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Method for improving biological friction and corrosion resistance of titanium alloy surface

A corrosion-resistant, titanium alloy technology, applied in the direction of tissue regeneration, metal material coating process, coating, etc., can solve the problems of unverified wear resistance and corrosion resistance, and achieve simple and feasible construction method, microhardness Increased, improved effect of biotribological properties

Active Publication Date: 2022-03-29
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wear resistance and corrosion resistance properties have not been verified, nor have they been further applied to medical materials
[0007] Based on the above materials, it can be seen that there is no effective method in the prior art that can excellently improve the wear resistance and corrosion resistance of the titanium alloy surface

Method used

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  • Method for improving biological friction and corrosion resistance of titanium alloy surface
  • Method for improving biological friction and corrosion resistance of titanium alloy surface
  • Method for improving biological friction and corrosion resistance of titanium alloy surface

Examples

Experimental program
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Effect test

Embodiment 1

[0046] This embodiment selects Ti-Ni-Fe ternary alloy to provide Ti-Ni-Fe surface Fe 3 o 4 / HA coating composite coating and its preparation method are used to improve the corrosion resistance and biotribological properties of its surface. The preparation method comprises the following steps:

[0047] Polish Ti-Ni-Fe to a surface roughness of 0.5 μm, wash three times with acetone and deionized water, blow dry with nitrogen, soak in 2mol / L KOH solution for 24h; then put it into 3% silane coupling The reagent solution was reacted for 2 h to assemble the silane film.

[0048] After the sample obtained above was washed with water, it was placed in a 2 g / L dopamine solution to react for 12 hours, and a polydopamine adhesion layer was assembled on the surface. Then take it out and clean it for later use.

[0049] Weigh 0.37g of ferrous chloride and 1g of ferric chloride and dissolve them in 30mL of deionized water, then add 50mL of ammonia water (concentration is 25%), place in ...

Embodiment 2

[0055] The medical titanium alloy plate used in this embodiment is the raw material Ti6Al4V alloy of a certain medical equipment company, and the used Fe 3 o 4 The / HA coating was made in the laboratory. The preparation method comprises the following steps:

[0056] Polish the surface of the Ti6Al4V alloy to a roughness of 0.1 μm, wash it several times with deionized water, soak it in a 10mol / L NaOH solution for 6 hours; then put it into a 1wt% silane coupling agent aqueous solution to assemble the silane adhesion layer, Time 6h. After drying the surface with nitrogen, put it into 5g / L dopamine solution to assemble the polydopamine transition layer for 6h. After taking it out and cleaning it, it was blown dry with nitrogen gas, and the obtained sample was used for future use.

[0057] Weigh 0.37g of ferrous chloride and 1g of ferric chloride and dissolve them in 30mL of deionized water, then add 50mL of ammonia water (concentration is 25%), place in a 100mL three-necked fl...

Embodiment 3

[0069] This embodiment provides a surface construction method for improving the tribological properties of metal materials and metal material friction systems and improving the corrosion resistance of body fluids. The specific steps are basically the same as in Example 1, except that the quality of the ferrous chloride and ferric chloride added in this example is 1g and 3g.

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Abstract

The invention relates to a method for improving biological friction and corrosion resistance of a titanium alloy surface. The method comprises the following steps: (1) carrying out hydroxylation treatment on the titanium alloy surface; (2) grafting a silane coupling agent and dopamine on the surface of the titanium alloy subjected to hydroxylation treatment; and (3) finally, the Fe3O4 / HA coating is grafted to the titanium alloy, and the method is completed. Compared with the prior art, the method has the advantages that Fe3O4 / HA is grafted on the surface of the titanium alloy through a self-assembly means, so that the biological tribological performance of the titanium alloy is improved, the corrosion resistance of the surface of the titanium alloy is improved, the whole process is simple, and the effect is outstanding.

Description

technical field [0001] The invention belongs to the technical field of preparation of surface coatings of medical devices, and relates to a method for improving the biofriction and corrosion resistance of titanium alloy surfaces, in particular Fe Fe which improves the biofriction and corrosion resistance of titanium alloy surfaces. 3 o 4 / HA composite coating preparation method. Background technique [0002] Due to its light weight, excellent mechanical properties and good biocompatibility, titanium alloy materials have been widely used in orthopedic internal fixation systems, artificial joint replacements and other human hard tissue implantation fields. However, the wear resistance of the titanium alloy surface is poor, and the titanium alloy is implanted into the human body and exposed to the corrosive environment of body fluid. dissolve. In addition, toxic ions disrupt the bioactive behavior between the implant and the tissue. Wear occurs when titanium implants rub ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/06A61L27/30A61L27/34A61L27/50C23C26/00
CPCA61L27/06C23C26/00A61L27/306A61L27/34A61L27/50C23C2222/20A61L2430/02C08L5/08
Inventor 王宸宸韩生田盼盼窦志富薛原晏金灿蔺华林
Owner SHANGHAI INST OF TECH
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