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Electrospinning device for preparing short fiber felt and preparation method thereof

A short fiber and electrospinning technology, which is applied in fiber processing, textiles, papermaking, non-woven fabrics, etc., can solve the problems of cumbersome preparation steps, unsuitable for mass production, and restrictions on the application of nano-short fibers, and achieve the effect of simplifying the preparation steps

Inactive Publication Date: 2018-12-18
JIYANG COLLEGE OF ZHEJIANG A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the preparation steps of the existing technology are cumbersome, and it is impossible to directly prepare nano-short fiber mats, which is not suitable for mass production and also restricts the application of nano-short fibers

Method used

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  • Electrospinning device for preparing short fiber felt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this embodiment, the air inlet pipe 4 and the swirl chamber 5 have an axial angle of 45° (upward is positive), a tangential angle of 30°, and a radial angle of 30° (inward is positive); the solution used is PEO solution, and the solute It is PEO, the solvent is alcohol and distilled water, the volume ratio is 1:1, the solution concentration is 16%; the inner diameter of the nozzle 12 is 210 μm.

[0039] Based on above-mentioned device, embodiment 1 is as follows about the preparation method of nano-short fiber mat:

[0040] 1) Put the PEO solution into the liquid storage tank 1, set the flow rate of the droplet generator 2 to 700 μl / hr, and the frequency of the droplet 11 to be 3 Hz.

[0041] 2) Turn on the two fans 3 and set the flow rate of the pumped gas to 3.6m / s to generate a swirl in the swirl chamber 5, at which time the swirl chamber 5 produces a large number of fragmented droplets 10.

[0042] 3) Turn on the high-voltage electrostatic generator 8, set the v...

Embodiment 2

[0045] In this embodiment, the air inlet pipe 4 and the swirl chamber 5 form an axial angle of 45° (upward is positive), a tangential angle of 45°, and a radial angle of 50° (inward is positive); the solution used is PVDF solution, and the solute It is PVDF, the solvent is acetone and DMF, the volume ratio is 1:1, the solution concentration is 15%; the inner diameter of the nozzle 12 is 210 μm.

[0046] Based on above-mentioned device, embodiment 2 is as follows about the preparation method of nano-short fiber:

[0047] 1) Put the PVDF solution into the liquid storage tank 1, set the flow rate of the droplet generator 2 to 500 μl / hr, and the frequency of the droplet 11 to be 3 Hz.

[0048] 2) Turn on the two fans 3 and set the flow rate of the pumped gas to 2.7m / s to generate a swirl in the swirl chamber 5, at which time the swirl chamber 5 produces a large number of fragmented droplets 10.

[0049] 3) Turn on the high-voltage electrostatic generator 8, set the voltage output v...

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Abstract

The invention discloses an electrospinning device for preparing a short fiber felt and a preparation method thereof. The device comprises a swirl chamber, a fixing seat, a nozzle, a droplet generator,a liquid storage tank, an air inlet tube, fans, a fiber depositor, a metal conductive ring and a high-voltage electrostatic generator; the bottom of the swirl chamber is provided with the fixing seat, and the nozzle is formed in the fixing seat; the nozzle is sequentially communicated with the droplet generator and the liquid storage tank outside the swirling chamber; the side wall of the swirl chamber is symmetrically provided with a plurality of inlet pipes obliquely communicated with the swirl chamber; each fan is in communication with the corresponding inlet pipe, and gas enters the swirlchamber under fan agitation and forms a swirling flow; the upper port of the swirl chamber is provided with the metal conductive ring of a ring structure; the metal conductive ring is electrically connected to the high-voltage electrostatic generator; the fiber depositor is disposed directly above the swirl chamber, and the fiber depositor is grounded. The device utilizes a flow field to generatea large number of fine droplets, ejects a plurality of short fiber jets, and can directly prepare the short fiber felt with a single fiber length of micron grade and a fiber diameter of nanometer grade.

Description

technical field [0001] The invention relates to the technical field of short fiber preparation, in particular to an electrospinning device for preparing a short fiber mat and a preparation method thereof. Background technique [0002] Electrospinning is one of the common methods for preparing nanofibers, referred to as electrospinning. The solution droplet or solution tip is subjected to high-voltage electrostatic action to generate electro-hydraulic coupling and deform into a Taylor cone. When the electric field force is large enough, the charged jet flows from the Taylor cone. The tips are sprayed toward the substrate, and are gradually stretched and solidified during the flight, and finally deposited on the substrate to form nanofibers. The nanofibers obtained by this method are generally long fibers, that is, the length of a single fiber is greater than the micron level. [0003] The fiber mat with a single fiber length of micron level and fiber diameter of nanometer le...

Claims

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Application Information

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IPC IPC(8): D01D5/00D04H1/728
CPCD01D5/0061D04H1/728
Inventor 范兴铎应伟军李映平
Owner JIYANG COLLEGE OF ZHEJIANG A & F UNIV
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