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Preparation method for wettability controllable porous structure of titanium and titanium alloy surface

A technology with porous surface and titanium alloy, applied in metal material coating process, gaseous chemical plating, coating, etc., can solve the problems of decreased biological activity, decreased bonding strength between coating and substrate, and reduced service life of implants. Achieve the effect of increasing the degree of combination and good timeliness

Inactive Publication Date: 2012-02-08
蔺增
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, due to the mismatch of the thermal expansion coefficient between the coating and the matrix and the generation of impurity phases, the bonding strength between the coating and the matrix will be reduced and the biological activity will be reduced, which will reduce the service life of the implant.

Method used

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  • Preparation method for wettability controllable porous structure of titanium and titanium alloy surface
  • Preparation method for wettability controllable porous structure of titanium and titanium alloy surface
  • Preparation method for wettability controllable porous structure of titanium and titanium alloy surface

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Effect test

Embodiment 1

[0036] The TC4 titanium alloy utilizes the SLA method of the present invention to prepare a porous structure, and the specific method is as follows: take the TC4 titanium alloy, and process it through wire cutting, turning, and grinding to prepare a disc-shaped sample, and then after degreasing, polishing, and cleaning processes, the Its sandblasting treatment, the sandblasting treatment time is 30s, after the sandblasting treatment, the surface of the sample piece changes from silvery white metallic luster to dark gray. Then put the sample into the H 2 SO 4 Corrosion is carried out in a mixed solution with HCl, and the mixed acid solution has a volume fraction of 60% H 2 SO 4 and 10% HCl according to the volume ratio of 1:1, the temperature of the acid solution is controlled at 50°C, the corrosion time is 10min, 20min, 30min, 40min, 50min, 60min, and finally the sample after acid corrosion is treated with 5% NaHCO 3 The solution was neutralized until the solution pH=7.

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Embodiment 2

[0040] TA4 medical pure titanium utilizes the SLA method of the present invention to prepare a porous structure, and the specific method is as follows:

[0041] Take TA4 pure titanium and process it by wire cutting, turning, and grinding to prepare a disc-shaped sample. After degreasing, polishing, and cleaning processes, it is sandblasted. The sandblasting time is 120s. After sandblasting The surface of the sample piece changed from silvery white metallic luster to dark gray. Then place the sample in the H 2 SO 4 Corrosion is carried out in HCl acid solution, and the mixed acid solution is 60% H by volume fraction 2 SO 4 and 10% HCl in a ratio of 1:1 by volume, the temperature of the acid solution was controlled at 75°C, and the corrosion time was 60 minutes. Finally, the acid-etched samples were treated with 5% NaHCO 3 The solution was neutralized until the solution pH=7.

[0042] Figure 4 It is the SEM photo of the surface and the test results of the contact angle of...

Embodiment 3

[0044] TC4 titanium alloy utilizes SLA method of the present invention to prepare porous structure, adopts HF / HNO 3 with H 2 SO 4 / HCl two-step corrosion, the specific method is as follows: take TC4 titanium alloy, and prepare a disc-shaped sample through wire cutting, turning, and grinding machining, and then sandblast it after degreasing, polishing, and cleaning processes, and spray The sand treatment time is 60s, and the surface of the sample piece changes from silvery white metallic luster to dark gray after sand blasting treatment. Then put the sample into HF / HNO 3 After being corroded in the acid solution for 30 sec, the H 2 SO 4 Corrosion in / HCl acid solution, in which HF / HNO 3 The mixed acid is 4% HF and 10% HNO by volume 3 Configured according to the volume ratio of 1:1, the temperature of the acid solution is controlled at 50°C, and the H 2 SO 4 / HCl mixed acid is 60% H by volume fraction 2 SO 4 and 10% HCl in a ratio of 1:1 by volume, the temperature of t...

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Abstract

The invention discloses a preparation method for a wettability controllable porous structure of a titanium and titanium alloy surface, and belongs to the technical field of surface modification of biological implant materials. The method comprises the following steps of: performing roughening treatment on the titanium and titanium alloy surface by using a sand-blast, large-grit and acid-etch method (SLA) to prepare a super-hydrophilic surface with a micron-nano double-microcosmic pore structure; preparing a titanium oxide thin film with hydrophilic performance by using a plasma oxidation process, wherein osteoblast adhesion and proliferation experiments show that the surface prepared by the process method has excellent bioactivity; and finally, forming a hydrophobic surface on a rough titanium oxide surface by using a molecular self-assembly method and realizing mutual switching between hydrophilicity and hydrophobicity of the surface by using plasma treatment and ultraviolet irradiation. The hydrophilicity of the surface of an implant is obviously improved in the aspects of stability, durability and the like; and the binding force of the metal implant material and a surface coating can be obviously improved while the bioactivity of the titanium and titanium alloy surface is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of surface modification of biological implant materials, in particular to a method for preparing a porous structure on the surface of titanium and titanium alloys with controllable wettability. Background technique [0002] Titanium and its alloys have good mechanical properties, biocompatibility and corrosion resistance, and are considered to be the most important hard tissue replacement materials at present, and are artificial joints (hip, knee, shoulder, ankle, elbow, wrist, finger joint, etc.) , orthopedic trauma products (intramedullary nails, steel plates, screws, etc.), spinal orthopedic internal fixation systems, dental implants, dental trays, dental orthopedic wires, artificial heart valves, interventional cardiovascular stents and other medical implant products Material. [0003] Titanium is an inert material with poor biological activity and lack of initiative in the process of osseointegration, ...

Claims

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Application Information

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IPC IPC(8): C23F17/00C23F1/26C23C16/44
Inventor 蔺增赵宝红
Owner 蔺增
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