Polyhydroxyalkanoates fiber and preparation method thereof

A technology of polyhydroxyalkanoate and hydroxybutyric acid, which is applied in the field of degradable fiber and its preparation, and can solve the problem of low strength

Inactive Publication Date: 2009-09-23
TIANJIN GREENBIO MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Polylactic acid PLA (Polylactic acid) and poly (ε-caprolactone) PCL fiber

Method used

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  • Polyhydroxyalkanoates fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 2.5g of P(3HB-4HB)(4HB 10%) polymer (Tianjin Guoyun Biotechnology Co., Ltd.) with a weight average molecular weight Mw=300,000, put it into the melt extruder, and heat it to 170°C to the maximum Load extruded circular spline. After the sample is slowly cooled at room temperature, it is dried to remove water, and then cold stretched at a speed of 40mm / min to obtain oriented P(3HB-4HB) fibers with different stretching ratios. After standing at room temperature for a period of time, the strength test is performed . P(3HB-4HB) fibers with diameters ranging from 400μm to 800μm and strengths ranging from 200MPa to 300MPa were obtained.

Embodiment 2

[0038]Weigh 3.5g of P(3HB-4HB) (4HB is 10%) polymer (Tianjin Guoyun Biotechnology Co., Ltd.) with a weight average molecular weight Mw=300,000, put it into the melt extruder, and heat it to 160°C. Extrude round splines with maximum load. The extruded spline is pre-stretched and put into ice water for quenching treatment to obtain amorphous fiber. After the amorphous fiber is kept in ice water for isothermal crystallization for 24 hours, it is dried to remove water, and then cold-stretched at a speed of 40mm / min to obtain a 6-fold stretched oriented P(3HB-4HB) fiber. After leaving it at room temperature for a period of time, Conduct a strength test. A P(3HB-4HB) fiber with a diameter of 200 μm, a strength of 302 MPa, and an elongation of 117% was obtained.

Embodiment 3

[0040] The implementation method is the same as that in Example 2. The obtained 6-fold stretched oriented P(3HB-4HB) fiber was annealed at 76°C for 60 minutes under a stress of 100MPa, and then placed at room temperature for a period of time, and then tested for strength. . A P(3HB-4HB) fiber with a diameter of 150 μm, a strength of 559 MPa, and an elongation of 58% was obtained.

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Abstract

The invention relates to a fiber and a preparation method thereof, in particular to a degradable fiber and a preparation method thereof. The fiber contains polyhydroxyalkanoates, and the preparation method thereof comprises the steps of melting and extruding a base material, obtaining a sample band, cold-stretching or pre-stretching the sample band, quenching, performing isothermal crystallization and the like. The fiber disclosed by the invention has the advantages of good biocompatibility, biodegradability, high strength and/or good toughness.

Description

Technical field [0001] The present invention relates to a fiber and a preparation method thereof, more specifically, the present invention relates to a degradable fiber and a preparation method thereof. Background technique [0002] Fiber is a widely used form of polymer materials, including nylon fibers, natural fibers, acetate fibers and other synthetic fibers. Although these fibers have one or other advantages, their degradation behavior is too slow. [0003] Aliphatic polyester is the most important biodegradable and biocompatible material. It is widely used in agriculture, coatings, medicine (controlled release of drugs, medical implant materials, sutures, etc.), adhesives and packaging industries. . The most representative aliphatic polyesters are polyhydroxyalkanoate, polylactic acid and poly(ε-caprolactone). [0004] Microbial polyhydroxyalkanoates (hereinafter referred to as PHA) is a biopolymer material that has developed rapidly in the past two decades. It is the intra...

Claims

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Application Information

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IPC IPC(8): D01F6/62D01F6/84D01F8/14D01F6/92D02J1/22
Inventor 许开天陈国强吕渭川陈贤裕潘觉宇陈智飞朱文甫
Owner TIANJIN GREENBIO MATERIAL CO LTD
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