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Skin-core type poly(lactic acid) (PLA)/poly[(3-hydroxybutyrate)-co-(3-hydroxyvalerate)] (PHBV) composite fiber and preparation method thereof

A composite fiber, sheath-core technology, applied in fiber processing, stretch spinning, filament/thread forming, etc., to achieve the effect of simple and easy-to-operate preparation method, high breaking strength and high output

Active Publication Date: 2020-04-24
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical properties of PLA / PHBV composite fibers are completely determined by PLA, and PHBV does not play a role, that is, the significance of PHBV’s existence is lost. However, it has been proved that fibers with excellent mechanical properties can be produced using PHBV as raw materials.

Method used

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  • Skin-core type poly(lactic acid) (PLA)/poly[(3-hydroxybutyrate)-co-(3-hydroxyvalerate)] (PHBV) composite fiber and preparation method thereof
  • Skin-core type poly(lactic acid) (PLA)/poly[(3-hydroxybutyrate)-co-(3-hydroxyvalerate)] (PHBV) composite fiber and preparation method thereof
  • Skin-core type poly(lactic acid) (PLA)/poly[(3-hydroxybutyrate)-co-(3-hydroxyvalerate)] (PHBV) composite fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) PLA with D-LA content of 10% (viscosity average molecular weight is 2.0×10 5 ) in a vacuum oven at 60 ° C for 36 h for subsequent use, and the HV content is 2.5 mol % of PHBV (viscosity-average molecular weight is 3.9 × 10 5 ) was dried in a vacuum oven at 80° C. for 24 hours for later use, and the moisture content of PLA and PHBV was 200 ppm.

[0041](2) According to the spinning composite ratio of 15:85 (mass ratio), weigh the PLA and PHBV raw materials obtained in step (1) and add them to the corresponding hopper of the composite spinning machine, and melt spinning, cooling by side blowing, and oiling , winding, online stretching, and heat setting to prepare PLA / PHBV composite fibers with sheath-core structure, wherein the melt extrusion temperature of the skin layer in the melt spinning process is 160°C, and the melt extrusion temperature of the core layer is 170°C. The number of holes in the plate is 144 holes; the temperature of the side blowing is 30°C, the ...

Embodiment 2

[0044] (1) D-LA content is 50% PLA (viscosity average molecular weight is 1.5 * 10 5 ) in a vacuum oven at 55 ° C for 48 h for subsequent use, the HV content is 8.0 mol% of PHBV (viscosity average molecular weight is 5.0 × 10 5 ) was dried in a vacuum oven at 80°C for 24 hours for later use; the moisture content of PLA and PHBV was 150ppm;

[0045] (2) According to the spinning composite ratio of 10:90 (mass ratio), weigh the PLA and PHBV raw materials obtained in step (1) and add them to the corresponding hopper of the composite spinning machine, and melt spinning, cooling by side blowing, and oiling , winding, online stretching, and heat setting to prepare PLA / PHBV composite fibers with a sheath-core structure. In the melt spinning process, the melt extrusion temperature of the skin layer is 160°C, and the melt extrusion temperature of the core layer is 175°C. Spinning The number of holes in the plate is 70 holes; the temperature of the side blowing is 20°C, the relative hu...

Embodiment 3

[0048] (1) PLA with D-LA content of 12% (viscosity average molecular weight is 2.0×10 5 ) in a vacuum oven at 60 ° C for 36 h for subsequent use, and the HV content is 2.5 mol % of PHBV (viscosity-average molecular weight is 3.9 × 10 5 ) was dried in a vacuum oven at 80°C for 24 hours for later use, and the moisture content of PLA and PHBV was 100ppm;

[0049] (2) Weigh the PLA and PHBV raw materials obtained in step (1) according to the spinning composite ratio of 20:80 (mass ratio), and add them to the corresponding hopper of the composite spinning machine, and melt spinning, cooling by side blowing, and oiling , winding, online stretching, and heat setting to prepare PLA / PHBV composite fibers with sheath-core structure, wherein the melt extrusion temperature of the skin layer in the melt spinning process is 170°C, and the melt extrusion temperature of the core layer is 170°C. The number of holes in the plate is 24 holes; the temperature of the side blowing is 35°C, the rel...

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Abstract

The invention discloses a skin-core type poly(lactic acid) (PLA) / poly[(3-hydroxybutyrate)-co-(3-hydroxyvalerate)] (PHBV) composite fiber and a preparation method thereof, and belongs to the field of high polymer materials. The preparation method of the skin-core type PLA / PHBV composite fiber specifically includes the steps: 1, respectively drying the raw material PLA in a skin layer and a raw material PHBV in a core layer, wherein moisture content of the PLA and the PHBV is not more than 200 ppm; and 2, weighing the raw materials PLA and PHBV obtained in the step 1 according to a composite spinning ratio to perform compositely spinning, melting spinning, cross air blowing, applying oil, winding, online stretching, and thermoforming to obtain the skin-core type PLA / PHBV composite fiber, wherein the number of holes in a spinning plate used during a spinning process is 24-144. The material prepared according to the method is high in breaking strength, and can be applied to the fields of medical materials, agricultural textile, disposable goods and package materials.

Description

technical field [0001] The invention relates to a skin-core PLA / PHBV composite fiber and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is a kind of biological material produced by using starch as raw material and using fermentation engineering technology. It is a kind of biological polyester, which is produced by bacteria , can be digested by bacteria, can be completely decomposed into carbon dioxide, water and biomass under soil or composting conditions, degradable, and will not pollute the environment. But it also has some inherent performance defects. One of the defects is that it is difficult to spin and it is difficult to use industrially. [0003] Currently, Hufenus et al. [Hufenus, R.; Reifler, F.A.; Maniura-Weber, K.; Spierings, A.; Zinn, M. Biodegradable Bicomponent Fibers from Renewable Sources: Melt-Spinning of Poly(lactic acid) and Poly [(3-hydroxybuty...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/34D01D5/12D01D10/02D01F8/14
CPCD01D5/12D01D5/34D01D10/02D01F8/14
Inventor 刘庆生邓炳耀
Owner JIANGNAN UNIV
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