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Method for preparing nanofluid-based titanium dioxide film

A nano-titanium dioxide and nano-fluid technology, which is applied in the field of thin film material preparation, can solve the problems of harsh reaction conditions, secondary pollution, limited application conditions, etc., and achieve the effects of high repeatability, stable structure, and rapid film formation at room temperature.

Inactive Publication Date: 2019-02-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these methods have problems such as harsh reaction conditions or secondary pollution, and the synthesized titanium dioxide films generally use TiO 2 Photocatalytic properties make the surface super-hydrophilic, and the applicable conditions are limited. It can only be hydrophilic when there is light outdoors or when there is an additional light source indoors.

Method used

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  • Method for preparing nanofluid-based titanium dioxide film
  • Method for preparing nanofluid-based titanium dioxide film
  • Method for preparing nanofluid-based titanium dioxide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Add urea with a molar ratio of 1:1 to 0.5M Ti(SO 4 ) 2 In the aqueous solution, stir until the urea is completely dissolved, then add the solution into an autoclave with a filling degree of 80%, and keep the temperature at 180°C under hydrothermal conditions for 6 hours. The obtained product was repeatedly washed with deionized water until the filtrate was neutral, and finally dried at 80°C for 8 hours to obtain the product;

[0040] (2) Add 3 g of the above product into 25 mL of deionized water, ultrasonically disperse for 30 min, add 8 drops of aqueous sodium hydroxide solution (mass fraction 10%), and stir evenly for 7 days;

[0041] (3) Add 7 mL of DC5700 (CH 3 O) 3 Si(CH 2 ) 3 N + (CH 3 ) 2 (C 18 h 37 )Cl - 40% methanol solution and 3mL KH550 (NH 2 (CH 2 ) 3 Si(OC 2 h 5 ) 3 ), after the white precipitate appeared, stop stirring, let it stand for 12 hours, wash with deionized water and centrifuge, repeat the cleaning and centrifugation process a...

Embodiment 2

[0045] (1) Add urea with a molar ratio of 1:1 to 0.5M Ti(SO 4 ) 2 In the aqueous solution, stir until the urea is completely dissolved, then add the solution into an autoclave with a filling degree of 80%, and keep the temperature at 180°C under hydrothermal conditions for 6 hours. The obtained product was repeatedly washed with deionized water until the filtrate was neutral, and finally dried at 80°C for 8 hours to obtain the product;

[0046] (2) Add 1.5 g of the above product into 25 mL of deionized water, ultrasonically disperse for 30 min, add 8 drops of aqueous sodium hydroxide solution (mass fraction 10%), and stir evenly for 7 days;

[0047] (3) Add 7mL DC5700 (40% methanol solution) and 1.5mL KH550 dropwise to the reaction solution obtained in (2). After white precipitate appears, stop stirring, let stand for 12h, wash with deionized water and centrifuge, repeat Washing and centrifuging at least three times, and then drying at 70°C, the hydrophobic titanium dioxide ...

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Abstract

The invention provides a method for preparing a nanofluid-based titanium dioxide film. The method comprises the following steps: taking a long chain polymer as a modifier, constructing an organic shell layer on the surface of titanium dioxide nanoparticles subjected to rich hydroxylation treatment so as to form titanium dioxide nanofluid, and forming the nano titanium dioxide film by virtue of condensation polymerization of the organic shell layer on the particle surface. The preparation method disclosed by the invention has the advantages that the preparation method is rapid, simple, high inrepeatability and capable of realizing rapid room-temperature film formation, can control the hydrophilic and hydrophobic properties of the film by regulating the shell layer composition, and has hugeapplication potential in the field of anti-ultraviolet coatings.

Description

technical field [0001] The invention relates to the technical field of thin film material preparation, in particular to a method for preparing a titanium dioxide thin film based on nanofluid. Background technique [0002] Although there are many existing synthesis methods of titanium dioxide thin films, the industrial production methods are mainly chemical vapor deposition (CVD), sol-gel high-temperature sintering (Sol-Gel), magnetron sputtering and room temperature curing. Most of these methods have problems such as harsh reaction conditions or secondary pollution, and the titanium dioxide films synthesized generally use TiO 2 Photocatalytic properties make the surface super-hydrophilic, and the applicable conditions are limited. It can only be hydrophilic when there is light outdoors or when there is an additional light source device indoors. [0003] The use of solvent-free reactions is an important research direction to avoid the use of volatile organic solvents, and it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/73C08G18/38
CPCC08G18/3895C08G18/73
Inventor 阳晓宇胡洁张凌瑞石鑫李元洲原帅苏宝连
Owner WUHAN UNIV OF TECH
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