Preparation of nano-HAP coating/magnesium alloy composite biological material

A technology of composite biomaterials and magnesium alloys, which is applied in the field of preparation of nano-HAP coatings/magnesium alloy composite biomaterials, can solve the problems of affecting phosphate nucleation, low bonding strength, and not very dense coatings, etc., to avoid matrix Effects of overheating, increasing bonding strength, and avoiding phase transition of the coating

Inactive Publication Date: 2008-11-12
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the electrodeposition process, when the deposition potential is high, more serious hydrogen evolution phenomenon will appear on the surface of the sample, which greatly affects the nucleation of phosphate, making the coating not very dense, and the bonding strength is low, while the hydrogen evolution reaction produces The OH is necessary for the formation of hydroxyapatite crystals

Method used

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  • Preparation of nano-HAP coating/magnesium alloy composite biological material
  • Preparation of nano-HAP coating/magnesium alloy composite biological material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] AZ31 magnesium alloy is used as the base material, and its alloy composition (wt%) is: Al 3.13%, Zn 1.21%, Mn 0.47%, Si 0.04%, Mg balance.

[0034] (1) Preparation of coating electrolyte: weigh NH 4 h 2 PO 4 (99.5%) 0.54g, NaNO 3 (99%) 6.38g, Ca(NO 3 ) 2 .4H 2 O (99%) 1.89g is configured into 750ml of dilute solution, that is, the atomic ratio of calcium and phosphorus is adjusted to 1.67, stirred evenly with a glass rod; 3 or (CH 2 Oh) 3 CNH 2 Adjust the pH value of the solution to 5.0, stir well and evenly, and obtain the electrolyte solution for use.

[0035] (2) Substrate material pretreatment: AZ31 magnesium alloy substrate is wire-cut into rectangular blocks, polished and polished sequentially with 100-1000 metallographic sandpaper, washed with deionized water, and prepared with acetone and alcohol mixed solution, the volume ratio of which is 1:1 , place the matrix material in the mixed solution for ultrasonic cleaning for 10 minutes to remove oil, and d...

Embodiment 2

[0039] Using ZK60 magnesium alloy as the base material, its alloy composition (wt%) is: Zn 5.83%, Zr 0.45%, Mn 0.04%, Ca 0.02%, Mg balance.

[0040] (1) Electrolyte configuration: weigh NH 4 h 2 PO 4 (99.5%) 2.7g, NaNO 3 (99%) 3.2g, Ca(NO 3 ) 2 .4H 2 O (99%) 9.45g, configured into 750ml of dilute solution, that is, adjusting the calcium-phosphorus atomic ratio to 1.67, stirring evenly with a glass rod, and using HNO 3 or (CH 2 Oh) 3 CNH 2 Adjust the pH value of the solution to 6.0, stir well and evenly, and obtain the electrolyte solution for use.

[0041] (2) Pretreatment of substrate materials: AZ31 magnesium alloy substrates are cut into rectangular pieces by wire, polished and polished sequentially with 100-1000 metallographic sandpaper, washed with deionized water, and mixed with acetone:alcohol with a volume ratio of 0.8:1. , place the matrix material in the mixed solution for ultrasonic cleaning for 5 minutes to remove oil, and dry at room temperature; put 30%...

Embodiment 3

[0045] AZ80 magnesium alloy is used as the base material, and its alloy composition (wt%) is 7.98% of Al, 0.32% of Zn, 0.23% of Mn, and the balance of Mg.

[0046] (1) Electrolyte configuration: weigh NH 4 h 2 PO 4 (99.5%) 0.54g, NaNO 3 (99%) 9.6g, Ca(NO 3 ) 2 .4H 2 O (99%) 2.26g, configured into 750ml of dilute solution, that is, adjusting the calcium-phosphorus atomic ratio to 2.0, stirring evenly with a glass rod, and using HNO 3 or (CH 2 Oh) 3 CNH 2 Adjust the pH value of the solution to 4.2, stir well and evenly, and obtain the electrolyte solution for use.

[0047] (2) Pretreatment of substrate materials: AZ31 magnesium alloy substrate wire-cut rectangular blocks, polished and polished sequentially with 100-1000 metallographic sandpaper, washed with deionized water, and prepared with a mixed solution of acetone:alcohol with a volume ratio of 0.5:1 , place the matrix material in the mixed solution for ultrasonic cleaning for 15 minutes to remove oil, and dry at ...

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Abstract

The invention provides a method for making a nano HAP coating / magnesium alloy composite biomaterial. The method is as follows: the method takes a magnesium alloy as a cathode and graphite as an anode; the magnesium alloy and the graphite are placed in electrolyte containing NH4H2PO4, NaHO3 and Ca(OH3)2.4H2O so as to carry out stepped electrodeposition at a temperature of between 60 and 95 DEG C and a voltage of between minus 5 V to minus 1 V and 0 V, thereby effectively improving the interface bonding between a coating and a matrix and reducing hydrogen evolution during electrodeposition; meanwhile, the increase of magnesium ions at an interface can realize in-situ doping of magnesium ions and hydroxyapatite so as to generate a magnesium phosphate transition layer on the surface of the magnesium alloy and to increase bonding strength; thus, a degradable nano acicular hydroxyapatite / magnesium alloy coating composite biomaterial with excellent mechanical property, biocompatibility and corrosion resistance can be obtained. Meanwhile, the method also has the advantages of low cost of raw materials and simple technological operation, etc.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy biomaterial preparation, and in particular relates to a preparation method of nanometer HAP (HAP is hydroxyapatite) coating / magnesium alloy composite biomaterial. Background technique [0002] Life medical materials are related to the improvement of human health and life quality. They are a kind of newly developed high-tech new materials and are developing into a pillar industry of the 21st century economy. The implantation of artificial bone materials into the human body must meet two basic conditions: (1) the implant material should have good biocompatibility and high bioactivity; (2) the implant material should have suitable mechanical properties and certain chemical stability. At present, the most commonly used metal materials for internal fixation are mainly stainless steel, Co-Cr alloy, titanium and alloys. Compared with ceramics and polymers, they have higher mechanical properties ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/04A61L27/40
Inventor 关绍康温翠莲王利国赵晶王项
Owner ZHENGZHOU UNIV
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