Continuous mass production method and continuous mass production equipment for electrospun nanofiber membranes

An electrospinning nanofiber, mass production technology, applied in fiber processing, textiles and papermaking, non-woven fabrics, etc., can solve problems such as easy blockage of capillaries, droplets splashing on fiber receiving nets, and inability to realize industrialized production of nanofibers, etc. Achieve the effect of improving uniformity and productivity and overcoming electrostatic repulsion

Inactive Publication Date: 2012-08-29
谢维
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of all the above-mentioned methods and devices for producing nanofibers is that only a very small amount of polymer material can be produced in a certain time interval. About one spinneret can only process about 0.5 grams of polymer in one hour, which cannot be achieved. Industrial production of nanofibers
[0007] In addition, although Chinese patents 200810032247, 200810039299, and 200710036447 have improved spi

Method used

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  • Continuous mass production method and continuous mass production equipment for electrospun nanofiber membranes
  • Continuous mass production method and continuous mass production equipment for electrospun nanofiber membranes
  • Continuous mass production method and continuous mass production equipment for electrospun nanofiber membranes

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Using polyvinylidene fluoride as the solute, dimethylformamide and acetone as the solvent, make a polymer solution with a mass concentration of 7%, and put it into figure 1container 9 in the device. The polymer solution flows into the container 9 through the inlet 8, and flows out through the outlet 15, so that the level of the polymer solution 10 in the container 9 is maintained by using the position of the outlet 15, and the charged electrode 11 is controlled by figure 2 The porous metal plate in the embodiment of d is composed, and it vibrates horizontally at a frequency of 0.2HZ, and the amplitude is 5cm. The charged electrode 11 is connected to a 35 kV DC voltage source, and the device follows the figure 1 Manufactured and placed in it is a gas-permeable continuous receiving web 20 which is drawn close to the counter electrode 21 due to the low pressure in the negative pressure chamber 19 behind the gas-permeable counter electrode 21, thus forming a continuous re...

Embodiment 2

[0039] Using polyvinylidene fluoride as the solute, dimethylformamide and acetone as the solvent, make a polymer solution with a mass concentration of 8%, and put it into figure 1 container 9 in the device. The polymer solution flows into the container 9 through the inlet 8, and flows out through the outlet 15, so that the level of the polymer solution 10 in the container 9 is maintained by using the position of the outlet 15, and the charged electrode 11 is controlled by figure 2 The expanded metal in the embodiment of b is composed, and it vibrates horizontally at a frequency of 1kHZ with an amplitude of 4mm. The charged electrode 11 is connected to a 50 kV DC voltage source, and the device follows the figure 1 Manufactured and placed in it is a gas-permeable continuous receiving web 20 which is drawn close to the counter electrode 21 due to the low pressure in the negative pressure chamber 19 behind the gas-permeable counter electrode 21, thus forming a continuous receivi...

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Abstract

The invention relates to a continuous mass production method and continuous mass production equipment for electrospun nanofiber membranes. The method comprises the following steps: (1), electrified electrodes are kept in a vibrating state to drive polymer liquor to a plurality of protrusions on the upper surfaces of the electrified electrodes, so as to form a Taylor cone, and ensure that the whole upper surfaces become spinning surfaces, which obtains high spinning production capacity; (2), air in the space between two electrodes is sucked to the back side of a counter electrode to generate an air flow, so that stressed drift of nanofiber is accelerated, and the nanofiber is sucked to be laid on a continuous receiving screen to form a membrane; and (3) the air flow is heated dry hot air. The equipment comprises a polymer container, the vibrating electrified electrodes, the continuous receiving screen, the counter electrode and a negative pressure chamber, wherein the upper surfaces of the vibrating electrified electrodes are approximately in accordance with the liquid level; the counter electrode is made of a metal mesh or a porous metal plate; the negative pressure chamber comprises a hood, a rear air chamber, a balancing plate and an air suction pump; each vibrating electrified electrode is a metal mesh-shaped plane or a porous metal flat plate; innumerous holes and innumerous small protrusions are formed on the plane; and the small protrusions are regularly arranged and higher than the plane. The invention facilitates mass production of the electrospun nanofiber membranes.

Description

technical field [0001] The present invention relates to a method and apparatus for the continuous mass production of nanofibrous membranes from polymer solutions in an electric field. Background technique [0002] The use of electrospinning to manufacture nanometer-sized fibers is not the latest technology. Formhals proposed related patents as early as 1934. However, due to the lack of equipment-related conditions at that time, it has not been taken seriously until the global nano-boom in recent years. It has been extensively discussed and researched and developed by the academic circles. [0003] Electrospinning equipment is not complicated, mainly including injection motor, solution conduit, spinneret, voltage supply and a fiber collection carrier. The technical feature is to control the transmission speed of the polymer solution or melt with a motor, and push the polymer solution to the end of the capillary. Since a high-voltage electrostatic field (10000-50000 volts) is...

Claims

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Application Information

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IPC IPC(8): D04H1/728D01D5/00
Inventor 谢维
Owner 谢维
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