Method of preparing sericite ultraviolet radiation screening agent

A technology of sericite and ultraviolet rays, applied in chemical instruments and methods, inorganic pigment treatment, other chemical processes, etc., can solve problems such as effect discount, easy aggregation of nanoparticles, poor dispersion, etc., to achieve saving in dosage and coating performance Good, simple process effect

Inactive Publication Date: 2007-10-24
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these oxide nanoparticles have a certain function of shielding ultraviolet rays, individual nanoparticles are easy to agglomerate and have poor dispersion. In practical applications, the effect is often greatly reduced. This is also currently affecting the application of nano-oxide UV shielding agents. an important reason

Method used

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  • Method of preparing sericite ultraviolet radiation screening agent
  • Method of preparing sericite ultraviolet radiation screening agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method of sericite ultraviolet shielding agent, it comprises the steps:

[0035] 1), the preparation of fine sericite powder: the sericite after separation and purification is pulverized to 10~15 μm with a stirring mill, and fine sericite powder is obtained, wherein the purity of the sericite after purification is ≥ 95% (mass content);

[0036] 2), activation of sericite powder: mix and stir with sulfuric acid with a mass concentration of 10% and fine sericite powder to obtain slurry A, the mass concentration of sericite in slurry A is 5%, heat in a water bath at 60° C., and react for 30 minutes; Filter the filter cake, wash the filter cake to neutrality, add phosphoric acid with a mass concentration of 8%, mix and stir to obtain slurry B, the mass concentration of sericite in slurry B is 5%, heat in a water bath at 65°C, and react for 30 minutes; Filter, wash until neutral, and dry at 95°C to obtain activated sericite powder;

[0037]3), add water to the...

Embodiment 2

[0046] A preparation method of sericite ultraviolet shielding agent, it comprises the steps:

[0047] 1), the preparation of fine sericite powder: the sericite after separation and purification is pulverized to 10~15 μm with a stirring mill, and fine sericite powder is obtained, wherein the purity of the sericite after purification is ≥ 95% (mass content);

[0048] 2), activation of sericite powder: mixing and stirring with sulfuric acid with a mass concentration of 13% and fine sericite powder to obtain slurry A, the mass concentration of sericite in slurry A is 8%, heating in a water bath at 62° C., and reacting for 40 minutes; Filter the filter cake, wash the filter cake to neutrality, add phosphoric acid with a mass concentration of 9%, mix and stir to obtain slurry B, the mass concentration of sericite in slurry B is 8%, heat in a water bath at 68°C, and react for 40 minutes; Filter, wash until neutral, and dry at 95°C to obtain activated sericite powder;

[0049] 3), ad...

Embodiment 3

[0056] A preparation method of sericite ultraviolet shielding agent, it comprises the steps:

[0057] 1), the preparation of fine sericite powder: the sericite after separation and purification is pulverized to 10~15 μm with a stirring mill, and fine sericite powder is obtained, wherein the purity of the sericite after purification is ≥ 95% (mass content);

[0058] 2), the activation of sericite powder: mixing and stirring with sulfuric acid with a mass concentration of 15% and fine sericite powder to obtain slurry A, the mass concentration of sericite in slurry A is 10%, heating in a water bath at 65° C., and reacting for 60 minutes; Filter the filter cake, wash the filter cake to neutrality, add phosphoric acid with a mass concentration of 10%, mix and stir to obtain slurry B, the mass concentration of sericite in slurry B is 10%, heat in a water bath at 70°C, and react for 60 minutes; Filter, wash until neutral, and dry at 95°C to obtain activated sericite powder;

[0059]...

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Abstract

The invention discloses a making method of ultraviolet masking agent of sericite mica, which comprises the following steps: 1) preparing fined sericite mica; 2) activating the sericite mica powder; 3) adding water in the sericite mica to form the suspension with density at 2. 5-5%; adjusting the pH value to 2. 0-2. 5 through alcaine as system C; 4) allocating titanic chloride solution with density at 10-15%; adding zinc chloride in the titanic chloride solution; making the molar rate of Zn and Ti at 1: 2; obtaining the solution D; 5) dripping the solution D into the system D; controlling the pH value to 7. 0; 6) filtering the sediment; washing; drying at 95 deg. c; 7) grinding the drier; placing the drier in the electric furnace at 600 deg. c for 2-3h; 8) grinding the sintered material; beating to 10-15um; obtaining the product.

Description

technical field [0001] The invention relates to a preparation method of a sericite ultraviolet shielding agent, which belongs to the field of inorganic nanocomposite materials. Background technique [0002] A moderate amount of ultraviolet rays is beneficial to human health, but excessive ultraviolet rays may damage the eyes, accelerate skin aging, induce skin diseases and even cause cancer. Especially in recent years, with the sharp increase of global carbon dioxide emissions and the thinning of the ozone layer in the atmosphere, the intensity of ultraviolet rays reaching the ground is increasing, resulting in a significant increase in the number of patients with various solar skin diseases. In March 1995, an international seminar on UV protection was held in London. Worldwide, the protection of ultraviolet rays has attracted extensive attention from various countries, and has also caused extensive research and development of people's anti-ultraviolet products. [0003] U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/06C09K3/00
Inventor 严春杰韩利雄
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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