Gas layer propulsion electrostatic spinning apparatus and industrial application thereof

A technology of electrospinning and propulsion device, applied in dry spinning, monocomponent polyester rayon, monocomponent polyamide rayon, etc., can solve the problems of environmental pollution, restricting the application of electrospinning method, etc.

Inactive Publication Date: 2007-09-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These requirements greatly limit the application of electrospinning method, and

Method used

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  • Gas layer propulsion electrostatic spinning apparatus and industrial application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Spinning was carried out using the apparatus shown in Figure 1. in:

[0036] Said gas circulation propulsion device 1 is a gas compressor, and the spinneret 6 is such as Electrospinning of Nanofibers: Reinventing the Wheel? , Dan Li, Younan Xia, 2004, 16, No.14, 1151-1170, the technology reported in the Advanced Materials literature, the gas drying and heating device 2 is a shell and tube heat exchanger.

[0037] The spinning conditions are: the diameter of the spinneret hole is 1 μm; the height of the airtight chamber is 1 m; the number of spinnerets is 10; the spinning stock solution is ejected from the spinneret at a flow rate of 2ml / h (single hole), and the air temperature is The temperature is 60°C; the applied voltage is 15KV; the gas is air, the pressure is 0.35Mpa; the airflow velocity is 0.5m / s;

[0038] The spinning process is: the weight concentration is 15wt% polym-phenylene isophthalamide and 2wt% CaCl 2 The N, N-dimethylformamide solution is injected in...

Embodiment 2

[0041] Spinning was carried out using the apparatus shown in Figure 1. Wherein: the spinning condition is: the spinneret aperture is 100 μm; the height of the airtight chamber is 1m; the number of spinnerets is 15; the spinning dope is ejected from the spinnerets at a flow rate of 0.15ml / h, and the air temperature is 70°C; the applied voltage is 20KV; the gas is air, the pressure is 0.8Mpa; the airflow velocity is 1.2m / s; the others are the same as in Example 1.

[0042] The spinning process is as follows: the N,N-dimethylacetamide solution of polym-phenylene isophthalamide with a weight concentration of 12wt% and 3wt% LiCl is injected into the material chamber, and the heated and dried airflow is used to push the solution It is uniformly and stably extruded from each spinneret, and the extruded solution forms a thin stream of solution under the action of electrostatic force, and the thin stream of solution moves forward at high speed. The stream finally solidifies into fiber...

Embodiment 3

[0045] Spinning was carried out using the apparatus shown in Figure 1. Wherein: the spinning conditions are: the spinneret hole diameter is 250 μm; the height of the airtight chamber is 0.8m; the number of spinnerets is 10; Out, the pressure is 0.4Mpa, the air temperature is 60°C; the air flow velocity is 0.8m / s; the applied voltage is 12KV; others are the same as in Example 1.

[0046] The spinning process is: the weight concentration is 15wt% polyparabenamide and 2wt% LiCl N,N-dimethylacetamide solution is injected into the material chamber, pushed by heated and dried air flow, and the solution is drawn from each spinneret Uniform and stable extrusion, the extruded solution forms a solution stream under the action of electrostatic force, and the solution stream moves forward at high speed. With the volatilization of the solvent and the drafting of the electrostatic force, the solution stream finally solidifies into fibers. Collected on the material receiving device in the l...

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Abstract

This invention relates to a static filature device pushed by a gas layer and its industrial application, in which, the device includes: a gas circulation push device, a gas drying and heating device, a sealed filaturing room, and air inlet at the top of the sealed room, a material room at the upper part of the sealed room, a spinneret at the lower part of the material room, electrode connected on the spinneret, a material receiving device at the lower part of the sealed room, an air outlet at the lower-right part of the room, a cooling device cooling gas flow with solvent and a solvent recovering device, which can make static filature to molding to polymers, increases spinning efficiency greatly by applying multiple sprayers, controls the temperature and humid of the entry flows to alter the temperature and humid of filature raw liquid, and further more, the pushed gas flow can drive the volatiled solvent in the process to flow out to be recovered.

Description

technical field [0001] The invention relates to an electrostatic spinning device and its industrial application. Background technique [0002] Electrospinning uses mechanical force to push the polymer solution out of the spinneret. Under the electrostatic force, the thin stream is stretched, the solvent is volatilized, and then solidified to form the fiber. Fibers made by this method have the advantage of small diameters, usually ranging from a few nanometers to tens of microns. [0003] The traditional electrospinning method is carried out at room temperature in an open manner. The temperature of the spinning stock solution is not adjusted, and the concentration is generally not high. The amount of solvent required is larger than that of dry spinning and wet spinning, usually 5 to 10 times that of the fiber raw material. During the spinning process, the solvent is directly volatilized into the environment, resulting in solvent loss and environmental pollution. Its specifi...

Claims

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Application Information

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IPC IPC(8): D01D5/04D01F6/60D01F6/62D01F2/28
Inventor 俞昊陈彦模周哲张瑜杨文戴天贺
Owner DONGHUA UNIV
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