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Composite air purification coating material and preparation method thereof

A technology of air purification and air purification particles, which is applied in the field of composite air purification coatings and its preparation, can solve the problems of coating aging and inconspicuous air purification effect, and achieve the advantages of promoting adsorption, long-term air purification effect, high efficiency and Effect

Active Publication Date: 2013-01-16
DALIAN POLYTECHNIC UNIVERSITY
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Problems solved by technology

However, it has been reported that photocatalytic particles often degrade the coating itself while photocatalytically degrading organic pollutants in the air, resulting in obvious aging phenomenon of the coating; on the other hand, adding adsorption particles and photocatalytic Particles, often due to the adsorption saturation of adsorptive particles and photocatalytic particles and the limit of photocatalytic degradation, the air purification effect is not obvious

Method used

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  • Composite air purification coating material and preparation method thereof
  • Composite air purification coating material and preparation method thereof
  • Composite air purification coating material and preparation method thereof

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preparation example Construction

[0039] (1) Preparation of paint-coated samples for testing

[0040] In the present invention, in order to test the adsorption / photocatalytic performance of the prepared coating, the prepared coating is coated on different substrates, and the specific steps are as follows:

[0041] ① Cement substrate coating: Cut the cement substrate into small pieces of about 3.5cm×3.5cm, apply 3 to 5 layers of paint on the small pieces with a glass rod by roller coating method, and dry at room temperature for 1 day.

[0042] ②Glass substrate coating: Use 5 layers of adhesive tape to enclose a 5cm×9.5cm space on a glass piece of appropriate size, use the roller coating method to coat the film in the space with a glass rod, and dry at room temperature for 1 day to obtain a glass piece with 5 Coating film samples with the thickness of one layer of tape and an area of ​​5cm×9.5cm.

[0043] (2) Determination of adsorption / photocatalytic degradation performance test of cement substrate coating fil...

Embodiment 1

[0054] Preparation containing TiO 2 -SiO 2 Composite air-purifying coatings with composite aerogels:

[0055] ① with TiO 2 -SiO 2 Preparation of composite air-purifying coatings with composite airgel as adsorption / photocatalyst

[0056] Firstly, TiO was prepared by atmospheric pressure drying process. 2 -SiO 2 Composite airgel, the preparation method refers to the patent ZL200810011646.4, the specific process is as follows: using industrial water glass and titanium tetrachloride as raw materials, respectively prepare titanium tetrachloride aqueous solution and silicic acid solution, and mix the two in proportion to obtain Ti / TiO with a Si molar ratio of 4:1 2 -SiO 2 Composite sol, add hexamethyldisiloxane, trimethylchlorosilane and n-hexane to the sol, use n-hexane / trimethylchlorosilane for solvent replacement / surface modification after gelling, and finally pass 120 Drying at ~150°C under normal pressure to obtain TiO with a Ti / Si molar ratio of 4:1 2 -SiO 2 Composi...

Embodiment 2

[0062] Preparation containing SiO 2 Aerogel and WO 2 -TiO 2 Composite photocatalyst air purification coating:

[0063] ① WO 3 -TiO 2 Preparation of composite materials

[0064] Preparation of WO by hydrothermal method 3 -TiO 2 Composite photocatalyst, the specific process is as follows: using titanium sulfate and sodium tungstate as raw materials, first prepare titanium sulfate solution and tungstic acid solution, and mix the two solutions to obtain WO with a W / Ti molar ratio of 0.05:1. 3 -TiO 2 Precursor solution, which was transferred to an autoclave lined with polytetrafluoroethylene, and reacted at 190°C for 2 hours to obtain WO with a W / Ti molar ratio of 0.05:1. 3 5mol%-TiO 2 Composite photocatalyst powder.

[0065] ②Composite air purification paint preparation

[0066] Take 0.500g SiO 2 Airgel (SiO 2 Preparation method of airgel and TiO 2 -SiO 2 Composite airgel is similar, using industrial water glass as raw material, first prepare SiO 2 Sol, after gelli...

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Abstract

The invention relates to a novel composite air purification coating material and a preparation method thereof and belongs to the technical field of environment-friendly functional coating and air purification. Aerogel and photocatalysts are used as adsorption / photocatalytic functional fillers in the coating, prepared adsorption / photocatalyst dispersion liquid and acrylic emulsion or fluorocarbon emulsion are mixed, and an appropriate quantity of dispersing agents, coalescing agents, defoaming agents and the like are added so as to obtain the novel composite air purification coating. Compared with air purification coatings in prior art, the novel composite air purification coating is efficient and permanent in air purification effect. The test result of adsorption / photocatalytic degradation of formaldehyde shows that the formaldehyde concentration is decreased from 0.39mg / m3 to 0.04 to 0.05mg / m3 after 5 to 6 hours of adsorption / photocatalytic degradation, and the adsorption / photocatalytic degradation rate reaches to 79.49% to 89.74%.

Description

technical field [0001] The invention relates to a novel composite air-purifying coating and a preparation method thereof, belonging to the technical field of environment-friendly functional coatings and air purification. Background technique [0002] With the improvement of people's living standards and the extensive use of building decoration materials, more and more people pay more and more attention to the health problems of the indoor air environment on the human body. Therefore, environmentally friendly functional architectural coatings are also receiving more and more attention. For example, patent ZL 02810799.3 invented a photocatalytic coating with photocatalytic activity and adsorption properties, in which the adsorbent is mainly magnesium or calcium silicate or diatomaceous earth, and the photocatalyst is TiO 2 Or ZnO-based, the coating itself is a solvent-based coating. Patent ZL 200510011793.8 provides a nitrogen-doped nano-titanium dioxide modified photocatalyt...

Claims

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Application Information

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IPC IPC(8): C09D125/14C09D133/04C09D133/00C09D131/04C09D127/12C09D5/00
Inventor 刘敬肖白麓楠史非
Owner DALIAN POLYTECHNIC UNIVERSITY
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