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Particle surface treatment method for improving dispersion stability of metal powder in high-viscosity system

A technology of dispersion stability and particle surface, which is applied to the particle surface to improve the dispersion stability of metal powder in high viscosity system. In the field of particle surface treatment, it can solve problems such as poor dispersion stability and achieve good uniformity and integrity. , The treatment process is simple, and the uniformity is improved.

Active Publication Date: 2017-05-17
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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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 solve the problem of poor dispersion stability of metal powder in high-viscosity systems, and provide a simple metal powder surface coating method, which slows down its sedimentation rate and improves the dispersion stability of metal powder in high-viscosity systems sex

Method used

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  • Particle surface treatment method for improving dispersion stability of metal powder in high-viscosity system
  • Particle surface treatment method for improving dispersion stability of metal powder in high-viscosity system
  • Particle surface treatment method for improving dispersion stability of metal powder in high-viscosity system

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Embodiment 1

[0026] A particle surface treatment method for improving the dispersion stability of metal powder in a high-viscosity system, comprising the following steps:

[0027] (1) ultrasonically disperse aluminum powder with a particle size of 5 μm in ethanol to obtain a concentration of 5 mg / ml, and ultrasonically clean for 10 minutes;

[0028] (2) After suction filtering the cleaned solid particles, dry them in an oven at 60° C. for 5 hours;

[0029] (3) Configure 100ml of buffered aqueous solution of Tris at a concentration of 10mM;

[0030] (4) dissolving dopamine hydrochloride in the Tris solution, the concentration of dopamine hydrochloride after dissolving is 2g / L, and the solution pH value is 8.5;

[0031] (5) Put 6g of aluminum powder in the above-mentioned solution, use a stirrer to stir and mix the dispersion at a speed of 400r / min, and the stirring time is 12h;

[0032] (6) Suction filter and wash the stirred dispersion liquid, and use distilled water to wash 3 times;

...

Embodiment 2

[0035] A particle surface treatment method for improving the dispersion stability of metal powder in a high-viscosity system, comprising the following steps:

[0036] (1) ultrasonically disperse copper powder with a particle size of 50 μm in ethanol to obtain a concentration of 5 mg / ml, and ultrasonically clean for 10 min;

[0037] (2) After suction filtering the cleaned solid particles, dry them in an oven at 60° C. for 5 hours;

[0038] (3) 100ml of buffered aqueous solution of Tris at a concentration of 10mM,

[0039] (4) dissolving dopamine hydrochloride in the Tris solution, the concentration of dopamine hydrochloride after dissolving is 4g / L, and the solution pH value after dissolving completely is 8.5;

[0040] (5) Put 6g of copper powder in the solution of the above configuration, use a stirrer to stir and mix the dispersion at a speed of 400r / min, and the stirring time is 12h;

[0041] (6) Suction filter and wash the stirred dispersion liquid, and use distilled wate...

Embodiment 3

[0044] A particle surface treatment method for improving the dispersion stability of metal powder in a high-viscosity system, comprising the following steps:

[0045] (1) ultrasonically disperse iron powder with a particle size of 0.5 μm in ethanol to obtain a concentration of 5 mg / ml, and ultrasonically clean for 10 minutes;

[0046] (2) After suction filtering the cleaned solid particles, dry them in an oven at 60° C. for 5 hours;

[0047] (3) Configure 100ml of buffered aqueous solution of Tris at a concentration of 10mM;

[0048] (4) dissolving dopamine hydrochloride in the Tris solution, the concentration of dopamine hydrochloride after dissolving is 3g / L, and the solution pH value after dissolving completely is 8.5;

[0049] (5) Put 3g of aluminum powder in the above-mentioned solution, use a stirrer to stir and mix the dispersion at a speed of 400r / min, and the stirring time is 18h;

[0050] (6) Suction filter and wash the stirred dispersion liquid, and use distilled ...

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Abstract

The invention discloses a particle surface treatment method for improving dispersion stability of metal powder in a high-viscosity system. The particle surface treatment method includes the following steps that firstly, metal powder particles are ultrasonically dispersed in ethyl alcohol; secondly, metal powder particles are subjected to extraction filtration, and drying is conducted; thirdly, an alkali solution is prepared; fourthly, catechol matter is dissolved in the alkali solution; fifthly, metal powder is put in the above configured solution to be stirred, and a disperse solution is formed; seventhly, the stirred dispersed solution is subjected to extraction filtration cleaning, and distilled water is used for conducting cleaning for 2-5 times; and seventhly, the cleaned material is dried, and surface-coated metal powder is obtained. The metal powder surface treatment technology is simple, the evenness and completeness of the metal powder surface treatment material are good, the adhesive force of the catechol matter and a metal powder surface is high, disengaging and gathering phenomena cannot happen in the mixing process, and the dispersion stability of the particles in a bonding agent can be improved.

Description

technical field [0001] The invention relates to a particle surface treatment method, in particular to a particle surface method for improving the dispersion stability of metal powder in a high-viscosity system, and belongs to the technical field of material surface modification. Background technique [0002] Due to its high density, metal powder added as a filler in a high-viscosity system has poor dispersion stability and is prone to sedimentation, which will affect the composition and density uniformity of the composite material, and ultimately have a negative impact on the performance of the material. [0003] For the study of dispersion stability of high-viscosity suspension systems, the most commonly used and reliable method is the sedimentation method. According to Stokes' law, the sedimentation rate of solid particles in a suspension under the action of a gravitational field is mainly related to the particle size, the density difference between the particle and the li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00
CPCB22F1/102
Inventor 肖春谢虓祝青罗观李尚斌
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS