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Preparation method of inorganic superfine powder high-concentration solid-liquid suspension by adopting CND hyper-dispersant

An inorganic ultra-fine powder, ultra-dispersant technology, applied in mixing methods, chemical instruments and methods, dissolution and other directions, can solve the problems of high surface energy, large surface area, small particle size of ultra-fine powder, etc., and achieves a simple preparation method. Effect

Inactive Publication Date: 2010-10-27
BEIJING JIUYUAN DASHI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the small particle size, large surface area and high surface energy of ultrafine powder, it is very easy to produce spontaneous coagulation, showing strong agglomeration characteristics, especially easy to agglomerate to form secondary particles with larger particle size, so that the inorganic ultrafine powder The excellent properties cannot be brought into full play, seriously restricting the wide and effective application of inorganic ultrafine powders

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] (1). Mix the inorganic ultrafine powder and water medium at a ratio of 50:50 by weight, add 0.2-0.5% (for inorganic ultrafine powder) of CND hyperdispersant, and add 0.05-0.1% of auxiliary dispersion Mix thoroughly after dispersing.

[0012] (2). Stir the high-concentration solid-liquid suspension prepared in (1) vigorously for 10 minutes, and then ultrasonically disperse it for 10 minutes. After further dispersion, inorganic ultrafine powder / aqueous medium stable high-concentration solid-liquid suspension can be obtained liquid.

Embodiment 2

[0014] (1). Mix the inorganic ultrafine powder and water medium at a ratio of 60:40 by weight, add 0.5-2% (for inorganic ultrafine powder) of CND hyperdispersant, and add 0.1-0.3% of auxiliary dispersion Mix thoroughly after dispersing.

[0015] (2). Stir the high-concentration solid-liquid suspension prepared in (1) vigorously for 15 minutes, and then ultrasonically disperse it for 15 minutes. After further dispersion, inorganic ultrafine powder / aqueous medium stable high-concentration solid-liquid suspension can be obtained liquid.

Embodiment 3

[0017] (1). Mix the inorganic ultrafine powder and water medium at a ratio of 70:30 by weight, then add 1-6% (for inorganic ultrafine powder) of CND hyperdispersant, and then add 0.1-0.5% of auxiliary After the dispersant, mix thoroughly to disperse.

[0018] (2). Stir the high-concentration solid-liquid suspension prepared in (1) vigorously for 20 minutes, and then ultrasonically disperse it for 8 minutes. After further dispersion, the inorganic ultra-fine powder / water medium stable high-concentration solid-liquid suspension can be obtained liquid.

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Abstract

The invention specially relates to a preparation method of an inorganic superfine powder / water medium high-concentration solid-liquid suspension, belonging to the fields of granule technologies, chemical materials and preparation methods. In the preparation method, a steric hindrance repulsion action is formed to realize the stable dispersion of inorganic superfine powder in a water medium by adopting the absorption of a CND hyper-dispersant on the surface of the inorganic superfine powder so that the uniformly and stably dispersed high-concentration solid-liquid suspension is prepared. The invention ensures that the inorganic superfine powder has stable suspension characteristics by uniformly dispersing the inorganic superfine powder into the water medium through the absorbing modification of the CND hyper-dispersant on the surface of the inorganic superfine powder and achieves the weight percentage concentration (the weight percentage of the inorganic superfine powder and the water medium) by 70 percent; in addition, the high-concentration solid-liquid suspension can be stably placed for 6-12 months without obvious laying and sediment and can be applied to the fields of coatings, electronic display materials, and the like.

Description

technical field [0001] The invention belongs to the field of particle technology, chemical materials and preparation methods, and in particular relates to a preparation method of inorganic ultrafine powder / aqueous medium high-concentration solid-liquid suspension. Background technique [0002] Inorganic ultrafine powder is a kind of important powder material widely used in industrial fields such as coatings, plastics, papermaking and ink. [0003] Due to the small particle size, large surface area and high surface energy of ultrafine powder, it is very easy to produce spontaneous coagulation, showing strong agglomeration characteristics, especially easy to agglomerate to form secondary particles with larger particle size, so that the inorganic ultrafine powder The excellent properties cannot be brought into full play, seriously restricting the wide and effective application of inorganic ultrafine powders. [0004] There have been many studies on the dispersion of ultrafine ...

Claims

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Application Information

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IPC IPC(8): B01F3/12
Inventor 任俊刘晓玲
Owner BEIJING JIUYUAN DASHI TECH
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