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A double annular slit electrospinning device and method

An electrospinning, annular technology, applied in textile and papermaking, filament/thread forming, fiber processing, etc., can solve the problems of non-oriented nanofiber product structure, insufficient solution utilization, and low nanofiber yield, etc. Achieve the effects of industrialized preparation, easy volatilization of solvents, and simple assembly

Inactive Publication Date: 2018-01-02
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the solvent is easily volatilized in large quantities in the current needle-free electrospinning process, the solution is not fully utilized, the output of nanofibers is low, and the structure of the final nanofiber product has no orientation, etc.

Method used

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  • A double annular slit electrospinning device and method
  • A double annular slit electrospinning device and method
  • A double annular slit electrospinning device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Prepare nanofibers by preparing polymer solution with polyacrylonitrile (PAN) and N,N dimethylformamide (DMF):

[0035] The mass fraction of the prepared PAN polymer solution was 10%. Put the configured PAN polymer solution into the syringe 11, set the distance from the main shaft of the metal roller 4 to the upper plane of the double-circular slit nozzle system to 300mm, turn on the speed regulating motor 5, and drive the metal roller 4 Rotate, adjust the rotating speed of the metal roller to 50r / min, the polymer solution flows into the tiny channel 9-2 inside the inner core 9 through the infusion tube 10, and finally enters the slit; turn on the high-voltage electrostatic generator 1, slowly increase the voltage, when the voltage After exceeding a certain value, multiple jets 6 will appear in the slit, the solvent of the jets 6 will volatilize during flight, and the high polymer will solidify to form nanofibers and deposit on the metal roller 4 .

Embodiment 2

[0037] The difference from Example 1 is that the rotational speed of the metal roller is 300r / min.

Embodiment 3

[0039] The difference from Example 1 is that the rotational speed of the metal roller is 800r / min.

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Abstract

The invention discloses a double-circular-ring-shaped slit type electrostatic spinning device and method. The electrostatic spinning device comprises a liquid supply system, a double-circular-ring-shaped slit type nozzle system and a nano fiber collection system. The electrostatic spinning method comprises the following steps of: starting a microinjection pump to enable a solution to flow into a slit between an inner ring and an outer ring through a micro-channel in an inner core; adjusting the flow of the solution to enable a liquid surface of the solution to fully overflow in the slit, but not flow out; starting a speed regulating motor to enable a metal roller to rotate normally; starting a high-voltage electrostatic generator and slowly increasing voltage; when the voltage exceeds a certain value, forming a plurality of jet flows in the slit; in a process that the jet flows fly to the metal roller, volatilizing a solvent and curing a high polymer to form nano fibers which are deposited on the metal roller; and rotating the metal roller to collect the nano fibers. By adopting the microinjection pump and the liquid supply system, a high polymer solution can be automatically and accurately supplied, and the solution is sufficiently and efficiently utilized, so that the yield of the nano fibers is improved and continuous preparation of the nano fibers is realized.

Description

technical field [0001] The invention belongs to the technical field of nano electrospinning and textile machinery, and in particular relates to a double-circular slit electrospinning device and method. Background technique [0002] Electrospinning technology is one of the effective methods for preparing nanofiber materials. Due to its simple device, convenient operation and adjustable nanofiber products, it has always been favored by researchers. At this stage, with the rise and rapid development of nanomaterials science, the preparation of nanofibers by electrospinning has become a research hotspot in the field of engineering materials science. Compared with traditional fiber materials, nanofiber materials exhibit excellent characteristics, such as surface and interface effects, small size effects, quantum size effects and quantum tunneling effects, so nanofiber materials are also widely used in fields such as filter materials, Tissue engineering scaffold materials, medica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00
CPCD01D5/0069D01D5/0076
Inventor 覃小红魏亮
Owner DONGHUA UNIV
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