Coating and preparation method thereof

A coating, titanium dioxide technology, applied in chemical instruments and methods, coatings, fibrous fillers, etc., can solve the problems of disordered arrangement, inability to have multiple functions, single nanoparticle performance, etc.

Active Publication Date: 2012-01-04
JIANGSU KAOPULE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing nano-coatings either cannot have multiple functions due to the relatively single performance of a single nano-particle, or because they contain a simple mixture of two or more types of nanoparticles, and the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] The preparation of coating of the present invention

[0045] The coating of the present invention is obtained by mixing surface-modified titanium dioxide and silicon dioxide core-shell nanocomposite particles, film-forming components, optional pigments and fillers, and optional additives in a solvent, wherein the surface-modified titanium dioxide The weight ratio of the core-shell nanocomposite particles of silicon dioxide and the film-forming component is 1:9-99, preferably 1:12-60, more preferably 1:16-45.

[0046] As mentioned above, the surface-modified core-shell nanocomposite particles of titania and silica used can be a dispersion of surface-modified titania and silica core-shell nanocomposite particles in a wetting agent, or are core-shell nanocomposite particles of surface-modified titanium dioxide and silicon dioxide obtained by drying, the latter being preferred.

[0047] The film-forming components used can be, for example, fluorocarbon resins, polyuretha...

Embodiment 1

[0060] Add 2.7 kg of titanium dioxide nanoparticles with a particle diameter of 2-8 nm into 50 liters of 0.25 mol / L methanol-containing aqueous solution under stirring, and continue stirring for 1 hour at room temperature. Add 33.8 liters of sodium silicate aqueous solution with a concentration of 1 mol / L to the above-mentioned dispersion of titanium dioxide nanoparticles in an aqueous solution containing methanol at a feed rate of 0.45 L / min at a stirring speed of 200 rpm, during the feeding process The temperature and pH of the dispersion system were maintained at 70°C and 9, respectively. After the feed was complete, sonicate for 1 hour. The resulting reaction product was filtered, washed and dried to obtain 4.73 kg of core-shell nanocomposite particles of titanium dioxide and silicon dioxide with a particle size of 15-24 nm. The obtained core-shell nanocomposite particles of titanium dioxide and silicon dioxide were dispersed in 14 kg of acetone under stirring, and the st...

Embodiment 2

[0062]Add 2.7 kg of titanium dioxide nanoparticles with a particle diameter of 2-8 nm into 50 liters of 0.3 mol / L ethanol-containing aqueous solution under stirring, and continue stirring for 1 hour at room temperature. At a stirring speed of 250rpm, with a feed rate of 0.65L / min, 135.2 liters of sodium silicate aqueous solution with a concentration of 0.5mol / L are added to the above-mentioned dispersion of titanium dioxide nanoparticles in an aqueous solution containing ethanol, during the addition process The temperature and pH of the dispersion system were maintained at 80°C and 9.1, respectively. After the addition was complete, sonicate for 1 hour. The resulting reaction product was filtered, washed and dried to obtain 6.76 kg of core-shell nanocomposite particles of titanium dioxide and silicon dioxide with a particle diameter of 18-35 nm. The obtained core-shell nanocomposite particles of titanium dioxide and silicon dioxide and 33.8 g of oleic acid were added to 22 kg...

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Abstract

The invention relates to a coating, which comprises the following components: surface-modified titanium dioxide and silicon dioxide core-shell nanocomposite particles and a film forming component, wherein a weight ratio of the surface-modified titanium dioxide and silicon dioxide core-shell nanocomposite particles to the film forming component is 1:(9-99); the surface-modified titanium dioxide and silicon dioxide core-shell nanocomposite particles consist of titanium dioxide and silicon dioxide core-shell nanocomposite particles serving as a matrix and a dispersing agent coated thereon, wherein the content of the dispersing agent is 0.1 to 1.5 percent based on the weight of the titanium dioxide and silicon dioxide core-shell nanocomposite particles; and the titanium dioxide and silicon dioxide core-shell nanocomposite particles consist of titanium dioxide nanoparticles serving as cores and silicon dioxide serving as shells, wherein a molar ratio of the titanium dioxide and the silicon dioxide is 1:(1-8), and the titanium dioxide and silicon dioxide core-shell nanocomposite particles have the grain size of 10-60nm. The invention also relates to a method for preparing the coating.

Description

technical field [0001] The present invention relates to a coating, and more particularly, to a coating containing core-shell nanocomposite particles of surface-modified titanium dioxide and silicon dioxide. The invention further relates to a method for the preparation of said coating. Background technique [0002] With the improvement of people's living standards, higher requirements are put forward for architectural coatings. It is required that architectural coatings not only have decorative functions, but also have functions such as radiation protection, degradation of harmful gases, air purification, and sterilization. [0003] Nano-titanium dioxide is safe, non-toxic, stable and has a long service life. In the presence of light and water, it has a strong degradation effect on harmful gases in the air such as nitrogen oxides, formaldehyde, toluene, etc. and a strong killing effect on bacteria. At the same time, nano-titanium dioxide has a strong ability to absorb ultr...

Claims

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Application Information

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IPC IPC(8): C09D127/12C09D127/16C09D127/20C09D127/18C09D7/12C09C1/36C09C1/28C09C3/12C09C3/08C09C3/06
Inventor 纪志勇张丽娟李昊耿雷陶月明徐瑞芬
Owner JIANGSU KAOPULE NEW MATERIALS
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