Electrostatic spinning method of free liquid-surface multi-nozzle arrangement

An electrospinning and multi-nozzle technology, which is applied in textiles and papermaking, filament/thread forming, fiber processing, etc., can solve the problems of unstable state of filament, electric field disturbance, poor spinning effect, etc., and achieve spinning effect Good, improve production efficiency, and stabilize the silk output state

Inactive Publication Date: 2019-01-04
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the output of a single nozzle is very limited, so it is necessary to combine and arrange such nozzles to truly meet the needs of industrialization and double the production efficiency
However, the mutual interference of the electric field at the edge of the nozzle will cause the electric field to be disturbed, the state of the filament will be unstable, and the spinning effect will be poor.

Method used

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  • Electrostatic spinning method of free liquid-surface multi-nozzle arrangement
  • Electrostatic spinning method of free liquid-surface multi-nozzle arrangement
  • Electrostatic spinning method of free liquid-surface multi-nozzle arrangement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Four nozzle arrangement. The electrospinning method of free liquid surface four nozzle arrangement, comprises the following steps:

[0033] Step 1: Align the four free surface nozzles according to the following figure 1 , 2 , The three positions shown in 3 are placed under the receiving device, and the free liquid surface at the top of the nozzle is 200mm away from the receiving device. The free surface nozzle adopts an umbrella-shaped nozzle with a diameter of 25mm, the distance between the nozzles is set to 30-70mm, and the running speed of the base cloth of the receiving device is set to 2m / min.

[0034] Step 2: Calculating the critical voltage value (minimum voltage value at which filaments can be produced) of each spray head from the liquid surface through electric field simulation.

[0035] Using the finite element simulation software to simulate the electric field of the arrangement of four free liquid surface nozzles under different nozzle spacing, the critic...

Embodiment 2

[0039] Arrangement of five nozzles. The electrospinning method of free liquid surface five nozzle arrangement, comprises the following steps:

[0040] Step 1: Align the five free surface nozzles according to Figure 4 , 5 , The three positions shown in 6 are placed under the receiving device, and the free liquid surface at the top of the nozzle is 200mm away from the receiving device. The free surface nozzle adopts an umbrella-shaped nozzle with a diameter of 25mm, the distance between the nozzles is set to 30-70mm, and the running speed of the base cloth of the receiving device is set to 2m / min.

[0041] Step 2: Calculating the critical voltage value (minimum voltage value at which filaments can be produced) of each spray head from the liquid surface through electric field simulation.

[0042] Using the finite element simulation software, the electric field simulation of five free liquid surface nozzle arrangements under different nozzle spacings was carried out to obtain ...

Embodiment 3

[0046] Nine nozzle arrangement. The electrospinning method of free liquid surface nine nozzle arrangement, comprises the following steps:

[0047] Step 1: Align the nine free surface nozzles according to the following Figure 7 , 8 The two positions shown are placed under the receiving device, and the free liquid surface at the top of the nozzle is 200mm away from the receiving device. The free surface nozzle adopts an umbrella-shaped nozzle with a diameter of 25mm, the distance between the nozzles is set to 30-70mm, and the running speed of the base cloth of the receiving device is set to 2m / min.

[0048] Step 2: Calculating the critical voltage value (minimum voltage value at which filaments can be produced) of each spray head from the liquid surface through electric field simulation.

[0049] Using the finite element simulation software to simulate the electric field of nine free liquid surface nozzle arrangements under different nozzle spacing, the critical voltage valu...

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Abstract

The invention provides the electrostatic spinning method of free liquid-surface multi-nozzle arrangement. There are more than three nozzles. Each free liquid-surface nozzle is placed below a receivingdevice. A free liquid-surface nozzle arrangement mode is formed based on three-nozzle arrangement. The three nozzles are arranged to form one basis unit. The formation of the basis unit is determined. One nozzle is added subsequently and is arranged in the mode of forming the basis unit with the arranged nozzles. And then, through an electric field, the critical voltage value of each free liquid-surface nozzle is simulated and calculated. A critical voltage is independently loaded on each free liquid-surface nozzle so that the free liquid surface of each free liquid-surface nozzle is completely excited to emit a plurality of jet flows, and the jet flows are drawn into a long and thin shape so as to form nanometer fibers which are received by receiving device base cloth. The multi-nozzle arrangement is adopted to carry out electrostatic spinning, production efficiency is greatly increased, and simultaneously, a wire output state is stable, a spinning effect is good, and the method canbe used for batch electrostatic spinning.

Description

technical field [0001] The invention relates to the technical field of electrospinning, in particular to an electrospinning method in which multiple nozzles are arranged on a free liquid surface. Background technique [0002] Electrospinning is a special form of electrostatic atomization of polymer fluids. At this time, the substances split by atomization are not tiny droplets, but tiny jets of polymers, which can run for a long distance and finally solidify into fibers. Electrospinning is a special fiber manufacturing process in which a polymer solution or melt is jet-spun in a strong electric field. Under the action of the electric field, the droplet at the needle will change from a spherical shape to a conical shape (that is, "Taylor cone"), and extend from the tip of the cone to obtain a fiber filament. In this way, polymer filaments with nanoscale diameters can be produced. [0003] The Chinese invention patent with the application number 201310032194.9 discloses an u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00
CPCD01D5/0069D01D5/0092
Inventor 覃小红毛宁王荣武俞建勇
Owner DONGHUA UNIV
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