Preparation method of ultrasonic microarc oxidation silver-carrying antibiotic bioactive coating on magnesium and titanium surface

A bioactive, micro-arc oxidation technology, applied in the direction of surface reaction electrolytic coating, coating, anodic oxidation, etc., can solve the problems of hydroxyapatite decomposition, low interface bonding strength, high internal stress of the coating, etc., to achieve good anti-corrosion Corrosion, guaranteed production cost, good mechanical properties

Inactive Publication Date: 2010-12-01
JIAMUSI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is in view of the poor biocompatibility of traditional hard tissue replacement materials such as stainless steel and other metal materials, the elastic modulus is very different from that of human bones, and problems such as stress shielding effects are prone to occur, while polymer materials such as polylactic acid have poor mechanical properties. , it is difficult to bear a large load; at the same time, in view of the traditional biological surface treatment technology, the deposition of biologically active elements at high temperature is easy to cause the decomposition, amorphization, easy dissolution, and low bonding strength of hydroxyapatite (HA). Problems such as cracks and excessive internal stress of the coating
There are problems such as low interface bonding strength and too thin coating thickness during low temperature deposition

Method used

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  • Preparation method of ultrasonic microarc oxidation silver-carrying antibiotic bioactive coating on magnesium and titanium surface
  • Preparation method of ultrasonic microarc oxidation silver-carrying antibiotic bioactive coating on magnesium and titanium surface
  • Preparation method of ultrasonic microarc oxidation silver-carrying antibiotic bioactive coating on magnesium and titanium surface

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1: Magnesium, titanium surface supersonic micro-arc oxidation silver-carrying antibacterial bioactive coating preparation method (change oxidation voltage) at first utilize micro-drilling machine to drill a round hole at the top of titanium alloy sample, rough surface on sandpaper Grind, then ultrasonically clean with acetone and distilled water for 20 minutes each, then perform sandblasting, then ultrasonically clean with distilled water for 30 minutes, dry naturally, tie 1.3mm aluminum wire to the drilled hole, put it in a sealed bag and seal it for later use . After the magnesium and titanium alloys are pretreated, the micro-arc oxidation electrolyte is configured, and the solvent of the electrolyte is distilled water, which is deionized water. Take 1L of distilled water for later use, weigh the main electrolyte required for the experiment, 20gNH 4 h 2 PO 4 and 31gCa(CH 3 COO) 2 ·H 2 O (Ca / P ratio of 0.9), then 1 L of distilled water was placed in tw...

Embodiment 2

[0067] Embodiment 2: Preparation of magnesium, titanium surface ultrasonic micro-arc oxidation silver-loaded antibacterial bioactive coating (change oxidation time)

[0068] First configure the micro-arc oxidation electrolyte, and the solvent of the electrolyte is distilled water. Take 1L of distilled water for later use, and then weigh the basic electrolyte required for the experiment, 20gNH 4 h 2 PO 4 and 31gCa(CH 3 COO) 2 ·H 2 O (Ca / P ratio is 0.9), then 1 L of distilled water was placed in two beakers, one with the electrolyte Ca (CH 3 COO) 2 ·H 2 O, one added electrolyte NH 4 h 2 PO 4 , placed in a magnetic stirrer and stirred for about 1 hour, until the electrolyte was completely dissolved and dispersed evenly, and then the Ca(CH 3 COO) 2 ·H 2 The solution of O is poured into the solution containing NH 4 h 2 PO 4 solution, put it on a magnetic stirrer and stir for about 1 hour until the two solutions are fully mixed, and the order of pouring cannot be cha...

Embodiment 3

[0069] Embodiment 3: the preparation of magnesium, titanium surface ultrasonic micro-arc oxidation silver-loaded antibacterial bioactive coating (changing AgNO 3 content)

[0070] First, use a micro-drilling machine to drill a round hole on the top of each titanium alloy sample with a 1.4mm drill bit, then use sandpaper to roughly grind the surface, then use acetone ultrasonic cleaning and distilled water ultrasonic cleaning for 20 minutes each, and perform sandblasting. Afterwards, use distilled water to ultrasonically clean for 30 minutes, and after drying naturally, tie a 1.3mm aluminum wire to the drilled hole, put it in a sealed bag and seal it for later use. After the titanium alloy is pretreated, the micro-arc oxidation electrolyte is configured, and the solvent of the electrolyte is distilled water, which is deionized water. Take 1L of distilled water for later use, first weigh the main electrolyte required for the experiment on an electronic scale, 20gNH 4 h 2 PO ...

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Abstract

The invention relates to a new method for preparing an antibiotic bioactive coating material on the surface of titanium alloy and magnesium alloy by ultrasonic-microarc oxidation composite technology, which can be used for obtaining a biological coating material which is compact at the bottom layer and is porous at the surface layer, wherein Ca, P and Ag contained in the coating can improve the bioactivity and the corrosion resistance of magnesium and titanium, and reduce bacterial infection caused by implantation. The invention can meet the requirements of bearing bones of human beings for mechanical properties of implanted materials, and can overcome disadvantages of the traditional surface modification method for biologic materials. In the coating composite material, the coating thickness of titanium alloy is 50-85 mu m, the surface hole diameter is 4-25 mu m, the porosity is 20-30%, and the bonding strength between the coating and the matrix is 23-40 MPa. The coating thickness of magnesium alloy is 16-22 mu m, the surface hole diameter is 5-28 mu m, the porosity is 21-30%, and the bonding strength between the coating and the matrix is 8-20 MPa.

Description

Technical field [0001] The invention relates to a new method for preparing magnesium alloy and titanium alloy bioactive antibacterial coating composite material. The composite material has the characteristics of good mechanical properties of metal materials and low wear, corrosion resistance and good biocompatibility of ceramic materials. It is suitable for the repair and replacement of long-term or short-term bone tissue damage, and is especially suitable as a load-bearing bone. At the same time, it can avoid the problem of bacterial infection caused by secondary surgery for short-term implantation of titanium alloys and regulate the degradation rate of magnesium alloys to match the rate of bone repair. Background technique [0002] With the increase of trauma such as bone injury and bone defect and the improvement of human living standards, the requirements for biomaterials such as hard tissue replacement, bone fixation, and repair are getting higher and higher. At the same...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C25D11/30C25D5/20A61L27/30A61L27/54A61L27/56A61L27/10A61L27/04A61L27/06
Inventor 李慕勤马臣张爱琴
Owner JIAMUSI UNIVERSITY
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