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Polymer superfine fibre wet electrostatic spinning method

An electrospinning and ultra-fine fiber technology, applied in the field of electrospinning, can solve the problems of environmental pollution, waste of raw materials, inability to have volatility, etc. Effect

Inactive Publication Date: 2009-06-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The limitation of this method is that it has specific requirements for the solvent of the spinning solution and cannot be volatile
In the electrospinning process using the traditional method, certain toxic organic solvents volatilize, which causes waste of raw materials on the one hand, and causes environmental pollution due to toxic substances in the air on the other hand.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 1g PHBV and dissolve it in 9g CH 3 Cl, fully stirred to make it fully dissolved, to obtain a uniform 10% PHBV / CH 3 Cl spinning solution.

[0023] Then the wet electrospinning method was adopted. The diameter of the spinneret hole is 0.7 mm, and the spinneret is immersed in 100 cs of simethicone oil spinning medium, and the aluminum foil receiving plate is placed in the spinning medium, and the receiving distance is kept at 10 cm. The temperature of the spinning medium is 25° C., and the electrospinning is started at a static voltage of 6 kV to obtain a fiber mat with continuous fibers.

[0024] The fiber mat obtained by electrospinning is washed with ethyl acetate, washed 3-5 times, dried in a vacuum oven, and finally a fiber mat with a fiber diameter of about 20um is obtained.

[0025] Atmospheric pressure fractional distillation is carried out on the mixed liquid of spinning medium and solvent, and the fraction CH at 70°C is collected 3 Cl, the remaining liq...

Embodiment 2

[0027] Weigh 1 g of cellulose diacetate, dissolve it in 9 g of acetone, stir well to fully dissolve it, and obtain a uniform 10% cellulose diacetate / acetone spinning solution.

[0028] Then the wet electrospinning method was adopted. The diameter of the spinneret hole is 0.7 mm. The spinneret is immersed in 10 cs of glycerol triacetate spinning medium, the roller receiver is placed in the spinning medium, and the receiving distance is kept at 10 cm, and the roller speed is 500 m / min. The temperature of the spinning medium is 25° C., and the electrospinning is started at a static voltage of 10 kV to obtain a fiber mat with continuous fibers.

[0029] The fiber mat obtained by electrospinning is washed with ethanol for post-treatment, washed 3-5 times, dried in a vacuum oven, and finally a fiber mat with a fiber diameter of about 10um is obtained.

[0030] The mixed liquid of the spinning medium and the solvent is subjected to normal pressure fractionation, and the fraction of ...

Embodiment 3

[0032] Weigh 1g of PAN, dissolve it in 9g of DMF, stir well to fully dissolve it, and obtain a uniform 10% PAN / DMF spinning solution.

[0033] Then the wet electrospinning method was adopted. The diameter of the spinneret hole is 1mm, and the spinneret is inclined upward at 45° and immersed in 20cs of pure higher fatty acid spinning medium, and the roller receiver is placed in the air 5cm above the spinning medium, and the total receiving distance is kept at 10cm. The cylinder rotating speed is 500m / min. The temperature of the spinning medium is 25° C., and the electrospinning is started under the electrostatic voltage of 10 kV, that is, continuous monofilaments of fibers are obtained.

[0034] The fiber mat obtained by electrospinning is washed with ethanol for post-treatment, washed 3-5 times, dried in a vacuum oven, and finally a fiber mat with a fiber diameter of about 10um is obtained.

[0035] The mixed liquid of the spinning medium and the solvent is subjected to vacu...

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PUM

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Abstract

The invention relates to a polymer superfine fibre wet electrostatic spinning method which comprises the steps as follows: polymer is dissolved in organic solvent to prepare uniform spinning solution with the weight percentage of 2-60 percent; an outlet of a spinneret is immersed in a spinning medium completely to ensure that fibre solidifying process is carried out in liquid spinning medium; a fibre collector can be arranged in the spinning medium or air medium; the temperature of the spinning medium is 0-65 DEG C; and the spinning solution is sprayed from a spinneret orifice immersed in the spinning medium under the static voltage of 1kV to 200kV to form jet current to be solidified and collected. The method improves the recovery ratio and the recycling ratio of solvent, is good for increasing the variety of spinnable polymer and developing the application range of superfine fibre by electrostatic spinning and has very wide industrialized application prospect.

Description

technical field [0001] The invention belongs to the field of electrospinning, and in particular relates to a method for wet electrospinning of polymer superfine fibers. Background technique [0002] Electrospinning is a process in which polymer melt or solution continuously generates ultrafine fibers with diameters ranging from nanometers to micrometers under the action of an external electric field. [0003] At present, the electrospinning method that has been published is mainly dry electrospinning. Its characteristics are: the solvents used in the preparation of the spinning solution are mostly volatile organic solvents, such as acetone, benzene, methylene chloride, DMF, DMAc, etc. During the spinning process, air is used as the spinning medium, and in a certain spinning Under a certain temperature, a certain static voltage and a certain spinning distance, the receiving plate or the rotating drum is used as the receiving device, and the high polymer is separated out thro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D1/02D01D10/06D01F6/84D01F2/28D01F6/18D01F2/00D01F13/00
CPCY02P70/62
Inventor 俞昊迟冰朱美芳朱树琦陈彦模
Owner DONGHUA UNIV
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