Continuous preparation method for ultra-fine electrostatic spinning fibre yarn

An electrospinning and electrospinning technology is applied in the field of preparation of nanofibers, which can solve the problems of difficult to obtain highly oriented fibers and fiber bundles, and difficult to continuously obtain single nanofibers or uniaxial fiber bundles, etc., to broaden the application field. Effect

Active Publication Date: 2008-01-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, it is difficult to continuously obtain single nanofibers or uniaxial fiber bundles by the above-mentioned methods, so it is difficult to obtain highly oriented fibers and fiber bundles

Method used

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  • Continuous preparation method for ultra-fine electrostatic spinning fibre yarn
  • Continuous preparation method for ultra-fine electrostatic spinning fibre yarn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Dissolve 1.0 g of purified 3-hydroxybutyric acid and 3-hydroxyvaleric acid copolyester (PHBV) in 99 g (88 / 11) of chloroform / alcohol mixed solvent to obtain a transparent and uniform product with a mass fraction of 1 wt%. The solution;

[0029] (2) Benzyltriethylammonium chloride with a mass fraction of 0.3wt% is added in the solution to improve the spinning properties of the solution;

[0030] (3) Perform electrospinning with the prepared electrospinning dope. The spinning parameters are controlled at a voltage of 10kV, a nozzle aperture of 0.4mm, a solution flow rate of 1ml / h, an ambient temperature of 30°C, a relative air humidity of 65%, and a winding speed of 230r / min;

[0031] (4) Use the grounding needle tip to approach the nozzle to induce bundles of the electrospun fibers;

[0032] (5) Drag the bundled fiber bundle backwards through the twisting device for twisting;

[0033] (6) Winding the twisted continuous yarn on the bobbin through the winding device....

Embodiment 2

[0036] (1) Dissolving 10 g of purified PAN in N, N-dimethylformamide (DMF) (90 g) to obtain a transparent and uniform solution with a mass fraction of 10 wt % PAN;

[0037] (2) Benzyltriethylammonium chloride with a mass fraction of 0.3wt% is added in the solution to improve the spinning properties of the solution;

[0038] (3) Perform electrospinning with the prepared electrospinning dope. The spinning parameters are controlled at a voltage of 9kV, a nozzle aperture of 0.05mm, a solution flow rate of 1.5ml / h, an ambient temperature of 50°C, a relative air humidity of 50%, and a winding speed of 300r / min;

[0039] (4) Use the grounding needle tip to approach the nozzle to induce bundles of the electrospun fibers;

[0040] (5) Drag the bundled fiber bundle backwards through the twisting device for twisting;

[0041] (6) Winding the twisted continuous yarn on the bobbin through the winding device.

[0042] Figure 2 is a general photo of PAN electrospun fiber yarn, and Figure 3 ...

Embodiment 3

[0044] (1) 12 g of purified polylactic acid (PLA) was dissolved in 88 g (50 / 33) of dichloromethane / DMF mixed solvent to obtain a transparent and uniform solution with a mass fraction of 12 wt %;

[0045] (2) the sodium chloride that mass fraction is 0.5wt% is added in the solution, to improve the spinning characteristic of solution;

[0046] (3) Perform electrospinning with the prepared electrospinning dope. The spinning parameters were controlled at a voltage of 17kV, a nozzle aperture of 0.8mm, a solution flow rate of 3.6ml / h, an ambient temperature of 25°C, a relative air humidity of 70%, and a winding speed of 180r / min.

[0047] (4) Use the grounding needle tip to approach the nozzle to induce bundles of the electrospun fibers;

[0048] (5) Drag the bundled fiber bundle backwards through the twisting device for twisting;

[0049] (6) Winding the twisted continuous yarn on the bobbin through the winding device.

[0050] Figure 4 is a scanning electron micrograph of the p...

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Abstract

The invention relates to a continuous preparation method of superfine electrostatic-spinning fiber yarn, which comprises the following steps: (1) dissolving a polymer in a solvent to obtain a homogenous solution; (2) adding additives into the solution; (3) electrostatic spinning: feeding the spinning stock solution into a container, and extruding from a nozzle connected with a high-voltage anode under the control of a microinjection pump while controlling various electrostatic spinning parameters to keep a stable spinning state; (4) approaching a grounded needle tip to the nozzle to induce the electrostatic-spinning fibers to form bundles; (5) dragging the fiber bundles and twisting by a twisting machine; and (6) winding the twisted continuous yarns around a barrel by using a winding machine. The superfine electrostatic-spinning fiber yarn produced by the inventive method has wide application range.

Description

technical field [0001] The invention belongs to the field of nanofiber preparation, and in particular relates to a continuous preparation method of ultrafine electrostatic spinning fiber yarn. Background technique [0002] Electrospinning technology is an extremely convenient method to prepare ultrafine fibers. The fiber diameters that can be prepared by electrospinning range from tens of nanometers to several microns. Due to its nanoscale one-dimensional morphology and extremely high specific surface area, this ultrafine fiber will exhibit amazing properties in different fields and has great application prospects. At present, most electrospun fibers are obtained in the form of non-woven fabrics, which limits the application of electrospun fibers in a wider field. Most of them can only be used for filtration, tissue engineering scaffolds, graft coatings and wound repair. When we use the viewpoint of traditional fiber and textile industry to understand nanofibers, only when...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02G3/02D01D1/02D01D5/00D01D7/00D01F6/18D01F6/14D01F6/04D01F6/70D01F6/60D01F6/62
Inventor 朱美芳王雪芬张锴俞昊周哲陈彦模
Owner DONGHUA UNIV
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