Medical titanium material surface oxidization strengthening method

A surface oxidation and anodic oxidation technology, applied in the direction of surface reaction electrolytic coating, electrolytic coating, coating, etc., can solve the problems of easy peeling of nanotubes and poor mechanical stability, and achieve enhanced mechanical stability, improved corrosion resistance, Effect of improving corrosion resistance

Active Publication Date: 2018-10-26
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

and the existing prepared TiO 2 Compared with the technology of nanotubes, the present invention solves the problem of ordinary anodized TiO without changing the structure of the material. 2 Nanotubes are easy to peel off, technical problems of poor mechanical stability, while enhancing the TiO 2 The corrosion resistance of nanotubes breaks through the limit of TiO 2 The bottleneck of the practical application of nanotube engineering materials has the advantages of low cost, simplicity and speed, and no need to introduce additional equipment. It is an ideal surface modification technology for medical titanium-based materials. Such materials will have great potential in the biomedical field important application prospects

Method used

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  • Medical titanium material surface oxidization strengthening method
  • Medical titanium material surface oxidization strengthening method
  • Medical titanium material surface oxidization strengthening method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 Novel titanium (titanium alloy)-TiO 2 Preparation of nanotube materials

[0025] 1. Prepare ammonium fluoride electrolyte and phosphoric acid electrolyte: weigh 2.0 g ammonium fluoride and 400 mL ethylene glycol, put ammonium fluoride into ethylene glycol and stir to dissolve. Measure 12 mL phosphoric acid and 400 mL ethylene glycol, dissolve phosphoric acid in ethylene glycol and stir thoroughly.

[0026] 2. Put the Ti metal sheet or titanium alloy block in the ammonium fluoride electrolyte for anodic oxidation pretreatment, take it out after 30 minutes and place it in deionized water for ultrasonic cleaning, then put it back into the ammonium fluoride electrolyte for anodic oxidation for 1 hour, After immersing in the phosphoric acid electrolyte again for anodic oxidation for 3 minutes, a new type of titanium (titanium alloy)-TiO 2 nanotube material.

Embodiment 2

[0027] Example 2 Material wear resistance test

[0028] A model using six friction and wear testing machines working simultaneously ( figure 1 ), for the new type of titanium (titanium alloy)-TiO 2 The friction and wear properties of the nanotube material surface were measured and evaluated. The frictional couple is a curvature stainless steel Pin (R=60 mm), the friction mode is a reciprocating sliding mode, the sliding length is 10 mm, and the rotation angle of the stainless steel Pin is 5 o , the friction test cycle is 12000 cycles, ordinary titanium-TiO 2 Nanotube material as a comparison.

[0029] Such as figure 2 As shown, after the test, ordinary titanium-TiO 2 Nanotube materials have experienced severe wear, while the new titanium (titanium alloy)-TiO 2 The amount of wear of the nanotube material is extremely small. Further, we measured the wear volume of the material and the dual surface, as image 3 As shown, ordinary titanium-TiO 2 Nanotube materials and th...

Embodiment 3

[0030] Example 3 TiO 2 Interfacial peel strength test of nanotube layer

[0031] TiO2 is measured by national standard ASTM D4541 / D7234, ISO 4624 / 16276-1 2 Interfacial bonding strength of nanotube layer on substrate surface, ordinary titanium-TiO 2 nanotube material as a comparison. Such as Figure 4 As shown, the new titanium (titanium alloy)-TiO 2 TiO on the surface of nanotube materials 2 The interlayer bond strength is greater than 2.5 MPa, close to level 1; while for ordinary titanium-TiO 2 As far as nanotube materials are concerned, the surface TiO 2 The bonding force between the layer and the substrate is only 1.4 MPa.

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Abstract

The invention discloses a medical titanium material surface oxidization strengthening method. According to the method, on the basis of an anodic oxidation two-step method, an organic acid solution isutilized as an electrolyte, short-time anodic oxidation is conducted, a bonding layer is formed at the interface position of the bottom of a TiO2 nano tube and a Ti substrate, and accordingly a novelshearing-resisting, abrasion-resisting and corrosion-resisting novel titanium (titanium alloy)-TiO2 nanotube engineering material is obtained. Compared with an existing TiO2 nanotube preparing technology, the technical problems that an ordinary anodic oxidation TiO2 nano tube is prone to stripping, and mechanical stability is poor are solved on the premise that material structures are not changed;meanwhile, the corrosion resisting performance of the TiO2 nano tube is improved, the bottleneck of limitation of actual TiO2 nano tube engineering material application is broken through, and the beneficial effects that cost is low, simpleness and rapidness are achieved, and additional equipment does not need to be introduced are achieved; and the medical titanium material surface oxidization strengthening method is an ideal surface modification technology applied to the medical titanium-based material, and the material has important application prospects in the biomedical field.

Description

technical field [0001] The invention relates to a surface oxidation strengthening method of a medical titanium material. Background technique [0002] Oxidation treatment on the surface of titanium-based materials is one of the necessary means to improve their wear resistance and corrosion resistance, especially in the field of biomedicine, which has important application prospects. At present, the surface oxidation treatment methods of titanium-based materials mainly include: anodic oxidation and micro-arc oxidation. Studies have shown that the growth of TiO on the surface of titanium-based materials by anodic oxidation 2 Nanotube layer is one of the key technologies to improve the biological activity of such materials. For example, the patent, the morphology of a metal surface etched nanohole array, 201220024411.0 reported that TiO 2 The nanotube layer has the function of promoting osteoblast differentiation. However, TiO prepared by conventional anodic oxidation 2 Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26
CPCC25D11/26
Inventor 周峰罗家骏刘朝宗麻拴红
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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