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Polylactic acid fiber spinning process

A technology of polylactic acid fiber and spinning process, which is applied in the field of spinning process, can solve the problems of high brittleness of polylactic acid, restricting the breadth and depth of polylactic acid, and high glass transition temperature, so as to reduce residual stress and improve elongation at break , The effect of increasing the thermal degradation temperature

Inactive Publication Date: 2020-04-03
无锡御束生物材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing polylactic acid preparation process, the prepared polylactic acid has the advantage of high modulus, but due to its high glass transition temperature, it brings the disadvantage of high brittleness of polylactic acid, which seriously restricts the breadth and application of polylactic acid. depth, so existing processes must be improved

Method used

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  • Polylactic acid fiber spinning process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A polylactic acid fiber spinning process, the process may further comprise the steps:

[0032] Step 1: adding polylactic acid to a mixed solvent, stirring and dissolving at room temperature, then adding tannic acid, stirring at room temperature for 5-7 hours, standing for 0.5 hours to remove foam, and obtaining a pretreatment solution;

[0033] Wherein, the mixed solvent is obtained by mixing dichloromethane and N,N-dimethylformamide according to a volume ratio of 7:3;

[0034] The solid-to-liquid ratio of polylactic acid to the mixed solvent is 1:10, and the mass of tannic acid is 40% of the mass of polylactic acid.

[0035] Step 2, adding a plasticizer to the pretreatment solution first, then adding an initiator, stirring and dissolving to obtain a spinning solution;

[0036] Wherein, the addition of plasticizer is 10% of polylactic acid quality; 0.5% of;

[0037] Step 3, spinning the spinning solution using an electrospinning device to obtain polylactic acid fiber...

Embodiment 2

[0045] A polylactic acid fiber spinning process, the process may further comprise the steps:

[0046]Step 1, adding polylactic acid to the mixed solvent, stirring and dissolving at room temperature, then adding tannic acid, stirring at room temperature for 6 hours, standing for 0.5 hours to remove foam, and obtaining a pretreatment solution;

[0047] Wherein, the mixed solvent is obtained by uniformly mixing dichloromethane and N,N-dimethylformamide according to a volume ratio of 7:3;

[0048] The solid-to-liquid ratio of polylactic acid to the mixed solvent is 1:10, and the mass of tannic acid is 40% of the mass of polylactic acid.

[0049] Step 2, adding a plasticizer to the pretreatment solution first, then adding an initiator, stirring and dissolving to obtain a spinning solution;

[0050] Wherein, the addition of plasticizer is 15% of polylactic acid quality; 1%;

[0051] Step 3, spinning the spinning solution using an electrospinning device to obtain polylactic acid f...

Embodiment 3

[0059] A polylactic acid fiber spinning process, the process may further comprise the steps:

[0060] Step 1, adding polylactic acid to the mixed solvent, stirring and dissolving at room temperature, then adding tannic acid, stirring at room temperature for 7 hours, standing for 0.5 hours to remove foam, and obtaining a pretreatment solution;

[0061] Wherein, the mixed solvent is obtained by uniformly mixing dichloromethane and N,N-dimethylformamide according to a volume ratio of 7:3;

[0062] The solid-to-liquid ratio of polylactic acid to the mixed solvent is 1:10, and the mass of tannic acid is 40% of the mass of polylactic acid.

[0063] Step 2, adding a plasticizer to the pretreatment solution first, then adding an initiator, stirring and dissolving to obtain a spinning solution;

[0064] Wherein, the add-on of plasticizer is 20% of the quality of polylactic acid; 2% of

[0065] Step 3, spinning the spinning solution using an electrospinning device to obtain polylacti...

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Abstract

The invention relates to the field of spinning process, and specifically relates to a polylactic acid fiber spinning process. The polylactic acid fiber spinning process is characterized by comprisingthe following steps of step 1, adding polylactic acid to a mixed solvent, stirring and dissolving at room temperature, then adding tannic acid to obtain a pretreatment solution; step 2, firstly addinga plasticizer to the pretreatment solution, and then adding an initiator to obtain a spinning solution; and step 3, spinning the spinning solution using an electrostatic spinning device to obtain a polylactic acid fiber. The polylactic acid fiber spinning process provided by the invention solves the disadvantages of high polylactic acid brittleness due to high glass transition temperature of theprepared polylactic acid in the existing polylactic acid preparation process. By designing the polylactic acid fiber spinning process, the obtained polylactic acid fiber has the advantages of high temperature resistance and strong toughness.

Description

technical field [0001] The invention relates to the field of spinning technology, in particular to a polylactic acid fiber spinning technology. Background technique [0002] Polylactic acid is condensed from lactic acid, which is an environmentally friendly biodegradable material. Under composting conditions, polylactic acid can be completely biodegraded into carbon dioxide and water, and finally absorbed by biomass for photosynthesis to produce starch. Polylactic acid has good gloss, transparency and tensile strength, so it is widely used in human life, and has good performance in drug sustained-release materials, surgical sutures, packaging materials and woven fabrics. [0003] For semi-crystalline polylactic acid, its crystallinity, crystal size and crystal morphology cause differences in the macroscopic properties of the polymer (such as tensile properties, impact strength, cracking properties, transparency, etc.). In the existing polylactic acid preparation process, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10
CPCD01F1/10D01F1/103D01F6/92
Inventor 王辉王庆
Owner 无锡御束生物材料科技有限公司
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