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Method for preparing styrene grafted silicon dioxide superhydrophobic thin film

A technology of silica and silica balls, applied in the direction of silica, silica, etc., can solve the problems of difficult preparation of porous templates, complex equipment, and limited practical application range, etc., to achieve excellent superhydrophobic and self-cleaning properties, Improve the bonding strength of the interface and facilitate the promotion and use of the effect

Inactive Publication Date: 2011-08-03
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods have great limitations. The equipment used is complex, expensive, and the preparation conditions are harsh, and it is impossible to process special-shaped surfaces or large-area surfaces. For example, the porous template required by the template method is not easy to prepare: the electrospinning method is not suitable for outdoor operations; The low surface energy substances used (such as perfluorosiloxane) are very expensive and the production cost is high
The above reasons limit the scope of practical application

Method used

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  • Method for preparing styrene grafted silicon dioxide superhydrophobic thin film
  • Method for preparing styrene grafted silicon dioxide superhydrophobic thin film
  • Method for preparing styrene grafted silicon dioxide superhydrophobic thin film

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Preparation of silica spheres:

[0025] Add 15g of ammonia water to 150g of absolute ethanol, stir for 20 minutes to make it evenly mixed. Using a constant pressure separatory funnel, slowly add 10 g of tetraethyl orthosilicate dropwise, at 30°C, magnetically stir the reaction for 10 hours, wash with alcohol and centrifuge three times, and finally dry at 110°C for two hours, and grind into powder to obtain nano-silica ball.

[0026] Preparation of vinyl-modified silica nanospheres:

[0027] Weigh 1 g of the above-prepared silica nanospheres and place them in 80 g of absolute ethanol solution. After dispersing and stirring for 10 minutes, quickly add 9 g of vinyltriethoxysilane, 8 g of ammonia water, and react for 10 hours at 30 ° C. Wash and centrifuge three times, and finally dry at 110° C. for two hours, and grind into powder to obtain vinyl-modified silica nanospheres.

[0028] Styrene grafted nano silica balls:

[0029] Place 1 g of the above-prepared vinyl-modi...

Embodiment 2

[0034] Preparation of silica spheres:

[0035] Add 10g of ammonia water to 100g of methanol, stir to make it evenly mixed. Using a constant pressure separatory funnel, slowly add 10 g of tetraethyl orthosilicate dropwise, at 25°C, magnetically stir for 8 hours, wash with alcohol and centrifuge three times, finally dry at 110°C for two hours, and grind into powder.

[0036] Preparation of vinyl-modified silica nanospheres:

[0037] Weigh 1 g of the above-prepared silica nanospheres and place them in 80 g of absolute ethanol solution, disperse and stir for 10 minutes, then quickly add 12 g of 3-(methacryloyloxy)propyltrimethoxysilane, 8 g of ammonia water, and react at 25°C 8 hours, washed with alcohol and centrifuged three times, and finally dried at 110°C for two hours, and ground into powder.

[0038] Styrene grafted nano silica balls:

[0039]Place 1 g of the above-prepared vinyl-modified silica nanospheres in 30 g of xylene organic solvent, add 0.3 g of dibenzoyl peroxid...

Embodiment 3

[0041] Preparation of silica spheres:

[0042] Add 20g of ammonia water to 130g of absolute ethanol, stir to make it evenly mixed. Using a constant pressure separatory funnel, slowly add 10 g of tetraethyl orthosilicate dropwise, at 35°C, magnetically stir the reaction for 12 hours, wash with alcohol and centrifuge three times, finally dry at 110°C for two hours, and grind into powder.

[0043] Preparation of vinyl-modified silica nanospheres:

[0044] Weigh 1 g of the above-prepared silica nanospheres and place them in 80 g of absolute ethanol solution. After dispersing and stirring for 10 minutes, quickly add 10 g of vinyltriethoxysilane and 8 g of ammonia water, react at 35°C for 12 hours, and wash with alcohol. Centrifuge three times, dry at 110°C for two hours, and grind into powder.

[0045] Styrene grafted nano silica balls:

[0046] Place 1 g of the vinyl-modified silica nanospheres prepared above in 20 g of cyclohexanone organic solvent, add 0.2 g of initiator azob...

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Abstract

The invention discloses a method for preparing a styrene grafted silicon dioxide superhydrophobic thin film, which comprises: firstly, adding tetraethoxysilane into mixed solution of a catalyst and an alcohol solvent to obtain nano silicon dioxide spheres by reaction; secondly, adding the nano silicon oxide spheres into the alcohol solvent, and adding a silane coupling agent and the catalyst to obtain vinyl modified nano silicon oxide spheres; and finally, adding the vinyl modified nano silicon oxide spheres into a benzene or ketone organic solvent, adding an initiator and a styrene monomer in turn to obtain the styrene grafted silicon dioxide spheres, dispersing the styrene grafted silicon dioxide under ultrasonic waves, and preparing the styrene grafted silicon dioxide by using an organic or inorganic material as a substrate and by a coating method. The preparation process is simple and high in repeatability, the cost is low, and the promotion is more convenient.

Description

technical field [0001] The invention relates to the technical field of application of organic-inorganic composite materials, in particular to a method for preparing an organic-inorganic nano-composite superhydrophobic film. Background technique [0002] Since the advent of organic / inorganic nanocomposites, it has attracted more and more attention for its unique structure and performance. Organic-inorganic composites combine the characteristics of organic materials (good toughness, impact resistance, light weight, easy processing, etc.) ) and the advantages of inorganic materials (high strength, hardness, thermal stability, corrosion resistance and excellent optical properties). As an extremely attractive material in the 21st century, organic-inorganic nanocomposites have shown important research value and application prospects in the fields of automobiles, building materials, aerospace, aviation, energy, environmental protection, and biomedicine. [0003] Wettability is one...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L51/10C08F292/00C01B33/18
Inventor 刘伟良孙晓玲范志平
Owner QILU UNIV OF TECH
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