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A kind of haze-reducing coating for building wall and preparation method thereof

A coating and building technology, which is applied in the field of haze-reducing coatings for building walls and its preparation, can solve problems such as unsatisfactory haze-removing effects, and achieve significant practical application prospects, high specific surface area, and the effects of improving air quality.

Active Publication Date: 2021-07-02
中烯新材料(福建)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem that the current wall coatings are difficult to remove haze in a large area and the haze removal effect is not ideal, the present invention provides a haze-reducing paint for building walls and a preparation method, which can effectively prevent the outward loss of catalytic active substances, and has high adsorption capacity And visible light drives photocatalytic degradation of organic pollutants, improves air quality, and has a significant effect on the prevention and control of large areas of smog

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Mix zinc acetate dihydrate and diethylene glycol in proportion, add tourmaline nanoparticles with a particle size of 740nm and sonicate for 20 minutes, and the weight ratio of zinc acetate dihydrate, diethylene glycol, and tourmaline nanoparticles is 0.035:1 :5, after zinc acetate dihydrate is completely dissolved, continue to stir, heat to 160°C, age at a constant temperature for 1h, stop heating, centrifuge after natural cooling, and wash repeatedly with absolute ethanol to obtain tourmaline-loaded zinc oxide nanocrystals, oxidized The loading of zinc nanocrystals is 21%, and then dried in an oven at 80°C;

[0032] (2) In the solution concentration of 80g / L sodium bicarbonate solution, the drop rate is 0.25 mL·min -1 Slowly add a sodium metaaluminate solution with a solution concentration of 120g / L, fully stir at 25°C to react, collect the formed precipitate and wash it with deionized water to obtain an aluminum hydroxide filter cake; then mix the aluminum hydroxi...

Embodiment 2

[0036] (1) Mix zinc acetate dihydrate and diethylene glycol in proportion, add tourmaline nanoparticles with a particle size of 120nm and sonicate for 20 minutes, and the weight ratio of zinc acetate dihydrate, diethylene glycol, and tourmaline nanoparticles is 0.032:1 : 6. After zinc acetate dihydrate is completely dissolved, continue to stir, heat to 155° C., age at a constant temperature for 1 hour, stop heating, centrifuge after natural cooling, and repeatedly wash with absolute ethanol to obtain tourmaline-loaded zinc oxide nanocrystals, oxidized The loading of zinc nanocrystals is 23%, and then dried in an oven at 80°C;

[0037] (2) In the solution concentration of 60-100g / L sodium bicarbonate solution, the drop rate is 0.45mL·min -1 Slowly add a sodium metaaluminate solution with a solution concentration of 130g / L, fully stir the reaction at 25°C, collect the formed precipitate and wash it with deionized water to obtain an aluminum hydroxide filter cake; then add the al...

Embodiment 3

[0041] (1) Mix zinc acetate dihydrate and diethylene glycol in proportion, add tourmaline nanoparticles with a particle size of 500nm and sonicate for 20 minutes, and the weight ratio of zinc acetate dihydrate, diethylene glycol, and tourmaline nanoparticles is 0.01:1 :3. After the zinc acetate dihydrate is completely dissolved, continue to stir, heat to 156°C, age at a constant temperature for 1 hour, stop heating, centrifuge after natural cooling, and wash repeatedly with absolute ethanol to obtain tourmaline-loaded zinc oxide nanocrystals, oxidized The loading of zinc nanocrystals was 16%, and then dried in an oven at 80 °C;

[0042] (2) In the solution concentration of 60-100g / L sodium bicarbonate solution, the drop rate is 0.24mL·min -1 Slowly add a sodium metaaluminate solution with a solution concentration of 143g / L, fully stir at 25°C for the reaction, collect the formed precipitate and wash it with deionized water to obtain an aluminum hydroxide filter cake; then add ...

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PUM

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Abstract

The present invention proposes a haze-reducing coating for building walls and a preparation method thereof. Firstly, pseudoboehmite sol-coated tourmaline-supported zinc oxide nanocrystalline composite spherical fine particles are prepared as photocatalysts, and then combined with nano-silica, nano- Wollastonite, ultra-fine talcum powder, defoamer, dispersant, film-forming aid, preservative, and water are used to make a slurry, and finally combined with silicone acrylic resin and thickener to form a haze-reducing coating for building walls. The present invention uses the pseudo-boehmite sol with the characteristics of high specific surface area and large pore volume to coat the tourmaline-loaded zinc oxide nanocrystalline composite material, so as to avoid the outward loss of catalytic active substances, and it is also an adsorbent with excellent performance. After the combination of zinc nanocrystals, its high adsorption capacity and visible light-driven photocatalytic degradation of cationic organic pollutants can improve air quality and have a significant effect on the prevention and control of large areas of haze; further, the preparation process of the coating is simple and the cost of raw materials is low , suitable for large-scale promotion.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a haze-reducing coating for building walls and a preparation method thereof. Background technique [0002] With the continuous growth of my country's national economy and the continuous improvement of people's living standards, environmental protection has become a main theme for people to pursue a healthy and green life. As people have higher and higher requirements for coatings for indoor and outdoor decoration, more and more people focus on anti-smog and environmental protection coatings in the process of choosing functional coatings. Forest-like fresh air", therefore, it is of great significance to research and develop coatings with anti-smog effect. [0003] In recent years, smog pollution and indoor air quality problems have become increasingly serious. After the fine particulate matter PM2.5 in the smog enters the human body to the alveoli, it directly affects the ventil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/04C09J11/04E04F13/04
CPCY02A50/20
Inventor 陈庆昝航
Owner 中烯新材料(福建)股份有限公司
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