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Method for dispersing anatase nano-titanium dioxide on the surface of building materials

A technology of nano-titanium dioxide and building materials, applied in the field of environmental protection materials, can solve the problems of large combination and achieve the effect of strong combination

Active Publication Date: 2016-02-03
RUIFU JINGFENG BEIJING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the particle size of anatase nano-titanium dioxide is large and the bonding between the plate and the plate is poor, it has no effect

Method used

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  • Method for dispersing anatase nano-titanium dioxide on the surface of building materials
  • Method for dispersing anatase nano-titanium dioxide on the surface of building materials
  • Method for dispersing anatase nano-titanium dioxide on the surface of building materials

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Experimental program
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Effect test

Embodiment 1

[0036] Tetrabutyl titanate and isopropanol were mixed to obtain tetrabutyl titanate isopropanol solution. In the tetrabutyl titanate isopropanol solution, the mass concentration of tetrabutyl titanate is 4%. A PVP aqueous solution with a weight concentration of 2% was obtained. In a state of stirring, tetrabutyl titanate isopropanol solution is added into PVP aqueous solution, and the pH is controlled at ≤ 2 at the same time, so that tetrabutyl titanate is hydrolyzed to obtain anatase nano-titanium dioxide sol. Kiln the tiles at a temperature of 400°C for 10 minutes to remove dust and oil stains on the surface of the tiles, and then disperse the anatase nano-titanium dioxide sol on the surface of the material through a spraying process, and then kiln at a temperature of 400°C for 15 minutes. Other compounds in the anatase nano-titanium dioxide sol are removed to retain the anatase nano-titanium dioxide, thereby dispersing the anatase nano-titanium dioxide on the surface of th...

Embodiment 2

[0038] Tetrabutyl titanate and isopropanol were mixed to obtain tetrabutyl titanate isopropanol solution. In the tetrabutyl titanate isopropanol solution, the mass concentration of tetrabutyl titanate is 5%. A PVP aqueous solution with a weight concentration of 2% was obtained. In the state of stirring, add tetrabutyl titanate isopropanol solution into PVP aqueous solution, and control the pH value to 1.8 at the same time, so that tetrabutyl titanate is hydrolyzed to obtain anatase nano-titanium dioxide sol; Add hydroxypropyl methylcellulose. Kiln the tiles at a temperature of 450°C for 15 minutes to remove dust and oil stains on the surface of the tiles, then disperse the anatase nano-titanium dioxide sol on the surface of the material by a screen printer, and then kiln at a temperature of 450°C for 20 minutes.

Embodiment 3

[0040]Tetrabutyl titanate and isopropanol were mixed to obtain tetrabutyl titanate isopropanol solution. In the tetrabutyl titanate isopropanol solution, the mass concentration of tetrabutyl titanate is 6%. A PVP aqueous solution with a mass concentration of 2% was obtained. In a state of stirring, tetrabutyl titanate isopropanol solution is added into PVP aqueous solution, and the pH value is controlled at 1.5 at the same time, so that tetrabutyl titanate is hydrolyzed to obtain anatase nano-titanium dioxide sol. Kiln the tiles at a temperature of 500°C for 20 minutes to remove dust and oil stains on the surface of the tiles, then disperse the anatase nano-titanium dioxide sol on the surface of the material through a spraying process, and then kiln at a temperature of 550°C for 25 minutes. Other compounds in the titanium-type nano-titanium dioxide sol are removed to retain the anatase-type nano-titanium dioxide, thereby dispersing the anatase-type nano-titanium dioxide on th...

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Abstract

The invention provides a method for dispersing anatase nano-TiO2 on the surface of a building material. The method comprises the following steps: mixing tetrabutyl titanate and isopropanol to obtain a 4-6% tetrabutyl titanate isopropanol solution by mass concentration and a 2% PVP (Polyvinyl Pyrrolidone) aqueous solution by mass concentration; adding the tetrabutyl titanate isopropanol solution into the PVP aqueous solution under stirring and simultaneously controlling pH to be not more than 2 so that tetrabutyl titanate is hydrolyzed to obtain anatase nano-TiO2 sol; and dispersing the anatase nano-TiO2 sol on the surface of a material and then kilning at the temperature of 400-550 DEG C. By using the preparation method of the anatase nano-TiO2, the adhesion force between the anatase nano-TiO2 and the material can be improved.

Description

technical field [0001] The invention belongs to the field of environmental protection materials, and relates to a method for dispersing anatase nano-titanium dioxide on the surface of building materials. Background technique [0002] Anatase nano-titanium dioxide has the properties of photocatalytic decomposition of organic compounds, antibacterial and super-hydrophilic properties, and is an available environmental protection material. The study found that the anatase nano-titanium dioxide photocatalyst is irradiated by near-ultraviolet light (such as sunlight or fluorescent lamps, etc.), the electrons in the molecule are excited to generate electron-hole pairs. Among them, the positively charged holes have a strong oxidizing ability, which can make the water molecules in the air generate a strong oxidant of hydroxyl radicals (OH); the negatively charged electrons can make the oxygen (O 2 ) reduction to generate another strong active free radical O 2- . ·OH and ·O 2- The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/50C04B41/85C03C17/25
Inventor 徐伯豫
Owner RUIFU JINGFENG BEIJING TECH