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Method for preparing orderly micro-nano structure on titanium substrate surface

A micro-nano structure, titanium matrix technology, applied in prosthesis, medical science and other directions, can solve problems such as no research reports, surface wear debris, inflammation, etc., to eliminate randomness, easy integration, and slow down bone resorption. Effect

Inactive Publication Date: 2015-06-10
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these surface structures improve the mechanical properties and biological properties of implants to a certain extent and within a certain period of time, however, there are no research reports on the surface structures that simultaneously improve the mechanical properties and biological activities.
In addition, under the complex physiological environment and load of the above two surface structures, the former may generate cracks along the interface between the porous surface and the dense body phase, causing shedding, while the latter is prone to wear debris on the surface, causing inflammation

Method used

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  • Method for preparing orderly micro-nano structure on titanium substrate surface
  • Method for preparing orderly micro-nano structure on titanium substrate surface
  • Method for preparing orderly micro-nano structure on titanium substrate surface

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Select pure titanium samples (total surface area is about 2000mm 2 ) followed by conventional grinding, physical polishing and chemical polishing:

[0031] Physical polishing: Grinding 3 times, the number of sandpaper meshes is 800, 1000 and 1500 in turn.

[0032] Chemical polishing: use 200ml of aqueous solution containing 3wt% HF and 0.02wt‰ potassium perfluorooctane sulfonate as the polishing solution, and the polishing time is 2 minutes, then use acetone, ethanol and deionized water to immerse in ultrasonic cleaning for 3 minutes, and dry;

[0033] (2) Acid etching: The polished pure titanium sample was placed in 200ml aqueous solution containing 66wt% concentrated sulfuric acid, and immersed at 80°C for 5min. Then at room temperature, use acetone, ethanol and deionized water to ultrasonically clean in turn, acetone for 1 minute, ethanol and deionized water for 2 minutes each, after drying, observe the surface image under a field emission scanning electron micr...

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Abstract

The invention belongs to the field of processing of titanium and titanium alloy and discloses a method for constructing an orderly micro-nano structure by performing a two-step etching on a titanium and titanium alloy substrate from outside to inside; and the method specifically comprises the steps of polishing, acidic etching and electrochemical etching. The micro-nano structure with an orderly surface prepared by the method is good in repeatability, high in stability, controllable in size and excellent in biological activity and mechanical property. In addition, the structure is formed by transforming a body material, has no sharp interface with the substrate and has no sintering neck, so that the structure has high bonding strength with the titanium substrate.

Description

technical field [0001] The invention belongs to the field of titanium and titanium alloy processing, in particular to a method for preparing an ordered micro-nano structure on the surface of titanium and titanium alloy. Background technique [0002] Titanium is the most widely used material for hard tissue implants, and has received good clinical results as artificial bones, artificial joints, and dental implants. However, the biological inertness of titanium and its mechanical mismatch with bone tissue are still the main reasons for the failure of its implantation. The mechanical properties of titanium, especially the elastic modulus, are quite different from those of natural bone. Long-term implantation may produce stress shielding, resulting in bone resorption and even loosening of the implant. The biological inertness of titanium will also make the implant poorly combined with bone tissue, affecting the normal use of the implant. These will not only cause pain to patie...

Claims

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Application Information

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IPC IPC(8): C25F3/08C23F1/26A61L27/06A61L27/50
Inventor 李宝娥郝静祖闵阳李海鹏梁春永王洪水
Owner HEBEI UNIV OF TECH
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