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Method for preparing carbon fiber reinforced polylactic acid/hydroxy apatite composite material

A technology of hydroxyapatite and composite materials, applied in medical science, prosthesis, 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 preparation The effect of simple process

Inactive Publication Date: 2008-06-04
ZHEJIANG UNIV +1
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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 in the body, it will have great side effects on the human body
However, using the melting hot pressing method, polylactic acid (PLA) has to go through a molten state, and the temperature is close to its pyrolysis temperature, so that part of the material is pyrolyzed, resulting in a 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

[0011] Mix pre-dried 7.5g lactide and 2.2g hydroxyapatite, add 0.05g stannous octoate, mix evenly, put it into a mold with 0.3g carbon fiber, compact it, vacuumize it, and heat it at 150°C After 48 hours of reaction, the molecular weight of polylactic acid was measured to be 120,000, the flexural strength of the material was 412MPa, and the flexural modulus was 23.3Gpa.

Embodiment 2

[0013] Mix 8.5g of pre-dried lactide and 1.4g of hydroxyapatite, add 0.1g of stannous octoate, mix well, put it into a mold with 0.1g of carbon fiber, compact it, vacuumize it, and heat it at 130°C React for 24 hours. After the reaction, the molecular weight of polylactic acid was measured to be 52,000, the bending strength of the material was 331MPa, and the bending modulus was 18.1Gpa.

Embodiment 3

[0015] Mix 8g of pre-dried lactide and 1.8g of hydroxyapatite, add 0.07g of stannous octoate, mix well, put it into a mold with 0.2g of carbon fiber, compact it, vacuumize it, and react at 140°C 36 hours. After the reaction, the molecular weight of polylactic acid was measured to be 76,000, the bending strength of the material was 363MPa, and the bending modulus was 21Gpa.

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Abstract

The present invention discloses a method for preparing carbon-fibre reinforced polylactic acid / hydroxyapatite composite material. It is made up by using (by wt%) 75-85% of lactide, 22-14% of hydroxyapatite and 1-3% of carbon fibre as raw material, using stannous octoate as catalyst through a certain preparation process.

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 combines the biological properties of HA, the degradation performance of PLA and the mechanical properties of CF, and the existing CF reinforced PLA composite material 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 degradable. Material. [0003] At present, the preparation of carbon fiber (CF) reinforced polylactic acid (PLA) / hydroxyapatite (HA) composites adopts solution blending method and melt hot pressing method. The solution blending metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/58A61L27/40A61L31/12A61L27/18A61L27/12A61L27/08A61L31/02A61L31/06
Inventor 沈烈乔飞彭懋朱飞燕
Owner ZHEJIANG UNIV
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