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Attapulgite for UV protection and preparation method thereof

A technology of attapulgite and ultraviolet rays, which is applied in the direction of chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problem of difficult dispersion, inability to effectively reflect the ultraviolet shielding function, and inability to solve the weather resistance and light stability of attapulgite ultraviolet blocking materials Sexual dispersibility and other issues, to achieve good light stability, improve the effect of dispersibility and compatibility

Active Publication Date: 2017-01-11
江苏纳欧新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Some existing ultraviolet blocking materials use rutile nano-titanium dioxide and nano-zinc oxide on the surface of attapulgite. Although this method solves the problem of agglomeration of nano-titanium dioxide and nano-zinc oxide particles, it cannot solve the problem of attapulgite ultraviolet blocking materials. Weather resistance (or light stability) and dispersibility in non-polar systems
The so-called insufficient weather resistance is that the nano-titanium dioxide loaded on the surface of attapulgite has a certain photocatalytic activity, and will generate atomic oxygen and hydroxyl radicals under sunlight. Hydroxyl radicals have strong oxidation activity and will The surrounding organic matter is oxidatively decomposed; in addition, the surface of the barrier material prepared by this method is hydrophilic, which is suitable for use in polar systems, but it is difficult when it is added to organic systems such as plastics, rubber, chemical fibers and solvent-based coatings. Scattered, cannot effectively reflect its UV shielding function

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) to 1.5mol L -1 Attapulgite powder was added to the sodium hydroxide solution, the temperature was raised to 110°C and the reaction was kept for 12 hours to obtain alkali-treated attapulgite slurry;

[0026] (2) Adjust the temperature of the attapulgite slurry obtained in step (1) to 45°C, and add -1 Titanium tetrachloride aqueous solution until the pH value of the system is 7.0, filter, wash the filter cake to remove ions therein, and prepare a filter cake containing attapulgite and titanium dioxide hydrate;

[0027] (3) According to the mass ratio of rutile nano-titanium dioxide and attapulgite to 0.6:1, the filter cake containing attapulgite and titanium dioxide hydrate obtained in step (2) is added to 0.5mol L -1 Mix uniformly in the titanium tetrachloride aqueous solution, heat up to reflux state and react for 5 hours, obtain the acidic dispersion slurry of rutile nano-titanium dioxide loaded on the surface of attapulgite;

[0028] (4) After heating the acidic...

Embodiment 2

[0030] (1) to 2.5mol L -1 Attapulgite powder was added to the sodium hydroxide solution, the temperature was raised to 100°C and the reaction was kept for 20 hours to obtain alkali-treated attapulgite slurry;

[0031] (2) Adjust the temperature of the attapulgite slurry obtained in step (1) to 50°C, and add -1 Titanium tetrachloride aqueous solution until the pH value of the system is 7.0, filter, wash the filter cake to remove ions therein, and prepare a filter cake containing attapulgite and titanium dioxide hydrate;

[0032] (3) According to the mass ratio of rutile nano-titanium dioxide and attapulgite to 0.8:1, the filter cake containing attapulgite and titanium dioxide hydrate obtained in step (2) is added to 0.5mol L -1 Mix uniformly in the titanium tetrachloride aqueous solution, heat up to reflux state and react for 7 hours to obtain an acidic dispersion slurry of rutile nano-titanium dioxide loaded on the surface of attapulgite;

[0033] (4) After heating the acidi...

Embodiment 3

[0035] (1) Add attapulgite powder to 0.5 mol L-1 sodium hydroxide solution, heat up to 125° C. and keep warm for 13 hours to obtain alkali-treated attapulgite slurry;

[0036] (2) Adjust the temperature of the attapulgite slurry obtained in step (1) to 25° C., and add an aqueous solution of titanium tetrachloride with a concentration of 1.5 mol L-1 to the system until the pH value of the system is 8.0, filter, Washing the filter cake to remove ions therein to obtain a filter cake containing attapulgite and titanium dioxide hydrate;

[0037] (3) According to the mass ratio of rutile nano-titanium dioxide and attapulgite to 0.3:1, the filter cake containing attapulgite and titanium dioxide hydrate obtained in step (2) is added to 0.8mol L-1 tetrachloride Mix evenly in the titanium aqueous solution, heat up to reflux and react for 3 hours to obtain an acidic dispersion slurry of rutile nano-titanium dioxide loaded on the surface of attapulgite;

[0038] (4) After raising the tem...

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PUM

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Abstract

The invention belongs to the field of nano-materials and inorganic non-metallic materials and relates to attapulgite for UV protection and a preparation method thereof. Attapulgite carries rutile-type nanometer titanium dioxide, aluminum hydroxide and fatty acid. The alkali activated attapulgite is conducive to uniform and firm immobilization of rutile-type nanometer titanium dioxide on the surface of attapulgite. The protection material has good light stability (weatherability), can be used for outdoor organic polymer material UV protection and does not discolor. The hydrophobicity of the material surface improves dispersibility and compatibility in a nonpolar organic system.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer materials and inorganic non-metallic materials, in particular to an attapulgite for ultraviolet protection and a preparation method thereof. Background technique [0002] The wavelength range of ultraviolet rays in sunlight is 200-400nm. Although its energy only accounts for about 5% of the total energy of solar radiation, it will cause serious damage to organisms on the earth due to its short wavelength and high energy. Rutile nano-titanium dioxide is an efficient inorganic ultraviolet protection material, which has the characteristics of good ultraviolet shielding performance, high safety, and excellent transparency. [0003] Some existing ultraviolet blocking materials use rutile nano-titanium dioxide and nano-zinc oxide on the surface of attapulgite. Although this method solves the problem of agglomeration of nano-titanium dioxide and nano-zinc oxide particles, it cannot solve the probl...

Claims

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Application Information

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IPC IPC(8): C01B33/40
CPCC01B33/40C01P2004/80
Inventor 姚超左士祥刘文杰魏科年崔家岗李霞章罗士平
Owner 江苏纳欧新材料有限公司
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