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Inorganic powder organic surface modifying method

A technology of inorganic powder and surface modification, applied in dyeing organosilicon compound treatment, fibrous filler, etc., can solve the problem of inability to disperse inorganic ultrafine particles

Active Publication Date: 2008-03-05
江苏河海纳米科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiencies and problems of the above-mentioned prior art, and to provide a method for organic surface modification of inorganic powder, which overcomes the inability to uniformly mix inorganic ultrafine particles in the organic surface modification process in conventional methods. Dispersed in a non-polar organic solvent, the application of this method can make the organic surface modification of the inorganic powder in a good dispersion state, and significantly improve the effect of the organic surface modification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 3g of attapulgite and add it into 100g of distilled water, and use FS-1200 ultrasonic dispersion processor to ultrasonically disperse for 60min to make an aqueous dispersion of attapulgite. Add 500g of toluene to a 1000ml three-necked flask, add n-octyltriethoxysilane as alkoxysilane, the quality of n-octyltriethoxysilane is 0.9g, stir to make n-octyltriethoxysilane completely Dissolve in toluene, and then add the above-mentioned attapulgite aqueous dispersion. The three-neck flask was placed in an electric heating mantle, stirred vigorously and heated continuously. When boiling, a large amount of mixed steam will be generated. The mixed steam will be condensed through the condenser, and the toluene and water in the condensed liquid will be separated by a liquid separator. When the steam temperature rises to the boiling point of toluene (about 110.8° C.), the heating is stopped, and the organic surface modification process ends. Cool the toluene suspension contai...

Embodiment 2

[0021] Add 50 g of fumed silica (Degussa, Germany) into 500 g of distilled water, and ultrasonically disperse the resulting silica suspension for 40 min with an FS-1200 ultrasonic dispersing processor to prepare a silica aqueous dispersion. Add 250g of benzene in a 1000ml three-necked flask, add vinyltrimethoxysilane as alkoxysilane, the quality of vinyltrimethoxysilane is 7.5g, stir to make vinyltrimethoxysilane completely dissolve in benzene, and then The above-mentioned aqueous dispersion of silicon oxide was added. The three-neck flask was placed in an electric heating mantle, stirred vigorously and heated continuously. When boiling, a large amount of mixed steam will be generated. The mixed steam will be condensed through the condenser, and the benzene and water in the condensed liquid will be separated by a liquid separator. When the steam temperature rises to the boiling point of benzene (about 80.1° C.), the heating is stopped, and the organic surface modification pro...

Embodiment 3

[0023] Add 3.2 g of sodium hexametaphosphate to 400 g of distilled water, and after dissolving the sodium hexametaphosphate, add 400 g of rutile titanium dioxide (R902, DuPont, USA) to prepare a titanium dioxide slurry. Use zirconia balls with a diameter of about 1 mm as the grinding medium, and grind the titanium dioxide slurry for 60 minutes in a SK-2 sand mill to obtain a titanium dioxide aqueous dispersion. Add 300g xylene to a 1000ml three-necked flask, then add silane coupling agent KH-570 (γ-methacryloxypropyltrimethoxysilane) as alkoxysilane, the mass ratio of KH-570 is 4g , Stir to completely dissolve KH-570 in xylene, and then add the above-mentioned titanium dioxide aqueous dispersion. The three-neck flask was placed in an electric heating mantle, stirred vigorously and heated continuously. When boiling, a large amount of mixed steam will be generated. The mixed steam will be condensed through the condenser, and the xylene and water in the condensed liquid will be ...

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Abstract

The present invention provides process of organizing the surface to modify inorganic powder, and during the process, inorganic superfine particles are dispersed homogeneously in non-polar organic solvent and have the surfaces well organization modified. The process includes preparing water solution for dispersing inorganic powder, dissolving organic surface modifier, organic surface modifying, solid-liquid separating and washing, and post-treatment. The process features that oil-water interface and phase transfer are utilized for organic surface modification of inorganic superfine powder in non-polar organic solvent.

Description

technical field [0001] The invention relates to a powder organic surface modification method, more specifically to a method for inorganic powder organic surface modification. Background technique [0002] The surface of inorganic powder is hydrophilic, suitable for use in polar systems. However, when it is added to organic systems such as plastics, rubber, chemical fibers, solvent-based coatings, and oil-based cosmetics, it is difficult to disperse and cannot reflect the special functions of inorganic powder materials. In order to improve the compatibility and dispersibility of inorganic powders in organic systems, organic surface modification must be carried out on inorganic powders. [0003] According to different application systems of inorganic powder, different organic surface modifiers should be selected. There are many kinds of organic surface modifiers. According to their solubility differences, they can be mainly divided into two categories: water-soluble and oil-...

Claims

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Application Information

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IPC IPC(8): C09C3/12C09C1/00
Inventor 姚超成庆堂徐斌海聂天琛李峰李为民王茂华
Owner 江苏河海纳米科技股份有限公司
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