Hollow porous microspheres coated with titanium dioxide nanoparticles and preparation method thereof

A technology of titanium dioxide and nanoparticles, which is applied in the field of polymer nanomaterials preparation, can solve the problems of poor medium and long-wave ultraviolet shielding effect, low melting and thermal decomposition temperature, poor dispersion compatibility, etc., and achieve good extinction effect, melting temperature and heat High degradation temperature and good dispersion compatibility

Active Publication Date: 2018-06-12
浙江东太新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of poor matting effect, poor dispersion compatibility, poor shielding effect on medium and long-wave ultraviolet rays, and low melting and thermal decomposition temperature when titanium dioxide is used as an additive to prepare polymer composite materials in the prior art. A hollow porous microsphere coated with titanium dioxide nanoparticles with good extinction effect, good dispersion compatibility, good shielding effect on medium and long-wave ultraviolet rays, high melting temperature and thermal decomposition temperature

Method used

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  • Hollow porous microspheres coated with titanium dioxide nanoparticles and preparation method thereof
  • Hollow porous microspheres coated with titanium dioxide nanoparticles and preparation method thereof

Examples

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Effect test

Embodiment 1

[0040] A hollow porous microsphere coated with titanium dioxide nanoparticles, the preparation method is as follows:

[0041] (1) Preparation of modified titanium dioxide:

[0042] a) Disperse titanium dioxide in absolute ethanol and add n-butyl titanate dropwise to obtain a mixed dispersion after ultrasonic stirring, wherein the mass ratio of titanium dioxide, absolute ethanol and n-butyl titanate in the mixed dispersion is 4:150: 1;

[0043] b) Add ethanol-water mixture dropwise to the mixed dispersion, react at 70°C for 4 hours, and age at room temperature for 11 hours to obtain an aged solution. The mass ratio of ethanol to water in the ethanol-water mixture is 2:1, and the ethanol-water mixture The addition amount is 20% of the volume of the mixed dispersion liquid;

[0044] c) Drop γ-methacryloxypropyltrimethoxysilane into ethanol aqueous solution, stir and hydrolyze at room temperature for 2 hours, add it to the aging liquid dispersed by ultrasonic for 30 minutes, and...

Embodiment 2

[0051] A hollow porous microsphere coated with titanium dioxide nanoparticles, the preparation method is as follows:

[0052] (1) Preparation of modified titanium dioxide:

[0053] a) Disperse titanium dioxide in absolute ethanol and add n-butyl titanate dropwise to obtain a mixed dispersion after ultrasonic stirring, wherein the mass ratio of titanium dioxide, absolute ethanol and n-butyl titanate in the mixed dispersion is 5:200: 1;

[0054] b) Add the ethanol-water mixture dropwise to the mixed dispersion, react at 60°C for 4 hours, and age at room temperature for 10 hours to obtain an aged solution, the amount of ethanol added in the ethanol-water mixture is 30% of the volume of the mixed dispersion;

[0055] c) Drop γ-methacryloyloxypropyltrimethoxysilane into ethanol aqueous solution, stir and hydrolyze at room temperature for 3h, add it into the aging liquid dispersed by ultrasonic for 40min, and reflux at 65°C for 4.5h, Wherein the mass ratio of ethanol and water in ...

Embodiment 3

[0062] A hollow porous microsphere coated with titanium dioxide nanoparticles, the preparation method is as follows:

[0063] (1) Preparation of modified titanium dioxide:

[0064] a) Disperse titanium dioxide in absolute ethanol and add n-butyl titanate dropwise to obtain a mixed dispersion after ultrasonic stirring, wherein the mass ratio of titanium dioxide, absolute ethanol and n-butyl titanate in the mixed dispersion is 6:250: 1;

[0065] b) Add ethanol-water mixture dropwise to the mixed dispersion, react at 65°C for 4.5 hours, and age at room temperature for 11 hours to obtain an aged solution. The mass ratio of ethanol to water in the ethanol-water mixture is 3:1, and the mixture of ethanol and water The amount of liquid added is 25% of the volume of the mixed dispersion liquid;

[0066] c) Drop γ-methacryloxypropyltrimethoxysilane into ethanol aqueous solution, stir and hydrolyze at room temperature for 2.5 hours, add it into the aging liquid dispersed by ultrasonic...

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Abstract

The invention relates to hollow porous microspheres coated with titanium dioxide nanoparticles and a preparation method thereof. Styrene, a bifunctional dimethacrylate organic monomer and a photoinitiator are dissolved in a solvent to obtain an electronic injection solution; modified titanium dioxide with two-bonded surface is added in and dispersed well in the electronic injection solution; electrostatic spraying is performed under visible light to obtain the hollow porous microspheres coated with titanium dioxide nanoparticles, composed of the titanium dioxide nanoparticles and crosslinkingspheres coating the surface of the titanium dioxide nanoparticles; the crosslinking spheres are hollow, have porous surface and have crosslinking structure formed by interconnection of polymer molecular chains; the titanium dioxide nanoparticles and the crosslinking spheres are connected via covalent bonds. The hollow porous microspheres coated with titanium dioxide nanoparticles and the preparation method thereof have the advantages that the method is simple, the preparation process is reasonable, and the finally obtained hollow porous microspheres have good delustering effect, can effectively shield medium- and long-wave ultraviolet, have high melting temperature and pyrolytic temperature and have great popularization value.

Description

technical field [0001] The invention belongs to the field of polymer nanomaterial preparation, and in particular relates to a hollow porous microsphere coated with titanium dioxide nanoparticles and a preparation method thereof. Background technique [0002] In recent years, people have increasingly discovered the dangers of ultraviolet radiation. Excessive exposure to ultraviolet rays can lead to skin cancer. Ultraviolet rays can not only degrade the polymer chains in plastics, synthetic resins and rubbers, leading to the aging of materials, but also make the weather resistance of paints and coatings worse, causing paints and coatings to be easily powdered, cracked, or even peeled off. In addition, the paper’s Yellowing, brittleness, etc. are all related to ultraviolet rays. Therefore, more and more ultraviolet shielding agents are added to polymer materials, and the research on polymer materials compounded with ultraviolet absorbers has attracted more and more attention....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/18B01J13/14
CPCB01J13/14B01J13/18
Inventor 詹伟东孙宾肖露露翟丽鹏孙小国阚广乾
Owner 浙江东太新材料有限公司
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