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Electrospinning device for dynamically controlling curvature of spinning solution and application method for electrospinning device

An electrospinning, dynamic control technology, applied in electrospinning, textile and papermaking, filament/thread forming, etc., can solve the problems of uncontrollable solution curvature and volatile solution to be spun, and achieve stable and controllable production. , the effect of optimizing the critical voltage and expanding the range

Active Publication Date: 2017-12-15
DONGHUA UNIV
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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 free liquid surface electrospinning device with dynamic control of the curvature of the spinning solution and its use method, to solve the problem that the solution curvature is uncontrollable in the current free liquid surface electrospinning process, and the solution to be spun is volatile and other issues, broaden the use of high-viscosity, high-volatility spinning liquid in free liquid surface electrospinning technology

Method used

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  • Electrospinning device for dynamically controlling curvature of spinning solution and application method for electrospinning device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Such as figure 1 As shown, an electrospinning device with dynamic control of spinning solution curvature provided in this embodiment includes a solution supply system, an electric field control system, a spinning solution curvature control system and a nanofiber collection system.

[0053] The liquid supply system includes a liquid storage tank 3 , a peristaltic propulsion pump 1 , a peristaltic propulsion pump 2 2 , and a catheter 24 . The catheter 24 is connected to the liquid storage tank 3 and the first disc nozzle 18, the second disc nozzle 19, the third disc nozzle 20, the peristaltic propulsion pump 1, and the peristaltic propulsion pump 2 2 The peristaltic extrusion spinning solution enters the nozzle quantitatively.

[0054] The electric field control system is composed of multiple sets of disc nozzles made of metal. The first disc nozzle 18 is made of metal, which is connected to the positive pole of the high voltage generator 4 through the conductive rod 6 ....

Embodiment 2

[0089] Narrowly distributed nanofibers were prepared using a polymer solution configured with polyacrylonitrile (PAN) and N-N dimethylformamide (DMF):

[0090] Configure the mass fraction of the PAN polymer solution to be 10%. Build a four-layer device, each layer is a dish-shaped disc nozzle made of metal; inject the prepared polymer solution into the liquid storage tank 3; open the screw distance control device for each layer, set the end position of the insulating screw rod so that each The layer spacing is equal to 5mm; turn on the peristaltic propulsion pump 1, peristaltic propulsion pump 2 2, etc. to supply liquid to the dish-shaped disc nozzle until the liquid level between the layers is close to full; adjust the height of the metal cylinder 15 so that the horizontal plane of the central axis is in line with the The distance between the upper surface of the disc-shaped disc nozzle on the top layer is 20cm; turn on the motor three 13 and set the rotating speed to be 80r / ...

Embodiment 3

[0092] Multi-level narrow distribution nanofibers were prepared using a polymer solution configured with polyacrylonitrile (PAN) and N-N dimethylformamide (DMF):

[0093] Build a six-layer device, each layer is a disc-shaped disc nozzle made of metal; inject the prepared polymer solution into the liquid storage tank 3; turn on the peristaltic propulsion pump 1, peristaltic propulsion pump 2, etc. The disc nozzle supplies liquid until the liquid level between each layer is close to full; open the screw distance control device of each layer, set the end position of the insulating screw rod so that the distance between each layer is equal to 8mm, and make the edge curvature of the spinning liquid be the set value; adjust The height of the metal drum 15 is such that the distance between the horizontal plane of the central axis and the upper surface of the uppermost dish-shaped disc nozzle is 18cm. Turn on the motor three 13 and set the rotating speed to 70r / min; turn on the high vo...

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Abstract

The invention discloses an electrospinning device for dynamically controlling the curvature of a spinning solution and an application method for the electrospinning device. The electrospinning device comprises a solution supply system, an electric field control system, a spinning solution curvature regulating system and a nanofiber collecting system. The application method for the electrospinning device comprises the steps of adopting a first electrospinning method to regulate the curvature of the spinning solution to a constant value so as to produce a narrowly distributed nanofiber product, adopting a second electrospinning method to regulate the dynamic change of the curvature of the spinning solution so as to produce a multistage narrowly distributed nanofiber product, or adopting a third electrospinning method to control an electric field and regulate the curvature of the spinning solution so as to produce the narrowly distributed nanofiber product simultaneously. According to the electrospinning device for dynamically controlling the curvature of the spinning solution and the application method for the electrospinning device, since the spinning solution curvature regulating system is adopted, precise control over the curvature of the edge of the spinning solution can be achieved, the regulation of a batch free solution level spinning process can be achieved, and the critical voltage required for the free liquid surface for electrospinning can be reduced; besides, batch, stable and controllable production of the nanofiber products can be achieved, the curvature of the edge of the spinning solution can be dynamically regulated, and one-step production of aggregation of the multistage narrowly distributed nanofiber product is achieved.

Description

technical field [0001] The invention belongs to the technical field of nano electrospinning and textile machinery, and in particular relates to a free liquid surface electrospinning device with dynamic control of the 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 ...

Claims

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Application Information

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IPC IPC(8): D01D5/00
CPCD01D5/003D01D5/0069D01D5/0092
Inventor 覃小红熊健
Owner DONGHUA UNIV
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