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Method for preparing mesoporous titanium oxide film loaded on substrate

A mesoporous titanium oxide and substrate technology, applied in the coating process and coating of metal materials, can solve the problems of reduced biocompatibility, easy cracks on the surface, difficult removal of template agents, etc., to increase heat flux Quantity transfer, good biocompatibility, favorable effect of fluid flow

Inactive Publication Date: 2012-07-04
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some unavoidable problems, such as: prone to cracks on the surface, insufficient film strength, poor adhesion to the substrate, irregular and controllable pore structure, poor pore connectivity, low crystallinity, difficult removal of templates, biophase

Method used

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  • Method for preparing mesoporous titanium oxide film loaded on substrate
  • Method for preparing mesoporous titanium oxide film loaded on substrate
  • Method for preparing mesoporous titanium oxide film loaded on substrate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1:

[0027] ① Measure 14.7mL tetrabutyl titanate (Ti(OC 4 h 9 ) 4 ) was added to the dissolved potassium acetate (CH 3 COOK) in 34.4mL glacial acetic acid (CH 3 COOH) solution in the wide-mouth bottle, the specific ratio according to TiO2 : K 2 CO 3 (mol)=2:1. Measure 2.57mL acetylacetone (CH 3 COCH 2 COCH 3 ), 2.2mL ethylene glycol methyl ether (CH 3 COCH 2 COCH 3 ) was slowly added to the above solution, stirred for 2-3 hours, and left to age for 3 days to obtain a sol [12].

[0028] ② Surface hydroxylation treatment of the titanium substrate: ultrasonic cleaning with deionized water for 15 minutes, then ultrasonic cleaning with ethanol for 15 minutes, then rinsing the substrate with deionized water for 3 times, each time for 5 minutes, and then repeating the ethanol cleaning step 5 times, and then Ultrasonic wash with acetone for 8 minutes, then rinse the substrate with deionized water for 3 times, 5 minutes each time, repeat the acetone cleaning...

Example Embodiment

[0031] Example 2:

[0032] ①Measure 14.7mL tetrabutyl titanate and add it into a jar of 20mL glacial acetic acid solution dissolved in potassium acetate under stirring state, the specific proportion is according to TiO 2 : K 2 CO 3 (mol)=4:1. Measure 2.5mL of acetylacetone and 36mL of ethylene glycol methyl ether into the above solution slowly, stir for 2 to 3 hours, and leave to age for 10 days to obtain a sol.

[0033] ② Immerse the titanium substrate after surface hydroxylation (the surface hydroxylation is carried out as in Example 1) into the above-mentioned sol that has been left to stand and age and pull it up. The product obtained after drying at 150°C for 10 minutes to obtain a polycrystalline form, and then Repeat the pulling process until a thin film with a thickness of 500 nm and regular morphology is obtained.

[0034] ③ The obtained film was baked at 350°C for 8 hours in an air atmosphere, then kept in a hydrothermal kettle at 150°C for 12 hours in a saturate...

Example Embodiment

[0036] Example 3:

[0037] ① Measure 14.7mL tetrabutyl titanate and add it into a jar of 24.4mL glacial acetic acid solution dissolved in potassium acetate under stirring state, the specific proportion is according to TiO 2 : K 2 CO 3 (mol)=6:1. Measure 2.5 mL of acetylacetone and 31.5 mL of ethylene glycol methyl ether into the above solution slowly, stir for 2 to 3 hours, and leave to age for 6 days to obtain a sol.

[0038] ② Immerse the titanium substrate after surface hydroxylation (the surface hydroxylation is carried out as in Example 1) into the above-mentioned sol that has been left to stand and age and pull it up. The product obtained after drying at 300°C for 15 minutes to obtain a polycrystalline form, and then Repeat the pulling process until a thin film with a thickness of 500 nm and regular morphology is obtained.

[0039] ③ The obtained film was baked at 500°C for 8 hours in an air atmosphere, and then kept in a saturated calcium chloride aqueous solution i...

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Abstract

The invention discloses a method for preparing a mesoporous titanium oxide film loaded on a substrate. The method comprises the following steps of: preparing a titanium-containing compound and potassium salt or sodium salt into sol, standing and ageing; coating the sold on a surface hydroxylated substrate material by using a sol-gel dip-coating method to obtain a film in a polycrystalline form; performing primary roasting on the obtained film, reacting at the temperature of between 5 and 200DEG C in a hydrothermal reactor in the atmosphere of wet gas with the humidity of 1-50 percent, and cleaning by using water or an acidic solution after reaction; and performing secondary roasting to obtain the mesoporous titanium oxide film. The prepared film has high heat flux, and the heat transfer flux is dozens of times that of the traditional heat exchanger; and by combining the surface of the film with low friction coefficient, the film is favorable for a fluid to flow to transfer heat, the heat exchange property is improved, and the film has great application prospect in the fields such as biomedical materials, heat exchangers and the like.

Description

technical field [0001] The invention belongs to the technical field of heat exchange and biomaterials, relates to membrane preparation technology, in particular to a method for preparing a mesoporous titanium oxide membrane loaded on a substrate. Background technique [0002] Titanium and titanium alloys are resistant to corrosion, high and low temperature, high strength, hardness, and low density. They play a pivotal role in the petrochemical industry and are widely used to manufacture heat exchangers and reactors in the production process of acetaldehyde. . In addition, titanium and titanium alloys have excellent biocompatibility and are also widely used in the field of biomedical materials, such as artificial joints, heart valves, dental instruments [1], etc. Even in the fields of navigation and aviation, it is widely used due to the excellent characteristics of its materials. The surface of titanium is covered by natural dense titanium oxide film[2]. These natural dens...

Claims

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Application Information

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IPC IPC(8): C23C26/00
Inventor 陆小华安蓉刘畅冀超杨祝红付双钦王昌松
Owner NANJING UNIV OF TECH
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