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Preparation method and device for electrospinning nanofiber yarn

A nanofiber and preparation device technology, which is applied in fiber processing, textiles, papermaking, yarn, etc., can solve the problems of limited application range and small output, and achieve the effect of convenient operation and simple preparation

Inactive Publication Date: 2011-12-14
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this method, organic or inorganic nanomaterials, nanoporous materials, nanoparticles, nanowires and even nanotubes can be synthesized, but the yield is small
The interfacial polymerization method is a method of polymerization reaction at the interface between the organic phase and the aqueous phase. The synthesis and purification process of this method are relatively simple, but it is only suitable for the reaction of some amphiphilic substances, and the application range has certain limitations.

Method used

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  • Preparation method and device for electrospinning nanofiber yarn
  • Preparation method and device for electrospinning nanofiber yarn
  • Preparation method and device for electrospinning nanofiber yarn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The electrospinning parameters were set as follows:

[0037] (1) The electrospinning solution is a polyacrylonitrile solution, and the mass fraction of the solution is 12%;

[0038] (2) The spinning distance from the spinneret to the receiving device is 3cm;

[0039] (3) The spinning voltage is 12kV;

[0040] (4) The flow rate of electrospinning solution is 0.005ml / min;

[0041] (5) The mass content of lithium chloride is 0.6%;

[0042] (6) The pumping rate of the vacuum pump is 360L / min;

[0043] The various stages of nanofiber forming yarn such as Figure 4 shown. Among them, b, c, and d are the photos taken by the stereo microscope respectively, and the magnification is 300 times.

[0044] In the process of obtaining the nanofiber yarn by using the device, the morphology of the fiber is divided into three stages, which are the fiber orientation arrangement, the transition zone in the middle, and the nanofiber yarn at the rear end.

[0045] The morphology of nano...

Embodiment 2

[0047] The electrospinning parameters were set as follows:

[0048] (1) The flow rate of electrospinning solution is 0.0075ml / min;

[0049] Other electrospinning parameters are the same as above.

[0050] The obtained nanofiber yarn Figure 4 , the fiber shape in the yarn is as Figure 6 shown. There are still fiber entanglements in the yarn, but the number of entangled fibers is reduced, and the straightness of the fiber alignment along the yarn axis is improved.

Embodiment 3

[0052] The electrospinning parameters were set as follows:

[0053] (1) The flow rate of electrospinning solution is 0.01ml / min;

[0054] Other electrospinning parameters are the same as above.

[0055] The obtained nanofiber yarn Figure 4 , the fiber shape in the yarn is as Figure 7 shown. The flow rate of the solution in the spinneret increases, the fibers are crowded and bent, and the straightness of the fibers along the yarn axis is weakened.

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Abstract

The invention discloses a preparation method and device for electrostatic spinning nanofiber yarn. It includes a spinneret, a high-voltage generator and a receiving device; the receiving device is a funnel-type receiving device, which is formed by connecting a conical shrinking tube and a cylindrical tube, and the large end of the conical shrinking tube is facing the electrospinning solution The spinneret has an opening at the bottom of the cylindrical tube, and the opening is connected to a vacuum pump, forming an airflow moving from the funnel inlet to the opening of the cylindrical tube in the funnel-type receiving device. In the present invention, electrolyte is added to the high polymer solution used in electrospinning to increase the aggregation effect of fibers; at the same time, a funnel-shaped pipe is used as a receiving device for electrospinning nanofibers, and the cylindrical pipe at the back end of the funnel is tangentially vacuumed to form A certain airflow field gathers the fibers to form a yarn composed of nanofibers. The device of the invention is simple to prepare and convenient to operate, and the prepared nanofiber yarn can be used in fields such as electronics and bioengineering.

Description

technical field [0001] The present invention relates to a method and device for preparing yarn, more specifically, relates to a method and device for preparing electrospun nanofiber yarn. Background technique [0002] In recent years, due to the rapid increase in nanotechnology and nanomaterials research, many methods for preparing nanofibers have been developed, such as template polymerization, self-assembly, interfacial polymerization, solid-phase mechanochemical synthesis, and electrospinning. The template polymerization method uses the nanoporous membrane as a template to prepare nanofibers or nanohollow fibers. This method can be applied to different raw materials, such as metals, conductive polymers, carbon nanotubes and semiconductors, but cannot produce continuous long nanofibers. The self-assembly method is mainly a method of obtaining various superstructures through self-assembly of low-carbon nanomaterials. Organic or inorganic nanomaterials, nanoporous material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02G3/00D01D5/00
Inventor 李妮熊杰薛花
Owner ZHEJIANG SCI-TECH UNIV
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