Device for preparing distorted-structure polymer micron/nano composite fiber and method thereof

A nanocomposite fiber and twisted structure technology, applied in the field of material science and engineering, can solve the problems of unfavorable large-scale production, chemical agent pollution, high cost, etc., and achieve the effect of simple method, low cost and improved production efficiency

Inactive Publication Date: 2009-09-09
BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires two-step treatment and requires additional processing equipment, which is costly and time-consuming, and additional pollution from chemicals
Such methods are also not conducive to large-scale production

Method used

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  • Device for preparing distorted-structure polymer micron/nano composite fiber and method thereof
  • Device for preparing distorted-structure polymer micron/nano composite fiber and method thereof
  • Device for preparing distorted-structure polymer micron/nano composite fiber and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1 The device for preparing twisted fiber of single spinneret group

[0041] The schematic diagram of the device for preparing twisted nanofibers with a single spinneret group is shown in figure 1. The device has a spinneret group, including two spinnerets, that is, the first spinneret 1 and the second spinneret 2 . The spinneret is made of metal conductive material, one end of the metal wire is connected to the power supply, and the other end is respectively connected to the spinneret 1 and the spinneret 2 to provide the voltage required for electrospinning. Spinneret 1 is supplied with high-shrinkage polymer solution through liquid supply device, and spinneret 2 is supplied with low-shrinkage polymer solution. The voltage connected to the spinneret 1 is a positive voltage with a voltage range of 15-22KV, and the voltage connected to the spinneret 2 is a negative voltage with a voltage range of -3--8KV. d1 is the horizontal distance between the spinneret 1...

Embodiment 2

[0042] Example 2 The device for preparing twisted fibers by using multi-spinneret groups

[0043] The device for preparing twisted nanofibers of the present invention can also have multiple spinneret groups, and the positional relationship of the two spinnerets in each spinneret group is as described in Example 1. Each spinneret group is arranged in parallel, their first spinnerets 1, 1', 1"... are connected to the same electrode voltage, and the second spinnerets 2, 2', 2"... are connected to the first nozzle Electrode voltage opposite to wire head. Polymer solutions with different shrinkage ratios are added to the first spinneret and the second spinneret of each spinneret group, and the polymer solutions between the spinneret groups can be the same or different, thereby producing two sets of Twisted composite fibers of one or more components. This device greatly improves production efficiency and is suitable for large-scale production of twisted fibers of composite materia...

Embodiment 3

[0044] Example 3 Preparation of highly shrinkable polyethylene terephthalate / polytrimethylene terephthalate (HSPET / PTT) twisted fibers

[0045] Such as figure 1 The setup for making twisted composite fibers is shown. The positional relationship between the two spinnerets and the receiving device is: d1=5cm, d2=14cm, h=6cm, θ=90°.

[0046] 1) HSPET and PTT were dissolved in trifluoroacetic acid (TFA) and dichloromethane in a mixed solvent with a volume ratio of 3:2, the concentration range was 9% to 14% (mass percentage), and after stirring with a magnetic stirrer for 6 hours Start spinning. Add HSPET into spinneret 1 and PTT into spinneret 2.

[0047] 2) Provide +22KV voltage to spinneret 1.

[0048] 3) After the HSPET fiber is ejected stably, when the negative pressure is gradually provided to the spinneret 2 to -6KV, the two polymer solutions of HSPET and PTT can be stably compounded and move towards the receiving plate 3 together.

[0049] 4) The polymer solution forms...

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Abstract

The invention discloses a device for preparing distorted-structure polymer micron / nano composite fiber and a method thereof. The device provided by the invention consists of at least a spinneret set and a receiving device. Two spinnerets in the spinneret group are respectively imposed with positive and negative voltage of different magnitudes and added with components of different shrinkage rates; after being ejected out under the effect of positive and negative voltage and agglutinated, the two components continue to extend under the effect of electric field, then form the composite fiber with the solvent volatilization and finally are received by the receiving device. The composite fiber on the receiving device shrinks due to the resilience caused by charge transfer and then forms distorted fiber due to different shrinkage rates of the two components. According to differences of component properties, voltage and relative positions of the two spinnerets of the receiving device, distorted fibers with different morphologies can be prepared. The invention solves the control problem of the distorted structure and is applicable to large-scale production with simple method and low cost.

Description

technical field [0001] The invention relates to equipment and a preparation process for preparing self-twisting polymer micron or nanometer composite fibers, belonging to the field of material science and engineering. Background technique [0002] Electro spinning (Electro spinning) is a technology that uses the electrostatic force to prepare continuous nanofibers, that is, DC high voltage is applied between the polymer solution (or melt) and the fiber collection device, and the polymer solution is sprayed at high speed under the action of electrostatic force. form continuous nanofibers. Electrospinning is the only way to prepare continuous polymer nanofibers, and the diameters of the prepared fibers are generally tens to hundreds of nanometers. In 1934, American engineer A.Formals realized the electrospinning of cellulose (CA) solution under the action of electrostatic force; then, from 1950 to 1980, people conducted research one after another; after the 1980s, especially ...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01F8/08D01F8/14
Inventor 李从举张斌斐
Owner BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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