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Modification method of nanometer titanium dioxide

A nano-titanium dioxide, modified technology, applied in chemical instruments and methods, dyed low-molecular-weight organic compound treatment, dyed high-molecular-weight organic compound treatment, etc. Good stability, simple process, good dispersion effect

Inactive Publication Date: 2017-09-05
LIUZHOU BOZE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of this treatment method is more complicated, the control process is difficult, the cost is higher, and it is difficult to realize industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A modification method of nano titanium dioxide, comprising the following steps:

[0022] (1) Transport the nano-titanium dioxide to the surface treatment tank, then add sodium stearate dispersant and water, control the temperature at 60°C, stir at a speed of 300r / min for 30min, and obtain a nano-titanium dioxide dispersion with a mass concentration of 15%; The add-on of described sodium stearate dispersant is 1.5% of nano titanium dioxide weight;

[0023] (2) Add the above-mentioned nano-titanium dioxide dispersion liquid into an ultrasonic generator, then add betaine and sodium polyacrylate composite modifier, and ultrasonicate for 40 minutes at a temperature of 60°C and a frequency of 50 Hz to obtain a modified nano-titanium dioxide liquid; the beet The mass ratio of alkali and sodium polyacrylate is 2:1; The addition of betaine and sodium polyacrylate composite modifier is 2.5% of the weight of nano-titanium dioxide;

[0024] (3) Filter the modified nano-titanium di...

Embodiment 2

[0026] A modification method of nano titanium dioxide, comprising the following steps:

[0027] (1) Transport the nano-titanium dioxide to the surface treatment tank, then add sodium stearate dispersant and water, control the temperature at 50°C, stir at a speed of 500r / min for 20min, and obtain a nano-titanium dioxide dispersion with a mass concentration of 20%; The add-on of described sodium stearate dispersant is 1.0% of nano titanium dioxide weight;

[0028] (2) Add the above-mentioned nano-titanium dioxide dispersion into an ultrasonic generator, then add betaine and sodium polyacrylate composite modifier, and ultrasonicate for 30 minutes at a temperature of 50°C and a frequency of 60 Hz to obtain a modified nano-titanium dioxide solution; the beet The mass ratio of alkali and sodium polyacrylate is 1:1; The addition of betaine and sodium polyacrylate composite modifier is 1.5 of the weight of nano-titanium dioxide;

[0029] (3) Filter the modified nano-titanium dioxide ...

Embodiment 3

[0031] A modification method of nano titanium dioxide, comprising the following steps:

[0032] (1) Transport the nano-titanium dioxide to the surface treatment tank, then add sodium stearate dispersant and water, control the temperature at 70°C, stir at a speed of 300r / min for 25min, and obtain a nano-titanium dioxide dispersion with a mass concentration of 25%; The add-on of described sodium stearate dispersant is 2.0% of nano titanium dioxide weight;

[0033] (2) Add the above-mentioned nano-titanium dioxide dispersion into an ultrasonic generator, then add betaine and sodium polyacrylate composite modifier, and ultrasonicate for 60 minutes at a temperature of 70°C and a frequency of 50 Hz to obtain a modified nano-titanium dioxide solution; the beet The mass ratio of alkali and sodium polyacrylate is 3:1; The addition of betaine and sodium polyacrylate composite modifier is 2.0 of the weight of nano-titanium dioxide;

[0034] (3) Filter the modified nano-titanium dioxide ...

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Abstract

The invention discloses a method for modifying nano-titanium dioxide. The nano-titanium dioxide is transported to a surface treatment tank, then sodium stearate dispersant and water are added and stirred to obtain a nano-titanium dioxide dispersion; the nano-titanium dioxide dispersion is added to the ultrasonic wave Generator, then add betaine and sodium polyacrylate composite modifier, ultrasonic 30-60min at a temperature of 50-70°C and a frequency of 50-60Hz to obtain a modified nano-titanium dioxide solution; then pass the modified nano-titanium dioxide solution through Filtration, drying, crushing, and sieving complete the modification of nano-titanium dioxide. The modified nano-titanium dioxide of the invention not only has good dispersibility, good stability and good compatibility with organic matter, but also improves the light resistance and weather resistance of the titanium dioxide. The method has the advantages of simple process, easy operation, low cost, high production efficiency and easy realization of industrialized production.

Description

technical field [0001] The invention relates to the technical field of modification of inorganic materials, in particular to a modification method of nano titanium dioxide. Background technique [0002] Nano-titanium dioxide is a new type of inorganic functional material, which is widely used in the fields of shielding ultraviolet rays, color-dependent coatings, photoelectric conversion, and photocatalysis. Titanium dioxide is an N-type semiconductor. When ultraviolet light with a wavelength of less than 400nm irradiates titanium dioxide, electrons in the valence band can absorb ultraviolet light and be excited to the conduction band, while generating electron-hole pairs, and some electron-hole pairs will migrate. to the surface, resulting in hydroxyl radicals and adsorbed water on the surface of titanium dioxide to generate hydroxyl radicals, which have a strong oxidizing ability and will oxidize and decompose the organic matter around them. Due to the small particle size ...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/04C09C3/10C09C3/08C08K9/04C08K3/22
CPCC09C1/3692C01P2004/64C08K3/22C08K9/04C08K2003/2241C09C3/006
Inventor 不公告发明人
Owner LIUZHOU BOZE SCI & TECH
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