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Static spinning device and its industrial use

A technology of electrospinning and spinning device, which is used in textile and papermaking, filament/thread forming, fiber processing, etc. Effect

Inactive Publication Date: 2007-11-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the low mechanical properties of fibers currently obtained by electrospinning, they cannot meet the needs of various applications

Method used

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  • Static spinning device and its industrial use

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Spinning was carried out using the apparatus shown in Figure 1. Wherein: spinneret aperture is 1 μm; The length of coagulation bath 3 is 4m, and spinneret distance L is 10cm apart from coagulation bath liquid surface;

[0036] The concentrated sulfuric acid solution of polyhexamethylene terephthalamide with a mass concentration of 1wt% is sent into the spinneret that is provided with spinneret hole by metering pump, is extruded from spinneret hole, and the solution that is squeezed out is in Under the action of electrostatic force, a thin stream of solution is formed, and the thin stream of solution moves forward at a high speed. The volatilization of the solvent and the drafting of the thin stream lead to the solidification of the thin stream of solution and the reduction of its diameter. During this process an orientation behavior takes place for the polymer chains. After the solution trickle moves for a certain distance, it enters the coagulation bath. In the coagul...

Embodiment 2

[0045] Spinning was carried out using the apparatus shown in Figure 1. Wherein: spinneret aperture is 2mm; The length of coagulation bath 3 is 3m, and spinneret distance L is 30cm apart from coagulation bath liquid surface;

[0046] Be that the dimethylacetamide solution of the polym-phenylene isophthalamide that mass concentration is 20wt%, adopt the same method of embodiment 1 to carry out spinning;

[0047] Said coagulant is a specific gravity of 1.336 containing dimethylacetamide and CaCl 2 (calcium chloride) in water;

[0048] Spinning voltage: 40KV, solution discharge rate: 10ml / h, medium temperature around solution trickle: 80°C, solution trickle movement speed: 20m / s, coagulation bath temperature: 20°C, guide roller speed: 0.5m / s.

[0049] Adopt ASTM standard D 638 to detect the obtained fiber, the results are as follows:

[0050] Young's modulus 3 ~ 5MPa

[0051] Yield modulus 1 ~ 3MPa

[0052] Elongation at break: 300-500%

[0053] Breaking strength: 4~6MPa

Embodiment 3

[0055] Adopt the method identical with embodiment 1, wherein: solution is the dimethylacetamide+2~5% LiCl solution of polyparabenilamide, and said coagulating agent is that specific gravity is 1.238 containing dimethylacetamide and LiCl ( Lithium chloride) aqueous solution adopts ASTM standard D 638 to detect the fiber obtained, and the results are as follows:

[0056] Young's modulus 3 ~ 5MPa

[0057] Yield modulus 1 ~ 3MPa

[0058] Elongation at break: 300-500%

[0059] Breaking strength: 4 ~ 6Mpa

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Abstract

The present invention provides electrostatic spinning apparatus and its industrial application. The apparatus includes polymer solution conveying machine, spinning nozzle device connected to the outlet of the polymer solution conveying machine, spinning bath below the spinning nozzle device, fiber turning guide roller set inside the spinning bath and electrodes set on the spinning nozzle device and the spinning bath. The apparatus of the present invention is used in spinning polymer, and has greatly raised wet spinning speed, great fiber drafting magnification, well oriented fiber molecule chain, compact fiber structure, greatly raised mechanical performance of fiber, wide solvent selecting range, simplified electrostatic spinning equipment, raised solvent recovering rate and less environmental pollution caused by the solvent.

Description

technical field [0001] The invention relates to a spinning device, in particular to an electrostatic spinning device and its industrial application. Background technique [0002] Electrospinning is the use of air or an inert gas to dry the solvent in a thin stream of solution to produce solid fibers. Therefore, it is of great significance to recover all the solvents as much as possible from the perspective of economy and ecology. Electrospinning uses more solvent than dry and wet spinning, which is about 5 to 10 times that of fiber raw materials. During the spinning process, a large amount of solvent is lost. Therefore, electrospinning equipment must be equipped with huge condensation and absorption facilities. The advantage of electrospinning is that fibers with diameters ranging from several nanometers to tens of microns can be prepared. In the process of electrospinning, the thin stream of solution is drawn by a large multiple, so that the obtained fiber has a certain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00
CPCD01D5/0046
Inventor 陈彦模朱美芳张瑜左伟伟俞昊
Owner DONGHUA UNIV
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