect of solving easy blockage.

Active Publication Date: 2018-02-06
贵州瑞诚新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The first object of the present invention is to provide a micro-fluidic device that uses the cooperation between the valve core and the valve seat under high pressure to change the annular gap through the relative movement between the valve core and the valve seat Size to achieve the adjustment of the throttling area, so as to generate high-speed jet flow, and then realize the crushing, shearing and refining of metal materials, wherein the valve core adopts diamond valve core, so that it can prepare metal powder with high hardness , which improves the defect that the traditional valve core is not wear-resistant and easily damaged, and needs to be replaced frequently; at the same time, a slit channel is set on the valve seat for metal materials to pass through, which solves the technical problem that the traditional needle-shaped injection port is easy to block

Method used

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preparation example Construction

[0056] According to another aspect of the present invention, there is also provided a method for preparing a nano-metal material, using the above-mentioned micro-fluidic device comprising the following steps:

[0057] (1) Mix the metal material, dispersant, thickener and optional metal complexing agent, and stir to obtain a metal dispersion;

[0058] (2) Move the metal dispersion to the feeding chamber of the micro-fluidic equipment. Under the action of the piston, the metal dispersion in the feeding chamber passes through the slit channel on the valve seat and the gap between the valve core and the valve seat. The annular gap enters the reaction chamber, and after several times of micro-jet circulation, a nano-metal solution is obtained;

[0059] (3) centrifuging the nano-metal solution and drying the nano-metal precipitate to obtain a nano-metal material.

[0060] The invention provides a method for preparing a nanometer metal material. The preparation method has simple pro...

Embodiment 1

[0088] A preparation method of nano silver powder, comprising the steps of:

[0089] (1) Mix silver powder, ethanol, water, polyethylene glycol and sodium polyacrylate at 60°C, and stir to obtain a metal dispersion;

[0090] Wherein, according to weight fraction, silver powder accounts for 1% by weight of raw materials, polyethylene glycol accounts for 1% by weight of raw materials, sodium polyacrylate accounts for 0.3% by weight of raw materials, and ethanol accounts for 1% by weight of raw materials. %, water to make up the balance to 100%.

[0091] (2) Move the metal dispersion to a micro-fluidic device, and process it once in a 200MPa micro-fluidic cycle to obtain a nano-metal solution.

[0092] (3) Precipitate the nano-silver obtained after the nano-metal solution is centrifuged, and dry to obtain a nano-silver powder.

Embodiment 2

[0094] A preparation method of nano silver powder, comprising the steps of:

[0095] (1) Mix silver powder, ethanol, water, polyethylene glycol and sodium polyacrylate at 60°C, and stir to obtain a metal dispersion;

[0096] Wherein, according to weight fraction, silver powder accounts for 1% by weight of raw materials, polyethylene glycol accounts for 1% by weight of raw materials, sodium polyacrylate accounts for 0.3% by weight of raw materials, and ethanol accounts for 1% by weight of raw materials. %, water to make up the balance to 100%.

[0097] (2) Move the metal dispersion to the micro-fluidic equipment, and after the 200MPa micro-fluidic circulation treatment once, use the pinhole micro-fluidic equipment to perform the recirculation treatment at 300MPa once again to obtain the nano-metal solution.

[0098] (3) Precipitate the nano-silver obtained after the nano-metal solution is centrifuged, and dry to obtain a nano-silver powder.

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Abstract

The invention provides a nano-metallic material, a preparation method of the nano-metallic material and micro-jet equipment and relates to the technical field of nano materials. According to the micro-jet equipment, the throttling area is adjusted by changing the circular gap between a valve core and a valve seat under the cooperative effect of the valve core and the valve seat under the high pressure, so that a high-speed jet is produced, and a metallic material is crushed, sheared and thinned; the valve core is made of a diamond material, metallic powder at the relatively high hardness can be prepared from the material, and thus the defects that a traditional valve core is not wear-resistant, is easy to damage and is required to be changed frequently are overcome; and meanwhile, a slit type passage is arranged on the valve seat for passing of the metallic material, so that the technical problem that a traditional needle-shaped jet port is blocked easily is solved. The invention further provides the preparation method of the nano-metallic material. The micro-jet equipment is adopted in the preparation method, and the preparation method is simple in technology, convenient to operate, low in energy consumption, small in heating value, safe, environment-friendly and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a nanometer metal material, a preparation method thereof, and a microfluidic device. Background technique [0002] Due to their unique microstructure, nanomaterials exhibit a series of effects different from traditional materials, such as volume effect, surface effect, quantum size effect, quantum tunneling effect, and dielectric confinement effect. Many physical and chemical aspects such as melting point, vapor pressure, optical properties, chemical reactivity, magnetism, superconductivity and plastic deformation show special properties. It is these properties that make nanomaterials attract great attention from the scientific community and be applied in many fields. At present, the preparation, characterization and application of nanomaterials have become research hotspots. As an important branch of nanomaterials, nanometal materials have been widely used in aerospace, ...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F9/04B22F1/00B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00B22F9/04B22F9/24B22F2009/044B22F1/054
Inventor 韦勇
Owner 贵州瑞诚新材料技术有限公司
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