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Electrostatic spinning nano-fibre yarn system and preparation of nano-fiber yarn

A nanofiber and electrospinning technology, applied in spinning machines, fiber treatment, fiber chemical characteristics, etc., can solve the problems that the fibers cannot be well oriented and cannot obtain stable and continuous nanofiber yarns, and achieve the goal of optimizing the process method Effect

Inactive Publication Date: 2008-11-12
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method has the problem that stable and continuous nanofiber yarns cannot be obtained, and the fibers cannot be well oriented.

Method used

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  • Electrostatic spinning nano-fibre yarn system and preparation of nano-fiber yarn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Polyacrylonitrile (PAN) (Mw=70,000 g / mol) was dissolved in solvent N,N-dimethylformamide (DMF) to prepare a spinning solution with a concentration of 13 wt%. Inject the spinning solution into the injector 2 of the electrospinning nanofiber yarn system, and in an environment with room temperature and a relative humidity of 40%, turn on the DC high voltage generator 1 of the above system, control the voltage at 20kV, and the electrospinning jet flows in a spiral Shaped motion tracks are deposited on the surface of the copper film 5 in an orderly manner. The receiving distance between the injector 2 and the copper film 5 is 70 mm. After the fibers are deposited for a period of time, the obtained ring-shaped nanofiber bundles are cut off by a cutter 16, and the copper film is rotated at the same time. The film 5, take-up roll 11 and lead wire recovery roll 12 pass through a wire that is pre-placed on the copper film 5, bypasses the godet roll 7, passes through the twisting d...

Embodiment 2

[0055] Dissolve polyvinyl alcohol (PVA) 1788 powder in distilled water at 70° C. to prepare a spinning solution with a concentration of 16 wt%. Inject the spinning solution into the syringe 2 of the electrospinning nanofiber yarn system. In an environment with room temperature and a relative humidity of 55%, turn on the DC high-voltage generator 1 of the above system, and control the voltage to 30kV. The electrospinning jet flows in a spiral Shaped motion tracks are deposited on the surface of the copper film 5 in an orderly manner. The receiving distance between the injector 2 and the copper film 5 is 110 mm. After the fibers are deposited for a period of time, the obtained ring-shaped nanofiber bundles are cut off with a cutter 16, and the copper film is rotated at the same time. The film 5, take-up roll 11 and lead wire recovery roll 12 pass through a wire that is pre-placed on the copper film 5, bypasses the godet roll 7, passes through the twisting device, the take-up roll...

Embodiment 3

[0057] Polyethylene oxide (PEO) (Mw=3×105 g / mol) was dissolved in 70° C. distilled water to prepare a spinning solution with a concentration of 10 wt%. Inject the spinning solution into the syringe 2 of the electrospinning nanofiber yarn system, and in an environment with room temperature and a relative humidity of 70%, turn on the DC high-voltage generator 1 of the above system, control the voltage at 40kV, and the electrospinning jet flows in a spiral Shaped motion tracks are deposited on the surface of copper film 5 in an orderly manner. The receiving distance between injector 2 and copper film 5 is 150 mm. After the fibers are deposited for a period of time, the obtained ring-shaped nanofiber bundles are cut off by cutter 16, and the copper film is rotated at the same time. The film 5, take-up roll 11 and lead wire recovery roll 12 pass through a wire that is pre-placed on the copper film 5, bypasses the godet roll 7, passes through the twisting device, the take-up roll 11,...

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Abstract

The invention discloses a static spinning nano-fiber yarn system and a preparation method for the nano-fiber yarn. The invention comprises a rotation axis which is provided with a disc grooved along the radius, a sliding block and a cutter groove, wherein, the upper surface of the disc is provided with an annular copper film which has a radial notch corresponding to the groove of the disc; the upper part of the disc is provided with a syringe, the outlet of which is provided with a metal syringe needle connected with the positive pole of a direct-current high voltage generator. One end of the cutter groove goes through the disc groove to contact with both sides of the radial notch of the copper film and be connected with the negative pole of the direct-current high voltage generator; a cutter with one free end is arranged in the cutter groove, wherein, the free end extends above the disc through the disc groove and moves along the groove. The sliding block slides axially along the rotation axis. Furthermore, the outer side of the disc is provided with a silk guide roller, a twister, a winding roller and a lead recovery roller. The spinning solution is made into nano-fiber yarn by the system. The yarn prepared by the invention has relatively higher strength, thus being prospective to provide the static spinning fiber products with a wider application field.

Description

technical field [0001] The invention belongs to the technical field of textile machinery, and relates to an electrostatic spinning system, in particular to an electrostatic spinning nanofiber yarn system, and also relates to a method for preparing nanofiber yarn by using the system. Background technique [0002] Electrospinning is a technology for obtaining nanofibers under high electric field. The raw materials used in this technology can be solutions, melts or polymers, or inorganic substances such as metals or ceramics with polymers as carriers; it can be pure Polymers, polymer alloys, etc. may also be used. [0003] The electrospinning jet is affected by factors such as whipping, varicoseness, and splitting in the electric field. The typical electrospinning jet is deposited on the collection screen in a spiral motion state, and a non-woven fabric mat with randomly arranged fibers is obtained. In order to expand the application field of electrospinning, it is necessary t...

Claims

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Application Information

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IPC IPC(8): D02G3/02D01H1/00D01D5/00D01F6/18D01F6/14D01F6/66
Inventor 孙润军刘呈坤来侃王耀武孙垂卿
Owner XI'AN POLYTECHNIC UNIVERSITY
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