Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A magnesium-based metal conversion coating with high corrosion resistance and surface functionalization and its preparation method

A technology with surface functionalization and high corrosion resistance, applied in the field of medical materials, it can solve the problems of affecting the growth of surrounding tissues, excessive corrosion rate, stress fracture, etc. strong effect

Active Publication Date: 2019-07-09
SICHUAN UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a magnesium-based metal conversion coating with high corrosion resistance and surface functionalization and a preparation method thereof, which can effectively solve the problem that the existing magnesium-based conversion coating is easily affected by a humid environment The corrosion rate is too fast, causing stress cracking and problems affecting the growth of surrounding tissue

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A magnesium-based metal conversion coating with high corrosion resistance and surface functionalization and its preparation method
  • A magnesium-based metal conversion coating with high corrosion resistance and surface functionalization and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing a magnesium-based metal conversion coating with high corrosion resistance and surface functionalization, comprising the following steps:

[0031] (1) polishing, cleaning and drying the pure magnesium material to be modified;

[0032] (2) Place the product obtained in step (1) in a polyethyleneimine solution with a concentration of 0.01 mM and a pH value of 7.4, react at 4°C for 2 min, then take it out, and wash it with deionized water for 3 times;

[0033] (3) The product obtained in step (2) was placed in a mixed solution of epicatechin and heparan sulfate with a concentration of 0.2mM and a pH value of 7.5, reacted at 10°C for 5min, then took it out, and washed it with deionized water for 3 times; wherein, the mol ratio of epicatechin and heparan sulfate is 1:2;

[0034] (4) Using the product obtained in step (3) as a substrate, repeat the process described in steps (2) to (3) 60 times, dry it with nitrogen, and then store it in a vacuum oven t...

Embodiment 2

[0036] A method for preparing a magnesium-based metal conversion coating with high corrosion resistance and surface functionalization, comprising the following steps:

[0037] (1) Polishing, cleaning and drying the magnesium-zinc-manganese alloy to be modified;

[0038] (2) Place the product obtained in step (1) in a polyhexyl violet nitrile solution with a concentration of 0.01 mM and a pH value of 7.5, react at 5° C. for 2 min, then take it out, and wash it with deionized water for 3 times;

[0039] (3) Place the product obtained in step (2) in a mixed solution of epigallocatechin gallate and dermatan sulfate with a concentration of 0.02mM and a pH value of 7.8, react at 15°C for 5min, then take it out, and use it Ionized water was washed 3 times; wherein, the mol ratio of epigallocatechin gallate and dermatan sulfate was 1:1;

[0040] (4) Using the product obtained in step (3) as a substrate, repeat the process described in steps (2) to (3) 3 times, dry with nitrogen, and ...

Embodiment 3

[0042] A method for preparing a magnesium-based metal conversion coating with high corrosion resistance and surface functionalization, comprising the following steps:

[0043] (1) Polish, clean and dry the WE43 magnesium alloy that needs to be modified;

[0044] (2) Place the product obtained in step (1) in a chitosan solution with a concentration of 0.01 mM and a pH value of 7.4, react at 5° C. for 2 min, then take it out, and wash it with deionized water for 3 times;

[0045] (3) Put the product obtained in step (2) in a mixed solution of epicatechin gallate and chondroitin sulfate with a concentration of 0.05mM and a pH value of 7.2, react at 10°C for 5min, then take it out, and use deionized Water was washed 3 times; wherein, the mol ratio of epicatechin gallate and chondroitin sulfate was 1.5:2;

[0046](4) Using the product obtained in step (3) as a substrate, repeat the process described in steps (2) to (3) 5 times, dry with nitrogen, and then store it in a vacuum oven...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a magnesium-based metal conversion coating with high corrosion resistance and surface functionalization and a preparation method thereof. The method comprises the following steps: (1) pretreating the magnesium alloy base material; (2) placing the pretreated magnesium alloy in a polycation electrolyte solution, reacting for 1 to 30 minutes, taking it out and cleaning it with deionized water; (3) Place the product obtained in step (2) in a mixed solution of polyphenolic compound and polyanion electrolyte, react for 1 to 30 minutes, take it out and wash it with deionized water; (4) use the product obtained in step (3) as the substrate, repeat Steps (2)-(3) are carried out 10-100 times, and dried with nitrogen to obtain a conversion coating. The method of the invention has the advantages of simple operation, low cost and wide applicability, and is suitable for research in the fields of magnesium-based vascular stents and bone fixation materials.

Description

technical field [0001] The invention belongs to the field of medical materials, in particular to a magnesium-based metal conversion coating with high corrosion resistance and surface functionalization and a preparation method thereof, which can be used for fully degradable magnesium-based orthopedic implant materials and fully degradable magnesium-based alloy vascular stents Material modification research. Background technique [0002] Compared with traditional biomedical stainless steel, titanium alloy and other metal materials, magnesium-based metal materials have many advantages such as good biocompatibility, mechanical properties, biodegradability, low thrombogenicity, low inflammatory response, etc., and are widely studied. Used in blood stent materials, orthopedic repair materials, etc. Although the degradable magnesium alloy has its unique advantages, its particularly prominent problem is that the degradation rate is too fast, and the degradation is basically complet...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/78C23C22/68C23C22/57C23C22/60
CPCC23C22/57C23C22/60C23C22/68C23C22/78
Inventor 王云兵罗日方
Owner SICHUAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com