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Method for preparing zirconia hollow film by microfluidic control

A zirconium dioxide and microfluidic system technology is applied in the field of preparation of ceramic films to achieve the effects of uniform distribution, high synthesis efficiency and uniform film thickness

Active Publication Date: 2022-06-17
THE UNIV OF NOTTINGHAM NINGBO CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] And how to prepare ZrO by microfluidic method 2 Ceramic thin films have not been reported yet

Method used

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  • Method for preparing zirconia hollow film by microfluidic control
  • Method for preparing zirconia hollow film by microfluidic control
  • Method for preparing zirconia hollow film by microfluidic control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Steps include:

[0040] (1) Material preparation

[0041] External phase: surfactant Span 80 (1.5wt%), 0.25vol% tetramethyldiethylamine (TMEDA) is added in the silicone oil; Above-mentioned Span 80 and tetramethyldiethylamine are the final concentrations in the silicone oil ;

[0042] Intermediate phase: zirconium sol precursor: zirconium gel precursor is composed of 2.5mol / L zirconium oxychloride (ZrOCl 2 ) aqueous solution, 4.5mol / L urea (CON 2 H 4 ), 0.8mol / L citric acid (C 6 H 8 O, ), 10wt% polyethylene (PVA) was mixed in a volume ratio of 2:3:0.8:1.5, followed by adding 2.66g of yttrium nitrate (Y(NO) 3 ) 3 ·6H 2 O), the mixture was heated to 90 °C and slowly stirred to 30 mL; then 0.10 μmol / L pH probe-carboxyfluorescein 2',7'-bis(2-carboxyethyl)-5(6)-carboxyfluorescein (BCECF) was added to the sol in the composition;

[0043] Internal phase: 60g molten paraffin (melting point 27°C);

[0044] (2) Preparation of gel film

[0045] Use a syringe pump to pa...

Embodiment 2

[0054] Steps include:

[0055] (1) Material preparation

[0056] External phase: silicone oil and surfactant Span 80 (1wt%), 0.125vol% tetramethyldiethylamine (TMEDA) is added in the silicone oil;

[0057] Intermediate phase: zirconium sol precursor: zirconium gel precursor is composed of 2mol / L zirconium oxychloride (ZrOCl 2 ) aqueous solution, 4mol / L urea (CON 2 H 4 ), 0.5mol / L citric acid (C 6 H 8 O), 8wt% polyethylene (PVA) were mixed in a volume ratio of 2:3:0.8:1.5, followed by adding 1.33g of yttrium nitrate (Y(NO) 3 ) 3 ·6H 2 O), the mixture was heated to 90 °C and slowly stirred to 22 mL; then 0.09 μmol / L pH probe-carboxyfluorescein 2',7'-bis(2-carboxyethyl)-5(6)-carboxyfluorescein (BCECF) was added to the sol constitute;

[0058] Internal phase: 50g molten paraffin (melting point 27°C);

[0059] (2) Preparation of gel film

[0060] Use a syringe pump to pass the material into the channels of the microfluidic system described in the appendix. figure 1 As s...

Embodiment 3

[0069] Steps include:

[0070] (1) Material preparation

[0071] External phase: 2wt% surfactant Span 80, 0.25vol% tetramethyldiethylamine (TMEDA) is added in the silicone oil; Above-mentioned Span 80 and tetramethyldiethylamine are the final concentrations in the silicone oil;

[0072] Intermediate phase: zirconium sol precursor: zirconium gel precursor is composed of 2.5mol / L zirconium oxychloride (ZrOCl 2 ) aqueous solution, 4.5mol / L urea (CON 2 H 4 ), 0.8mol / L citric acid (C 6 H 8 O, ), 10wt% polyethylene (PVA) was mixed in a volume ratio of 2:3:0.8:1.5, followed by adding 2.66g of yttrium nitrate (Y(NO) 3 ) 3 ·6H 2 O), the mixture was heated to 90 °C and slowly stirred to 30 mL; then 0.10 μmol / L pH probe-carboxyfluorescein 2',7'-bis(2-carboxyethyl)-5(6)-carboxyfluorescein (BCECF) was added to the sol in the composition;

[0073] Internal phase: 58g molten paraffin (melting point 27°C);

[0074] (2) Preparation of gel film

[0075] Use a syringe pump to pass mat...

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Abstract

A method for preparing a hollow zirconia thin film by microfluidics, characterized in that: the steps of the method include: firstly prepare the material, that is, first prepare the ZrO2 2 Raw materials for ceramic thin films, followed by the preparation of ZrO by a microfluidic system 2 Gel film, obtained by ZrO 2 The gel membrane is sintered to obtain the target product. The application has the advantages that the microporous structure can be applied to fields such as filtration and purification, the thickness of the film is uniform, and it is easy to peel off from the substrate.

Description

technical field [0001] The present application relates to the technical field of preparation of ceramic thin films, in particular to a method for preparing zirconia hollow thin films by microfluidic control. Background technique [0002] ZrO 2 Ceramic film is a kind of ceramic material with excellent thermal, chemical and mechanical stability, low friction coefficient and good wear resistance. At present, the main preparation technologies of zirconia ceramic thin films include sputtering deposition, vapor deposition, sol-gel method, plasma spraying, etc. However, the above method may have problems such as rough surface, different thickness, lack of stability or high cost, long preparation time and unfavorable industrial production during the preparation process. ZrO 2 Ceramic films are expected to be used as wear-resistant or protective coatings in harsh environments, so ZrO 2 The study of thin films has attracted extensive attention from scholars from all over the world...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B38/06
Inventor 任勇王成波王静连政
Owner THE UNIV OF NOTTINGHAM NINGBO CHINA
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