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Method for preparing micro-nano composite structure on surface of titanium substrate

A micro-nano composite structure, titanium matrix technology, applied in surface reactive electrolytic coating, manufacturing tools, welding equipment, etc., can solve the problem of reduced mechanical strength of titanium implants, unfavorable adhesion of osteoblasts, and adverse effects of osseointegration, etc. problems, to achieve the effect of reducing bone resorption, improving biological activity and compatibility, and improving stability

Inactive Publication Date: 2016-06-01
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, various surface modification methods are used to treat titanium implants in order to obtain good biocompatibility, such as sand blasting and acid etching, sand blasting and acid etching plus micro-arc oxidation, electrochemical micromachining and acid etching method, etc., but there are many problems in the existing treatment methods, the residual particles of sand blasting treatment may have adverse effects on osseointegration, and the hydrogen permeation caused by acid etching treatment will reduce the mechanical strength of titanium implants and cause hydrogen embrittlement.
In addition, the edge of the pit structure constructed by sandblasting and acid etching is sharp, which is different from the resorption pit formed by osteoclasts, which is not conducive to the adhesion of osteoblasts.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Select pure titanium samples (10mm*10mm*1mm) for physical polishing and chemical polishing in sequence:

[0033] Physical polishing: Grinding 4 times, the number of sandpaper mesh is 800, 1000, 1500 and 2000.

[0034] Chemical polishing: 200ml of aqueous solution containing 3wt% HF and 0.02wt‰ potassium perfluorooctane sulfonate is used as the polishing solution.

[0035] The polishing time is 2 minutes, and then immerse in acetone, ethanol and deionized water for 3 minutes, and then dry;

[0036] (2) Femtosecond laser processing: Polished pure titanium samples are used. The processing parameters are: defocus amount 0 μm, scanning distance 30 μm, power 100mw, scanning speed 0.8mm / s, and the speed direction is perpendicular to the light polarization direction. 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...

Embodiment 2~15

[0044] In these 14 embodiments, the femtosecond laser processing parameters are: defocus amount 0 μm, scanning distance 30 μm, power 100mw, scanning speed 0.8mm / s, the list of anodizing parameters is shown in Table 1, and other operating steps and process parameters are the same as in the embodiment 1;

[0045]

Voltage (v)

time (min)

Ratio of organic solvent to deionized water

Example 2

10

20

1:1

Example 3

10

25

1:1

Example 4

10

30

1:1

Example 5

20

10

1:1

Example 6

20

20

1:1

Example 7

30

10

1:1

Example 8

30

13

1:1

Example 9

30

15

1:1

Example 10

10

30

0.5:1

Example 11

20

15

0.5:1

Example 12

30

10

0.5:1

Example 13

10

30

1.5：1

Example 14

20

15

1.5：1

Example 15

30

10

1.5：1

[0046] Embodiment 2...

Embodiment 16~29

[0050] In these 14 embodiments, the femtosecond laser processing parameters are: defocus amount 0 μm, scanning distance 30 μm, power 150mw, scanning speed 0.8mm / s, anodizing parameters are the same as in Table 1, and other operating steps and process parameters are the same as in Example 1 ;

[0051] Embodiment 16~29 gained structure parameters are shown in Table 3

[0052] Table 3 embodiment 16~29 gained structural parameters

[0053]

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Abstract

The invention discloses a method for preparing a continuous gentle micro-nano structure on a titanium substrate from the outside to the inside through femtosecond laser processing and then anodizing. The method comprises the three steps of polishing, femtosecond laser processing and anodizing. The continuous gentle micro-nano structure prepared through the method is good in repeatability, high in stability and controllable in size and has excellent mechanical properties and biological properties. Due to the fact that the continuous gentle micro-nano structure is formed by partially converting an implantation material and no obvious separatrix exists between the structure and the substrate, the combination strength of the structure and the titanium substrate is high; in addition, the continuous gentle concave pit structure is more approximate a natural bone structure, and osteoblast adhesion growing is facilitated.

Description

technical field [0001] The invention belongs to the field of titanium and titanium alloy processing, in particular to a method for preparing a micro-nano composite structure on the surface of a titanium substrate. 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, there are still relatively large differences between titanium and titanium alloys and bone tissue in terms of structure and properties. The mismatch between them and bone tissue in terms of mechanical properties will cause different strains in the stressed metal and bone, and relative displacement at the interface, thus Cause loosening at the interface; in addition, because the stress cannot be completely transmitted from the human joint to its adjacent bone tissue, it may lead to bone resorption and functional degradation, resulting in stress shielding phenom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26B23K26/40
CPCC25D11/26B23K26/40
Inventor 梁春永董亚慧王洪水程翔胡文婷
Owner HEBEI UNIV OF TECH
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