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Method for preparing bioactive glass coating-coated magnesium alloy medical material by pressurized heat treatment

A bioactive glass and magnesium alloy technology, applied in coatings, metal material coating technology, medical science and other directions, can solve the problems of unsatisfactory adhesion strength of coatings/magnesium alloys, achieve a good physical barrier effect, improve biological Active, wide-ranging effects

Inactive Publication Date: 2016-05-11
TIANJIN UNIV
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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 to solve the problem that the corrosion resistance of the sol-gel bioactive glass coating coated magnesium alloy medical material prepared by normal pressure heat treatment and the adhesion strength of the coating / magnesium alloy are not ideal enough to provide a pressure heat treatment A method for preparing a bioactive glass coating-coated magnesium alloy medical material, the pressurized heat treatment takes into account the viscous flow of the gel coat in its glass transition range and the superplastic deformation of the medical magnesium alloy at a temperature of 380-430°C temperature range can occur simultaneously

Method used

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  • Method for preparing bioactive glass coating-coated magnesium alloy medical material by pressurized heat treatment
  • Method for preparing bioactive glass coating-coated magnesium alloy medical material by pressurized heat treatment
  • Method for preparing bioactive glass coating-coated magnesium alloy medical material by pressurized heat treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Process the AZ31 magnesium alloy into a block of 10mm×10mm×2mm, and use 240 # , 1200 # , 2000 # Polished with SiC sandpaper, then ultrasonically cleaned in acetone, deionized water, and ethanol for 10 minutes, and dried with hot air.

[0034] (2) Weigh 3.4mL of ethyl orthosilicate in 2.4mL of 0.1M HNO 3 In the medium, magnetically stirred for 30 minutes, then add 0.29 mL of triethyl phosphate, and continue to stir for 15 minutes. Weigh 1.38gNaNO 3 And 2.12gCa(NO 3 ) 2 ·4H 2 O was dissolved in 40 mL of deionized water. Ca(NO 3 ) 2 ,NaNO 3 The solution was slowly added dropwise to the above sol, magnetically stirred for 60 minutes to obtain a uniform and transparent (Na 2 O-CaO-SiO 2 -P 2 O 5 ) Sol, dilute the concentration of the glass sol to 2wt.% with deionized water. The polished and dried magnesium alloy is completely immersed in the prepared glass sol, immersed and pulled twice at a speed of 4 mm / min, and dried in the air for 24 hours.

[0035] (3) Place the dried s...

Embodiment 2

[0039] (1) Process the AZ91 magnesium alloy into a block of 10mm×10mm×2mm, and use 240 # , 1200 # Polished with SiC sandpaper, then ultrasonically cleaned in acetone, deionized water, and ethanol for 6 minutes, and dried with hot air.

[0040] (2) F127 was added as a template when preparing glass sol, and then the concentration of glass sol was adjusted to 4wt.% with ethanol to obtain mesoporous (Na 2 O-CaO-SiO 2 -P 2 O 5 ) Sol, other processing procedures are the same as step 2 of Example 1.

[0041] (3) Place the dried sample in a muffle furnace, in an air atmosphere, increase from room temperature to 380°C at a rate of 2°C / min, keep it for 2h, and then cool with the furnace to remove the gel coating Organic matter and nitrate.

[0042] (4) Put the debinding sample into a closed jacket mold, place it in a hot isostatic pressing furnace, raise it from room temperature to 400°C at a rate of 15°C / min, and then load it at 10Pa / s Load the speed to 6MPa, then keep the temperature and ke...

Embodiment 3

[0045] (1) Use AZ61 as a magnesium alloy matrix, and 240 # , 1200 # , 1500 # The SiC sandpaper is polished, then ultrasonically cleaned in acetone, deionized water, and ethanol for 8 minutes, and dried with hot air.

[0046] (2) Weigh 1.669gP 2 O 5 Slowly add 22.5 mL of absolute ethanol and stir vigorously for 2 hours to obtain a uniform transparent phosphorus-based precursor solution. Weigh 10 mL of ethylene glycol and 15 mL of absolute ethanol solution, add 2.773 g of calcium nitrate, 0.256 g of sodium nitrate, and 0.14 g of zinc nitrate in sequence, and stir for 1 hour to obtain a transparent solution. The above solution was slowly added dropwise to the phosphorus-based precursor solution, stirred for 1 hour, added ammonia water to adjust its pH to 7-8, ultrasonically dispersed for 10 minutes to obtain uniform and transparent (CaO-P 2 O 5 -Na 2 O-ZnO) sol. The pre-polished magnesium alloy was completely immersed in the prepared glass sol, immersed and pulled 5 times at a speed...

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Abstract

The invention relates to a method for preparing a bioactive glass coating coated magnesium alloy medicinal material by pressurized thermal treatment. The designing idea of the pressurized thermal treatment process considers that viscous fluid flow in a glass transition section and superplastic deformation of medicinal magnesium alloy can be simultaneously carried out in a certain temperature range. By means of the pressurized thermal treatment, a compact, amorphous, high-adhesion strength bioactive glass coating coated magnesium alloy material is successfully prepared; element interdiffusion between coating / magnesium alloy interface is promoted by means of the pressurized thermal treatment, so that the coating / magnesium alloy interface binding state is changed from mainly mechanical locking into simultaneous action of mechanical locking and chemical bonding, and the adhesion strength of coating / magnesium alloy can be remarkably improved; furthermore, the amorphous coating structure gives high bioactivity of magnesium alloy, and a compact coating structure is beneficial to better exertion of the physical barrier action of the magnesium alloy, so that the corrosion resistance of magnesium alloy can be improved.

Description

Technical field [0001] The invention belongs to the technical field of surface modification of degradable magnesium alloy implants, and particularly relates to a method for preparing a bioactive glass coating coated magnesium alloy medical material by pressure heat treatment. Background technique [0002] Magnesium alloy has good biocompatibility and its density is close to that of human bone tissue. Compared with materials such as titanium alloy, stainless steel and cobalt-chromium alloy that are widely used clinically, the elastic modulus of magnesium alloy (41~45GPa) is comparable to bone tissue. (10~30GPa) is more matched, which is beneficial to reduce the "stress shielding" effect of the interface between the implant and the human bone tissue, and promote the growth of bone tissue. Moreover, magnesium alloy can be completely degraded and absorbed in the body. As an implant, it does not need to be removed by a second operation. It is considered to be the most promising new ty...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/04A61L27/52A61L27/32C23C20/08
Inventor 蔡舒申偲伯牛书鑫李妍张敏张同
Owner TIANJIN UNIV
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