Method for preparing ultrafine inorganic powder dispersion

A technology of inorganic powder and inorganic powder material, which is applied in the direction of dyeing polymer organic compound treatment, fibrous filler, dyeing physical treatment, etc., to achieve the effect of preventing mutual aggregation, simple operation and wide adaptability

Inactive Publication Date: 2012-07-18
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a simple and efficient method for preparing uniform and stable ultrafine inorganic powder dispersion liquid for the dispersion of ultrafine inorganic powder in the preparation process of existing thermosetting polymer composite materials

Method used

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  • Method for preparing ultrafine inorganic powder dispersion
  • Method for preparing ultrafine inorganic powder dispersion
  • Method for preparing ultrafine inorganic powder dispersion

Examples

Experimental program
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Effect test

Embodiment 1

[0028]20g of epoxy resin prepolymer (E44, Baling Petrochemical) was added into 20g of acetone and stirred and dissolved, and the resulting mixed solution was used as a dispersion medium; 160g of barium sulfate with an average particle diameter of 2 μm was added to a sand mill, and then the dispersed The medium is added and the speed of the sand mill is 3500rpm, and the sand is milled for 180min. The solid content of barium sulfate in the dispersion liquid is 80wt%.

Embodiment 2

[0030] Under nitrogen protection, 14.95g of 1,3-bis(4-aminophenoxy)benzene was added to 120g of N,N'-dimethylacetamide until completely dissolved, then 15.1g of 3 was added in batches under mechanical stirring, 3',4,4'-biphenyltetraacid dianhydride, and react with stirring at a reaction temperature below 30°C for 6 hours to obtain a polyamic acid resin solution.

[0031] After premixing 16.7g of titanium dioxide with an average particle size of 100nm and the above polyamic acid resin solution, first mix it in a high-speed mixer with a rotation speed of 5000rpm for 30min, and then ball mill it in a ball mill with a rotation speed of 600rpm for 180min. The solid content of titanium dioxide in the dispersion was 10 wt%.

Embodiment 3

[0033] 60g epoxy resin prepolymer (Epon 828, Shell) is added in 40g methyl ethyl ketone and carry out stirring and dissolving, the mixed solution that obtains is used as dispersion medium; The silica of 75g average particle diameter 500nm is added in the planetary ball mill earlier, then 50 g of the prepared dispersion medium was added and ball milled for 60 min at a rotation speed of 500 rpm. The solid content of silicon dioxide in the dispersion was 60 wt%.

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Abstract

The invention discloses a method for preparing ultrafine inorganic powder dispersion. The method comprises the following steps of: adding 10 to 60 weight percent of prepolymer of thermosetting polymer into an organic solvent, and stirring for dissolving to obtain a dispersion medium; and adding 10 to 80 weight percent of ultrafine inorganic powder material into a device with strong shearing action, adding the prepared dispersion medium, and performing strong shearing action for 10 to 300 minutes to obtain stable and uniform dispersion of ultrafine inorganic powder particles. The characteristic of the dispersion medium is changed by adding the prepolymer of the polymer, and uniform and stable ultrafine inorganic powder dispersion is obtained by combining strong mechanical shearing action, so the preparation process is mature and easy to operate, complex equipment is not needed, multiple kinds of ultrafine inorganic powder can be dispersed on a large scale, and the application range is wide; and the obtained product is high in solid content, the using amount of the organic solvent is small, viscosity is low (less than 300cPa.s), and the dispersion has high liquidity and long shelf life and is easily mixed with other components uniformly.

Description

technical field [0001] The invention belongs to the technical field of ultrafine powder dispersion, in particular to a preparation method of ultrafine inorganic powder dispersion liquid. The method is to add a certain amount of thermosetting polymer prepolymer in the organic solvent, make it completely dissolved, and then use it as the dispersion medium of the ultrafine inorganic powder, and disintegrate the agglomeration and fragmentation of the ultrafine inorganic particles through strong shearing. A method for obtaining a uniform and stable dispersion. The dispersion liquid can be widely used as a raw material in the preparation of composite materials. Background technique [0002] The synthesis, preparation and application of inorganic ultrafine powder materials have become one of the most eye-catching research fields in the scientific and technological circles. Compared with bulk materials, ultrafine inorganic powders exhibit many unique properties in terms of optics,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/10C09C3/04C09C1/02C09C1/36C09C1/28C09C1/40C08K9/04C08K3/36C08L63/00
Inventor 陈枫陈立傅强柴颂刚苏晓声
Owner SICHUAN UNIV
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