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Functionalized gradient composite coating on surface of porous titanium alloy and preparation method thereof

A composite coating, titanium alloy technology, applied in the field of materials, can solve the problems of high temperature, detrimental material stability, difficult clinical application requirements of coating and specific bonding strength, etc.

Inactive Publication Date: 2019-04-12
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the physical methods, the most mature research is the plasma spraying method, but the process temperature is too high, which will damage the stability of the material; the electrochemical method can obtain a uniform coating, but the bonding strength between the coating and the specific is difficult to meet the clinical use requirements; Compared with the other two methods, the chemical method has simple process, low cost, low process temperature, controllable coating composition, and can obtain a uniform coating. It is easy to make the coating have various functions, and the coating structure and composition are also consistent with Similar to natural bone, but the chemical method still needs to improve its deposition efficiency and the bonding strength between the coating and the substrate

Method used

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  • Functionalized gradient composite coating on surface of porous titanium alloy and preparation method thereof
  • Functionalized gradient composite coating on surface of porous titanium alloy and preparation method thereof
  • Functionalized gradient composite coating on surface of porous titanium alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A method for constructing a functional gradient composite coating on the surface of a porous titanium alloy, specifically comprising the steps of:

[0029] (1) Acid treatment: first prepare the corrosion solution required for acid treatment, select a mixed solution of alcohol nitric acid and hydrofluoric acid with a volume ratio of 1:3:7, and then immerse the porous titanium alloy in the corrosion solution for 3 minutes, then use After the tweezers are taken out, rinsed and dried with a hair dryer, observe whether the surface shows a bright silver-white metallic luster. If not, continue to soak in the corrosive solution until the surface shows a bright silver-white metallic luster, then stop.

[0030] (2) Alkaline heat treatment: ultrasonically clean the porous titanium alloy obtained in step (1) in acetone, alcohol, and deionized water for 20 minutes, then put it into NaOH aqueous solution (concentration: 5.0mol / L), heat it at 60°C for 24 hours, take it out and use Rin...

Embodiment 2

[0036] A method for constructing a functional gradient composite coating on the surface of a porous titanium alloy, specifically comprising the steps of:

[0037] (1) Acid treatment: first prepare the corrosion solution required for acid treatment, select a mixed solution of alcohol nitric acid and hydrofluoric acid with a volume ratio of 1:3:7, and then immerse the porous titanium alloy in the corrosion solution for 3 minutes, then use After the tweezers are taken out, rinsed and dried with a hair dryer, observe whether the surface shows a bright silver-white metallic luster. If not, continue to soak in the corrosive solution until the surface shows a bright silver-white metallic luster, then stop.

[0038] (2) Alkaline heat treatment: ultrasonically clean the porous titanium alloy obtained in step (1) in acetone, alcohol, and deionized water for 20 minutes, then put it into NaOH aqueous solution (concentration: 5.0mol / L), heat it at 60°C for 24 hours, take it out and use Rin...

Embodiment 3

[0044] A method for constructing a functional gradient composite coating on the surface of a porous titanium alloy, specifically comprising the steps of:

[0045] (1) Acid treatment: first prepare the corrosion solution required for acid treatment, select a mixed solution of alcohol nitric acid and hydrofluoric acid with a volume ratio of 1:3:7, and then immerse the porous titanium alloy in the corrosion solution for 3 minutes, then use After the tweezers are taken out, rinsed and dried with a hair dryer, observe whether the surface shows a bright silver-white metallic luster. If not, continue to soak in the corrosive solution until the surface shows a bright silver-white metallic luster, then stop.

[0046] (2) Alkaline heat treatment: ultrasonically clean the porous titanium alloy obtained in step (1) in acetone, alcohol, and deionized water for 20 minutes, then put it into NaOH aqueous solution (concentration: 5.0mol / L), heat it at 60°C for 24 hours, take it out and use Rin...

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Abstract

The present invention provides a functionalized gradient composite coating on surface of porous titanium alloy. The gradient composite coating successively comprises a porous titanium matrix, a nanoscale activation layer, a precalcification layer, a HA layer and a collagen layer. A preparation method of the composite coating comprises the following steps: (1) an acid treatment is conducted: poroustitanium alloy is soaked in corrosive liquid until the surface presents bright silver-white metallic luster, and the soaking stops; (2) an alkali heat treatment is conducted: the porous titanium alloy is respectively washed with acetone, alcohol and deionized water successively in an ultrasonic cleaning machine, and the porous titanium alloy is put into an alkali solution for treatment; (3) precalcification treatment is conducted: the porous titanium alloy is soaked in a solution of Na2HPO4 and saturated Ca(OH)2; (4) HA coating preparation is conducted: the porous titanium alloy is placed ina test tube containing simulated body fluid and the test tube is put into constant temperature water bath for soaking; and (5) the porous titanium alloy is subjected to high-pressure disinfection andsterilization, drying is conducted, and then the porous titanium alloy is soaked in a water-soluble human collagen solution to obtain the finished product.

Description

technical field [0001] The invention relates to a functional gradient composite coating constructed on the surface of a porous titanium alloy, which belongs to the field of material technology. Background technique [0002] The implanted material cannot produce toxic side effects on the surrounding tissue, especially cannot induce tissue teratogenicity and genetic lesions; conversely, the tissue around the implant cannot produce strong corrosion and rejection reactions to the material. Although titanium and titanium alloys are the most widely used metals in human hard tissue replacement, and the porous structure of porous titanium alloys can reduce stress shielding by adjusting the porosity so that the elastic modulus of the material is close to that of human bone, its unique three-dimensional interconnected pores can make Body fluids and nutrients are transported in porous implants, promoting tissue regeneration and reconstruction, and speeding up the healing process, but t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/06A61L27/32A61L27/34A61L27/56C23C26/00
CPCA61L27/06A61L27/32A61L27/34A61L27/56A61L2420/04A61L2430/02C23C26/00C08L89/00
Inventor 李若琳张云龙程亮陈逸李仁兴卢雅琳
Owner JIANGSU UNIV OF TECH
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