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Super-hydrophobic fluorocarbon chain modified titanium dioxide as well as preparation method and application thereof

A super-hydrophobic, fluorocarbon chain technology, applied in titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as poor super-hydrophobic effect, and achieve high product yield, simple steps, good product The effect of the application foreground

Pending Publication Date: 2022-04-15
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the invention is to provide a superhydrophobic fluorocarbon chain modified TiO 2 Nanoparticles and their preparation methods and applications solve the problem of most organic modified TiO 2 The problem of poor superhydrophobic effect

Method used

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  • Super-hydrophobic fluorocarbon chain modified titanium dioxide as well as preparation method and application thereof
  • Super-hydrophobic fluorocarbon chain modified titanium dioxide as well as preparation method and application thereof
  • Super-hydrophobic fluorocarbon chain modified titanium dioxide as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Fluorocarbon chain modified TiO 2 nanoparticles

[0027] Take 10ml of titanium tetrachloride and 30ml of ice water with a graduated cylinder. At room temperature and stirring at a speed of 700r / min, add 10ml (0.09mol) of titanium tetrachloride dropwise to 30ml of ice water at a rate of 2s / drop in a beaker, and then add hexafluoroepoxide dropwise at a rate of 2s / drop. Propane dimer 28.5g (0.09mol), after stirring at 700r / min for 60min, the reaction solution was transferred to a stainless steel reactor and heated to 100°C for 3h reaction. 2-tetrafluoroethyl-2,2,2-trifluoroethyl ether) and deionized water were washed 5 times to remove chloride ions on the surface, and the chloride ion content detector (model TDCL-225, manufacturer Beijing Tiandi Shouhe Technology) Development Co., Ltd.) after measuring the concentration of chloride ions in the washing solution to be 15ppm, centrifuge with a centrifuge at a speed of 7000r / min, dry the resulting solid at 120°C for 18h, ...

Embodiment 2

[0040] Take 3ml of tetrabutyl titanate and 3ml of ice water with a graduated cylinder. Under the condition of stirring at room temperature and rotating speed of 500r / min, add 3ml (0.009mol) tetrabutyl titanate dropwise to 10ml ice water at a speed of 3s / drop in a beaker, and then add difluoroacetic acid dropwise at a speed of 3s / drop 3.5g (0.036mol), stirred at 500r / min for 60min, the reaction solution was transferred to a stainless steel reactor and heated to 150°C for 2h, after taking it out, use hydrofluoroether HFE-6512 (1H, 1H, 5H-octafluoropentyl -1,1,2,2-tetrafluoroethyl ether) and deionized water for 5 times to remove impurities on the surface, the chloride ion concentration measured by a chloride ion content detector is 16ppm, and the centrifuge is used at a speed of 5000r / min Centrifuge, dry the resulting solid at 80°C for 24 hours, and grind it with an agate mortar for 30 minutes to obtain 1.4 g of white fluorocarbon chain-modified TiO 2 Nano particle powder, the m...

Embodiment 3

[0043] Take 10ml of titanium tetrachloride and 20ml of ice water with a graduated cylinder. At room temperature and stirring at a speed of 600r / min, add 10ml (0.09mol) of titanium tetrachloride dropwise to 25ml of ice water at a rate of 4 s / drop in a beaker, and then add 2,2-dichloride at a rate of 4 s / drop. Fluoropropionic acid 17.3g (0.18mol), after stirring at 600r / min for 60min, the reaction solution was transferred to a stainless steel reactor and heated to 80°C for 8h, and after taking it out, it was washed 6 times with hydrofluoroether HFE-6512 and deionized water to remove Impurities on the surface, after the chlorine ion concentration is measured to be 12ppm by a chloride ion content analyzer, centrifuge at a speed of 7000r / min with a centrifuge, dry the resulting solid at 150°C for 20h, and grind it with an agate mortar for 30min to obtain 15.7g of white Fluorocarbon chain modified TiO 2 Nano particle powder, the mass yield is 96.6%.

[0044] Using the method of Ex...

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Abstract

The invention discloses super-hydrophobic fluorocarbon chain modified titanium dioxide and a preparation method and application thereof.The preparation method comprises the steps that under the room temperature and stirring conditions, a titanium source compound is slowly and dropwise added into ice water, then a fluorine source compound is added, the mixture is stirred and mixed to be uniform at the room temperature, the mixture is stirred and reacted for 1-8 h at the temperature of 80-150 DEG C, and the super-hydrophobic fluorocarbon chain modified titanium dioxide is obtained; and respectively washing the reaction solution with hydrofluoroether and deionized water until the content of chloride ions in the washing solution is less than 20 ppm, centrifuging, precipitating and drying to obtain the fluorocarbon chain modified TiO2 nanoparticles. The steps for preparing the super-hydrophobic fluorocarbon chain modified TiO2 nanoparticles are simple, and the product yield is high (as high as 95% or above); the prepared fluorocarbon chain modified TiO2 nano-particles have super-hydrophobicity, not only have good application prospects in the aspects of self-cleaning and oil-water separation, but also have good application prospects in the aspect of preparation of fluorinated liquid nano-fluids.

Description

(1) Technical field [0001] The invention relates to the field of preparation of hydrophobic materials, in particular to a superhydrophobic fluorocarbon chain modified TiO 2 Nanoparticles and their preparation methods and applications. (2) Background technology [0002] Titanium dioxide is an important multifunctional inorganic functional material, which is widely used in many fields because of its good transparency, high whiteness and brightness, safety and non-toxicity. However, unmodified titanium dioxide has a large specific surface area and high surface energy, and exhibits strong polarity and hydrophilic and oleophobic properties, which lead to its easy aggregation and precipitation in organic systems, which seriously affects its performance. Therefore, it needs to be modified to improve the compatibility, dispersion and hydrophobicity of titanium dioxide in the medium. [0003] Fluorinated liquid cooling media (hydrofluorocarbons HFCs, hydrofluoroethers HFEs, perfluo...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J20/06B01J20/22B01D17/022B01D17/02C09K5/10B82Y30/00B82Y40/00C09C1/00C01G23/047
Inventor 陈爱民陶澄钰刘鹏榕陈亚军李信唐浩东韩文锋
Owner ZHEJIANG UNIV OF TECH
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