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Porous spherical electrospinning nozzle and spinning method thereof

An electrospinning, porous spherical technology, applied in the directions of electrospinning, textile and papermaking, filament/thread forming, etc., can solve the problems of single nanofiber membrane structure and uncontrollable fiber multi-level diameter distribution, and achieve simple technology. easy effect

Inactive Publication Date: 2018-08-17
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a porous spherical electrospinning nozzle and its use method, which can solve the problem of uncontrollable multi-level fiber diameter distribution and single nanofiber membrane structure in the current batch electrospinning process, and realize controllable multi-stage electrospinning. One-step Batch Preparation of Nanofibers with Order Diameter Distribution

Method used

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  • Porous spherical electrospinning nozzle and spinning method thereof
  • Porous spherical electrospinning nozzle and spinning method thereof
  • Porous spherical electrospinning nozzle and spinning method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method of electrospinning:

[0031] The spinning solution 14 uses a polymer solution prepared from polyacrylonitrile (PAN) and N-N dimethylformamide (DMF) to prepare nanofibers with controllable multi-level diameter distribution. The mass fraction of the prepared PAN polymer solution is 10%.

[0032] The nozzle diameter is selected to be 60 mm; a hole 13 is distributed on the spherical surface 12; the holes 13 are uniformly and symmetrically distributed on the spherical surface 12, the number of holes 13 is 60, the diameter is 4 mm, and the depth is 10 mm. The hole 13 has a chamfered structure extending to the outer edge at the spherical surface 12, and the depth of the chamfered structure is 1mm.

[0033]The metal drum 7 is grounded 9, and the distance between the metal drum 7 and the porous spherical electrospinning nozzle 5 is adjusted to be 20cm; the motor 2 6 is turned on, and the rotating speed of the metal drum 7 is set to be 60r / min; the switch of the liquid ...

Embodiment 2

[0035] A method of electrospinning:

[0036] The spinning solution 14 uses a polymer solution prepared from polyacrylonitrile (PAN) and N-N dimethylformamide (DMF) to prepare nanofibers with controllable multi-level diameter distribution. The mass fraction of the prepared PAN polymer solution is 14%.

[0037] The nozzle diameter is selected to be 60mm; a hole 13 is distributed on the spherical surface 12; the holes 13 are evenly and symmetrically distributed on the spherical surface 12, the number of holes 13 is 60, the diameter is 6mm, and the depth is 10mm. The hole 13 has a chamfered structure extending to the outer edge at the spherical surface 12, and the depth of the chamfered structure is 1 mm.

[0038] The metal drum 7 is grounded 9, and the distance between the metal rotating drum 7 and the porous spherical electrospinning nozzle 5 is adjusted to be 22cm; the motor 2 6 is turned on, and the rotating speed of the metal drum 7 is set to be 80r / min; the switch of the li...

Embodiment 3

[0040] A method of electrospinning:

[0041] The spinning solution 14 uses a polymer solution prepared from polyacrylonitrile (PAN) and N-N dimethylformamide (DMF) to prepare nanofibers with controllable multi-level diameter distribution. The mass fraction of the prepared PAN polymer solution is 10%.

[0042] The nozzle diameter is selected to be 60 mm; a hole 13 is distributed on the spherical surface 12; the holes 13 are evenly and symmetrically distributed on the spherical surface 12, the number of holes 13 is 60, the diameter is 4 mm, and the depth is 5 mm. The hole 13 has a chamfered structure extending to the outer edge at the spherical surface 12, and the depth of the chamfered structure is 1 mm.

[0043] The metal drum 7 is grounded 9, and the distance between the metal drum 7 and the porous spherical electrospinning nozzle 5 is adjusted to be 16cm; the motor 2 6 is turned on, and the rotating speed of the metal drum 7 is set to 40r / min; the switch of the liquid suppl...

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Abstract

The invention discloses a porous spherical electrospinning nozzle and a spinning method thereof. The porous spherical electrospinning nozzle is a solid sphere with a smooth surface, and a plurality ofholes are distributed in the spherical surface; the porous spherical electrospinning nozzle is connected to a first motor through a transmission shaft, and the lower portion of the porous spherical electrospinning nozzle is immersed in a spinning solution of a liquid storage tank. The spinning method includes the steps of opening a receiving device; opening a liquid supply device and injecting the spinning solution into the liquid storage tank through a peristaltic pump; opening the first motor, so that the porous spherical electrospinning nozzle rotates in the spinning solution, and the spinning solution forms two states of liquid films on the spherical surface and hole surfaces respectively; opening a high-voltage generator, so that the liquid films on the spherical surface and the holesurfaces generate jet flow different in fineness respectively, and the jet flow is stretched, solidified and deposited on the receiving device to form nanofibers. The nanofibers with two or more kinds of diameter distribution can be prepared under the conditions of not using a plurality of spinning solutions and not adjusting spinning parameters.

Description

technical field [0001] The invention relates to a porous spherical electrostatic spinning nozzle and a spinning method thereof, belonging to the technical field of nanofibers and textile machinery. 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 potential in the fields of high-efficiency filtrati...

Claims

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Application Information

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IPC IPC(8): D01D5/00
CPCD01D5/0007D01D5/0069
Inventor 覃小红熊健王荣武吴媛媛
Owner DONGHUA UNIV
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