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A kind of preparation device and preparation method of nano-short fiber membrane with porous structure

A technology of porous structure and preparation device, which is applied in the fields of short fiber formation, fiber processing, textile and papermaking, etc., can solve the problems of cumbersome operation, difficult to realize functionalization, unsuitable for mass production, etc., and achieve the effect of simple process and easy operation.

Active Publication Date: 2021-06-25
诸暨明思科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, no matter whether it is to prepare short fibers or porous fibers, the above-mentioned schemes have defects such as cumbersome operation, difficulty in functionalization, and unsuitability for mass production.
If it involves the preparation of short fibers with a porous structure, the process will be more complicated

Method used

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  • A kind of preparation device and preparation method of nano-short fiber membrane with porous structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of porous nano short fiber membrane:

[0038] 1) Configure PEO solution, the solute is PEO, the solvent is alcohol and distilled water (volume ratio 1:1), and the solution concentration is 13%;

[0039] 2) According to figure 1 Assemble the device, the inner diameter of nozzle 4 is 350 μm. The positive electrode of the high-voltage electrostatic generator 8 is electrically connected to the nozzle 4 and the electrode plate 5, and the metal mesh 9 is grounded. The distance between the electrode plate 5 and the metal mesh 9 is 35cm, the angle between the air inlet pipe 2 and the cyclone chamber 1 is 70° in the axial direction (downward is the positive direction), 60° in the radial direction (inward is the positive direction), and 37° in the tangential direction. Two fans 3 are selected to supply air to the swirl chamber 1 to generate swirl in the inner cavity;

[0040] 3) Put the solution into the solution tank 6, set the flow rate of the liquid pum...

Embodiment 2

[0046] A preparation method of porous nano short fiber membrane:

[0047] 1) Configure PEO solution, the solute is PEO, the solvent is alcohol and distilled water (volume ratio 1:1), and the solution concentration is 10%;

[0048] 2) According to figure 1 Assemble the device, the inner diameter of the nozzle 4 is 210 μm. The positive electrode of the high-voltage electrostatic generator 8 is electrically connected to the nozzle 4 and the electrode plate 5, and the metal mesh 9 is grounded. The distance between the electrode plate 5 and the metal mesh 9 is 30cm, the angle between the air inlet pipe 2 and the cyclone chamber 1 is 70° in the axial direction (downward is the positive direction), 60° in the radial direction (inward is the positive direction), and 37° in the tangential direction. Two fans 3 are selected to supply air to the swirl chamber 1 to generate swirl in the inner cavity;

[0049] 3) Put the solution into the solution tank 6, set the flow rate of the liquid...

Embodiment 3

[0055] A preparation method of porous nano short fiber membrane:

[0056] 1) Configure PVDF solution, the solute is PVDF, the solvent is acetone and DMF mixed solvent (volume ratio is 1:1), and the solution concentration is 16%;

[0057] 2) According to figure 1 Assemble the device, the inner diameter of the nozzle 4 is 210 μm. The positive electrode of the high-voltage electrostatic generator 8 is electrically connected to the nozzle 4 and the electrode plate 5, and the metal mesh 9 is grounded. The distance between the electrode plate 5 and the metal mesh 9 is 25cm, the air inlet pipe 2 and the cyclone chamber 1 are 80° axially (downward is positive), radially (inward is positive) 60°, and tangentially 30°. Two fans 3 are selected to supply air to the swirl chamber 1 to generate swirl in the inner cavity;

[0058] 3) Put the solution into the solution tank 6, set the flow rate of the liquid pump 7 to 150 μl / hr, and a stable solution continuously appears at the nozzle 4; ...

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Abstract

The invention discloses a preparation device and a preparation method of a nano-short fiber membrane with a porous structure. Gas cover, air pump; the nozzle is fixed on the electrode plate, and the nozzle is connected with the liquid pump and the solution tank in turn, and the metal mesh is arranged directly below the electrode plate; the positive or negative pole of the high-voltage electrostatic generator is electrically connected to the nozzle and the electrode plate connection, and the metal mesh is grounded; the swirl chamber is set between the nozzle and the metal mesh, and the side wall of the swirl chamber is symmetrically provided with a plurality of air inlet pipes inclined into the swirl chamber; The trachea is connected; a suction hood and an air pump are arranged directly under the metal mesh. The invention utilizes the shearing effect generated by the swirling flow field to break the long fiber jet into short fiber jets, and generate nanofibers with a porous structure and millimeter-level length.

Description

technical field [0001] The invention relates to the field of short fiber membranes, in particular to a preparation device and a preparation method of porous nanometer short fiber membranes. Background technique [0002] Electrospinning technology, also known as electrospinning, is one of the important methods for preparing nanofibers. The principle is: the polymer convex liquid undergoes electro-hydraulic coupling under the action of a high-voltage electrostatic field to form a Taylor cone. When the electric field force is large enough, The droplets will overcome the surface tension and form into jets and spray to the fiber collector, gradually stretched and solidified into ultra-fine fibers under the action of electric field force, charge repulsion force, etc., and finally form long nanofibers on the fiber collector. [0003] Nano-short fibers not only have a large specific surface area, but also exhibit good filtration characteristics, which can effectively filter micro-na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00D01D5/26
CPCD01D5/0061D01D5/0076D01D5/0092D01D5/26
Inventor 应伟军范兴铎李映平
Owner 诸暨明思科技有限公司
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