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Device and method for directly preparing hollow nanometer yarn in one step based on electrostatic spinning technology

An electrospinning technology, a hollow technology, is used in spinning machines, hollow filament manufacturing, filament/thread forming, etc. Improves fiber yield and avoids needle clogging

Inactive Publication Date: 2018-12-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Document 1 "Chinese Patent Application No. 200810018267.8" discloses an electrospinning nanofiber yarn system and a method for preparing nanofiber yarn. The system uses twisting rollers to twist nanofibers into yarns, and the yarns have Certain strength, but the system uses a spinneret for electrospinning, the spinning efficiency is low, and the output of fiber generation per unit time is low, and the spinning efficiency needs to be improved

Method used

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  • Device and method for directly preparing hollow nanometer yarn in one step based on electrostatic spinning technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Select polyvinyl alcohol (PVA, MW=72000) dissolved in distilled water 5wt% and nylon 6 (Nylon 6, Mw=35000) dissolved in formic acid 10wt% as spinning solution, placed on a magnetic stirrer and stirred at room temperature for 4 hours And 5 hours, the total volume of the solution is 200mL, the spinning solution is placed in the spinning solution tank, the high-voltage generating device is turned on, and the high-voltage static electricity is loaded at 5KV, the steel wire shaft rotates at a speed of 30r / min, and the droplets on the steel wire shaft are continuously formed And emit nanofibers, through the vortex twisting action of the water flow in the funnel, fiber bundles can be formed, and the rotating drum placed under the funnel collects the fiber yarns.

[0025] After testing, the prepared hollow fiber yarn has good orientation and high yield, and the average PVA removal rate of the core layer material is 80%.

Embodiment 2

[0027] Select polyvinyl alcohol (PVA, MW=72000) dissolved in distilled water 5wt% and nylon 6 (Nylon 6, Mw=35000) dissolved in formic acid 15wt% as spinning solution, placed on a magnetic stirrer and stirred at room temperature for 4 hours And 5 hours, the total volume of the solution is 200mL, the spinning solution is placed in the spinning solution tank, the high-voltage electric field is turned on, and the high-voltage static electricity is loaded at 5KV, the steel wire shaft rotates at a speed of 30r / min, and the steel wire shaft continuously emits nanofibers. The water flow in the funnel is twisted by the vortex, and the hollow fiber yarn is collected under the funnel.

[0028] After testing, the prepared hollow fiber yarn has good orientation and extremely high yield, and the average removal rate of PVA of the core layer material is 85%.

Embodiment 3

[0030] Select polyvinyl alcohol (PVA, MW=72000) dissolved in distilled water 5wt% and nylon 6 (Nylon 6, Mw=35000) dissolved in formic acid 20wt% as spinning solution, placed on a magnetic stirrer and stirred at room temperature for 4 hours And 5 hours, the total volume of the solution is 200mL, the spinning solution is placed in the spinning solution tank, the high-voltage generating device is turned on, and the high-voltage static electricity is loaded at 5KV, the steel wire shaft rotates at a speed of 30r / min, and the droplets on the steel wire shaft are continuously formed And emit nanofibers, through the vortex twisting action of the water flow in the funnel, fiber bundles can be formed, and the rotating drum placed under the funnel collects the fiber yarns.

[0031] After testing, the prepared hollow fiber yarn has good orientation and high yield, and the average PVA removal rate of the core layer material is 90%.

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Abstract

The invention relates to a device and method for directly preparing hollow nanometer yarn in one step based on the electrostatic spinning technology. The device is characterized in that a steel wire shaft is arranged on a spinning solution tank, and the shaft is connected with the motor and driven to rotate; a funnel is arranged on one side of the spinning solution tank 1 and located on the rotating radial path; the lower end of the funnel is provided with a collection roller and a water tank, a water pump is arranged on the water tank, and an outlet of the water pump is communicated with thefunnel. Under the action of a high-voltage electric field, each liquid drop can form a Taylor cone, jet flows are further formed, and finally, the jet flows are solidified at the receiving end to formfilaments. No needles are utilized in the needle-free electrostatic spinning process, when the intensity of the electric field exceeds a critical value, a lot of je flows are directly formed from anopen free surface, and the problem that a needle is blocked is avoided; the spinning efficiency and the fiber yield are greatly improved, and a feasible way is provided for electrostatic spinning industrialization.

Description

technical field [0001] The invention belongs to the field of electrospinning technology and materials, and relates to a device and method for directly preparing hollow nano-yarns based on the electrospinning technology in one step, to a needle-free electrospinning system, and specifically to direct mass production in one step Apparatus and method for hollow fiber yarns. Background technique [0002] Electrospinning is a special fiber manufacturing process in which a polymer solution is jet-spun in a strong electric field. Under the action of an electric field, the droplet at the needle will change from a spherical shape to a conical shape (that is, "Taylor cone"), and extend from the tip of the cone into a filament. After the filament travels in the air for a certain distance, it will finally solidify into a fiber at the negative electrode. . In this way, polymer filaments with nanometer to micrometer diameters can be produced. Electrospinning has become one of the main w...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01F1/08D01H1/08
CPCD01D5/0061D01F1/08D01H1/08
Inventor 叶雅静景卓元周雅青尹大川
Owner NORTHWESTERN POLYTECHNICAL UNIV
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