Super-hydrophilic, self-cleaning and antifogging coating and preparation method thereof

An anti-fog coating, self-cleaning technology, applied in coatings, polyurea/polyurethane coatings, alkali metal silicate coatings, etc., can solve the self-cleaning, anti-fogging effect and durability or preparation of super-hydrophilic coatings Problems such as unsatisfactory conditions, harsh preparation conditions, and limited application scope have achieved the effect of overcoming the harsh preparation conditions

Active Publication Date: 2017-10-03
广州一新科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, super-hydrophilic coatings are mostly realized by introducing nanoparticles such as titanium dioxide or hydrophilic silica, alumina, etc.: super-hydrophilic coatings based on titanium dioxide need to be able to achieve super-hydrophilicity of the surface under the condition of ultraviolet light irradiation phenomenon, its long-term effect cannot be guaranteed indoors or in a dark environment, which limits its application range; most superhydrophilic coatings i

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  • Super-hydrophilic, self-cleaning and antifogging coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] The super-hydrophilic self-cleaning anti-fog coating of the present embodiment 1 is prepared by the following method, and the steps are as follows:

[0025] (1) Add 12ml tetraethyl orthosilicate to a three-necked flask, add 400ml ethanol and 30ml 25% ammonia solution under stirring, react at 60°C for 8h to obtain silica particles with a particle size of 80nm, and then Add 3-aminopropyltrimethoxysilane whose mass is 1 / 3 of the tetraethyl orthosilicate, and react at 50°C for 6 hours under stirring, so that the surface of the silica particles is grafted with a sufficient amount of 3-aminopropyl Trialkoxysilane, centrifuged and ultrasonically washed to obtain aminosilane-modified nanoparticles;

[0026] (2) Add the 10 g of aminosilane-modified nanoparticles in 50 ml of absolute ethanol, and after the ultrasonic dispersion is uniform, slowly add 50 g of AkzoNobel’s silica sol Levasil CC151 (solid content 15%, 5 nm) dropwise under stirring, After reacting for 24 hours, a sta...

Embodiment 2

[0029] The superhydrophilic self-cleaning anti-fog coating of the present embodiment 2 is prepared by the following method, and the steps are as follows:

[0030] (1) Add 12ml of tetraethyl orthosilicate to a three-necked flask, add 400ml of ethanol and 30ml of 25% ammonia solution under stirring and react at 60°C for 10h to obtain silica particles with a particle size of 100nm, and then add 3-aminopropyltrimethoxysilane whose mass is 1 / 2 of the tetraethyl orthosilicate, reacted at 50°C for 6 hours under stirring, so that the surface of the silica particles was grafted with a sufficient amount of 3-aminopropyltrimethoxysilane Oxysilane, centrifuged, and ultrasonically washed to obtain aminosilane-modified nanoparticles;

[0031] (2) Add the 10g of aminosilane-modified nanoparticles in 50ml of absolute ethanol, and after the ultrasonic dispersion is uniform, slowly add 30g of Akzo Nobel's Levasil CC301 (solid content 28%, 7nm) dropwise under stirring state, add the Adjust the ...

Embodiment 3

[0034] The superhydrophilic self-cleaning anti-fog coating of present embodiment 3 is prepared by the following method, and its steps are as follows:

[0035](1) Add 12ml of tetraethyl orthosilicate to a three-necked flask, add 400ml of ethanol and 30ml of 25% ammonia solution under stirring and react at 60°C for 10h to obtain silica particles with a particle size of 100nm, and then add 3-aminopropyltrimethoxysilane whose mass is 1 / 2 of the tetraethyl orthosilicate, reacted at 50°C for 6 hours under stirring, so that the surface of the silica particles was grafted with a sufficient amount of 3-aminopropyltrimethoxysilane Oxysilane, centrifuged, and ultrasonically washed to obtain aminosilane-modified nanoparticles;

[0036] (2) Add the 10g of aminosilane-modified nanoparticles in 50ml of absolute ethanol, after the ultrasonic dispersion is uniform, slowly add 20g of AkzoNobel's Levasil CC401 (solid content 37%, 12nm) dropwise under stirring state, add Adjust the solid content...

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Abstract

The invention discloses a super-hydrophilic, self-cleaning and antifogging coating. The coating comprises a bonding layer, and hydrophilic composite nanoparticles with rough surfaces, wherein one surface of the bonding layer is bonded with the hydrophilic composite nanoparticles, and the other surface of the bonding layer is connected with a base material; and the hydrophilic composite nanoparticles are prepared from amino silane modified silicon dioxide nanoparticles and epoxy silane modified silicon dioxide nanoparticles by ring-opening reaction bonding of amino and epoxy. According to the super-hydrophilic, self-cleaning and antifogging coating, the hydrophilic composite nanoparticles with the rough surfaces are adopted and prepared from two silicon dioxide nanoparticles by chemical bond combination; and in addition, a hydrophilic polymer which can be bonded with the hydrophilic composite nanoparticles is used as a filming bonding agent for realizing the force bonding of the base material and the rough hydrophilic composite nanoparticles, thus the high-temperature sintering treatment is avoided, and the technical problem of severe condition of the preparation of an existing super-hydrophilic coating can be effectively overcome.

Description

technical field [0001] The invention relates to the field of new chemical materials, in particular to a superhydrophilic self-cleaning anti-fog coating and a preparation method thereof. Background technique [0002] The concept of "self-cleaning" began in the 1990s. Self-cleaning is divided into superhydrophobic and superhydrophilic according to its principle. Superhydrophobic coatings are coatings with a water contact angle > 150° and a rolling angle < 10°. , its self-cleaning principle mainly realizes the self-cleaning effect through the rolling of surface water droplets to take away surface pollutants; the super-hydrophilic coating has a water contact angle of <5°, which is finally achieved by forming a water film on the surface to take away surface pollutants Self-cleaning effect. [0003] Fogging refers to the phenomenon that moisture or steam condenses on the surface of the product to form tiny water droplets. The fogging of transparent or imaging products wi...

Claims

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Application Information

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IPC IPC(8): C09D1/02C09D1/00C09D175/04C09D133/00C09D7/12
CPCC09D1/00C09D1/02C09D133/00C09D175/04
Inventor 伍淼王靖王俊杰
Owner 广州一新科技有限公司
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