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Method for improving surface hydrophilicity of medical titanium or titanium alloy

A titanium alloy and hydrophilic technology, applied in the coating process of metal materials, etc., can solve the problems of superhydrophilic attenuation, harsh preparation conditions, unfavorable industrial applications, etc., achieve reliable performance, stable process, and improve surface hydrophilicity sexual effect

Inactive Publication Date: 2010-11-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium dioxide nanotubes, nanorods, nanosheets and other nanostructures can be prepared on the surface of titanium by chemical and electrochemical methods to obtain superhydrophilicity, but the preparation conditions of these methods are relatively harsh, which is not conducive to industrial applications
Ultraviolet irradiation is an effective method to improve the hydrophilicity of titanium dioxide, but the superhydrophilicity obtained by this method will decay with prolonged storage time

Method used

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  • Method for improving surface hydrophilicity of medical titanium or titanium alloy
  • Method for improving surface hydrophilicity of medical titanium or titanium alloy
  • Method for improving surface hydrophilicity of medical titanium or titanium alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Put 10×10×1.2mm 3 The pure titanium sheet was polished step by step with sandpaper to No. 1500, polished, ultrasonically cleaned with acetone, ethanol and deionized water for 5 minutes, and then dried. Prepare a 1.0M NaOH solution, and treat the pure titanium sample under airtight and 60°C water bath conditions for 24 hours, forming a nanoporous network sodium titanate hydrogel layer on the surface. After the reaction, the sample was taken out and washed with deionized water more than 3 times. Put the sample treated with lye into 0.1M dilute hydrochloric acid solution, let it stand at room temperature for 12 hours, take out the sample, wash and dry it. The surface of the sample is nanoporous network morphology, the scanning electron microscope picture is as follows figure 1 a, Its composition is titanium dioxide hydrogel. The contact angle of the sample to deionized water measured by a JY-82 contact angle measuring instrument is 10°, which is far lower than the conta...

Embodiment 1-1

[0019] Heat the sample treated with dilute hydrochloric acid in a resistance furnace at a temperature of 600°C for 0.5 hours. The surface of the sample still maintains a nanoporous morphology, as shown in the scanning electron microscope figure 1 b. The contact angle of the sample surface to deionized water is 3°, showing superhydrophilicity. After the sample is stored in the air, the contact angle will increase, and it can rise to more than 120° after 2 weeks.

Embodiment 1-2

[0021] The sample treated with dilute hydrochloric acid is directly irradiated with ultraviolet rays for 3 hours. The central wavelength of ultraviolet light is 253nm, and the contact angle can be reduced to below 5°.

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Abstract

The invention relates to a method for improving the surface hydrophilicity of medical titanium or a titanium alloy, which is characterized by comprising the following steps of: placing the titanium or the titanium alloy in 1.0-5.0 M of NaOH solution and then treating 12-24 hours at 60-80 DEG C to form a nano porous sodium titanate gel layer on the surface; and then soaking the alkali liquor-treated sample in 0.1 M of diluted hydrochloric acid for 12 hours at the room temperature to transform the nano porous sodium titanate gel layer into a nano porous titanium oxide gel layer. The titanium oxide gel layer can be crystallized by thermally treating 0.5-2.0 hours at 500-600 DEG C. After a nano porous titanium oxide film is irradiated for 3-4 hours by ultraviolet rays (the wavelength is 253 nm) or is treated for 2-4 minutes by atmosphere plasmas, the superhydrophilicity can be obtained, and the high hydrophilicity of the superhydrophilic sample can be maintained after the superhydrophilic sample is preserved in deionized water. When used for improving the surface hydrophilicity of the medical titanium or the titanium alloy, the method has the characteristics of simple and easy feasibility, stable process, reliable performance, firm combination of a titanium dioxide layer, suitability for various titanium alloys and the like.

Description

technical field [0001] The invention relates to a method for improving the surface hydrophilicity of medical titanium or titanium alloy, in particular to a method for in-situ preparing a nanoporous structure on the surface of titanium or titanium alloy to obtain high hydrophilicity and superhydrophilicity. Background technique [0002] Pure titanium and titanium alloys are widely used in the manufacture of various implantable medical devices and devices such as dentistry, orthopedics, orthopedics, and cardiovascular. Surface hydrophilicity has an important influence on the biocompatibility of implanted materials. The hydrophilicity and free energy of the material surface are closely related to the adsorption and denaturation of blood components. A hydrophilic surface reduces platelet adhesion, thereby reducing thrombus formation. In order to further improve the biocompatibility of medical titanium or titanium alloy, it is necessary to carry out hydrophilic treatment on its ...

Claims

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Application Information

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IPC IPC(8): C23C22/64C23C22/83
Inventor 付涛
Owner XI AN JIAOTONG UNIV
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