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Preparation method of soluble titanium dioxide powder

A titanium dioxide, soluble technology, applied in the preparation of titanium dioxide powder, the field of preparation of soluble titanium dioxide powder, can solve the problems of large specific surface area, high surface free energy, limited stabilization time, etc., achieve uniform dispersion system, simple operation method, improve dispersion performance effect

Inactive Publication Date: 2013-08-21
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small size of nanoparticles, large specific surface area, high surface free energy, and easy agglomeration, their application in many fields is greatly limited.
[0004] Although titanium dioxide dispersions prepared by different methods have been reported in the literature, these dispersions are all liquid, have low solid content, and have limited stability time, which brings great inconvenience to storage and transportation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 10g of rutile titanium dioxide powder into 100ml of deionized water at room temperature, then dissolve 0.12g of polyethylene glycol 600 and 0.03g of sodium polyacrylate into the solution, add 0.05g of methyl silicone oil to fully dissolve and mix, and oscillate with a 650W ultrasonic machine 0.5 hours, then stirred at 1500r / min for 1 hour to obtain a white titanium dioxide dispersion; centrifuge the resulting white liquid at 3000r / min for 5min, and take the stable titanium dioxide dispersion in the upper layer; then dry the above dispersion with a freeze dryer to obtain titanium dioxide powder . When the prepared titanium dioxide powder is dissolved in water again, the maximum dispersion can reach 80%, and the stability time is more than 6 months.

Embodiment 2

[0022] Add 10g of rutile titanium dioxide powder into 100ml of deionized water at room temperature, then dissolve 0.04g of polyethylene glycol 200 and 0.02g of sodium polyacrylate into the solution, then add 0.05g of methyl silicone oil to fully dissolve and mix, and ultrasonically Oscillate for 0.5 hours, then stir at 1500r / min for 1 hour to obtain a white titanium dioxide dispersion; centrifuge the resulting white liquid at 2000r / min for 5 minutes, and take the upper stable titanium dioxide dispersion; then dry the above dispersion with a freeze dryer to obtain titanium dioxide powder. When the obtained titanium dioxide powder is dissolved in water again, the maximum dispersion can reach 50%, and the stability time is more than 6 months.

Embodiment 3

[0024] Add 10g of rutile titanium dioxide powder into 50ml of deionized water at room temperature, then dissolve 0.005g of polyethylene glycol 2000 and 0.005g of sodium polyacrylate in the solution, add 0.005g of methyl silicone oil to fully dissolve and mix, and then 250W ultrasonic Shake for 2 hours, then stir at 500r / min for 4 hours to obtain a white titanium dioxide dispersion; centrifuge the resulting white liquid at 1500r / min for 5 minutes, and take the upper stable titanium dioxide dispersion; then dry the above dispersion with a freeze dryer to obtain titanium dioxide powder. When the prepared titanium dioxide powder is dissolved in water again, the maximum dispersion can reach 20%, and the stability time is more than 6 months.

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PUM

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Abstract

The invention discloses a preparation method of soluble titanium dioxide powder. The preparation method comprises the steps of: adding titanium dioxide powder into deionized water with the mass ratio of 1: (5-40), and then adding a surfactant and an additive respectively, wherein the mass of the surfactant is 0.1-2 percent of the mass of the titanium dioxide powder, and the mass of the surfactant is 0.05-1 percent of the mass of the titanium dioxide powder; carrying out sonic oscillation on the proportioned raw materials for 0.5-2 hours by virtue of an ultrasonic machine with the power no less than 250 W; mixing the raw materials for 1-4 hours by virtue of a magnetic mixer with the rotational speed of 500-1500r / min to obtain a titanium dioxide dispersion liquid; placing the dispersion liquid into a centrifugal machine, carrying out centrifugation for 5 min with the rotational speed of 1500-3000r / min, separating out residues, and taking a stable upper layer titanium dioxide dispersion liquid; and drying the titanium dioxide dispersion liquid by virtue of a freeze dryer to obtain a fluffy titanium dioxide powder. The soluble titanium dioxide powder which is prepared by virtue of the preparation method can be well dispersed in water, the dispersity can reach 80 percent, the dispersion speed is rapid, the dispersion system is uniform, the stabilization time is long, and the condition is created for applying titanium dioxide in the field of environmental protection, sewage treatment and the like.

Description

technical field [0001] The present invention relates to a kind of preparation method of titanium dioxide powder, more specifically relate to a kind of preparation method of soluble titanium dioxide powder. The titanium dioxide powder prepared by the invention can be well dispersed in water, and has wide applications in environmental purification, sewage treatment and the like. The invention belongs to the technical field of chemical engineering and material preparation. Background technique [0002] Titanium dioxide came out in the late 1980s. It is an important inorganic material. It is widely used in Coatings, paper making, plastics, printing, chemical fiber, rubber, cosmetics, catalysts, antibacterial agents, sewage treatment and other industries. [0003] In the field of environmental protection, the use of photocatalytic oxidation technology to purify and optimize the environment has been widely concerned by researchers at home and abroad. Among them, nano-TiO 2 The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06
Inventor 杨统一
Owner JIANGSU UNIV OF SCI & TECH