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Active silicon-loaded additive, preparation method and latex paint with formaldehyde purification function

A technology of active silicon and additives, applied in the field of latex paint, can solve the problems of lack of formaldehyde purification ability and good coating latex paint, and achieve good ability to capture formaldehyde molecules, increase in specific surface area and pore volume, and good VOC purification. effect of ability

Active Publication Date: 2022-07-29
北京硅宝纳米活性硅材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no latex paint with good formaldehyde purification ability and good applicability and storage

Method used

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  • Active silicon-loaded additive, preparation method and latex paint with formaldehyde purification function
  • Active silicon-loaded additive, preparation method and latex paint with formaldehyde purification function
  • Active silicon-loaded additive, preparation method and latex paint with formaldehyde purification function

Examples

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preparation example Construction

[0059] The preparation method of the latex paint with formaldehyde purification function of the present invention is to prepare active silicon first, then use active silicon, tetraammine platinum nitrate and sodium carbonate to prepare the additive 1Na-0.5Pt-Si supported on active silicon; -0.5Pt-Si additive is mixed with other components in latex paint to obtain latex paint. Specifically include the following steps:

[0060] S1, prepare active silicon. The preparation method of active silicon comprises the following steps:

[0061] S1-1. Preparation of ultrafine silica particles:

[0062] First, fly ash with a mass ratio of 1:2 and 8 mol / L NaOH solution were mixed in a three-necked flask, heated to 90 °C in a water bath, and stirred and refluxed at a speed of 300 r / min for 6 h to obtain the solute as NaSiO 3 The solution.

[0063] Next, the solution is suction filtered, the filtrate is collected, and deionized water is used to adjust the concentration of the filtrate to 0...

Embodiment 1

[0088] In this example, the silicon dioxide products obtained by each step of the active silicon in the preparation method of the present invention are respectively investigated, to illustrate that the prepared active silicon has the best microstructure.

[0089] (1) Microstructure of fly ash:

[0090] like figure 1 As shown, the SEM image of the unprocessed fly ash shows that the particle size distribution of the fly ash particles is very non-uniform. The phenomenon of agglomeration between particles is very serious, and there are a large number of hollow microbeads formed by high temperature burning.

[0091] like figure 2 The structure was characterized by XRD, and strong diffraction peaks appeared at 2θ angles of 16.4°, 26.0°, 31.0°, 33.2°, 35.2°, 37.0°, 39.2°, 40.8°, 41.0° and 42.6°. , by comparing with the standard spectrum of mullite, it can be found that the crystal planes corresponding to these values ​​are (110), (120), (210), (001), (220), (111), (130) ), (201)...

Embodiment 2

[0129] In this example, additives with different loadings of Pt were prepared, and the formaldehyde oxidation performance of each additive was tested.

[0130] According to the preparation method of the present invention, the additives of 2Na-0.1Pt-Si, 1Na-0.5Pt-Si and -2Na-0.5Pt-Si are prepared respectively. The test conditions are 100ppm formaldehyde, 20% oxygen volume content, 35% relative humidity (RH), N 2 For equilibrium gas, the mass space velocity is 100000 mL / (g cat h). Test results such as Figure 17 and 18 shown.

[0131] According to the test results, it can be seen that when there is a relative humidity of 35% in the atmosphere, the 1Na-0.5Pt-Si sample can completely remove 100ppm of formaldehyde at a mass air velocity of 100,000, increasing the space velocity to 200,000, and 2Na-0.5Pt- The formaldehyde removal rate of Si samples remained above 90%. For the 2Na-0.1Pt-Si catalyst, the removal performance of formaldehyde is also relatively poor due to the lower...

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Abstract

The invention relates to the technical field of latex paint, in particular to an active silicon-loaded additive, a preparation method and latex paint with a formaldehyde purification function. The active silicon-loaded additive is active silicon loaded with Na and Pt, the content of Na atoms accounts for 1% of the total mass of the additive, and the content of Pt atoms accounts for 0.5% of the total mass of the additive. The emulsion paint contains an active silicon-loaded additive, and the mass percent of the active silicon-loaded additive is 7%-8%. The active silicon-loaded additive takes active silicon as a carrier, has large specific surface area and pore volume, and can efficiently and stably capture formaldehyde molecules in air; and the loading capacity of Pt is very high, so that formaldehyde can be efficiently decomposed. The latex paint has good VOC (volatile organic compound) purification capacity and formaldehyde removal capacity, has good viscosity while efficiently removing formaldehyde, and is easy to coat and store.

Description

technical field [0001] The invention relates to the technical field of latex paint, in particular to an active silicon-loaded additive, a preparation method and a latex paint with formaldehyde purification function. Background technique [0002] At present, indoor air has attracted extensive attention. Formaldehyde is one of the main gases that cause indoor air pollution. Due to its low volatilization efficiency and long time under natural conditions, it often causes long-term pollution and poses a hidden danger to people's health. [0003] With the development of technology, there are more and more means to remove formaldehyde. Using latex paint with formaldehyde purification function to coat the wall is one of the methods. This method coats the latex paint on the wall, so that it can contact with the air in a large area, and has a high formaldehyde removal efficiency. At the same time, the method does not cause secondary pollution to the indoor environment and does not ...

Claims

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Application Information

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IPC IPC(8): C09D5/02C09D125/14C09D7/62D01F9/22D01F1/10
CPCC09D5/024C09D5/025C09D125/14D01F9/22D01F1/10C08K9/12C08K3/08
Inventor 余昌辉巩利先刘蔚菂
Owner 北京硅宝纳米活性硅材料有限公司
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