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Nano-metal powder dispersion liquid and its preparation method

A technology of nano metal powder and dispersion liquid, which is applied in the field of nanometers, can solve the problems of dispersion liquid without dispersant, poor storage stability, affecting adaptability, etc., and achieve the effect of good monodispersity, low product cost and easy use

Inactive Publication Date: 2004-07-21
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: (1) it contains binder, which affects the adaptability of use; (2) special equipment-ultra-high pressure dispersing device is needed to open the agglomerate and prepare slurry, resulting in large production investment and high cost
U.S. Patent No. 6,214,259 reports the preparation of a dispersion that contains solvent and ultrafine copper particles. Its deficiency is that there is no dispersant in the dispersion, so the storage stability is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 8g of propylene glycol and 8g of diethylene glycol ethyl ether acetate into a 300ml beaker, then add 3.95g of dispersant Homogenol L-95, 3.95g of dispersant EFKA-701, then add 75g of 50nm nano silver powder and 1.1g of stabilizer AEROSIL 130, After dispersing for 25 minutes with a high-speed disperser at 1000 rpm, grind for 10 hours with a sand mill to make a dispersion with a weight ratio of 75% of the nano-silver powder, wherein the total amount of the dispersant is 7.9%.

Embodiment 2

[0023] Add 14g of cyclohexane and 14g of cyclohexanone into a 300ml beaker, then add 9.2g of dispersant Disperbyk2000, then add 60g of 80nm nano-copper powder and 2.8g of stabilizer AEROSIL 130, disperse with a high-speed disperser at 2000rpm for 20 minutes, and then use a ball mill Grind for 7 hours to prepare a dispersion liquid with a weight ratio of 60% of nanometer copper powder, wherein the total amount of dispersant is 9.2%.

Embodiment 3

[0025] The preparation method of nanometer copper powder dispersion liquid is the same as embodiment 2, wherein the ratio of hexanaphthene and cyclohexanone addition is the same as embodiment 2, adjusts the addition amount of polymer dispersant Disperbyk2000 and nanometer copper powder, makes the polymer dispersant Disperbyk2000 The total amount is 0.5%, and the dispersion liquid with a weight ratio of nanometer copper powder of 60% is made.

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PUM

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Abstract

A nano-class metal particles dispersed liquid is prepared from metallic nanoparticles, disperser, stabilizer and dispersing medium through sequentially and proportionally mixing, mechanically dispersing for 15-60 min, and grinding for 20 min-18 hr. Its advantages are high content of solid, low viscosity, and high dispersity and stability.

Description

technical field [0001] The invention relates to nanotechnology, in particular to a nanometer metal powder dispersion and a preparation method thereof. Background technique [0002] Nano-metal particles have quantum size effect, small size effect, surface effect, macroscopic quantum tunneling effect, and many peculiar electrical, optical, and magnetic properties, making them widely used in aerospace, atomic energy, military, electronics, chemical, metallurgy and other industries. important application value. [0003] Many literatures have reported the preparation methods of nano metal particles. For example, U.S. Patent No. 6,121,191 reported a method for preparing metal ultrafine particles loaded with photocatalysts; U.S. Patent No. 6,203,768 reported a process for mechanically activating chemical reactions to produce ultrafine particles; U.S. Patent No. Particle bioprocessing methods. At present, as the production process of nano-metal particles matures, its application ...

Claims

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Application Information

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IPC IPC(8): B01F3/12B22F9/00
Inventor 刘福春韩恩厚柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI