Electrostatic spinning device for preparing nanofibers

A technology of electrospinning and nanofibers, which is applied in fiber processing, textiles and papermaking, filament/thread forming, etc., can solve the problems of commercial production difficulties, insufficient technology, complex equipment, etc., and achieves easy industrialization and implementation The effect of low cost and simple method

Active Publication Date: 2014-01-01
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods still have defects such as complex equipment, high cost, imperfect technology, and difficulties in commercial production.

Method used

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  • Electrostatic spinning device for preparing nanofibers
  • Electrostatic spinning device for preparing nanofibers
  • Electrostatic spinning device for preparing nanofibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Design an electrostatic spinning device to improve the efficiency of nanofiber preparation, including a liquid jet 1, a high-voltage electrostatic generator 2, a needle electrode 3, a plate electrode 4, a receiving curtain 5, a liquid storage tank 6, a spinning tank 7, and a sending Liquid pump 8, suction pump 9, curtain delivery roller 10, roller shutter roller 11, duct 12, drain hole 13, motor 14, pressure nozzle 15, fixing screw 16, bellflower-like liquid film 17, jet 18, spray tube 1′, such as figure 1 Shown. Among them, the height of the nozzle 1'in the nozzle 1 is 50mm and the diameter is 20mm, the height of the nozzle 15 in the nozzle 1 is 8mm, the diameter is 30mm, and the inclination angle of the nozzle 15 is 80°, such as figure 2 , 3 , 6; the spinning pool 7 is circular, with a diameter of 200mm and a height of 80mm, made of glass, such as Figure 4 As shown; needle electrode 3 length is 10mm, diameter is 0.5mm, solid structure; plate electrode 4 length and wid...

Embodiment 2

[0030] This embodiment uses basically the same device and process as in embodiment 1, such as figure 1 Shown. The changes are: the height of the sprayer 1 is 40mm, the diameter is 22mm, the height of the pressure nozzle 15 of the sprayer 1 is 6mm, the diameter is 36mm, and the inclination angle of the pressure nozzle 15 is 60°, such as figure 2 , 3 , 7; the spinning pool 7 is square, the length and width are both 60mm, and the height is 65mm, made of organic glass, such as Figure 5 As shown; needle electrode 3 has a length of 20mm, a diameter of 0.9mm, and a hollow structure; the plate electrode 4 has a length and width of 80mm and a thickness of 0.7mm. The distance between the plate electrode 4 and the top of the spinning cell 7 is 40mm, and the plate electrode 4 There is a receiving curtain 5 with a width of 80mm and unlimited length at 0.5mm below.

[0031] Before spinning, weigh 1000 grams of polyvinylpyrrolidone (PVP K-30) powder, and dissolve it in a mixed solvent with a m...

Embodiment 3

[0033] This embodiment uses basically the same device and process as in embodiment 1, such as figure 1 Shown. The changes are: the height of the sprayer 1 is 60mm and the diameter is 16mm, the height of the pressure nozzle 15 of the sprayer 1 is 8mm, the diameter is 24mm, and the inclination angle of the pressure nozzle 15 is 20°, such as figure 2 , 3 , 4 and 8; the spinning pool 7 is circular, with a diameter of 60mm, a height of 80mm, and glass material, such as Figure 4 As shown; needle electrode 3 is 30mm in length, 0.6mm in diameter, solid structure; flat electrode 4 is 70mm in length and width, thickness is 1.5mm, the distance between flat electrode 4 and the top of spinning cell 7 is 30mm, flat electrode 4 There is a receiving curtain 5 with a width of 70mm and unlimited length at 1.5mm below.

[0034] Before spinning, weigh 500 grams of polyacrylonitrile polymer powder and mix it with the solvent dimethylformamide at a mass ratio of 12%. After heating in a water bath (50...

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Abstract

The invention discloses an electrostatic spinning device for preparing nanofibers. The device mainly comprises a liquid spraying device, an electrostatic generator, a needle electrode, a plate electrode, a spinning pond, a liquid storage tank and a receiving curtain, wherein the liquid spraying device is fixed at the bottom of the spinning pond to be connected with the liquid storage tank, the needle electrode is arranged at the bottom of the spinning pond to be connected with the electrostatic generator, the plate electrode is arranged above the spinning pond and is grounded, and the receiving curtain is arranged below the plate electrode. During spinning, a solution is fed into the liquid spraying device from the liquid storage tank at certain pressure and certain flow rate, and forms a petunia-shaped thin liquid film at the top end of the liquid spraying device, the electrostatic generator enables a static electric field to be formed between the needle electrode and the plate electrode, jet flow is formed at the top end of the liquid film and flies off, and is deposited on the receiving curtain to form a nanofiber felt, and a solution in the spinning pond is pumped back into the liquid storage tank. The electrostatic spinning device has the benefits that the structure is simple, the cost is low, a spinning solution can be recycled, the production efficiency is high, large-scale production of the nanofibers can be realized, and requirements on the nanofibers and relevant products of industrial production are met.

Description

Technical field [0001] The invention relates to an electrostatic spinning device capable of preparing nanofibers, which belongs to the technical field of textiles and new materials. Specifically, a liquid jet is used to spray a thin liquid film similar to a bellflower shape, and is used in a high-voltage electrostatic generator, an electrode and a receiving curtain. Under the joint action of the liquid film, multiple jets are generated at the top of the liquid film and finally form a device for nanofiber felt. Background technique [0002] Electrospinning technology is a technology that uses electrostatic force to generate a jet of polymer solution or melt and finally solidify into nanofibers. The main principle of this technology is to first make the polymer solution or melt form curved liquid droplets, liquid column films, bubbles, crater-like bulges, etc., and then use electrostatic force to eject a jet from the top of the curved surface. The jet flies to the negative plate u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00
Inventor 刘雍范杰康卫民程博闻刘健
Owner TIANJIN POLYTECHNIC UNIV
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