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Method for preparing micro/nanofibers through electric vibration and magnetic coupling

A nanofiber and magnetic coupling technology, applied in fiber processing, fiber chemical characteristics, electrospinning, etc., can solve problems such as low efficiency and poor spinning effect, achieve convenient operation, improve spinnability, and increase experimental efficiency and the effect on yield

Pending Publication Date: 2021-08-06
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above technical problems of poor spinning effect and low efficiency in the prior art, the present invention provides a method for preparing micro / nano fibers by electro-vibration-magnetic coupling. Micro / nano fiber equipment for preparation, the specific steps are:

Method used

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  • Method for preparing micro/nanofibers through electric vibration and magnetic coupling
  • Method for preparing micro/nanofibers through electric vibration and magnetic coupling
  • Method for preparing micro/nanofibers through electric vibration and magnetic coupling

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preparation example Construction

[0040] A method for preparing micron / nanofibers by electro-vibration-magnetic coupling, the method is prepared by using electro-vibration-magnetic coupling to prepare micron / nanofibers, and the specific steps are:

[0041] (1) Prepare the original solution

[0042] Add a certain amount of solute A to a certain amount of solvent B, heat and stir for 1-5 hours until completely dissolved, and then let it stand for 5-10 hours until it is completely transparent, ensuring that the concentration of the A solution is 5.0%-35.0%;

[0043] (2) Allocation of equipment

[0044]Prepare micro / nanofiber equipment by means of electro-vibration and magnetic coupling, set the inner diameter of the nozzle, the vibration frequency and power of the vibration unit, where the distance between the nozzle and the receiving plate is 10-20 cm, and the voltage of the high-voltage power supply device 2 is 15-20kV; The coil 10 is 5-20 centimeters apart from the liquid reservoir 7, and the magnetic field s...

Embodiment 1

[0060] A device preparation method for preparing micro / nano fibers by an electro-vibration-magnetic coupling process, comprising the following steps:

[0061] (1) A certain amount of solute A, which can be PAN, is added to a certain amount of B solvent, which can be DMF, heated and stirred for two hours to completely dissolve, then left to be completely transparent for six hours, to ensure that the concentration of the PAN solution is 18%.

[0062] (2) Transfer the PAN solution to the independent liquid tank of the liquid storage tank 7 respectively. The inner diameter of the nozzle 1 is 0.4 mm. The frequency of the vibration bar is set to 20kHz, and the power is 1400w. The distance between the receiving plate 11 and the nozzle 1 is 20 cm, and the voltage of the high-voltage power supply device 2 is 20 kV. The distance between the coil 10 and the liquid reservoir 7 is 10 cm, and the magnetic field strength is 1T.

[0063] (3) The position of the liquid level is sensed by t...

Embodiment 2

[0066] A device preparation method for preparing micro / nano fibers by an electro-vibration-magnetic coupling process, comprising the following steps:

[0067] (1) A certain amount of solute A, which can be PAN, is added to a certain amount of B solvent, which can be DMF, heated and stirred for two hours to completely dissolve, then left to be completely transparent for six hours, to ensure that the concentration of the PAN solution is 5%, configure the concentrations as 9.5% and 12% in the same way.

[0068] (2) Transfer the PAN solution to the independent liquid tank of the liquid storage tank 7 respectively. The inner diameter of the nozzle 1 is 0.86 mm. The frequency of the vibration bar is set at 25kHz, and the power is 900w. The distance between the receiving plate 11 and the nozzle 1 is 10 cm, and the voltage of the high-voltage power supply device 2 is 15 kV. The distance between the coil 10 and the liquid reservoir 7 is 10 cm, and the magnetic field strength is 5T. ...

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Abstract

The invention provides a method for preparing micro / nanofibers through electric vibration and magnetic coupling. Equipment for preparing micro / nanofibers through electric vibration and magnetic coupling is adopted for preparation in the method. The method comprises the following specific steps of adding a certain amount of solute A into a certain amount of solvent B, and carrying out heating and stirring for 1-5 hours until the solute A is completely dissolved; injecting a solution into a liquid storage tank, sensing a liquid level position through a liquid level sensor and feeding back the liquid level position to a controller, and then injecting an original solution into a liquid injection pump in real time by a controller; transferring a solution A into independent liquid tanks of the liquid storage tank; and setting electrostatic spinning process parameters, so that the nanofibers of A can be continuously obtained. According to the method, a vibration field and a magnetic field are arranged for the first time, and the vibration field, the magnetic field and an electric field are superposed; a vibration unit is connected with the controller and placed in the liquid storage tank, the viscosity of a spinning solution is reduced through vibration, and therefore the spinnability of a few high-viscosity spinning solutions is improved; and the solution is homogenized through the magnetic field, so that spinning is smoother, and the phenomenon of head blocking is reduced.

Description

technical field [0001] The invention belongs to the technical field of electrospinning, and in particular relates to a preparation method for increasing vibration field magnetic field coupling in electrospinning, in particular to a preparation method for preparing micro / nano fibers by electro-vibration-magnetic coupling. Background technique [0002] In the past ten years, high-concentration spinning solution can not only improve the preparation efficiency of nanofibers, but also help to improve the mechanical properties of the spun fibers. Studies have shown that the strength of fibers prepared by electrospinning increases with the increase in the concentration or viscosity of the spinning solution, but high-concentration spinning solutions generally have higher viscosity and low fluidity, and require extremely high electric field force to dissolve the spinning solution. In addition, the high-concentration spinning liquid is easy to volatilize and solidify at the spinneret ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D4/04D01F6/18
CPCD01D5/0061D01D5/0092D01D5/003D01D4/04D01F6/18
Inventor 陈舟李辉孙后环季国靖曹圣达刘科众潘新尹吴桐孔禹翔
Owner NANJING TECH UNIV