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Fluorination modified organosilicon nano coating and preparation method thereof

A nano-coating and organosilicon technology, which is applied in coatings and other directions, can solve the problems of high price of fluorine-modified alkylsilanes, and achieve good high and low temperature resistance, cost reduction, and good stability.

Active Publication Date: 2007-02-07
GUANGZHOU BAIYUN CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of fluorine-modified alkylsilanes, the research in the field of fluorine-modified silicones is mostly at the theoretical level, and there is still a certain gap from large-scale applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of the fluorinated modified silicone nano-coating of this embodiment comprises the following two steps:

[0027] 1) Prepare silica nanoparticles by seed crystal growth technique.

[0028]100 parts of ethanol was placed in the reactor as a solvent and stirred, and 4 parts of water were added. Then add concentrated ammonia water to adjust the pH value of the system to 10. At a reaction temperature of 40°C, 3 parts of ethyl orthosilicate was added into the reactor, and the hydrolysis reaction was carried out for 3 hours. Then add 2.5 parts of ethyl orthosilicate, continue to stir and hydrolyze for 3 hours, and obtain silica nanoparticles.

[0029] 2) Surface modification of silica nanoparticles.

[0030] Adjust the pH value of the above silica reaction system to 8.0 with dilute hydrochloric acid, add 0.4 parts of methyltriethoxysilane and 0.35 parts of tridecafluorooctyltrimethoxysilane, and continue the reaction at 36 ° C for 4 hours to obtain sh...

Embodiment 2

[0033] The preparation method of the fluorinated modified silicone nano-coating of this embodiment comprises the following two steps:

[0034] 1) Prepare silica nanoparticles by seed crystal growth technique.

[0035] Put 100 parts of ethanol as a solvent in the reactor and stir, add 3 parts of water, and then add tetramethylammonium hydroxide to adjust the pH of the system to 11.5. At a reaction temperature of 38°C, 3 parts of ethyl orthosilicate was added into the reactor, and the reaction was stirred for 2.5 hours. Then add 2 parts of ethyl orthosilicate, and continue to stir and hydrolyze for 2 hours to obtain silica nanoparticles.

[0036] 2) Surface modification of silica nanoparticles.

[0037] Use dilute hydrochloric acid to adjust the pH value of the above silica reaction system to 8.0, add 0.4 parts of methyltrimethoxysilane and 0.5 parts of trifluoropropyltrimethoxysilane, and continue stirring at a reaction temperature of 40°C for 6 hours to obtain shallow blue ...

Embodiment 3

[0040] The preparation method of the fluorinated modified silicone nano-coating of this embodiment comprises the following two steps:

[0041] 1) Prepare silica nanoparticles by seed crystal growth technique.

[0042] Put 100 parts of ethanol as a solvent in the reactor and stir, add 5 parts of water, and adjust the pH value of the system to 2.5 with dilute hydrochloric acid. At a reaction temperature of 45°C, 3.5 parts of ethyl orthosilicate was first added into the reactor, and the reaction was stirred for 2.5 hours. Then add 2 parts of ethyl orthosilicate, continue to stir and hydrolyze for 3 hours, and obtain silica nanoparticles.

[0043] 2) Surface modification of silica nanoparticles.

[0044] The pH value of the above silica reaction system was adjusted to 6.0 with hexamethyldisilazane, and 0.5 part of methyltriethoxysilane and 0.5 part of nonafluorohexyltrimethoxysilane were added. Stirring was continued at 48°C for 12 hours to obtain a colorless and transparent so...

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Abstract

the invention discloses a fluoride modified organic silicon nanometer paint, which consists of solvent and active component, wherein the active component is fluoride modified organic silicon nanometer particle, whose reacting raw material contains silicate ester, alkyl silane and fluoride modified alkyl silane according to 8-20: 0.5-1.5: 1. the preparing method comprises the following steps: first, preparing silica nanometer particle through hydrolyzing silicate ester; second, proceeding surface modifying through silica nanometer particle to prepare the product.

Description

technical field [0001] The invention relates to a fluorinated modified organosilicon nano-coating used for surface treatment of glass, ceramics, etc. to make the surface have dustproof, antifouling and self-cleaning functions and a preparation method thereof. Background technique [0002] With the development of the global economy, the consumption of glass and ceramic products in the construction and transportation industries has increased rapidly, such as glass curtain walls of high-rise buildings, glass windows of residential buildings, sanitary ware, ceramic tiles and automobile windshields. Because the surface of glass and ceramics is easy to absorb and stick dust, the cleaning of glass and ceramics has become a troublesome cleaning problem. It is not only time-consuming and laborious, but also dirty soon after cleaning. Therefore, the technology of modifying the surface of glass and ceramics, breaking through the traditional cleaning method, and making the surface have ...

Claims

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Application Information

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IPC IPC(8): C09D183/00C03C25/10C04B41/49
Inventor 郭庆中黄恒超伍青诸泉欧阳喜仁
Owner GUANGZHOU BAIYUN CHEM IND
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