Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of porous artificial bone with adjustable degradation rate based on slurry direct writing

A degradation rate and adjustable technology, applied in the field of additive manufacturing, can solve the problem of not being able to adjust the structural porosity and degradation rate at the same time, and achieve the effect of reducing equipment and processing costs and improving biological activity.

Pending Publication Date: 2021-11-02
吉林大学重庆研究院
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The invention provides a preparation method of porous artificial bone based on slurry direct writing with adjustable degradation rate to solve the problem that the existing metal 3D printing method cannot simultaneously adjust the structural porosity and degradation rate to match the original bone of the human body The problem

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
  • Preparation method of porous artificial bone with adjustable degradation rate based on slurry direct writing
  • Preparation method of porous artificial bone with adjustable degradation rate based on slurry direct writing
  • Preparation method of porous artificial bone with adjustable degradation rate based on slurry direct writing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Include the following steps:

[0039] (1) Before mixing the slurry, weigh the mass ratio of the solvent to the polymer to be 3:1, dissolve the polymer and the solvent in a sealed container with anti-corrosion function for 24 hours at room temperature, and prepare a uniform, flowable A slurry binder with a certain viscosity;

[0040] (2), the iron powder D 90 =43.4μm and hydroxyapatite powder D 90 =9.72μm were placed in a drying oven, dried at a constant temperature at 50°C for 12 hours, and then put into a ball mill for 40 minutes at a speed of 300r / min to obtain dry powder without obvious agglomeration;

[0041] (3) Weigh the iron powder and hydroxyapatite powder according to the mass ratio of 12:1, and put them into the ball mill according to the mass ratio of the slurry binder to the mixed powder at 1:3. Ball milling and mixing at a speed of min for 60 minutes to obtain a uniformly mixed slurry, and the uniformly mixed slurry becomes viscous, without flaky crystals ...

Embodiment 2

[0049] Include the following steps:

[0050] (1) Before mixing the slurry, weigh the mass ratio of the solvent to the polymer to be 4:1, dissolve the polymer and the solvent in a sealed container with anti-corrosion function for 30 hours at room temperature, and prepare a uniform, flowable A slurry binder with a certain viscosity;

[0051] (2), the iron powder D 90 =43.4μm and hydroxyapatite powder D 90 =9.72 μm were placed in a drying oven, dried at a constant temperature at 65°C for 9 hours, and then put into a ball mill for 50 minutes at a speed of 350r / min to obtain dry powder without obvious agglomeration;

[0052] (3) Weigh the iron powder and hydroxyapatite powder according to the mass ratio of 25:1, and put them into the ball mill according to the mass ratio of the slurry binder to the mixed powder of 1:3.5. Ball mill and mix for 80 minutes at a speed of min to obtain a uniformly mixed slurry; the uniformly mixed slurry becomes viscous, without flaky crystals and pa...

Embodiment 3

[0060] Include the following steps:

[0061] (1) Before mixing the slurry, weigh the mass ratio of the solvent to the polymer to be 5:1, dissolve the polymer and the solvent in a sealed container with anti-corrosion function for 36 hours at room temperature, or 12 hours at a constant temperature of 37°C to prepare Form a uniform, flowable slurry binder with a certain viscosity;

[0062] (2), the iron powder D 90 =43.4μm and hydroxyapatite powder D 90 =9.72 μm were placed in a drying oven, dried at a constant temperature of 80°C for 6 hours, and then put into a ball mill for 60 minutes at a speed of 400r / min to obtain dry powder without obvious agglomeration;

[0063] (3) Weigh the iron powder and hydroxyapatite powder according to the mass ratio of 39:1, and put them into the ball mill according to the mass ratio of the slurry binder to the mixed powder at 1:4. Ball mill and mix for 100 minutes at a speed of min to obtain a uniformly mixed slurry; the uniformly mixed slurry...

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

PropertyMeasurementUnit
Porosityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a porous artificial bone with an adjustable degradation rate based on slurry direct writing, and belongs to the field of additive manufacturing. The preparation method comprises the steps: providing a binder prepared from dichloromethane and polylactic acid, pure iron powder and hydroxyapatite powder and preparing the mixture into mixed slurry according to the proportion, placing the mixed slurry into a forming charging barrel to be fixed to a platform, wherein the mixed slurry is driven by the platform to move along a preset path to form a multi-layer ordered porous structure; and sequentially pre-sintering and sintering the three-dimensional porous structure. The method has the advantages that the volume ratio of the mixed powder in a metal support can reach 80%, the shrinkage degree after sintering can be fully reduced, and laser, electron beam and other methods are not needed for repairing, so that the method is safer and more reliable; the whole machined part is sintered and formed at the same time, and local residual stress does not exist; due to good biological activity and biocompatibility of hydroxyapatite, the degradation rate of the porous artificial bone can be adjusted by adjusting the proportion of hydroxyapatite, and meanwhile the biological activity of the artificial bone is improved.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, especially the 3D printing of metal artificial bone based on slurry direct writing, which can process customized metal artificial bone with complex geometry and synchronous adjustment of structural porosity and degradation rate. method. Background technique [0002] Direct inkwriting (DIW) adopts the technology of depositing and molding the extruded slurry. This technology is to mix the polymer solvent or particles to form a uniform flowable slurry, and its viscosity can be guaranteed at a certain level. The inner diameter of the nozzle extrudes the line, and it will maintain a certain shape after extrusion, which can ensure its forming ability. The extruded lines move according to the path designed by the slicing software to form a certain shape in the horizontal plane of the substrate, then the substrate sinks one layer, and the second layer is printed, and then the process is repeated un...

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): B22F1/00B22F9/04B22F10/16B22F10/64B22F10/38B22F3/11B33Y10/00B33Y70/10B33Y40/20A61L27/04A61L27/12A61L27/50A61L27/54A61L27/56A61L27/58
CPCB22F9/04B22F10/16B22F10/64B22F10/38B22F3/1121B33Y10/00B33Y70/10B33Y40/20A61L27/56A61L27/042A61L27/12A61L27/50A61L27/54A61L27/58B22F2009/043A61L2430/02Y02P10/25
Inventor 徐超张弘业班名扬吴文征刘庆萍任露泉
Owner 吉林大学重庆研究院
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com