Bionic multi-scale structural surface with excellent tribological performance and preparation method

A technology of structural surface and tribology, used in medical science, prosthesis, metal material coating technology, etc., can solve problems such as adverse biological reactions, affecting the quality and service life of artificial joints, and easy to wear

Inactive Publication Date: 2012-06-13
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In daily activities, artificial joints are prone to wear and tear under frequent friction, and the generated wear debris accumulates in the body, which can induce a series of adverse

Method used

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  • Bionic multi-scale structural surface with excellent tribological performance and preparation method
  • Bionic multi-scale structural surface with excellent tribological performance and preparation method
  • Bionic multi-scale structural surface with excellent tribological performance and preparation method

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preparation example Construction

[0028] A method for preparing a bionic multi-scale structure of an artificial joint friction surface, comprising the following steps:

[0029] (1)) Prepare micropore groups on the surface of titanium alloy, cobalt-based alloy, and stainless steel alloy by laser etching or anodic oxidation; the diameter of micropores prepared by laser etching is 100-500 μm, and the depth is 10-80 μm. Micropore area density is 1-20%;

[0030] (2) in H 2 O plasma, O 2 Pretreatment in plasma or ultraviolet light for 5-30min to obtain hydroxylated surface;

[0031] (3) Put it in a silane coupling agent with a mass fraction of 1-20% and let it stand for 2-24h, dry and solidify in a vacuum oven to obtain a silanized surface;

[0032] (4) In the presence of a photosensitizer, ultraviolet light triggers the grafting of biocompatible monomers on the surface of the porous substrate, preferably the photosensitizer is pre-coated on the ultra-high molecular weight surface. Immerse in an acetone solution...

Embodiment 1

[0036] A pulsed laser is used to prepare a regular microporous structure on the surface of titanium alloy (TC4). The pore diameter is 500 μm, the depth is 80 μm, and the area density of the micropore group is 1%. A plasma etching machine with a 500w high-frequency output H 2 O steam plasma, treat the surface of the porous titanium alloy for 5 minutes; immerse in an ethanol solution with a mass fraction of 20% methacryloxypropyltrioxymethylsilane, let stand at room temperature for 2 hours, wash with ethanol, and cure in a vacuum oven. Immerse the silanized sample in 0.01mol / L benzophenone in acetone solution for 180s to attach photosensitizer, dry in dark room to remove acetone; prepare 0.05mol / L MPC monomer solution, and pass nitrogen gas to remove oxygen, sample Immerse in the monomer solution and put it under the ultraviolet lamp to irradiate the grafting for 60min.

Embodiment 2

[0038] Such as Figure 4 As shown, a regular microporous structure was prepared on the surface of titanium alloy (TC4) with a pulsed laser, and the pore diameter was 350 μm, the depth was 52 μm, and the area density of the micropore group was 2.6%. frequency output H 2 O plasma, treat the surface of the porous titanium alloy for 10 minutes; immerse in an ethanol solution with a mass fraction of 10% methacryloxypropyltrioxymethylsilane, let stand at room temperature for 6 hours, wash with ethanol, and cure in a vacuum oven. Immerse the silanized sample in the acetone solution of 0.1mol / L benzophenone for 60s to attach the photosensitizer, and dry it in a dark room to remove the acetone; prepare a 1mol / L NVP monomer solution, pass through nitrogen to remove oxygen, and immerse the sample in The monomer solution was irradiated and grafted under ultraviolet light for 45min.

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Abstract

The invention discloses a bionic multi-scale structural surface with excellent tribological performance and a preparation method. The preparation method includes steps of simulating multiple holes and brush structure on a shallow surface layer of the natural joint cartilage and a lubricating function, building a micrometer-scale porous structure on the friction surface of an artificial joint physically or chemically, grafting polymer molecule brushes which are high in hydrophile and fine biocompatibility so as to form a multi-scale structural surface from micrometers, nanometers to molecules. The tribological performance of an implantation body is evidently improved, tissue reactivity of abrasive dust, osteolysis and loosening can be effectively alleviated, and the service life of the artificial joint can be prolonged evidently.

Description

technical field [0001] The invention relates to the field of friction surfaces of implants such as artificial joints, in particular to a bionic multi-scale structure surface with excellent biotribological properties and a preparation method thereof. Background technique [0002] In daily activities, artificial joints are prone to wear and tear under frequent friction, and the generated wear debris accumulates in the body, which can induce a series of adverse biological reactions in the basal cells, resulting in osteolysis and aseptic loosening around the prosthesis, seriously affecting quality and service life of artificial joints. [0003] Studies have found that there are microscopic concave-convex structures with a microscopic roughness of about 1-6 μm on the surface of natural cartilage, such as image 3 As shown, a good microporous structure can buffer the shock and bear the pressure, and can also store the lubricating fluid and improve the lubrication environment of th...

Claims

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Application Information

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IPC IPC(8): C23F17/00C23C22/02C23C22/83C08F292/00C08F2/48C23F4/00C25D11/02A61L27/40A61L27/56
Inventor 熊党生杨远圆
Owner NANJING UNIV OF SCI & TECH
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