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A kind of nanometer zinc oxide surface modification and the preparation method of reverse phase dispersion slurry

A nano-zinc oxide and surface modification technology, which is applied in the direction of zinc oxide/zinc hydroxide, medical preparations containing active ingredients, cosmetic preparations, etc., can solve the problem of damaging the stability of the application system, reducing application efficiency, and limiting the scope of application and other problems, to achieve the effect of improving UV shielding performance, easy operation and simple process

Active Publication Date: 2022-06-28
常州纳欧新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strong photocatalytic ability of ZnO leads to the oxidative decomposition of the matrix; the high specific surface energy causes particle agglomeration; as an amphoteric oxide, the dissolution and precipitation of zinc ions will more or less occur in strong alkali and acidic media , which will not only reduce its own application performance but also destroy the stability of the application system, severely limiting its application range

Method used

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  • A kind of nanometer zinc oxide surface modification and the preparation method of reverse phase dispersion slurry
  • A kind of nanometer zinc oxide surface modification and the preparation method of reverse phase dispersion slurry
  • A kind of nanometer zinc oxide surface modification and the preparation method of reverse phase dispersion slurry

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Embodiment 1

[0028] A surface modification method of nano-zinc oxide, comprising the following steps:

[0029] (1) take by weighing the nano zinc oxide of 100g and 400g distilled water and put it into the sand grinding barrel, add 0.1M dilute hydrochloric acid dropwise under the stirring state, adjust the pH of the solution to be 4-5, after the dispersion disc is evenly dispersed, use the grinding wheel at the rotating speed of Grinding at 4000r / min for 1h to obtain a mixed solution of nano-zinc oxide;

[0030] (2) the mixed solution of above-mentioned nano zinc oxide is moved to the reactor, the temperature is raised to 85 ℃, the mixed solution of 4%wt stearic acid and absolute ethanol is added dropwise, the pH of the adjustment reaction system is 6-7, and stirred for 1h; Maintain the reaction temperature, continue to add dropwise (bisaminosilane coupling agent) a mixed solution of 2%wt N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane and absolute ethanol, stir for 1h; Filtration and washi...

Embodiment 2

[0034] A surface modification method of nano-zinc oxide, comprising the following steps:

[0035] (1) take by weighing the nano zinc oxide of 50g and 450g distilled water and put it into the sand grinding barrel, add 0.01M dilute hydrochloric acid dropwise under the stirring state, adjust the pH of the solution to be 4-5, after the dispersion disc is uniformly dispersed, use the grinding wheel at the rotating speed of Grinding at 3000r / min for 2h to obtain a mixed solution of nano-zinc oxide;

[0036] (2) The mixed solution of the above-mentioned nano-zinc oxide is moved to the reaction kettle, and the temperature is raised to 55 ° C, and the mixed solution of 2%wt stearic acid and isopropanol is added dropwise, and the pH of the adjustment reaction system is 6-7, and stirred for 2h; Maintain the reaction temperature, continue to add dropwise (monoaminosilane coupling agent) a 1%wt mixed solution of 3-aminopropyltriethoxysilane and isopropanol, stir for 2h; filter and wash wit...

Embodiment 3

[0040] A surface modification method of nano-zinc oxide, comprising the following steps:

[0041] (1) take by weighing the nano zinc oxide of 150g and 350g distilled water and put it into the sand grinding barrel, add 0.3M dilute hydrochloric acid dropwise under the stirring state, adjust the pH of the solution to be 4-5, after the dispersion disc is uniformly dispersed, use the grinding wheel at the rotating speed of Grinding at 5000r / min for 0.5h to obtain a mixed solution of nano-zinc oxide;

[0042] (2) The mixed solution of the above-mentioned nano-zinc oxide was moved to the reaction kettle, the temperature was raised to 90 ° C, the mixed solution of 8%wt stearic acid and methanol was added dropwise, the pH of the reaction system was adjusted to be 6-7, and stirred for 0.5 h; At the reaction temperature, continue to add dropwise (polyaminosilane coupling agent) a 3%wt mixed solution of γ-aminoethylaminoethylaminopropyltrimethoxysilane and methanol, and stir for 0.5h; fil...

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Abstract

The invention belongs to the field of inorganic nanometer material and fine chemical industry, and relates to a preparation method of nanometer zinc oxide surface modification and reverse phase dispersion slurry. The present invention weighs nano-zinc oxide and dilute hydrochloric acid and grinds it to obtain a mixed solution of nano-zinc oxide, then moves it to the reaction kettle, heats up, adds the mixed solution of stearic acid and organic alcohol dropwise, and continues to add the silane coupling agent dropwise after stirring. Organic alcohol mixed solution to obtain filter cake of modified nanometer zinc oxide composite material. The modified nano-zinc oxide filter cake and dispersant are added into the sand mill barrel, dispersed and ground to obtain nano-zinc oxide reversed-phase dispersion slurry. In the present invention, while a part of zinc oxide is generated into zinc stearate to form a dinuclear coordination structure, the exposed hydroxyl group on the surface of zinc oxide is used to chemically react with the hydrophilic group amino group in the silane coupling agent to change the nano-zinc oxide powder. Hydrophobic and improves the stability and UV shielding properties of nanoparticles.

Description

technical field [0001] The invention belongs to the field of inorganic nanometer materials and fine chemical industry, and relates to a preparation method of nano-zinc oxide surface modification and a preparation method of reverse phase dispersion slurry. Background technique [0002] Nano-ZnO has excellent shielding properties for long-wave dark spot effect ultraviolet (UVA) and is widely used in the field of sunscreen cosmetics. However, the strong photocatalytic ability of ZnO leads to the oxidative decomposition of the matrix; the higher specific surface energy causes particle agglomeration; as an amphoteric oxide, the dissolution and precipitation of zinc ions will occur more or less in strong alkali and acidic media. , which will not only reduce its own application performance but also destroy the stability of the application system, which seriously limits its application range. In order to reduce the attraction between nanoparticles, increase the surface repulsion be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/27A61K8/58A61K8/36A61K8/28A61K8/81A61Q17/04C01G9/02
CPCA61K8/27A61K8/585A61K8/361A61K8/28A61K8/8147A61Q17/04C01G9/02A61K2800/413
Inventor 姚超倪璟怡左士祥严向玉李霞章刘文杰吴凤芹王灿
Owner 常州纳欧新材料科技有限公司
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