Saw tooth type needle-free electrostatic spinning device

An electrospinning, needle-free technology, applied in textiles and papermaking, spinneret assemblies, filament/thread forming, etc., can solve problems such as inconvenient cleaning, needle blockage, electrostatic interference, etc., to avoid energy waste and reduce Effects of reducing power loss and impact

Active Publication Date: 2012-12-19
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a sawtooth type needle-free electrospinning device, which can greatly increase the output of nanofiber products and product Uniformity, and avoid the electrostatic interference (“End effect” phenomenon), needle blockage and inconvenient cleaning in the traditio

Method used

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  • Saw tooth type needle-free electrostatic spinning device
  • Saw tooth type needle-free electrostatic spinning device
  • Saw tooth type needle-free electrostatic spinning device

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A rack with an isosceles triangle at the top of the teeth is used as the electrospinning unit, which is combined into a single rack helical electrospinning assembly (see figure 2 ) for needle-free multi-jet tip electrospinning. The spin pack was 30 cm long and 20 cm in diameter. The rotating speed of the spinning assembly is 5rev / min, the voltage is 20kV+2kV (the output voltage of the positive high-voltage power supply is 20kV, and the output voltage of the negative high-voltage power supply is 2kV), the receiving distance is 15cm, and the PVA nanometer with an average diameter of 115nm and CV=12% is obtained. Fiber film.

Embodiment 2

[0030] A rack with an isosceles triangle at the tooth top is bent into a circle with a diameter of 20 cm as the electrospinning unit, and combined into a serial circular rack electrospinning assembly (see Figure 5 ) for needle-free multi-jet electrospinning. The length of the spinning assembly is 30cm, the speed is 5rev / min, there are 5 circular rack spinning heads evenly distributed, the spinning voltage is 26kV, the receiving distance is 15cm, and the average diameter is 98nm, CV=10% PVA nano fiber.

Embodiment 3

[0032] A rack with an isosceles triangular tooth top is used as the electrospinning unit, and a parallel multi-rack electrospinning assembly with a separated central axis is adopted (see Figure 4 ) for multi-jet electrospinning. The length of the spinning assembly is 30cm, and there are 6 metal racks on it, which are arranged parallel to each other and equidistant from the center line. The spinneret diameter was 20 cm. Two synchronous motors are used to drive the spinning assembly to rotate slowly at a speed of 5 rev / min. The voltage is 28kV, the receiving distance is 15cm, and the PVA nanofibers with an average diameter of 105nm and CV=9% are obtained.

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Abstract

The invention discloses a saw tooth type needle-free electrostatic spinning device, which comprises a liquid supply system, a spinning system, a power supply system, a receiving system, a transmission system and a control system. The device is characterized in that the spinning system comprises a spinning manifold body, a spinning component and a center shaft; the exterior of the spinning manifold body has a horizontal cuboidal shape, and a horizontal cylindrical cavity is formed in the spinning manifold body; a main body of the center shaft is arranged in the cavity, and the two ends of the center shaft extend from the spinning manifold body, and are connected with the transmission system; the spinning component has an axially continuous or parallel thin rack structure, and points of a rack are outwards arranged on the center shaft, and can be driven by the center shaft to rotate; distances of 1 to 3mm are reserved between the points and the inner wall of the spinning manifold body; a liquid inlet pipe orifice of the spinning manifold body is communicated with a spinning metering pump of the liquid supply system, and an overflow port of the spinning manifold body is connected to a liquid storage device of the liquid supply system through a pipe, and is reserved between the bottom of the spinning component and the center shaft; and rectangular spinning openings are reserved in positions opposite to the highest parts of the spinning component on the upper surface of the spinning manifold body.

Description

technical field [0001] The invention relates to electrostatic spinning technology, in particular to a zigzag type needle-free electrostatic spinning device. Background technique [0002] Electrospinning technology is a technology that uses electrostatic field force to produce nanofiber materials, which has been widely studied at home and abroad in recent years. The main process principle is: under the action of a high-voltage electrostatic field, the pendant small droplet at the capillary mouth emits a fine jet from the top under the action of electrostatic force. When the jet is flying to the receiving device, the solvent volatilizes and solidifies into fibers. Electrospinning technology is divided into two categories: needle-type and needle-free. Multi-needle or multi-nozzle electrospinning technology is a method of electrospinning using capillary tubes, which is considered to be an effective method to achieve large-scale production of nanofiber materials. A representati...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01D13/02D01D4/02
CPCD01D5/0069
Inventor 刘延波刘健张泽茹马营陈威亚
Owner TIANJIN POLYTECHNIC UNIV
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