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Preparation method of novel nanocrystallized sericite powder

A sericite powder and nanotechnology, which is applied in the field of preparation of new nano-sericite powder, can solve the problems of whiteness, smoothness, insufficient skin-adhesiveness, and poor compatibility, and achieve suitable large-scale production and high whiteness. The effect of high degree and simple preparation process

Inactive Publication Date: 2019-02-01
滁州市开金绢云母有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a nano-modification treatment technology for the poor compatibility between traditional sericite and polymer materials and the lack of whiteness, lubricity and skin-adhesiveness used in high-end products. A novel nano-sericite powder; the nano-sericite powder prepared by the present invention has a high whiteness value (greater than 90), excellent lubricity and skin-adherence, and due to the small particle size and The large specific surface area can be well compounded with polymer materials, etc., the preparation process is simple, the raw materials are easy to obtain, and it is suitable for large-scale production

Method used

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  • Preparation method of novel nanocrystallized sericite powder
  • Preparation method of novel nanocrystallized sericite powder
  • Preparation method of novel nanocrystallized sericite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 20g of ultra-fine sericite powder prepared by wet method, add it to 30ml of deionized water and 60ml of simethicone mixed solution, stir and disperse at 50°C for 2h at high speed to form hydroxylated sericite powder for use.

[0029] Measure 10ml of hexamethyldisiloxane, add it to the mixed solution of 350ml of water and ethanol, stir and disperse evenly, then add 0.25g of octadecylaminotrimethylammonium chloride and continue stirring for 30min until the dispersion is even, add A certain amount of tartaric acid is used to adjust the pH of the reaction system to 5.5±0.5. Under this system, continue to stir rapidly for 10 hours, then add the above-mentioned hydroxylated sericite powder into it, and continue to disperse and stir at a high speed for 6 hours at 50°C. Subsequently, the coated sericite slurry is filtered, washed and dried to obtain nanometerized sericite powder.

Embodiment 2

[0031] Weigh 25g of ultra-fine sericite powder prepared by wet method, add it to 40ml of deionized water and 50ml of simethicone mixed solution, stir and disperse at 50°C for 2h at high speed to form hydroxylated sericite powder for use.

[0032] Measure 10ml of hexamethyldisiloxane, add it to the mixed solution of 350ml of water and ethanol, stir and disperse evenly, then add 0.25g of octadecylaminotrimethylammonium chloride and continue stirring for 30min until the dispersion is even, add A certain amount of tartaric acid is used to adjust the pH of the reaction system to 5.5±0.5. Under this system, continue to stir rapidly for 10 hours, then add the above-mentioned hydroxylated sericite powder into it, and continue to disperse and stir at a high speed for 6 hours at 50°C. Subsequently, the coated sericite slurry is filtered, washed and dried to obtain nanometerized sericite powder.

Embodiment 3

[0034] Weigh 20g of ultra-fine sericite powder prepared by wet method, add it to 30ml of deionized water and 60ml of simethicone mixed solution, stir and disperse at 50°C for 2h at high speed to form hydroxylated sericite powder for use.

[0035] Measure 10ml of hexamethyldisiloxane, add it to the mixed solution of 550ml of water and ethanol, stir and disperse evenly, then add 0.35g of octadecylaminotrimethylammonium chloride and continue stirring for 30min until the dispersion is even, add A certain amount of tartaric acid is used to adjust the pH of the reaction system to 5.5±0.5. Under this system, continue to stir rapidly for 10 hours, then add the above-mentioned hydroxylated sericite powder into it, and continue to disperse and stir at a high speed for 6 hours at 50°C. Subsequently, the coated sericite slurry is filtered, washed and dried to obtain nanometerized sericite powder.

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Abstract

The invention relates to a preparation method of a novel nanocrystallized sericite powder. The preparation method comprises the following steps: 1, preparing nanometer inorganic microspheres by a sol-gel technology; 2, activating ultrafine sericite powder; 3, adding the nanometer inorganic microspheres prepared in step 1 to an activated sericite slurry obtained in step 2, and performing dispersionat a temperature of 40-100 DEG C for 5-12 h until the sericite slurry is completely coated with the nanometer inorganic microspheres; and 4, filtering, washing and drying the coated nanometer sericite slurry to obtain the nanocrystallized sericite powder. The nanocrystallized sericite powder prepared in the invention has a high whiteness value (of above 90), excellent smooth feeling and an excellent skin fitting property, and can be well compounded with a polymeric material due to the small particle size and large specific surface area; and the preparation method has the advantages of simplepreparation process, easily available raw materials, and suitableness for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of mica powder, in particular to a preparation method of novel nano-sized sericite powder. Background technique [0002] Sericite is a natural fine-grained muscovite, which is a silicate with a 2:1 layered structure. It belongs to monoclinic crystal, the crystal is scaly, with silky luster. [0003] Sericite is a kind of inorganic non-metallic minerals, the chemical composition is K 0.5-1 (Al,Fe,Mg) 2 (SiAl) 4 o 10 (OH) 2 ·nH 2 O, the chemical composition is generally 48-55% of silicon dioxide, 28-36% of aluminum oxide, 6-10% of potassium oxide, 0.5-3% of iron oxide, and the completely cleaved sericite has a good sheet structure and high length. Diameter ratio (greater than 100), which makes it have excellent physical and chemical properties, such as high elastic modulus, acid and alkali corrosion resistance, ultraviolet and infrared radiation shielding, aging resistance, heat preservation and heat r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C3/06C09C3/08C09C3/04C09C3/12A61K8/26A61K8/25C08K3/34C08K9/10
CPCA61K8/25A61K8/26A61K2800/621C01P2004/03C08K3/34C08K9/10C09C1/405C09C3/006
Inventor 司开松金大伟宋为农
Owner 滁州市开金绢云母有限公司
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