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Method for preparing carbon fiber reinforced polylactic acid/hydroxyapatite composite material

A hydroxyapatite and composite material technology, applied in medical science, surgery, etc., can solve the problems of molecular weight loss, affecting material strength, uneven distribution, etc., to avoid molecular weight reduction, good mechanical properties, and simple preparation process. Effect

Inactive Publication Date: 2017-05-24
HEILONGJIANG XINDA ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solution blending method uses organic solvents, leaving residual solvents in the final material, and it is not easy to remove. Once implanted into the human body, it will have great side effects on the human body
However, with the melting and hot pressing method, the polylactic acid (PLA) has to go through the molten state, and the temperature is close to its pyrolysis temperature, so that part of the material will be pyrolyzed, resulting in the loss of molecular weight, and the distribution of various components is uneven, which affects the quality of the material. strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Mix pre-dried 7.5g lactide and 2.5g hydroxyapatite, add 0.05g stannous octoate, mix evenly, put it into a mold with 0.3g carbon fiber, compact it, and evacuate it. Reacted at 150 degrees Celsius for 48 hours. After the reaction, the molecular weight of polylactic acid was measured to be 122,000, the bending strength of the material was 415MPa, and the bending modulus was 23.5Gpa.

Embodiment 2

[0012] Mix pre-dried 8.4g lactide and 1.5g hydroxyapatite, add 0.1g stannous octoate, mix evenly, put into a mold with 0.1g carbon fiber, compact and vacuumize. Reacted at 130 degrees Celsius for 24 hours. After the reaction, the molecular weight of polylactic acid was measured to be 51,000, the bending strength of the material was 332MPa, and the bending modulus was 18.8Gpa.

Embodiment 3

[0014] Mix 8.1g of pre-dried lactide and 1.7g of hydroxyapatite, add 0.06g of stannous octoate, mix evenly, put it into a mold with 0.2g of carbon fiber, compact and vacuumize. Reacted at 140 degrees Celsius for 36 hours. After the reaction, the molecular weight of polylactic acid was measured to be 77,000, the bending strength of the material was 366MPa, and the bending modulus was 22Gpa.

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Abstract

The invention discloses a method for preparing a carbon fiber reinforced polylactic acid / hydroxyapatite composite material. The method comprises the following steps: taking lactide, hydroxyapatite and carbon fibers as raw materials, taking stannous octoate as a catalyst, and weighing the following raw materials in percentage by weight: 74-86% of lactide, 15-21% of hydroxyapatite and 2-4% of carbon fibers, totaling 100%; uniformly mixing the pre-dried lactide with the hydroxyapatite and the catalyst, adding the mixture into a mold filled with carbon fibers, compacting, sealing, vacuumizing, and reacting at a temperature of 130-150 DEG C for 24-48 hours under the vacuum anhydrous oxygen-free condition. According to the method disclosed by the invention, the preparation process is simple, an organic solvent does not need to be added, in-situ direct polymerization molding is adopted, the condition that the molecular weight is reduced in the hot press molding process is avoided, and the produced material is excellent in mechanical property and does not contain any solvent which has side effects on the human body.

Description

technical field [0001] The invention relates to a preparation method of carbon fiber reinforced polylactic acid / hydroxyapatite composite material. Background technique [0002] Carbon fiber (CF) reinforced polylactic acid (PLA) / hydroxyapatite (HA) composite material, combining the biological properties of HA, the degradation performance of PLA and the mechanical properties of CF, and the existing CF reinforced PLA composites and HA Compared with PLA composite materials, it can overcome the disadvantages of inflammation in the body caused by excessive acidity, low mechanical strength, and poor development on X-ray films, and can become a high-strength fracture internal fixation that is not only biologically active, but also absorbable and explainable Material. [0003] At present, the solution blending method and the melt hot pressing method are used to prepare carbon fiber (CF) reinforced polylactic acid (PLA) / hydroxyapatite (HA) composites. The solution blending method us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08C08K3/32C08K7/06A61L31/12A61L31/14A61L31/16A61L31/18
Inventor 于敬阳刘刚林航
Owner HEILONGJIANG XINDA ENTERPRISE GRP