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A controllable free liquid surface mushroom head type electrospinning nozzle suitable for high-speed motion and its application method

An electrospinning, high-speed motion technology, applied in textile and papermaking, filament/thread forming, fiber processing, etc., can solve the problem of unstable free liquid surface, volatile solvent of spinning solution, Problems such as excessive free liquid level, to reduce solvent volatilization, the technology is simple and easy to implement

Active Publication Date: 2021-05-25
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a controllable free liquid surface mushroom head type electrospinning nozzle suitable for high-speed movement and its use method, so as to solve the instability of the free liquid surface in the batch electrospinning process of the current high-speed movement of the nozzle , the free liquid surface of the spinning solution to be spun is too large, and the solvent of the spinning solution to be spun is volatile. At the same time, the precise design and control of the electric field and the curvature of the spinning solution during the electrospinning process is realized, and the narrow distribution of submicron fibers and nanofibers is realized. batch preparation of

Method used

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  • A controllable free liquid surface mushroom head type electrospinning nozzle suitable for high-speed motion and its application method
  • A controllable free liquid surface mushroom head type electrospinning nozzle suitable for high-speed motion and its application method
  • A controllable free liquid surface mushroom head type electrospinning nozzle suitable for high-speed motion and its application method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Next, nanofibers are prepared by using a polymer solution prepared from polyacrylonitrile (PAN) and N-N dimethylformamide (DMF). The mass fraction of the prepared PAN polymer solution is 10%. Ground the metal drum 10, adjust the distance between the metal cylindrical drum 10 and the controllable free-surface mushroom head type electrospinning nozzle suitable for high-speed motion to be 20cm; adjust the spinning liquid curvature control module 13 and the polytetrafluoroethylene insulating seat 2 The relative height forms an annular slit channel 14 of a certain width to be 0.5mm; open the drive motor 9 of the metal cylindrical drum 10 of the receiving device, and set the rotating speed of the drum 10 to be 60r / min; open the switch of the liquid supply control device 16, and pass through the peristaltic pump Inject a certain amount of high polymer spinning solution 1 into the annular slit channel 14 until the surface solution is completely full; set the reciprocating speed...

Embodiment 2

[0051] This embodiment is similar to Embodiment 1, except that: the mass fraction of the prepared PAN polymer solution is 12%; the metal cylindrical drum 10 and the controllable free liquid surface mushroom head type electrospinning nozzle suitable for high-speed motion The distance of the spinning solution is adjusted to 18cm; the ring-shaped slit channel 14 of a certain width formed between the spinning solution curvature control module 13 and the polytetrafluoroethylene insulating seat 2 is 0.6mm; the rotating speed of the drum 10 is set to 80r / min; it is suitable for high-speed motion The reciprocating speed of the controllable free liquid surface mushroom head electrospinning nozzle is set to 1200mm / s; the voltage of the switch 4 of the high voltage generator is adjusted to 80KV.

Embodiment 3

[0053] This embodiment is similar to Embodiment 1, except that: the mass fraction of the prepared PAN polymer solution is 14%; the metal cylindrical drum 10 and the controllable free surface mushroom head type electrospinning nozzle suitable for high-speed motion The distance is adjusted to 25cm; the ring-shaped slit channel 14 of a certain width formed between the spinning solution curvature control module 13 and the polytetrafluoroethylene insulating seat 2 is 0.7mm; the rotating speed of the drum 10 is set to 90r / min; it is suitable for high-speed motion The reciprocating speed of the controllable free liquid surface mushroom head electrospinning nozzle was set to 1500mm / s.

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Abstract

The invention relates to a controllable free liquid surface mushroom head type electrostatic spinning nozzle suitable for high-speed movement and its use method. The controllable free liquid surface mushroom head type electrostatic spinning nozzle suitable for high-speed movement includes a bowl-shaped metal The nozzle module, the spinning solution curvature control module, the spinning solution fluid form control module and the installation adjustment device. The invention adopts the spinning liquid fluid shape control module and the spinning liquid curvature control module made of polytetrafluoroethylene, which can restrain the spinning liquid curvature on the surface of the nozzle during the movement of the nozzle without significant fluctuations, and at the same time do not interfere with the electric field of the spinning nozzle . This technology can stabilize the free liquid surface of the spinning solution without interfering with the regulation of the electric field, control the curvature of the spinning solution, reduce solvent volatilization, and can adapt to the high-speed movement of the nozzle, and realize the narrow distribution of sub-micron fibers and nanofibers during the high-speed movement of the nozzle. batch preparation.

Description

technical field [0001] The invention belongs to the technical field of nanofibers and textile machinery, and in particular relates to a controllable free-surface mushroom-head electrostatic spinning nozzle suitable for high-speed motion and a use method thereof. Background technique [0002] When polymer fiber diameters are reduced from the micrometer scale to the submicrometer or nanometer scale, a surprising set of properties emerges. Such as a very large volume specific surface area, the volume specific surface area of ​​nanofibers is basically 1000 times that of microfibers; it can be flexibly functionalized on the surface; it shows superior effects and mechanical properties compared with other known material forms, such as surface And interface effect, small size effect, quantum size effect and quantum tunneling effect and stiffness, tensile strength, etc. These outstanding properties make nanofibers the material of choice for many important applications, and have grea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00
Inventor 覃小红熊健王荣武
Owner DONGHUA UNIV