Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of nano cerium oxide/silicon dioxide ultraviolet shielding agent

A technology of ultraviolet shielding agent and nano cerium oxide, which is applied in the field of preparation of ultraviolet shielding agent, can solve problems such as poor quality, polymer matrix reducing material service life, polymer matrix incompatibility, etc., to improve use efficiency and reduce photocatalysis Effects of reactivity, resistance to collisional aggregation and gravitational settling

Active Publication Date: 2020-06-12
山东新朗华科技有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention: for the existing ultraviolet shielding agent has poor light and thermal stability, is incompatible with the polymer matrix, and has strong photocatalytic activity. When ultraviolet rays are irradiated, photochemical reactions will be triggered, and then The problem of causing degradation of the polymer matrix and greatly reducing the service life of the material provides a preparation method of nano-cerium oxide / silicon dioxide ultraviolet shielding agent

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of nano cerium oxide/silicon dioxide ultraviolet shielding agent

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] Take 5g of styrene monomer and 0.6g of acrylic acid monomer, add them into 150mL of deionized water, stir and heat at 300r / min under nitrogen atmosphere to 70°C, continue stirring for 1h, add 0.1g of potassium persulfate, keep stirring for 8h, and cool to After filtering at room temperature to obtain the filter residue, wash the filter residue twice with deionized water, and then wash twice with absolute ethanol to obtain polystyrene-acrylic acid microspheres, take 5 g of polystyrene-acrylic acid microspheres, add them to 100 g of absolute ethanol, Ultrasonic dispersion with 300W ultrasonic wave for 30min to obtain polystyrene-acrylic acid microsphere dispersion liquid, take 4g polystyrene-acrylic acid microsphere dispersion liquid, add 50g mass fraction of 10% sodium silicate solution, and disperse with 300W ultrasonic wave for 20min, Reheat to 70°C and add 40g of 8% cerium chloride solution dropwise at 0.5ml / min, continue to stir at 300r / min until the addition is compl...

example 2

[0030] Take 8g of styrene monomer and 0.9g of acrylic acid monomer, add them into 225mL of deionized water, stir and heat at 350r / min under nitrogen atmosphere to 75°C, keep stirring for 1h, add 0.1g of potassium persulfate, keep stirring for 9h, and cool to After filtering at room temperature to obtain the filter residue, wash the filter residue 2 times with deionized water, and then wash 2 times with absolute ethanol to obtain polystyrene-acrylic acid microspheres. Take 8 g of polystyrene-acrylic acid microspheres and add them to 150 g of absolute ethanol. Ultrasonic dispersion with 300W ultrasonic wave for 35min to obtain polystyrene-acrylic acid microsphere dispersion liquid, take 6g polystyrene-acrylic acid microsphere dispersion liquid, add 80g mass fraction of 10% sodium silicate solution, and disperse with 300W ultrasonic wave for 25min, Reheat to 75°C and add 60g of 8% cerium chloride solution dropwise at 0.8ml / min, continue to stir at 350r / min until the addition is comp...

example 3

[0032] Take 10g of styrene monomer and 1.2g of acrylic acid monomer, add them into 300mL of deionized water, stir and heat at 400r / min under nitrogen atmosphere to 80°C, keep stirring for 2h, add 0.2g of potassium persulfate, keep stirring for 10h, and cool to After filtering at room temperature to obtain the filter residue, wash the filter residue 3 times with deionized water, and then wash 3 times with absolute ethanol to obtain polystyrene-acrylic acid microspheres. Take 10 g of polystyrene-acrylic acid microspheres and add them to 200 g of absolute ethanol. Ultrasonic dispersion with 300W ultrasonic wave for 40min to obtain polystyrene-acrylic acid microsphere dispersion liquid, take 8g polystyrene-acrylic acid microsphere dispersion liquid, add 100g mass fraction of 10% sodium silicate solution, and disperse with 300W ultrasonic wave for 30min, Reheat to 80°C and add 80g of cerium chloride solution with a mass fraction of 8% at 1.0ml / min dropwise, continue to stir at 400r / ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparation method of a nanometer cerium oxide / silicon dioxide ultraviolet shielding agent, and belongs to the technical field of ultraviolet shielding agent preparation. Byusing inorganic nanometer hollow materials, light entering an inner cavity can be reflected and refracted for many times on the inner spherical surface; the characteristic of light absorption rate improvement is realized. Polystyrene-acrylic acid microspheres are prepared and are used as a template; a coprecipitation method is used for realizing the decomposition onto the surface of the template;then, roasting is performed to obtain the hollow microspheres; a coupling agent and organic matter composite coating method is used; a thick organic coating layer is formed; a steric hindrance layeris formed; the space steric hindrance effect is reinforced, so that the steric hindrance repulsive effect between the particles can be increased; the collision gathering and gravity settling of the particles can be prevented; meanwhile, coated hollow spheres cannot realize the direct contact with other ingredients; the possibility of other ingredients for taking chemical reaction is reduced; meanwhile, the water activity on the surface of the nanometer particles and the surface hydroxyls are reduced; the adsorbent diffusion time on oxygen gas is prolonged; the photocatalysis activity is further reduced; the stability is enhanced.

Description

technical field [0001] The invention relates to a preparation method of a nano cerium oxide / silicon dioxide ultraviolet shielding agent, belonging to the technical field of ultraviolet shielding agent preparation. Background technique [0002] For a long time, ultraviolet rays in sunlight have attracted widespread attention due to their damage to human skin and the aging degradation of materials such as wood, plastic, and rubber. Especially with the intensification of human industrial activities, the ozone layer that can absorb UVC has been greatly damaged, the dose of ultraviolet rays reaching the earth's surface is increasing, and the wavelength tends to be shorter. The shorter the wavelength of ultraviolet rays, the higher the energy, and the greater the damage caused. Therefore, it is more urgent to develop materials that can effectively shield ultraviolet rays. Polymer-based UV shielding coating materials have the advantages of good flexibility, strong processability, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/32C09D7/62
CPCC08K3/36C08K9/10C08K2003/2213C09D5/32
Inventor 姜向军王文新韩昏晓
Owner 山东新朗华科技有限公司