Self-reinforced bionic material and manufacture method thereof

A technology of bionic materials and manufacturing methods, applied in the field of medical materials, can solve problems such as melting and fiber shape maintenance, and achieve stable product performance and improved production efficiency

Inactive Publication Date: 2013-07-17
GUANGZHOU MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the deficiencies in the above prior art, apply the interfacial mechanism of instantaneous heating of ultrasonic waves and controllable strength, solve the problem of melting and fiber shape maintenance under the condition that the difference in melting temperature between the matrix and the reinforcing phase is small, and construct fibers Preparation of a biodegradable self-reinforced biomimetic material with high strength and high toughness with bamboo imitation structure by distribution gradient

Method used

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  • Self-reinforced bionic material and manufacture method thereof
  • Self-reinforced bionic material and manufacture method thereof
  • Self-reinforced bionic material and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Two kinds of polylactic acid (code A and B) with different molecular weight and crystallinity were selected. A was L-polylactic acid with a number average molecular weight of 100,000 and a crystallinity of 70%; B was a mesopolylactic acid with a number average molecular weight of 60,000 and a crystallinity of 30%.

[0034] (1) Long fibers of polylactic acid A were prepared by melt spinning method, and the fiber fineness was 6D;

[0035] (2) The polylactic acid B film was prepared by the blown film method, and the film thickness was 15um;

[0036] (3) Stacking 60% long fibers and 40% films by mass by guiding the mold;

[0037] (4) Using an ultrasonic welding machine to continuously compound the stacked materials, the ultrasonic power is 3KW, and the production speed is 10m / min to prepare the self-reinforced polylactic acid material.

[0038] The performance test was performed after the above materials were naturally placed at room temperature for 24 hours. The tensile ...

Embodiment 2～6

[0040] Select polylactic acid with different molecular weight and crystallinity to prepare different reinforcing phases and continuous phases. The composite method is the same as in Example 1, and the results are shown in the following table.

[0041]

[0042]

Embodiment 7

[0044] Two polyglycolic acids with different molecular weights and crystallinity (code-named D and E) were selected. D has a number-average molecular weight of 100,000 and a crystallinity of 70%; E has a number-average molecular weight of 50,000 and a crystallinity of 40%.

[0045] (1) The non-woven fabric of polyglycolic acid D was prepared by melt spinning method, and the grammage was 40g / m 2 ;

[0046] (2) A film of polyglycolic acid E was prepared by casting method, and the film thickness was 15um;

[0047] (3) Stack 60% non-woven fabric and 40% film by mass percentage by guiding the mold;

[0048] (4) Using an ultrasonic welding machine to continuously compound the stacked materials, the ultrasonic power is 3KW, and the production speed is 12m / min to prepare self-reinforced polyglycolic acid materials.

[0049] The above materials were tested after being naturally placed at room temperature for 24 hours. The tensile strength was 380MPa, the elongation at break was 24%, an...

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Abstract

The invention discloses a self-reinforced bionic material, comprising a reinforced phase prepared from a biodegradable polymer A with high molecular weight and high crystallinity, and a matrix resin phase prepared from a biodegradable polymer B with molecular weight and crystallinity lower than those of the biodegradable polymer A; the reinforced phase and the matrix resin phase are stacked by a guide die; and the stacking percentage of the reinforced phase is 30-90%, and the stacking percentage of the matrix resin phase is 5-60%. The invention also provides a manufacturing method of the self-reinforced bionic material. The invention employs ultrasonic transient heating and interface mechanism with controllable strength to solve a problem for keeping melting fiber morphology when the difference of melting temperature between matrix and the reinforced phase is small; and fiber distribution gradient is constructed to prepare a biodegradable self-reinforced biomimetic material with bamboo imitation structure, high strength and high toughness.

Description

technical field [0001] The invention relates to medical material technology, in particular to a self-reinforced bionic material and a manufacturing method thereof. Background technique [0002] Safe and degradable biomaterials such as polylactic acid and polyglycolic acid have been widely used in medical fields such as human tissue engineering, sutures in the body, and orthopedic materials for surgery. Polylactic acid can be degraded in the body and excreted with metabolites, so that patients can avoid the pain of secondary surgery, and its application in the body has irreplaceable advantages. However, when polylactic acid is used as a substitute for metal materials, it has defects such as low initial mechanical strength and poor toughness. [0003] The use of self-reinforcement technology can effectively improve the strength and toughness of materials, and it is expected to solve the problems of low initial strength and poor toughness of degradable polymer materials in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/30
Inventor 阳范文陈晓明彭晔朱继翔田秀梅
Owner GUANGZHOU MEDICAL UNIV
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