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Mono-component polymeric nanocomposite superhydrophobic coating material and preparation method therefor

A super-hydrophobic coating and nano-composite technology, applied in the direction of coating, etc., can solve the problems of poor durability, weak effect, decreased hydrophobic performance of materials, etc., and achieve the effect of increasing the application range and good adhesion ability.

Active Publication Date: 2019-08-20
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still shortcomings in this method. Due to the physical adsorption between the hydrophobic spherical silica and the polystyrene film, and the intermolecular force is weaker than the chemical bond, the hydrophobic spherical silica is easy to remove from the polystyrene film. The surface falls off, which greatly reduces the hydrophobicity of the material, resulting in poor durability and short service life
[0006] In the literature including Chinese patents, spherical silica containing halogen groups and small hydrophobic groups on the surface has not been prepared first, and then the single-component polymer nanocomposite superhydrophobic coating material is prepared by atom transfer radical polymerization. Reports on Hydrophobic Coatings for Substrates

Method used

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  • Mono-component polymeric nanocomposite superhydrophobic coating material and preparation method therefor
  • Mono-component polymeric nanocomposite superhydrophobic coating material and preparation method therefor
  • Mono-component polymeric nanocomposite superhydrophobic coating material and preparation method therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0079] Mix 400mL of absolute ethanol and 80mL of ammonium hydroxide into a 1L round-bottomed flask, stir mechanically for 1h, add 2mL of ethyl orthosilicate under the condition of heating in a water bath at 30°C, stir for 24h, and then add 4mL of ethyl orthosilicate Add the ester dropwise to the flask, and stir at 30°C for 24 hours to obtain a spherical nano-silica sol; transfer 100 mL of the spherical nano-silica sol to a 250 mL round-bottomed flask, and add 70 μL of octadecyltrimethoxy After stirring the mixture of base silane and 10 μL of γ-aminopropyltriethoxysilane under the condition of heating in a water bath at 40°C for 24 hours, it was purified by centrifugation and dried to obtain powdery hydrophobic spherical silica.

[0080] Dissolve the dried powdered hydrophobic spherical silica in 20mL N-N dimethylformamide, sonicate for 12h, add 1.5mL triethylamine and 1mL 2-bromoisobutyryl bromide dropwise, and mechanically stir in an ice-water bath After 48 hours, it was cent...

Embodiment 2

[0094] Mix 500mL of absolute ethanol and 100mL of ammonium hydroxide into a 1L round-bottomed flask, stir mechanically for 1h, add 2mL of ethyl orthosilicate under the condition of heating in a water bath at 30°C, stir for 24h, and then add 8mL of ethyl orthosilicate The ester was added dropwise to the flask, and after stirring for 24 hours, a spherical nano-silica sol was formed; 100 mL of the spherical nano-silica sol was transferred to a 250 mL round-bottomed flask, and 105 μL of octadecyltrimethoxysilane and 15 μL of the mixed product of γ-aminopropyltriethoxysilane was stirred for 24 hours under the condition of heating in a water bath at 40° C., purified by centrifugation and dried to obtain powdery hydrophobic spherical silica.

[0095] Dissolve the dried powdered hydrophobic spherical silica in 20mL N-N dimethylformamide, sonicate for 12h, add 1.5mL triethylamine and 1mL 2-bromoisobutyryl bromide dropwise, and stir in an ice-water bath for 48h After centrifugal purific...

Embodiment 3

[0099] Mix 600mL of absolute ethanol and 120mL of ammonium hydroxide into a 1L round bottom flask, stir mechanically for 1h, add 2mL of ethyl orthosilicate under the condition of heating in a water bath at 30°C, stir for 24h, and then add 18mL of ethyl orthosilicate Add the ester dropwise to the flask, and form a nano-silica sol after mechanical stirring for 24 hours; transfer 100 mL of the nano-silica sol to a 250 mL round-bottomed flask, and add 140 μL octadecyltrimethoxysilane dropwise to it After mixing with 20 μL of γ-aminopropyltriethoxysilane, mechanically stirring for 24 hours under the condition of heating in a water bath at 40° C., centrifugally purifying and drying to obtain powdery hydrophobic spherical silica.

[0100] Dissolve the dried powdered hydrophobic spherical silica in 20mL N-N dimethylformamide, sonicate for 12h, add 1.5mL triethylamine and 1mL 2-bromoisobutyryl bromide dropwise, and mechanically stir in an ice-water bath After 48 hours, it was purified ...

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Abstract

The invention discloses a mono-component polymeric nanocomposite superhydrophobic coating material and a preparation method therefor. The method mainly comprises the following steps: uniformly mixingspherical silicon dioxide sol with gamma-aminopropyl triethoxysilane and octadecyl methoxy silane, and then, carrying out purifying and drying, so as to obtain hydrophobic spherical silicon dioxide; then, adding and dissolving the hydrophobic spherical silicon dioxide in N-N dimethylformamide, then, sequentially adding triethylamine and a halogenation reagent, and carrying out uniform mixing, so as to prepare hydrophobic spherical silicon dioxide, of which the surface contains halogen groups; and then, preparing a hydrophobic-modified spherical silicon dioxide particle brush from the hydrophobic spherical silicon dioxide, of which the surface contains the halogen groups, by an atom transfer free-radical polymerization method, thereby preparing the mono-component polymeric nanocomposite superhydrophobic coating material. The superhydrophobic coating material prepared by the method not only has superhydrophobic and self-film-forming properties, but also is high in substrate bonding power, good in durability and long in service life.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and in particular relates to a single-component polymer nanocomposite superhydrophobic coating material and a preparation method thereof. Background technique [0002] The study of the lotus leaf effect and the theory of wetting has led to the study of bionic superhydrophobic surfaces. Superhydrophobic materials have the characteristics of self-cleaning and stain resistance, so they have broad application prospects in the fields of aerospace military industry, agriculture, pipeline non-destructive transportation, housing construction, and waterproofing and anti-icing of equipment working in various open-air environments. Superhydrophobic material particles have become a hot topic in the research of hydrophobic self-cleaning materials because of their good hydrophobicity and certain self-cleaning properties. [0003] The wettability of a solid surface is mainly determined by the chemical c...

Claims

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Application Information

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IPC IPC(8): C09D151/10C08F292/00C08F212/08C08F220/44C08F226/10
CPCC08F292/00C09D151/10C08F212/08C08F220/44C08F226/10
Inventor 张建安李小飞吴明元吴庆云杨建军刘久逸
Owner ANHUI UNIVERSITY
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