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A kind of modified titanium dioxide and preparation method thereof

A technology of titanium dioxide and silicon dioxide, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., to achieve the effects of good mechanical properties, good whiteness, and increased light absorption capacity

Inactive Publication Date: 2021-07-06
封丽娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to further improve the self-cleaning performance while ensuring the whiteness of titanium dioxide is a difficult point in related research.

Method used

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  • A kind of modified titanium dioxide and preparation method thereof
  • A kind of modified titanium dioxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0048] In this experimental example, the method of coating chromium with titanium dioxide is explored.

[0049] The commonly used chromium coating method in this field is as follows: take TiO by mass ratio 9:1 2 and Cr 2 o 3 , mix the two, put them into a planetary ball mill for ball milling for 4 hours, dry for 12 hours, take out the powder, put it in a muffle furnace, and keep it warm at 1000°C for 70 hours to obtain Cr-coated 2 o 3 TiO 2 . According to this method, the experiment was performed 5 times in parallel.

[0050] In this experiment, the following steps were used to treat TiO 2 Carry out Cr 2 o 3 Coating of titanium dioxide particles: Disperse titanium dioxide particles in a sufficient amount of ethanol, ultrasonically treat at a frequency of 40KHz for 15min, and add Cr at a ratio of 0.04mmol per g of titanium dioxide particles 3 O(O 2 CCH 3 ) 7H 2 O, form a suspension, heat to 90°C; take a sufficient amount of purified water, add HCl to adjust the pH t...

experiment example 2

[0056] In the coating process of the present invention, a coating device is used. The cladding equipment consists of a linear motor driver 1 , a glass plate 2 , a coater 3 , and a heating plate 4 . The connecting arm 11 is fixedly connected with the coater 3 and can move in the moving groove 13 driven by the motor, so as to push the coater 3 to move on the glass plate 2 . The height of the gap 31 between the coater 3 and the glass plate 2 is 5-30 μm, preferably 15 μm, and the size of the gap 31 can be controlled by adjusting the height of the coating roller 32 . The linear motor driver 1 is provided with a glass plate support 12 for supporting the glass plate 3 , and a heating plate 4 is fixedly arranged under the glass plate 3 .

[0057] Weigh the coated Cr 2 o 3 TiO 2 500g, and 500g of industrial titanium dioxide, dispersed in 1L of DMCPSI, stirred evenly, added 100g of OPMC, mixed evenly, to obtain suspension 5.

[0058] Take a certain amount of suspension 5, put it o...

experiment example 3

[0071] This experiment explores the pretreatment of titanium dioxide, which is coated with Cr 2 o 3 Outer effects. Coated Cr 2 o 3 The method is as described in Experimental Example 2.

[0072] Scheme a: (1) Weigh the coated Cr 2 o 3 500g of titanium dioxide and 1kg of industrial titanium dioxide were dispersed in 1L of DMCPSI, stirred evenly, and 100g of OPMC was added, mixed evenly to obtain a suspension. Take a certain amount of suspension, put it on the glass plate of the coating equipment, start the linear motor drive, and push the coater to move at a constant speed on the glass plate through the conduction of the connecting arm. The gap between the coater and the glass plate was 15 μm, and the moving speed of the coater on the glass plate was 0.02 m / s. When the suspension is observed to spread evenly on the glass plate, turn on the heating plate and adjust the temperature to 35°C. Then control the linear motor driver to move in the opposite direction until the st...

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Abstract

The invention provides a modified titanium dioxide applied in mortar and a preparation method thereof. The preparation method comprises the following steps: (1) pretreating the industrial titanium dioxide raw material; (2) treating the TiO2 obtained in step (1) 2 Carry out pore-making treatment; (3) step (2) will cover a layer of TiO with the silicon dioxide core outer layer 2 (4) step (3) is obtained TiO 2 The outer layer is covered with a layer of Cr 2 o 3 (5) the titanium dioxide outer layer that step (4) obtains coats one deck TiO 2 . The titanium dioxide finished product prepared by the invention has the characteristics of good mechanical strength, strong photocatalytic activity and the like, and can effectively prevent the coating of the mortar from being polluted when applied to the mortar.

Description

technical field [0001] The invention belongs to the field of industrial titanium dioxide, and in particular relates to a titanium dioxide used in lime mortar. Background technique [0002] Titanium dioxide is considered to be a white pigment with the best performance in the world. It has high hiding power, weather resistance, color-removing power, etc. It is widely used in coatings, plastics, papermaking, printing inks, chemical fibers, rubber, ceramics, cosmetics, Fine chemical industries such as food and medicine. [0003] In previous studies, it was found that titanium dioxide has strong photocatalytic properties, such as air purification, wastewater treatment, etc. (nano TiO 2 Preparation and photocatalytic performance research, Li Yidong, etc.). And when titanium dioxide is used in coatings, or as additives such as food and medicine, its strong photocatalytic activity will have an adverse effect on the performance of the product, and it is necessary to coat titanium d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B20/10C01G23/047
CPCC01G23/08C04B20/1007C04B14/06C04B14/305C04B14/307
Inventor 封丽娟
Owner 封丽娟