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Nano meso-porous titanium dioxide coating having high efficiency antibacterial and air purification function

A nano-mesoporous, titanium dioxide technology, applied in the field of coatings, can solve the problems of limiting the efficiency of organic volatile substances, weak adsorption, etc., and achieve the effect of significant degradation effect, strong elimination effect, and purification of a wide range of pollutants.

Inactive Publication Date: 2009-04-29
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In gas-phase photocatalysis, the adsorption of low-concentration organic volatile substances on the catalyst surface is the rate-controlling step of the entire photocatalytic oxidation process, and the weak adsorption of organic volatile substances by the coating limits its photocatalytic degradation of organic volatile substances. material efficiency

Method used

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  • Nano meso-porous titanium dioxide coating having high efficiency antibacterial and air purification function

Examples

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Effect test

Embodiment 1

[0037] React sodium titanate in a humid atmosphere with a temperature of 100°C and a humidity of 50% for 1 hour, then wash with water, and finally air roast to obtain a particle size of 1 μm and a specific surface area of ​​100m 2 / g, granular nano-mesoporous titanium dioxide with a mesoporous diameter of 5 nm. Proportionally take nanometer mesoporous titanium dioxide and inorganic pigment and filler titanium dioxide and put them into a high-speed disperser to disperse for 50 minutes at a speed of 1500rpm, take them out and add them to a mixer, and slowly add ethylene glycol, acrylic resin and sodium polyacrylate at a stirring speed of 300rpm , benzyl alcohol, emulsified silicone oil, hydroxyethyl cellulose, and diphenylpolysiloxane, and continue to stir for 80 minutes to obtain the novel nanometer mesoporous titanium dioxide coating with high-efficiency antibacterial and air-purifying functions of the present invention.

[0038] The content of each component in the coating is...

Embodiment 2

[0040] Sodium titanate was reacted in a humid atmosphere with a temperature of 100°C and a humidity of 95% for 5 hours, washed with water, and finally air-calcined to obtain a particle size of 5 μm, a pore size of 15 nm, and a specific surface area of ​​80 m 2 / g of whisker-like nano-mesoporous titanium dioxide. Immerse 1g of nano-mesoporous titanium dioxide in 5ml of 0.1mol / l ferric nitrate solution for 5h, then add 20ml of 0.1mol / l NaOH aqueous solution for immersion for 1h to convert metal ions into metal hydroxide, filter and roast at 300°C for 2h Nanoscale mesoporous titania doped with transition metal ions Fe was obtained.

[0041] Put the nanometer mesoporous titanium dioxide doped with transition metal ion Fe and the talc powder of inorganic pigment and filler into a high-speed disperser and disperse at a speed of 2000rpm for 80 minutes, take it out and add it to the mixer, and slowly add the solvent ethyl acetate Ester, epoxy resin, sodium oleate, lauryl alcohol este...

Embodiment 3

[0044] The preparation process of the coating is as described in Example 1. The content of each component is: Pt-loaded nano-mesoporous titanium dioxide 10% (particle size 6μm, pore size 6nm, specific surface area 90m 2 / g), acetone 40%, acrylic resin 31.3%, octadecylamine acetate 0.1%, glycol butyl ether 1%, emulsified silicone oil 0.6%, hydroxyethyl cellulose 1%, diphenyl polysiloxane Alkanes 4%, silica 12%.

[0045] The preparation method of Pt loaded nanometer mesoporous titanium dioxide is: the sodium hydroxide ethylene glycol solution of 10ml 0.1mol / l is added dropwise in the ethylene glycol solution of the 0.01mol / l chloroplatinic acid of 5ml vigorous stirring, nitrogen gas Heating to 160°C under protection, constant temperature for 3 hours, after cooling, add 2 g of nano-mesoporous titanium dioxide prepared by the method in Example 2 and stir for 4 hours, add hydrochloric acid in ethylene glycol solution, adjust the pH value to between 2 and 4, and stir for 5 hours A...

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Abstract

The invention discloses a mesoporous nano titania coating with the functions of high-efficiency antibacterium and air purification. The compositions of the coating in percentage by weight are 1 to 10 percent of mesoporous nano titania, 20 to 60 percent of solvent, 20 to 55 percent of film-forming resin, 0.02 to 10 percent of dispersant and other auxiliary agent, and 10 to 30 percent of inorganic pigment filler. The coating takes the mesoporous nano titania or a modifier of the mesoporous nano titania as an active ingredient, has the functions of high-efficiency antibacterium and air purification after curing and film forming, can be widely applied to an internal wall and an external wall of a building. The mesoporous nano titania coating has simple preparation method and wide pollutant purification scope, has an eradicative rate of more than 85 percent on Escherichia coli, Staphylococcus aureus and Candida albicans within 1 hour, has a degradation rate of more than 90 percent on formaldehyde, benzene and toluene, can be excited to generate photocatalysis by faint ultraviolet light in sunlight or illumination light, and still has obvious effect on degradation of low-concentration pollutant.

Description

technical field [0001] The invention relates to paint technology, in particular to a nanometer mesoporous titanium dioxide paint with high-efficiency antibacterial and air purification functions. Background technique [0002] Microorganisms such as bacteria exist in various places around us. With the rapid development of modern industry, environmental problems are becoming more and more serious. People's awareness of environmental protection is gradually increasing, and the demand for functional environmental protection coatings is becoming more and more urgent. The traditional bactericidal paint is to add bactericides to the paint, such as organic substances such as substituted aromatic hydrocarbons, heterocyclic compounds, amine compounds and organometallic compounds. However, such substances have different degrees of toxicity and cause certain pollution to the environment, so their safety is questionable. Chinese patent CN1454944A uses a specially prepared nano-titaniu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/14C09D7/12A61L9/18
Inventor 陆小华张建平杨祝红刘畅李东冯新
Owner NANJING UNIV OF TECH
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