Method for preparing ultra-high rare earth composite oxide ultraviolet screening agent

A rare earth compound and oxide technology, applied in the direction of coating, can solve the problems of DNA damage, skin cancer, dermal fiber damage, and high harm to human body, and achieve the effects of light aggregation, low preparation cost and good dispersibility.

Inactive Publication Date: 2010-07-28
BAOTOU RES INST OF RARE EARTHS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Ultraviolet rays are electromagnetic waves with a wavelength of 100nm to 400nm. According to different wavelengths, ultraviolet rays are usually divided into three bands: long-wave ultraviolet (UVA) wavelengths are 320nm to 400nm, which can reach the dermis of the skin, gradually destroying the elastic fibers of the skin and causing skin relaxation. Exposure to UVA radiation for a long time can cause blood vessel damage and make the skin red; medium wave ultraviolet (UVB) wavelength is 290nm ~ 320nm, mainly works on the surface layer of the skin, and can also cause damage to the dermal fibers in the skin, making the skin inside Vascular dilation, skin reddening, blisters, pigmentation, severe skin cancer can be caused; short-wave ultraviolet (UVC) wavelength is 100nm ~ 290nm, usually absorbed by the ozone layer and cannot reach the ground, but due to the serious damage to the ozone layer in recent years, some UVC It can also reach the ground through the atmosphere. In addition, a large amount of UVC can also be produced in some workplaces. Due to the high energy of UVC, it can kill bacteria, but it is also extremely harmful to the human body, such as causing cataracts, damaging DNA and causing skin cancer. Wait

Method used

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  • Method for preparing ultra-high rare earth composite oxide ultraviolet screening agent

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Example 1: Accurately weigh 7g of yttrium oxide, 2g of zinc oxide, and 1g of titanium oxide and dissolve them in 260ml of deionized water, heat, control the temperature at 60°C, and add 20ml of concentrated nitric acid to dissolve until the solution is clear. At this time, the solution is clear and transparent, and 1g of PEG 6000, then accurately weigh 16g of ammonium bicarbonate, dissolve it in 230ml deionized water with slight heat, add the carbon ammonia solution into the nitric acid mixture, control the temperature at 70°C until the reaction is complete, filter, wash, and put the precursor in the drying box Dry at a constant temperature of 100°C for 12 hours, then place in a muffle furnace and increase the temperature from 300°C to 900°C

[0018]

[0019] , heat preservation 2h, the product is white powder, the white powder particle size D measured by the United States Coulter LS230 laser particle size analyzer 50 It is 75.8nm, after being added into the polyeste...

Embodiment 2

[0020] Example 2: Accurately weigh 6g of yttrium oxide, 3g of zinc oxide, and 1g of titanium oxide, dissolve them in 260ml of deionized water, heat, control the temperature at 60°C, and add 20ml of concentrated nitric acid to dissolve until the solution is clear. At this time, the solution is clear and transparent, and 1g of PEG 6000, then accurately weigh 16g of ammonium bicarbonate, dissolve it in 230ml deionized water with slight heat, add the carbon ammonia solution into the nitric acid mixture, control the temperature at 70°C until the reaction is complete, filter, wash, and put the precursor in the drying box Dry at a constant temperature of 100°C for 12 hours, then place it in a muffle furnace and raise the temperature from 300°C to 900°C (same example 1), and keep it warm for 2 hours. The particle size of the white powder is measured by the American Coulter LS230 laser particle size analyzer 50 It is 80nm, after being added into the polyester resin coating, and detected...

Embodiment 3

[0021] Example 3: Accurately weigh 5g of yttrium oxide, 3g of zinc oxide, and 2g of titanium oxide and dissolve them in 260ml of deionized water, heat, control the temperature at 60°C, and add 20ml of concentrated nitric acid to dissolve until the solution is clear. At this time, the solution is clear and transparent, and 1g of PEG 6000, then accurately weigh 16g of ammonium bicarbonate, dissolve it in 230ml deionized water with slight heat, add the carbon ammonia solution into the nitric acid mixture, control the temperature at 70°C until the reaction is complete, filter, wash, and put the precursor in the drying box Dry at a constant temperature of 100°C for 12 hours, then place it in a muffle furnace and raise the temperature from 300°C to 900°C (same example 1), and keep it warm for 2 hours. The particle size of the white powder is measured by the American Coulter LS230 laser particle size analyzer 50 It is 90nm, after being added into the polyester resin paint, and detecte...

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Abstract

The invention relates to a method for preparing ultra-high rare earth composite oxide ultraviolet screening agent, which is characterized by comprising the steps of: formulating raw materials, including salt solution of the rare earth and oxides of two elements in IIIB-IIB, into mixed solution with the rare earth ion concentration of 0.05mol/L to 2mol/L, wherein the rare earth salt in the mixed solution accounts for 40%-80% by mass percent, adding surface dispersant for dissolution, wherein the adding amount of the surface dispersant accounts for 0.1-3% of the mixed solution by mass percent, then adding precipitating agent with the concentration of 0.1mol/L to 4mol/L to react under vigorous stirring at 50 DEG C to 90 DEG C until pH value reaches 6.5 to 7, filtering and washing the reactant, drying the reactant for 6 to 24 hours at 70 DEG C to 110 DEG C, converting the dried reactant to precursor powder with the particle size lower than 2 microns, and heating the precursor powder to 900 DEG C in a gradient manner through 300 DEG C and then preserving heat for 30 to 180 minutes to obtain the ultra-high rare earth composite oxide ultraviolet screening agent with the particle size of 20 to 300nm. The method has the advantages of: low cost, excellent quality, high efficiency, great easiness for industrial production, strong screening within the ultraviolet range from 100nm to 400nm, high thermal and chemical stability, no toxicity, no odor and great solvent resistance.

Description

Technical field: [0001] The invention relates to a preparation method of an ultrafine rare earth composite oxide ultraviolet shielding agent, belonging to the technical field of inorganic ultrafine composite material preparation. Background technique: [0002] Ultraviolet rays are electromagnetic waves with a wavelength of 100nm to 400nm. According to different wavelengths, ultraviolet rays are usually divided into three bands: long-wave ultraviolet (UVA) wavelengths are 320nm to 400nm, which can reach the dermis of the skin, gradually destroying the elastic fibers of the skin and causing skin relaxation. Exposure to UVA radiation for a long time can cause blood vessel damage and make the skin red; medium wave ultraviolet (UVB) wavelength is 290nm ~ 320nm, mainly works on the surface layer of the skin, and can also cause damage to the dermal fibers in the skin, making the skin inside Vascular dilation, skin reddening, blisters, pigmentation, severe skin cancer can be caused;...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/22C09D7/12
Inventor 张玉玺曹鸿璋贾涛
Owner BAOTOU RES INST OF RARE EARTHS
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