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Method for improving biological activity of titanium nitride ceramic coating by ozone treatment

A bioactive technology of titanium nitride ceramics, applied in coatings, medical science, prostheses, etc., can solve the problem of reducing the hardness or wear resistance of titanium nitride ceramics, changing the color of titanium nitride ceramics, and not suitable for preclinical treatment To achieve the effect of maintaining color, high hardness, improving biocompatibility and bioactivity

Active Publication Date: 2015-03-04
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In summary, currently known modification methods for improving the biological activity of titanium nitride ceramics mainly have the following disadvantages: (1) high temperature operation, high energy consumption, complex equipment, and high safety performance requirements; (2) significantly reducing the nitriding Titanium ceramic hardness or wear resistance; (3) poor working environment, not suitable for preclinical treatment in hospitals, clinics, etc.; (4) will change the color of titanium nitride ceramics

Method used

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  • Method for improving biological activity of titanium nitride ceramic coating by ozone treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] First, a titanium nitride ceramic layer is prepared on the surface of a disc-shaped pure titanium metal by gas nitriding method. The ceramic layer is golden yellow, the microhardness is HV1131.2 (±78.3), and the contact angle of distilled water on its surface is 70.1° . Secondly, the samples with titanium nitride ceramic coating can be ultrasonically cleaned and dried naturally. Next, put the sample into a fully cleaned and dried quartz tube. The quartz tube is placed horizontally, and silicon rubber plugs with reserved gas path holes are installed at both ends of the quartz tube. One end is connected to the ozone generator, and the other end is connected to the Ozone tail gas treatment device. After connecting the gas path, adjust the heating device to heat the quartz tube, and control the reaction temperature at 30°C. Introduce the gas generated by the oxygen source ozone generator, wherein the concentration of ozone is 10mg / L, the working pressure is maintained at ...

Embodiment 2

[0023] The treatment method is basically the same as in Example 1, except that the heating temperature is controlled at 100° C., the concentration of ozone is 20 mg / L, and the continuous gas supply time is 2 hours.

[0024] After treatment, the obtained sample is still golden yellow; the microhardness of the coating is HV1114.3 (±63.6), and there is no statistical difference compared with the untreated sample; while maintaining good wear resistance; the contact angle of distilled water is 0 °, significantly decreased compared with before treatment, which shows that the surface wettability of the titanium nitride ceramic layer treated by the method of the present invention is very good; the scanning electron microscope observation results show that the surface morphology of the sample treated with ozone does not occur. Variety.

Embodiment 3

[0033] The treatment method is basically the same as in Example 1, except that the heating temperature is controlled at 100° C., the concentration of ozone is 30 mg / L, and the continuous gas supply time is 1 hour.

[0034] After treatment, the obtained sample is still golden yellow; the microhardness of the coating is HV1164.2 (±49.27), which has no statistical difference compared with the untreated sample; while maintaining good wear resistance; the contact angle of distilled water is 5 °, and greatly decreased before the treatment, which shows that the surface wettability of the titanium nitride ceramic layer after the treatment of the method of the present invention is very good; the scanning electron microscope observation results show that the surface morphology of the sample treated with ozone has not changed.

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Abstract

The invention discloses a method for improving the biological activity of a titanium nitride ceramic coating by ozone treatment. The method comprises the following steps: loading a sample with the titanium nitride ceramic coating into an inorganic tube; heating the inorganic tube till the temperature is 30-150 DEG C; charging ozone, wherein the concentration of the ozone is 10-30 mg / L, the working pressure intensity is 0.1 MPa, and the gas supply time is 0.5-6 hours; after reaction is completed, taking the sample out, and storing the sample in a sealed utensil made of an inorganic material. The method has the advantages that the surface of the titanium nitride ceramic coating is decontaminated and oxidized by utilizing the ozone, and the color, the microstructure, the hardness and the wear resistance of the titanium nitride ceramic coating are kept; meanwhile, the wetting performance of the surface of the titanium nitride ceramic coating is further obviously improved, so that interaction between cells and implant materials is improved, and bone cells can be more quickly attached, spread, proliferated and differentiated on the surface of an implant body. Therefore, the biocompatibility and the biological activity of the titanium nitride ceramic coating can be improved by virtue of an ozone treatment method provided by the invention.

Description

technical field [0001] The invention relates to a method for improving the biological activity of titanium nitride, which belongs to the technical field of surgical implants. Background technique [0002] At present, titanium nitride ceramic coatings have high hardness, strong chemical stability, low friction coefficient, and excellent biocompatibility, so they have been widely used in the field of medical devices, such as implant abutment coating, Artificial joint metal ball head coating, etc. However, the biological activity of titanium nitride is only comparable to that of titanium alloys, such as Ti6Al4V, and still inferior to that of pure titanium. If the bioactivity can be improved while retaining high hardness, the TiN ceramic layer would be an ideal coating material for implants. At present, there are not many reports on improving the bioactivity of titanium nitride ceramics, and the following two literatures have been consulted. Document 1 (Microstructure and bio...

Claims

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Application Information

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IPC IPC(8): A61L27/30A61L27/50
Inventor 史兴岭徐玲利周广宏
Owner JIANGSU UNIV OF SCI & TECH
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