Preparation method of biopiezoelectric coating on titanium alloy surface

A titanium alloy and coating technology, which is applied in the field of preparation of bio-piezoelectric coatings on the surface of titanium alloys, can solve the problems of poor biological properties of coatings, shorten treatment time, etc., achieve good nano-effects, shorten treatment time, and promote osteogenesis differentiation effect

Inactive Publication Date: 2019-07-16
XIAN UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a bio-piezoelectric coating on the surface of a titanium alloy, which solves the problem of poor biological properties of the coating prepared on the surfa

Method used

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  • Preparation method of biopiezoelectric coating on titanium alloy surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1: Titanium Alloy Treatment

[0030] Polish the surface of the titanium sheet to a mirror surface; then put it into a chemical polishing solution for polishing;

[0031] Step 2: Preparation of titanium dioxide nanotube coating on titanium alloy surface

[0032] Ammonium fluoride and water are added to ethylene glycol in a certain proportion and stirred evenly to obtain a clear and transparent electrolyte; the platinum sheet is used as the cathode, and the titanium alloy treated in step 1 is used as the anode, and the distance between the anode and the cathode is fixed and controlled. The anodizing voltage and anodizing time make the titanium alloy undergo an anodic oxidation reaction; after the reaction is completed, the titanium alloy is taken out, cleaned, and then annealed to form a titanium dioxide nanotube coating on the surface of the titanium alloy;

[0033] Among them, the mass ratio of ammonium fluoride, water, and ethylene glycol is 3:50:1950; the distan...

Embodiment 2

[0041] Step 1: Same as Step 1 of Example 1, the only difference is: replace the titanium sheet with a titanium nail, and directly perform chemical polishing;

[0042] Step 2: roughly the same as Step 2 of Example 1, the only difference is that the mass ratio of ammonium fluoride, water, and ethylene glycol is 10:100:1900 in sequence; the distance between the anode and the cathode is 30mm; the anodic oxidation voltage 40~80V; oxidation time is 5h; cleaning method is ultrasonic cleaning; annealing temperature is 150℃, and annealing time is 15h.

[0043] Step 3: It is roughly the same as Step 3 of Example 1, except that the molar concentration of the calcium hydroxide aqueous solution is 0.5 mol / L; the hydrothermal temperature is 150° C., and the hydrothermal time is 5 hours; the cleaning method is ultrasonic cleaning.

[0044] Step 4: roughly the same as Step 4 of Example 1, the only difference is that in the electrochemical deposition reaction, the current is 1mA, and the time ...

Embodiment 3

[0046] Step 1: It is roughly the same as Step 1 of Example 1, the only difference is: replace the titanium sheet with a titanium nail, and directly perform chemical polishing;

[0047]Step 2: roughly the same as Step 2 of Example 1, the only difference is that the mass ratio of ammonium fluoride, water, and ethylene glycol is 5:150:1850 in sequence; the distance between the anode and the cathode is 20mm; the anodic oxidation voltage 40 ~ 80V; oxidation time is 2h; cleaning method is ultrasonic cleaning; annealing temperature is 400 ℃, annealing time is 5h.

[0048] Step 3: It is roughly the same as Step 3 of Example 1, except that the molar concentration of the strontium hydroxide aqueous solution is 0.1 mol / L; the hydrothermal temperature is 220° C., and the hydrothermal time is 1 h; the cleaning method is ultrasonic cleaning.

[0049] Step 4: roughly the same as Step 4 of Example 1, the only difference is that in the electrochemical deposition reaction, the current is 10mA, ...

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Abstract

The invention discloses a preparation method of biopiezoelectric coating on titanium alloy surface. According to the preparation method of the biopiezoelectric coating on the titanium alloy surface, perovskite-structured nanotube coating is prepared on surface of titanium alloy by adopting an anodic oxidation method combined with hydrothermal reaction; and then, the perovskite-structured nanotubecoating is compounded with hydroxyapatite, thereby forming biopiezoelectric coating on the surface of the titanium alloy. The biopiezoelectric coating on the titanium alloy surface prepared by the preparation method has piezoelectric effects capable of promoting osteogenic differentiation, and is excellent in biological activity; and thus, the biopiezoelectric coating on the titanium alloy surfaceis capable of effectively accelerating bone repair process so as to shorten treatment cycle. Moreover, the biopiezoelectric coating on the titanium alloy surface can form effective osseointegration with tissues near the implantation site, thereby reducing risk of loosening.

Description

technical field [0001] The invention belongs to the technical field of medical titanium alloy surface treatment, and in particular relates to a preparation method of a biological piezoelectric coating on the surface of titanium alloy. Background technique [0002] The repair and treatment of bone defects is the focus and difficulty of human medicine. In the clinical research of bone defect treatment methods, the use of implant materials for transplantation is one of the most commonly used and effective methods. In clinical practice, titanium alloy is the most commonly used implant material. . However, the titanium alloy currently used clinically is a biologically inert material. After implantation, it can only form a simple mechanical combination with the surrounding bone defect, but cannot form a strong osseointegration, and the implant is prone to loosening or even failure. Therefore, it is necessary to modify the surface of titanium alloy to make it have certain biologic...

Claims

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Application Information

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IPC IPC(8): A61L27/06A61L27/30A61L27/50A61L27/32C25D11/26C25D9/08B82Y40/00
CPCA61L27/06A61L27/306A61L27/32A61L27/50A61L2400/12A61L2430/02B82Y40/00C25D9/08C25D11/26
Inventor 汤玉斐吴聪赵康王田茹兴博毛博博
Owner XIAN UNIV OF TECH
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