Super-hydrophilic self-cleaning coating material composition and preparation method thereof, and super-hydrophilic self-cleaning glass and preparation method thereof

A self-cleaning, super-hydrophilic technology, applied in antifouling/underwater coatings, coatings, paints containing biocide, etc., can solve the problems of coating surface blooming, poor hydrophilic effect, complicated preparation, etc. Achieve low shrinkage, excellent superhydrophilicity, and high bond strength

Pending Publication Date: 2019-08-06
MATERIAL & IND TECH RES INST BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a self-cleaning glass surface coating in the prior art to overcome the problems of poor hydrophilic effect, poor light transmittance, "flo

Method used

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  • Super-hydrophilic self-cleaning coating material composition and preparation method thereof, and super-hydrophilic self-cleaning glass and preparation method thereof
  • Super-hydrophilic self-cleaning coating material composition and preparation method thereof, and super-hydrophilic self-cleaning glass and preparation method thereof
  • Super-hydrophilic self-cleaning coating material composition and preparation method thereof, and super-hydrophilic self-cleaning glass and preparation method thereof

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preparation example Construction

[0040] The present invention also provides a kind of preparation method of superhydrophilic self-cleaning coating composition, comprises the following steps:

[0041] (1) Preparation of modified nano-silica sol: under acidic conditions, water is added dropwise to the mixture of tetraethyl orthosilicate, alcohol and silane coupling agent to obtain modified nano-silica sol;

[0042] (2) Preparation of super-hydrophilic self-cleaning coating: the prepared modified nano-silica sol was mixed with anatase-type nano-titanium dioxide sol and water to obtain a super-hydrophilic self-cleaning coating.

[0043] According to the present invention, in step (1), based on the total weight of the modified nano-silica sol, the amount of tetraethyl orthosilicate is 15-25wt%, for example, can be 15wt%, 16wt% , 17wt%, 18wt%, 19wt%, 20wt%, 21wt%, 22wt%, 23wt%, 24wt%, 25wt% and any value in the range formed by any two of these point values; the amount of alcohol 50-60wt%, such as 50wt%, 51wt%, 52w...

Embodiment 1

[0070] 1. Preparation of modified nano-silica sol

[0071] Mix 40.00g TEOS, 130.00g absolute ethanol, and 8.49g silane coupling agent evenly, adjust the pH to 2-3 with hydrochloric acid, and add 59.81g deionized water dropwise at a rate of 0.1mL / s while stirring , and react at a constant temperature of 55° C. for 6 hours to obtain a uniform and transparent modified nano-silica sol.

[0072] 2. Preparation of superhydrophilic self-cleaning coating composition

[0073] Mix 25g of anatase-type nano-titanium dioxide sol with a mass fraction of 0.5% with the above-mentioned 1g of modified silica sol, and dilute with water to prepare a superhydrophilic nanometer self-cleaning coating.

[0074] 3. Testing the adhesion, microscopic morphology and photocatalytic degradation performance of superhydrophilic nano self-cleaning coating composition coating

[0075] (1) Coating adhesion test

[0076] The cross-hatch method was used to test the adhesion of the prepared superhydrophilic nan...

Embodiment 2

[0089] 1. Preparation of modified nano-silica sol

[0090] Mix 40.00g TEOS, 111.91g absolute ethanol, and 7.59g silane coupling agent evenly, adjust the pH to 2-3 with hydrochloric acid, and drop 53.45g deionized water at a rate of 0.1mL / s under stirring Add, and react at a constant temperature of 55° C. for 6 hours to prepare a uniform and transparent modified nano-silica sol.

[0091] 2. Preparation of superhydrophilic self-cleaning coating composition

[0092] Mix 15g of anatase-type nano-titanium dioxide sol with a mass fraction of 0.5% with the above-mentioned 1g of modified silica sol, and dilute with water to prepare a super-hydrophilic nanometer self-cleaning coating.

[0093] 3. Preparation of superhydrophilic self-cleaning glass

[0094] Use a dropper to absorb an appropriate amount of super-hydrophilic nano-self-cleaning coating sample and drop it on the edge of the high-density sponge, repeat it several times, so that the sample is fully infiltrated on the edge o...

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Abstract

The invention relates to the field of self-cleaning glass, and discloses a super-hydrophilic self-cleaning coating material composition and a preparation method thereof, and a super-hydrophilic self-cleaning glass and a preparation method thereof. The super-hydrophilic self-cleaning coating material composition comprises a modified nanometer silica sol, an anatase type nanometer titanium dioxide sol and water, and based on the total amount of the solid-state sol, the mole fraction of the modified nanometer silica sol is 40-70%, and the mole fraction of the anatase type nanometer titanium dioxide sol is 30-60%. The structure of the super-hydrophilic self-cleaning glass sequentially comprises a coating formed by the super-hydrophilic self-cleaning coating material composition, and a glass plate from top to bottom. The present invention further provides a super-hydrophilic self-cleaning coating material composition and a preparation method thereof, and a super-hydrophilic self-cleaning glass and a preparation method thereof. According to the present invention, the super-hydrophilic self-cleaning coating material composition has characteristics of excellent super-hydrophilic property,excellent photocatalytic degradation property, reflection reducing, weathering resistance and good self-cleaning performance, the coating process is simple to construct and operate, and the large-areaconstruction application in multiple fields can be achieved.

Description

technical field [0001] The invention relates to the field of self-cleaning glass, in particular to a superhydrophilic self-cleaning coating composition, a superhydrophilic self-cleaning coating, a superhydrophilic self-cleaning glass and a preparation method thereof. Background technique [0002] The development of self-cleaning glass is mainly by coating a layer of coating with self-cleaning performance and certain anti-reflection effect on the glass surface. Since the discovery of TiO by Fujishima and Honda 2 For more than 40 years, the phenomenon that electrodes can photo-split water to generate hydrogen has been studied by people. 2 Applications in solar energy conversion and environmental cleaning have been extensively studied. In numerous TiO 2 One of the most interesting and attractive studies on the application of TiO 2 Research on self-cleaning surfaces, which can use sunlight and natural rainfall to keep themselves clean, thereby saving maintenance time, costs ...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/16C03C17/25
CPCC09D1/00C09D5/1656C03C17/006C03C17/256C03C2217/23C03C2218/114C03C2218/112
Inventor 凡雪迎智云霞张林姜春华
Owner MATERIAL & IND TECH RES INST BEIJING
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