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Ultrasonic oscillation electrostatic spinning nozzle and method

An electrospinning and ultrasonic technology, which is used in spinneret assemblies, textile and papermaking, filament/thread forming, etc., can solve problems such as difficult maintenance, clogging of spinneret holes, surface stickiness, etc., to improve production efficiency , the effect of improving stability and increasing yield

Inactive Publication Date: 2011-10-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the diameter of the needle-type spinneret hole is mostly in the micron level, and it is easy to block the spinneret hole due to solvent volatilization or too fast solidification of the melt, resulting in production interruption, which affects production efficiency, and is not easy to maintain
At present, the open-up spinneret studied by some scholars has improved the needle spinneret to a certain extent, but there are still many deficiencies, such as the direct contact of the polymer solution or melt with the air, which will be caused by the volatilization of the solvent or the solidification of the melt. The surface of the polymer solution or melt is viscous, which makes it difficult to draw out, and it is difficult to form a stable jet under the same parameter conditions, which affects the smooth progress of the spinning process

Method used

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  • Ultrasonic oscillation electrostatic spinning nozzle and method
  • Ultrasonic oscillation electrostatic spinning nozzle and method
  • Ultrasonic oscillation electrostatic spinning nozzle and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: This embodiment relates to an ultrasonic vibration electrospinning nozzle, such as figure 1 As shown, it includes a spinneret 1 and an ultrasonic processor, wherein the ultrasonic processor includes a horn 2 , a transducer 3 and a controller 4 . The top end of the horn 2 is inserted into the spinneret 1 through the bottom surface of the spinneret 1 , and the bottom end of the horn 2 is connected with the transducer 3 . The transducer 3 is connected to the controller 4, and the spinneret 1 is provided with a terminal 6 connected to the high-voltage positive electrode 5, and the spinneret 1 can be directly connected to the high-voltage positive electrode 5 through the terminal 6 to provide spinning solution or The melt is uniformly charged to provide the conditions. The controller 4 controls the ultrasonic pulse state and ultrasonic time, so that the spinning solution or melt injected into the spinneret 1 oscillates, makes the solution or melt in a dynamic ...

Embodiment 2

[0028] Embodiment 2: This embodiment also relates to an ultrasonic oscillating electrospinning nozzle. This embodiment is roughly the same as Embodiment 1, the difference being that the electrospinning nozzle involved in this embodiment also includes a shielding cover 7 . The horn 2 is divided into an upper half and a lower half, the spinneret 1 and the upper half of the horn 2 are arranged above the shield 7, and the lower half of the horn 2 and the transducer 3 are arranged on Below the shield. Wherein, the upper half of the horn 2 is made of insulating resin (such as PVC resin, EVA resin, etc.), and the lower half of the horn 2 is made of metal materials (such as copper, silver, etc.). In this embodiment, by installing a shielding cover outside the horn 2 and the transducer 3, the interference of the electric field on the electrospinning can be shielded, thereby ensuring the quality of the electrospinning.

Embodiment 3

[0029]Embodiment 3: This embodiment relates to a method of ultrasonic vibration electrospinning, comprising the following steps: (1) adding spinning solution to the spinneret through an automatic infusion device, and keeping the liquid volume of the injected spinning solution higher than The top of the horn is slightly horizontal. Wherein, the spinning solution is an aqueous solution of polyvinyl alcohol (PVA) with a mass concentration of 10%. (2) Place the receiving base cloth on the upper end of the spinneret with a distance of 20 cm. (3) Turn on the controller, turn on the time start / stop button, and set the ultrasonic time to 30 minutes, and select the continuous ultrasonic state. Under the mechanical effect of ultrasonic waves and cavitation, the horn oscillates the spinning solution to make it flow dynamically. (4) Connect the terminal on the spinneret to the high-voltage positive electrode, and adjust the voltage of the high-voltage positive electrode to 60kV. (5) Th...

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Abstract

The invention relates to an ultrasonic oscillation electrostatic spinning nozzle, which comprises a spinning nozzle and an ultrasonic processor, wherein the ultrasonic processor comprises an amplitude transformer, a transducer and a controller; the top of the amplitude transformer passes through the bottom of the spinning nozzle and is placed in the spinning nozzle; the bottom end of the amplitude transformer is connected with the transducer; the transducer is connected with the controller; and the spinning nozzle is of an open disc, and the spinning nozzle is provided with a binding post connected with a high-voltage positive electrode. The invention also relates to an electrostatic spinning method, which comprises the following steps of: adding spinning solution or melt into the spinning nozzle through an automatic transfusion device, keeping the liquid level of the injected spinning solution or melt higher than the horizontal plane of the top of the amplitude transformer, starting the controller and a high voltage, forming a Taylor cone through the spinning solution or melt under the action of ultrasonic oscillation, and upwards extracting the jet. The surface tension of the spinning solution or melt is overcome, multiple pieces of jet are formed, the yield of electrostatic spinning is increased, the spinning stability of the spinning nozzle is improved, and continuous and large-scale production of nano fibers can be realized.

Description

technical field [0001] The invention relates to the field of electrostatic spinning, in particular to an ultrasonic vibration electrostatic spinning nozzle and a method thereof. Background technique [0002] Electrospinning is a relatively popular simple method for manufacturing nanofibers. It has become a hot spot in the current research on nanofiber manufacturing due to its excellent characteristics such as simple equipment, easy operation, wide source of materials, and no damage to the material body during the process. The nanofibers produced by electrospinning have the characteristics of small diameter and large specific surface area, and have great application potential in the fields of biomedicine, air filtration, and protective clothing. [0003] Electrospinning is to bring the polymer solution or melt to thousands or even tens of thousands of volts of high-voltage static electricity, and the charged droplets form a Taylor cone under the action of the electric field f...

Claims

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Application Information

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IPC IPC(8): D01D4/00D01D4/02D01D5/00
Inventor 覃小红王衍书吴韶华
Owner DONGHUA UNIV
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