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Polylactic acid fiber reinforced polylactic acid/hydroxyapatite composite material and preparation method thereof

A technology of hydroxyapatite and polylactic acid fibers, which is applied in the field of medical materials, can solve the problems of low mechanical strength, poor mechanical properties, and poor load-carrying properties of polylactic acid, and achieve improved bone-guiding characteristics, low cost, and lightening The effect of destruction

Inactive Publication Date: 2014-08-27
ECOTA ENVIRONMENTAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Polylactic acid (PLA) is a synthetic polymer material that has been studied more at present. It has the advantages of non-toxicity, good compatibility with the human body, and can be completely degraded and absorbed in the body. Low and lack of biological activity, the aggregation of its acidic degradation products can easily cause inflammation in the body
Hydroxyapatite (HA) is a bioactive ceramic, which is the main inorganic component in human bones. Form a firm chemical bond, but the disadvantages of hydroxyapatite are poor mechanical properties, brittleness, and poor load-carrying properties, so it is not suitable to be directly used as a bone tissue material

Method used

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  • Polylactic acid fiber reinforced polylactic acid/hydroxyapatite composite material and preparation method thereof
  • Polylactic acid fiber reinforced polylactic acid/hydroxyapatite composite material and preparation method thereof

Examples

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Embodiment 1

[0034] The preparation method of the polylactic acid fiber reinforced polylactic acid / hydroxyapatite composite material of this embodiment includes the following steps in sequence:

[0035] (1) Put granular polylactic acid (both granular poly-L-lactic acid) in a vacuum drying oven, and dry at 65 °C for 24 hours to remove the moisture;

[0036] (2) mixing polylactic acid and hydroxyapatite obtained in step (1) at a ratio of 95% (weight) of polylactic acid and 5% (weight) of hydroxyapatite to obtain a mixed raw material;

[0037] In this step (2), put the polylactic acid and hydroxyapatite obtained in step (1) into a high-speed mixer according to the stated ratio, and mix for 3 minutes at a speed of 1500 rpm at 55°C , have to mix raw materials.

[0038] (3) Add the mixed raw materials obtained in step (2) to a twin-screw extruder for blending and extrusion, and use a granulator to make pellets from the extruded product;

[0039]In this step (3), the extrusion die equipped with...

Embodiment 2

[0053] The preparation method of the polylactic acid fiber reinforced polylactic acid / hydroxyapatite composite material of this embodiment includes the following steps in sequence:

[0054] (1) Put granular polylactic acid (both granular poly-L-lactic acid) in a vacuum drying oven, and dry at 65 °C for 24 hours to remove the moisture;

[0055] (2) mixing polylactic acid and hydroxyapatite obtained in step (1) at a ratio of 80% (weight) of polylactic acid and 20% (weight) of hydroxyapatite to obtain a mixed raw material;

[0056] In this step (2), put the polylactic acid and hydroxyapatite obtained in step (1) into a high-speed mixer according to the stated ratio, and mix for 5 minutes at a speed of 1000 rpm at 60°C , have to mix raw materials.

[0057] (3) Add the mixed raw materials obtained in step (2) to a twin-screw extruder for blending and extrusion, and use a granulator to make pellets from the extruded product;

[0058] In this step (3), the extrusion die equipped wi...

Embodiment 3

[0072] The preparation method of the polylactic acid fiber reinforced polylactic acid / hydroxyapatite composite material of this embodiment includes the following steps in sequence:

[0073] (1) Put granular polylactic acid (both granular poly-D,L-lactic acid) in a vacuum drying oven, and dry at 60 °C for 48 hours to remove the moisture;

[0074] (2) mixing polylactic acid and hydroxyapatite obtained in step (1) at a ratio of 75% (weight) of polylactic acid and 25% (weight) of hydroxyapatite to obtain a mixed raw material;

[0075] In this step (2), put the polylactic acid and hydroxyapatite obtained in step (1) into a high-speed mixer according to the stated ratio, and mix for 2 minutes at a speed of 2000 rpm at 50°C , have to mix raw materials.

[0076] (3) Add the mixed raw materials obtained in step (2) to a twin-screw extruder for blending and extrusion, and use a granulator to make pellets from the extruded product;

[0077] In this step (3), the extrusion die equipped ...

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Abstract

The invention discloses a polylactic acid fiber reinforced polylactic acid / hydroxyapatite composite material which is characterized by comprising a plurality of polylactic acid-hydroxyapatite film layers arranged from top to bottom, wherein a polylactic acid fiber layer is arranged between every adjacent two polylactic acid-hydroxyapatite film layers; each polylactic acid-hydroxyapatite film layer and each polylactic acid fiber layer are hotly pressed together; the polylactic acid-hydroxyapatite film layers are made from materials composed of 70-95 percent (weight) of polylactic acid and 5-30 percent (weight) of hydroxyapatite; the polylactic acid fiber layers are formed by paving polylactic acid fiber. The invention further provides a preparation method of the composite material. The preparation process of the composite material is simple, the cost is low, the obtained composite material is good in mechanical property, has good resistance to tensile stress and toughness, has biological activity and degradability, does not contain organic solvents having side effects for human bodies, and can act as a high-strength material.

Description

technical field [0001] The invention relates to medical materials, in particular to a preparation method of polylactic acid fiber reinforced polylactic acid / hydroxyapatite composite material. Background technique [0002] Polylactic acid (PLA) is a synthetic polymer material that has been studied more at present. It has the advantages of non-toxicity, good compatibility with the human body, and can be completely degraded and absorbed in the body. Low and lack of biological activity, the accumulation of its acidic degradation products is likely to cause inflammation in the body. Hydroxyapatite (HA) is a bioactive ceramic, which is the main inorganic component in human bones. However, the disadvantages of hydroxyapatite are poor mechanical properties, brittleness, and poor load-carrying properties, so it is not suitable to be directly used as a bone tissue material. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/18A61L27/12B32B27/06B32B37/02B32B37/06
Inventor 刘宏生王惠群
Owner ECOTA ENVIRONMENTAL TECH
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