Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of tear-resistant polylactic acid fiber

A polylactic acid fiber, tear-resistant technology, applied in the direction of fiber chemical characteristics, cellulose/protein conjugated rayon, rayon manufacturing, etc., can solve the problems of lack of flexibility and elasticity, low tear strength, application limitations, etc. , to achieve the effect of good compatibility, high tear resistance and excellent mechanical properties

Inactive Publication Date: 2018-02-23
ANHUI YAYUAN PRINTING & DYEING CO LTD
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the lack of long chain branches in the molecular chain of polylactic acid, it has the disadvantages of poor toughness, lack of flexibility and elasticity, and low tear strength, so its application is limited.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method of tear-resistant polylactic acid fiber, comprising the steps of: mixing 90g polylactic acid and 60g chitosan, adding 180g concentration of 65wt% ethanol solution and continuing to stir for 20min, filtering, vacuum drying for 20h, vacuum degree is 10Pa, The drying temperature is 80°C; add 10g of pretreated adhesive fiber, 4g of expanded graphite, 0.4g of silane coupling agent, and 4g of cocamidopropyl betaine, mix evenly, and spin to obtain tear-resistant polylactic acid fibers.

[0018] The pretreated adhesive fiber is prepared by the following process: Stir 10g adhesive fiber, 4g hydrogen peroxide, and 60g water for 80min at a stirring temperature of 70°C, adjust the pH value of the system to 6-6.5, add 4g disproportionated rosin, 2g polyhydroxyalkane The acid ester was stirred for 4 hours, 150 g of 4 wt % glutaraldehyde solution was added and stirred for 10 minutes, filtered, washed and dried to obtain pretreated adhesive fibers.

Embodiment 2

[0020] A preparation method of tear-resistant polylactic acid fiber, comprising the steps of: mixing 100g polylactic acid and 40g chitosan, adding 240g concentration of 55wt% ethanol solution and continuing to stir for 40min, filtering, vacuum drying for 15h, the vacuum degree is 20Pa, The drying temperature is 70°C; 20g of pretreated adhesive fiber, 2g of expanded graphite, 0.8g of silane coupling agent, and 2g of cocamidopropyl betaine are added, mixed evenly, and spun to obtain tear-resistant polylactic acid fiber.

[0021] The pretreated adhesive fiber is prepared by the following process: Stir 20g adhesive fiber, 2g hydrogen peroxide, and 80g water for 40min at a stirring temperature of 90°C, adjust the pH value of the system to 6-6.5, add 2g disproportionated rosin, 4g polyhydroxyalkane The acid ester was stirred for 2 hours, 230 g of 2 wt % glutaraldehyde solution was added and stirred for 20 minutes, filtered, washed and dried to obtain pretreated adhesive fibers.

Embodiment 3

[0023] A preparation method of tear-resistant polylactic acid fiber, comprising the steps of: mixing 92g polylactic acid and 55g chitosan, adding 200g concentration of 62wt% ethanol solution and continuing to stir for 25min, filtering, vacuum drying for 18h, and a vacuum degree of 12Pa, The drying temperature is 77°C; add 12g of pretreated adhesive fiber, 3.5g of expanded graphite, 0.5g of silane coupling agent, and 3.5g of cocamidopropyl betaine, mix evenly, and spin to obtain tear-resistant polylactic acid fibers.

[0024] The pretreated adhesive fiber was prepared by the following process: 12g adhesive fiber, 3.5g hydrogen peroxide, and 65g water were stirred for 70min at a stirring temperature of 75°C, the pH value of the system was adjusted to 6-6.5, and 3.5g disproportionated rosin, 2.5g The polyhydroxyalkanoate was stirred for 3.5 hours, 170 g of 3 wt % glutaraldehyde solution was added and stirred for 12 minutes, filtered, washed and dried to obtain pretreated adhesive ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of tear-resistant polylactic acid fiber, comprising the steps of mixing polylactic acid and chitosan, adding ethanol solution, continuing to stir, filtering, drying in vacuum, adding pretreated viscose, expanded graphite, silane coupling agent and cocamidopropyl betaine, mixing well, and performing spinning to obtain the wear-resistant polylactic acid fiber. The pretreated viscose is prepared by: stirring viscose, hydrogen peroxide and water, adjusting system pH to 6-6.5, adding disproportionated rosin and a polyhydroxyalkanoate, continuing to stir,adding glutaraldehyde solution, stirring, filtering, washing, and drying to obtain the pretreated viscose. With transparency and softness of polylactic acid retained, the tear-resistant polylactic acid fiber prepared herein has excellent impact resistance, toughness and other mechanical properties and has high tensile strength and good biodegradability; after being discarded in nature or buried in soil, the tear-resistant polylactic acid fiber may decompose slowly and has little bad influence on the environment.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a preparation method of tear-resistant polylactic acid fibers. Background technique [0002] Polylactic acid is a very important biodegradable material. It is a new type of biodegradable polymer material chemically synthesized from lactic acid extracted from agricultural corn. It is non-toxic, non-irritating, and has good biocompatibility. It has the characteristics of high strength, biodegradability and absorption, and is widely used in fabric fibers. [0003] However, due to the lack of long-chain branches in the polylactic acid molecular chain, it has the disadvantages of poor toughness, lack of flexibility and elasticity, and low tear strength, so its application is limited. Contents of the invention [0004] Based on the technical problems existing in the background technology, the present invention proposes a method for preparing tear-resistant polylactic acid fibers. W...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D01F8/14D01F8/18D01F8/02D01F1/10
CPCD01F1/10D01F8/02D01F8/14D01F8/18
Inventor 潘学东
Owner ANHUI YAYUAN PRINTING & DYEING CO LTD