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A spiral electrospinning nozzle with controllable curvature of spinning liquid and its use method

A technology of electrospinning and spinning liquid, which is applied in the fields of filament/thread forming, textile and papermaking, fiber treatment, etc. The problem of large free liquid surface and other problems can be achieved, and the effect of reducing solvent volatilization and simple and easy technology can be achieved.

Active Publication Date: 2021-08-31
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 spiral electrospinning nozzle with controllable curvature of the spinning solution, equipment installed with such a nozzle, and a method of use, so as to solve the problem that the surface of the spiral immersion type nozzle does not have the shape of the spinning solution. Constraints, the jet movement path is unstable during the spinning process, the free liquid surface of the spinning solution is too large, and the solvent of the spinning solution is volatile. At the same time, the precise design of the electric field and the curvature of the spinning solution during the electrospinning process is realized. Controlled to achieve mass production of narrowly distributed submicron fibers and nanofibers

Method used

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  • A spiral electrospinning nozzle with controllable curvature of spinning liquid and its use method
  • A spiral electrospinning nozzle with controllable curvature of spinning liquid and its use method
  • A spiral electrospinning nozzle with controllable curvature of spinning liquid and its use method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] 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 was 10%. The metal cylinder 5 is grounded 7, and the distance between the metal cylinder 5 and the helical electrospinning nozzle with controllable curvature of the spinning solution is adjusted to be 20cm; the drive motor 4 of the metal cylinder 5 of the receiving device is turned on, and the cylinder speed is set to 60r / min; set the rotation speed of the spiral electrospinning nozzle with controllable curvature of the spinning solution to 10r / min; turn on the switch of the high voltage generator 1, and slowly increase the voltage to 50KV; The liquid surface 11 is generated; the jet 3 flies to the metal drum 5 under the action of a high-voltage electrostatic field, the solvent volatilizes, and the jet 3 is stretched and solidified and deposited on the metal drum 5 to form a large number ...

Embodiment 2

[0044] This embodiment is similar to Example 1, except that: the mass fraction of the prepared PAN polymer solution is 12%; the distance between the metal cylindrical drum 5 and the spiral electrospinning nozzle with controllable curvature of the spinning solution is 18 cm; The rotation speed of the metal cylindrical drum 5 is 80r / min; the rotation speed of the helical electrospinning nozzle with controllable curvature of the spinning solution is 12r / min; the voltage of the high voltage generator 1 is 55KV.

Embodiment 3

[0046] This embodiment is similar to Example 1, except that: the mass fraction of the prepared PAN polymer solution is 14%; the distance between the metal cylindrical drum 5 and the spiral electrospinning nozzle with controllable curvature of the spinning solution is 22 cm; The rotation speed of the metal cylindrical drum 5 is 80r / min; the rotation speed of the helical electrospinning nozzle with controllable curvature of the spinning solution is 15r / min; the voltage of the high voltage generator 1 is 55KV.

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Abstract

The invention relates to a spiral electrospinning nozzle with controllable curvature of spinning liquid and its use method. The spiral electrospinning nozzle with controllable curvature of spinning liquid includes a spiral spinning cutter head and a helical spinning nozzle installed on the cutter head. Grooved casing. The spiral spinning cutter head is composed of a helix with a helical outline and a triangular cross-section and a cylindrical central axis; the spiral groove sleeve is composed of a helical wire with a helical spinning cutter outline and a non-closed isosceles cross-section with no upper bottom. It consists of a trapezoidal ring and a cylindrical central axis, which are arranged concentrically. The invention adopts the spiral groove sleeve made of polytetrafluoroethylene, which can prevent the curvature of the spinning solution on the surface of the spiral spinning cutter head from fluctuating significantly, and at the same time, does not interfere with the electric field of the spinning nozzle. This technology can stabilize the free liquid surface of the spinning solution, control the curvature of the spinning solution, reduce solvent volatilization, and realize the batch preparation of narrowly distributed submicron fibers and nanofibers without interfering with the regulation of the electric field.

Description

technical field [0001] The invention belongs to the technical field of nanofibers and textile machinery, and in particular relates to a helical electrostatic spinning nozzle with controllable curvature of spinning liquid 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 great development po...

Claims

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Application Information

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