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Preparation method of nanofiber

A nanofiber and spinning solution technology, applied in the field of nanofiber, can solve the problems of low stretching rate, high frictional resistance, low yield, etc., and achieve the effect of uniform fiber diameter, meeting application requirements, and better fiber shape

Inactive Publication Date: 2018-11-06
ZETTA NANO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large frictional resistance of the liquid coagulation bath, the drawing rate is relatively low, the drawing ratio is also small, and the yield is low, the diameter of the fiber obtained by air-jet spinning often cannot meet the demand

Method used

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  • Preparation method of nanofiber

Examples

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Effect test

Embodiment 1

[0020] A kind of preparation method of polyvinyl alcohol nanofiber adopts such as figure 1 The device is used for spinning, and the specific process steps are as follows:

[0021] (1) Dissolve polyvinyl alcohol into water, and obtain spinning solution through mixing, filtering and defoaming;

[0022] (2) Use a syringe pump to feed the spinning solution obtained in step (1) into the spinning box through a metering pump at a rate of 9mL / h. When the spinning solution is extruded from the spinneret, a fine stream is formed. Compressed gas is introduced into the spinning box, the pressure of the compressed gas is 0.08MPa, and the resulting fine spinneret enters the spinning box, and the fine spinneret passes through an air section, and then enters the solidification at the bottom of the spinning box. coagulation and molding in the bath, and the formed nanofibers are exported and collected through the fiber steering guide roller and the finished product guide roller in the fiber co...

Embodiment 2

[0036] A kind of preparation method of terephthalamide nanofiber adopts such as figure 1 The device is used for spinning, and the specific process steps are as follows:

[0037] (1) Dissolving terephthalamide into tetrahydrofuran, and mixing, filtering, and defoaming to obtain spinning solution;

[0038] (2) Use a syringe pump to feed the spinning solution obtained in step (1) into the spinning box through a metering pump at a speed of 12mL / h. When the spinning solution is extruded from the spinneret, a fine stream is formed. Compressed gas is introduced into the spinning box, the pressure of the compressed gas is 0.08MPa, and the resulting fine spinneret enters the spinning box, and the fine spinneret passes through an air section, and then enters the solidification at the bottom of the spinning box. coagulation and molding in the bath, and the formed nanofibers are exported and collected through the fiber steering guide roller and the finished product guide roller in the fi...

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Abstract

The invention provides a preparation method of a nanofiber. A molding technology of combining air section with coagulating bath treatment is adopted by fiber forming polymers which are nonvolatile inair or are in a heat labile solvent, wherein firstly, it is ensured that a fiber has a certain drafting in a 1-5 centimeters of the air section, then the full removal of the solvent and entire moldingof the fiber are ensured in coagulating bath, the fiber obtained by adopting a jet spinning method has a better shape and appearance, and compared with the fiber diameter of the fiber in the prior art, that of the fiber obtained by adopting the jet spinning method is smaller and more evenly distributed, so that the application requirements can be better satisfied.

Description

technical field [0001] The invention belongs to the field of nanofibers, in particular to a method for preparing nanofibers. Background technique [0002] Jet spinning technology is a new nanofiber preparation technology that can obtain spun fibers with smaller diameters. The polymer solution is used as the object, and the high-speed airflow is used as the driving force. Under the action of airflow, a polymer jet is formed, and the jet is further drawn and thinned in the receiving device. Jet spinning has higher spinning efficiency than electrospinning, and due to the driving effect of high-speed airflow, the resulting fiber diameter is finer. It is a spinning fiber technology with great industrial prospects. [0003] The process of forming fibers by polymer jet in the prior art relies on the volatilization of solvent and the drafting of spun fibers in the air state. For fiber-forming polymers in non-volatile or thermally unstable solvents in the air, they usually need to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/06D01D5/04D01F6/14D01F6/60
CPCD01D5/04D01D5/06D01F6/14D01F6/60
Inventor 兰清泉何旺超
Owner ZETTA NANO TECH CO LTD
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