Absorbable self-reinforced composite material and preparation method thereof

A reinforced composite material and composite material technology, applied in the field of absorbable self-reinforced composite materials and its preparation, can solve the problems of easy aseptic inflammation, insufficient mechanical strength, and limited use parts, and achieve good clinical application prospects, Realization of production yield and the effect of promoting bone repair

Pending Publication Date: 2022-08-09
CHANGCHUN SINOBIOMATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former has insufficient mechanical strength, limited use sites, difficult degradation control, and acidic environment in the later stage of degradation, so it is prone to aseptic inflammation. The metal ions produced during the process are prone to local inflammation or ion poisoning, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] A preparation method of an absorbable self-reinforced composite material, comprising the following steps:

[0032] Step 1: A mixture consisting of 1-20 parts of magnesium or magnesium alloy powder, 1-45 parts of bioceramic powder, and 35-98 parts of absorbable polyester material powder is sealed and stirred and mixed under the protection of inert gas to obtain a primary mixture ;

[0033] In step 2, according to the proportion of absorbable polyester in the composite material, different forms of screw elements are combined to ensure the dispersibility of the initial mixture, and the twin-screw extruder is heated to above the melting point of absorbable polyester, Maintain a constant temperature, first run at a low speed of less than 40 rpm, and then put the initial mixture into the twin-screw extruder under the protection of inert gas, and gradually increase the speed to 45 to 600 rpm. After the material is discharged from the die of the twin-screw extruder, it is roll...

Embodiment 1

[0043] a. 1 part of magnesium-zinc alloy powder, 1 part of bioceramic material hydroxyapatite powder, and 98 parts of polyglycolide are sealed and stirred under the protection of inert gas to obtain a primary mixture.

[0044] b. Put the initial mixture obtained in a into the twin-screw extruder under the protection of gas:

[0045] The temperature of each section of the equipment is controlled between 60 and 235 °C. After the constant temperature, the first run at a low speed of 35r / min, the initial mixture is put into the twin-screw extruder, and then the speed is gradually increased. After the material is discharged, it is drawn to the setting mold to cool, and the multi-roll variable-speed rolling extension is started on the hot roller when the temperature of the material drops to 130°C to obtain a self-reinforced composite sheet. The strength and hardness of the material are better improved, and the flexural strength of the composite material without self-reinforcing is i...

Embodiment 2

[0047] a. 20 parts of magnesium zirconium alloy powder, 15 parts of hydroxyapatite powder, bioceramic material, 65 parts of polycaprolactone powder, and 5 parts of polycitrate are sealed and mixed to obtain a preliminary mixture.

[0048] b. Put the initial mixture obtained in a into the twin-screw extruder:

[0049] The temperature of each section of the equipment is controlled between 50 and 150 ℃. After the constant temperature, the first low speed operation is 35r / min, the initial mixture is put into the twin-screw extruder, and then the speed is gradually increased, and the material is discharged through an 8mm thick die. After that, it goes through the setting section and then passes through the rolling zone to be drawn all the time. The temperature of the setting section is lowered to 50°C for preliminary setting, and the composite sheet is obtained by temperature drawing, setting and cooling.

[0050] The obtained self-reinforced composite material exhibits relatively ...

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Abstract

The invention belongs to the technical field of composite materials, and particularly relates to an absorbable self-reinforced composite material and preparation thereof. In particular to a composite material obtained by mixing magnesium or alloy powder thereof with biological ceramic powder and absorbable polyester powder and preparation thereof, which are obtained by physical and mechanical mixing, the preparation process is simple, the efficiency is high, and the yield can be realized. And the obtained composite material can be used for preparing medical devices with corresponding shapes by means of mould pressing, machining and the like.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to an absorbable self-reinforced composite material and its preparation. Background technique [0002] Absorbable implants have been widely used clinically, but the products on the market are mainly absorbable polyester materials or products compounded with inorganic biological materials and medical device products that absorb magnesium or magnesium alloys. The former has insufficient mechanical strength, limited use site and difficult to control degradation and is prone to aseptic inflammation due to the acidic environment in the later stage of degradation. The metal ions produced in the process are prone to local inflammation or ion poisoning. SUMMARY OF THE INVENTION [0003] In order to overcome the above problems, the present invention provides an absorbable self-reinforced composite material and a preparation method thereof, specifically a composite material of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/04A61L27/12A61L27/18A61L27/50A61L27/58
CPCA61L27/047A61L27/12A61L27/18A61L27/50A61L27/58A61L2300/112A61L2300/412A61L2430/02C08L67/04
Inventor 丛占福
Owner CHANGCHUN SINOBIOMATERIALS
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