Preparation method of neutral nano titanium dioxide hydrosol for functional fabric

A technology of nano-titanium dioxide and functional fabrics, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of no affinity for fibers, unstable dispersion, and difficult to fix fabrics, etc., and achieve low production costs and easy large-scale Large-scale production and easy operation

Inactive Publication Date: 2012-05-02
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the TiO2 reported in the literature at home and abroad 2 The low-temperature preparation of photocatalysts is generally made of nano-TiO 2 Powder, because most of the nano-titanium dioxide powder needs to be dispersed in water in the application of textile finishing, it will inevitably produce problems such as particle agglomeration and unstable dispersion; and the nano-titanium dioxide itself of the powder is harmful to the fiber No affinity, it is difficult to fix on the fabric, it is only fixed on the surface of the fabric by physical adsorption after padding, poor washability

Method used

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  • Preparation method of neutral nano titanium dioxide hydrosol for functional fabric
  • Preparation method of neutral nano titanium dioxide hydrosol for functional fabric
  • Preparation method of neutral nano titanium dioxide hydrosol for functional fabric

Examples

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Embodiment 1

[0035] Features: The degumming temperature is 20°C, 60°C, 90°C and stirred for 3 hours to prepare TiO 2 Sol.

[0036] In a water bath at 5°C, measure 6mL of TiCl 4 Add 50 mL of deionized water dropwise, stir during the dropping process, and control the dropping speed at the same time to ensure the complete hydrolysis reaction; stir for 1 hour to obtain a uniform transparent solution. Add a certain amount of sodium hydroxide solution to adjust the pH to about 7. After aging for a period of time, filter and fully wash with deionized water for 6-8 times to remove Cl in the solution -, take out the filter cake, add some deionized water, then add a certain amount of hydrochloric acid solution, control its concentration to be 5wt%, and adjust the pH to about 1.5. Then stirred at 20°C, 60°C, and 90°C for 3 hours to obtain transparent TiO with blue light 2 Sol. figure 1 TiO made at 20°C, 60°C, and 90°C for degumming temperature 2 In the XRD pattern, a is 20°C, b is 60°C, and c i...

Embodiment 2

[0038] Features: Nano-TiO made with non-ionic polyvinylpyrrolidone as modifier 2 Hydrosol.

[0039] In a water bath at 5°C, measure 6mL of TiCl 4 Add 50 mL of deionized water dropwise, stir during the dropping process, and control the dropping speed at the same time to ensure the complete hydrolysis reaction; stir for 1 hour to obtain a uniform transparent solution. Add a certain amount of sodium hydroxide solution to adjust the pH to about 7. After aging for a period of time, filter and wash 6-8 times with deionized water to fully remove the Cl in the solution - , take out the filter cake, add some deionized water, then add a certain amount of hydrochloric acid solution, adjust the pH to about 1.5, and control its concentration to be 30wt%. Then add a certain mass of polyvinylpyrrolidone and degumming at 60°C for 3 hours to obtain transparent TiO with blue light. 2 Sol. figure 2 XRD patterns of titanium dioxide modified by polyvinylpyrrolidone with concentrations of 0.5...

Embodiment 3

[0041] Features: Nano-TiO made with KH-550 as modifier 2 Hydrosol.

[0042] In a water bath at 5°C, measure 6mL of TiCl 4 Add 50 mL of deionized water dropwise, stir during the dropping process, and control the dropping speed at the same time to ensure the complete hydrolysis reaction; stir for 1 hour to obtain a uniform transparent solution. Add a certain amount of sodium hydroxide solution to adjust the pH to about 7. After aging for a period of time, filter and wash 6-8 times with deionized water to fully remove the Cl in the solution - , take out the filter cake, add some deionized water, and then add a certain amount of hydrochloric acid solution to adjust the pH to about 1.5. Then add a certain quality of KH-550 and degumming at 60°C for 3 hours to obtain transparent neutral TiO with blue light. 2 Sol. image 3 XRD pattern for titanium dioxide made with KH-550 at a concentration of 0.5%. At this time, the crystal form is anatase type, and the average grain size is ...

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Abstract

The invention relates to a preparation method of a neutral nano titanium dioxide hydrosol for a functional fabric, comprising the following steps: adding TiCl4 dropwisely in deionized water and hydrolyzing, then adding an alkaline solution, adjusting the pH value to neutral to obtain a suspension containing white precipitates, adding the obtained filter cake in deionized water, adjusting the pH value by using acids, then carrying out dispergation and adding a modifier or a dispersing agent to obtain the neutral transparent TiO2 hydrosol having a blue light. Compared with the prior art, the method has the advantages of wide resource of raw materials, simple process and convenient operation, and the prepared neutral nano titanium dioxide hydrosol has the advantages of uniform distribution of particles, good stability, and little or even no damage to fiber strength.

Description

technical field [0001] The invention belongs to the field of nanometer material science, and in particular relates to a preparation method of neutral nanometer titanium dioxide hydrosol used for functional fabrics. Background technique [0002] Due to its non-toxicity, stable performance, high photocatalytic activity, strong chemical corrosion resistance, non-selective degradation of organic matter in water pollutants, and no secondary pollution, nano-titanium dioxide has become a popular and widely used material nowadays. Foreground photocatalyst. It is widely used in environmental protection fields such as gas purification, treatment of organic pollutants, antibacterial deodorization, anti-fog and self-cleaning coatings. [0003] The preparation methods of nano-titanium dioxide can be classified into three categories: solid-phase method, gas-phase method and liquid-phase method. Various preparation methods have their advantages and disadvantages. The process used in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y40/00
Inventor 沈勇张惠芳王黎明丁颖刘紫薇白林翠王晓娟颜峰杨艳
Owner SHANGHAI UNIV OF ENG SCI
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