Preparation method of adsorption-photocatalysis compound type formaldehyde removing coating

Abstract

The invention relates to a preparation method of an adsorption-photocatalysis compound type formaldehyde removing coating, relating to a preparation method of a coating and aiming at solving the problems of low formaldehyde degradation efficiency and incapability of enriching formaldehyde in an existing photocatalysis coating. The preparation method disclosed by the invention comprises the following steps: (1), preparing ACF (Active Carbon Fiber) modified by concentrated nitric acid; (2), mixing butyl titanate, ethanol and acetic acid; (3), mixing ethanol, acetic acid and water, adding urea and iron nitrate nonahydrate crystals, and adjusting pH; (4), preparing TiO2 sol containing iron and nitrogen; (5), preparing ACF loaded with TiO2; (6), preparing TiO2 / ACF compound powder; and (7), mixing the TiO2 / ACF compound powder with the coating. By means of the enrichment action of ACF, the problem of low TiO2 efficiency is solved to a great extent; by means of the catalytic action of TiO2, the saturated regeneration problem of an adsorbent is effectively solved; the characteristics of the ACF and the TiO2 are complementary; the formaldehyde degradation efficiency is greatly improved. The preparation method disclosed by the invention can be used for preparing the adsorption-photocatalysis compound type formaldehyde removing coating.

Description

technical field

[0001] The invention relates to a method for preparing a paint. Background technique

[0002] As an important organic raw material, formaldehyde is widely used in the manufacture of industrial products such as resins, rubber, and plastics, and exists in large quantities in building materials. It also exists in various decorative materials such as wall coverings, wallpapers, chemical fiber carpets, foam plastics, paints, coatings and some textiles. But at the same time, formaldehyde is a gas with acute toxicity to the human body, and its harm to the human body has the characteristics of long-term, latent and concealment. Due to the heat island effect and temperature inversion weather, the city has become a gathering place for formaldehyde gas.

[0003] The purification technologies of formaldehyde pollution in the air mainly include: adsorption method and oxidation method. The adsorption method mainly uses porous solid materials to adsorb formaldehyde in th...

Examples

specific Embodiment approach 1

[0022] Embodiment 1: In this embodiment, a method for preparing an adsorption-photocatalytic compound formaldehyde-removing coating is specifically carried out according to the following steps:

[0023] 1. Wash the activated carbon fiber with deionized water, then control the temperature at 80°C to 120°C, dry it for 2 hours, then dry it at room temperature for 24 hours, then put it in concentrated nitric acid, keep it at room temperature for 2 hours, and then use deionized water Rinse until the pH of the washing solution is 7, then keep it in the air at room temperature for 24 hours, and dry to prepare concentrated nitric acid-modified ACF;

[0024] 2. Under stirring conditions, add butyl titanate to the mixed solution of absolute ethanol and glacial acetic acid to obtain liquid A. The volume ratio of butyl titanate to the mixed solution of absolute ethanol and glacial acetic acid is 1:4.5-5.5 , the volume ratio of absolute ethanol and glacial acetic acid in the mixed solution...

specific Embodiment approach 2

[0030] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mass concentration of concentrated nitric acid in step one is 65%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0031] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the volume ratio of butyl titanate to the mixed solution of absolute ethanol and glacial acetic acid in step 2 is 1:5. Others are the same as in the first embodiment.

technical field

[0001] The invention relates to a method for preparing a paint. Background technique

[0002] As an important organic raw material, formaldehyde is widely used in the manufacture of industrial products such as resins, rubber, and plastics, and exists in large quantities in building materials. It also exists in various decorative materials such as wall coverings, wallpapers, chemical fiber carpets, foam plastics, paints, coatings and some textiles. But at the same time, formaldehyde is a gas with acute toxicity to the human body, and its harm to the human body has the characteristics of long-term, latent and concealment. Due to the heat island effect and temperature inversion weather, the city has become a gathering place for formaldehyde gas.

[0003] The purification technologies of formaldehyde pollution in the air mainly include: adsorption method and oxidation method. The adsorption method mainly uses porous solid materials to adsorb formaldehyde in th...

Examples

specific Embodiment approach 1

[0022] Embodiment 1: In this embodiment, a method for preparing an adsorption-photocatalytic compound formaldehyde-removing coating is specifically carried out according to the following steps:

[0023] 1. Wash the activated carbon fiber with deionized water, then control the temperature at 80°C to 120°C, dry it for 2 hours, then dry it at room temperature for 24 hours, then put it in concentrated nitric acid, keep it at room temperature for 2 hours, and then use deionized water Rinse until the pH of the washing solution is 7, then keep it in the air at room temperature for 24 hours, and dry to prepare concentrated nitric acid-modified ACF;

[0024] 2. Under stirring conditions, add butyl titanate to the mixed solution of absolute ethanol and glacial acetic acid to obtain liquid A. The volume ratio of butyl titanate to the mixed solution of absolute ethanol and glacial acetic acid is 1:4.5-5.5 , the volume ratio of absolute ethanol and glacial acetic acid in the mixed solution...

specific Embodiment approach 2

[0030] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mass concentration of concentrated nitric acid in step one is 65%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0031] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the volume ratio of butyl titanate to the mixed solution of absolute ethanol and glacial acetic acid in step 2 is 1:5. Others are the same as in the first embodiment.

Images