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

Mg(OH)2/Mg-Sn hydrotalcite composite film having intercalation structure on surface of magnesium and magnesium alloy and preparation method thereof

A magnesium alloy and hydrotalcite technology, which is applied in the direction of metal material coating process, etc., can solve the problems that cannot be used for magnesium alloy protection, Mg-Al hydrotalcite film contains cytotoxic elements, etc., and achieves stable structure, good binding force, Avoid the effect of poor corrosion resistance

Active Publication Date: 2017-01-04
NANJING INST OF TECH
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent document CN 201110057831 discloses a film-forming solution for in-situ growth of a Mg-Al hydrotalcite film on the surface of a magnesium alloy and its application, but the Mg-Al hydrotalcite film contains a cytotoxic element—aluminum
Therefore, Mg-Sn-like hydrotalcites have good human safety, but Mg-Sn-like hydrotalcite powders prepared by co-deposition method cannot be used for magnesium alloy protection.

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
  • Mg(OH)2/Mg-Sn hydrotalcite composite film having intercalation structure on surface of magnesium and magnesium alloy and preparation method thereof
  • Mg(OH)2/Mg-Sn hydrotalcite composite film having intercalation structure on surface of magnesium and magnesium alloy and preparation method thereof
  • Mg(OH)2/Mg-Sn hydrotalcite composite film having intercalation structure on surface of magnesium and magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] A kind of Mg(OH) with intercalation structure on the surface of magnesium and magnesium alloy 2 The preparation method of / Mg-Sn class hydrotalcite composite membrane comprises the steps:

[0031] S1. Pretreatment of magnesium and magnesium alloy samples: including grinding and cleaning. Use 400, 800 and 1000 mesh metallographic sandpaper for mechanical grinding in sequence, then ultrasonically clean the polished magnesium and magnesium alloy samples in absolute ethanol for 5-10 minutes, and then ultrasonically clean them in deionized water for 5-10 minutes; Magnesium and magnesium alloys treated by this process include Mg-Zn series, Mg-RE series, Mg-Ca series, Mg-Sn series, Mg-Mn series alloys and pure magnesium;

[0032] S2. Perform pretreatment on the pretreated samples: prepare 0.01-0.04mol / L tin ion salt solution, wherein the tin ion salt solution is SnCl 4 or Sn(SO 4 ) 2 , and use 0~2mol / L NaOH / KOH and 0.5~1mol / L Na 2 CO 3 / NaHCO 3 / K 2 CO 3 / KHCO 3 Adjus...

Embodiment 1

[0037] The magnesium and magnesium alloy samples used in this embodiment are pure magnesium.

[0038] S1. Pretreatment of magnesium and magnesium alloy samples: including grinding and cleaning. The pure magnesium was mechanically polished with 400, 800 and 1000-mesh metallographic sandpaper in sequence, and then the polished pure magnesium sample was ultrasonically cleaned in absolute ethanol for 5 minutes, and then placed in ionized water for 5 minutes.

[0039] S2. Perform pretreatment on the pretreated sample: prepare 0.02mol / L SnCl 4 solution, and with 1mol / LNaOH and 0.5mol / L NaOH 2 CO 3 The mixed solution was adjusted to pH 3.8 to prepare a pretreatment solution. The pure magnesium sample was placed in a continuous flow of CO 2 Soak in the pretreatment solution for 1 hour, the treatment temperature is 25°C, the ratio of the surface area of ​​the sample to the volume of the pretreatment solution is 1:40, and the precursor film is grown on the surface of the sample.

...

Embodiment 2

[0043] With embodiment 1, difference is: present embodiment adopts Mg-2Zn magnesium alloy (being the magnesium alloy containing 2wt%Zn); Prepare 0.01mol / L Sn(SO in step S2 4 ) 2 solution, and with 1mol / L NaOH and 1mol / L Na 2 CO 3 Adjust the pH of the mixed solution to 5.0 to prepare a pretreatment solution; the pretreatment temperature is 40°C, the time is 2h, the ratio of the sample surface area to the volume of the pretreatment solution is 1:30; the posttreatment solution in step S3 is 1mol / L NaHCO 3 The pH of the solution was adjusted to ~13 by NaOH, the post-treatment temperature was 70°C, the time was 12 hours, and the ratio of the sample surface area to the volume of the post-treatment solution was 1:30.

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 Mg(OH)2 / Mg-Sn hydrotalcite composite film having an intercalation structure on the surface of magnesium and magnesium alloy and a preparation method thereof, relates to the technical field of the surface of magnesium and magnesium alloy, and aims to improve the corrosion resistance of magnesium and magnesium alloy and widen the application prospects in the fields of biological medicine and the like. The preparation method comprises the following steps: S1, initial treatment of magnesium and magnesium alloy; S2, pretreatment: preparing a Sn4<+> salt solution, regulating the pH value to 4.0 to obtain a pretreatment solution, and putting the magnesium and magnesium alloy in the pretreatment solution with continuously introduced CO2 to obtain a precursor film; S3, posttreatment: soaking the magnesium and magnesium alloy coated with the precursor film in a Na2CO3 solution to grow a Mg(OH)2 / Mg-Sn hydrotalcite composite film on the surface of the magnesium and magnesium alloy; and S4, subsequent cleaning. According to the invention, the Mg(OH)2 / Mg-Sn hydrotalcite composite film containing no aluminum and having biosafety is grown on the surface of magnesium and magnesium alloy in an in-situ generation manner through a two-step method; the corrosion resistance of magnesium and magnesium alloy is improved; and the application of the hydrotalcite film in biological magnesium alloy surface protection is widened.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an in-situ growth of Mg(OH) with an intercalation structure on the surface of magnesium and magnesium alloys 2 / Mg-Sn preparation method of hydrotalcite composite film. Background technique [0002] Magnesium is an essential constant element for the human body. Its density and elastic modulus are similar to those of human bones, and it has the characteristics of high specific strength, good biocompatibility, and biodegradability, which can effectively avoid the "stress shielding" effect and secondary surgery. The pain and economic burden brought by patients is expected to replace traditional biologically inert materials and become a new generation of degradable orthopedic implant materials, known as "revolutionary metal biomaterials". Due to the active chemical properties of magnesium and magnesium alloys, they are easily corroded and degraded in the...

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
IPC IPC(8): C23C22/60C23C22/78
CPCC23C22/60C23C22/78
Inventor 巴志新董强胜王章忠章晓波巨佳陈永俊
Owner NANJING INST OF TECH
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