Method for preparing nano fiber endless tow

A nanofiber, filament bundle technology, applied in fiber processing, filament/thread forming, textile and papermaking, etc., can solve the problems of loss, fiber scattering, low efficiency, etc., to avoid scattering and loss, improve production efficiency, Simple to use effects

Inactive Publication Date: 2007-08-29
SOUTHEAST UNIV
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since the size of electrospun fibers is at the nanometer or submicron level, there are often cases of fiber loss, and during the electrospinning process, because the polymers carry the same charge and repel each other, the fibers scatter around and it is not easy to make long Nanofiber bundles or filaments
[0006] Some people use a grounded metal receiver in electrospinning to accept nanofibers produced by a nozzle and process them into nanofiber filaments. This method is inefficient
[0007] Some people use a multi-nozzle system during electrospinning. The nanofibers of the same charge produced by the multi-nozzles must first be in contact with a clean grounded metal receptor to dissipate the charge and then gather to form filaments. However, the nanofibers of the same charge produced by the multi-nozzles Mutual repulsion before reaching the metal receiver, the fibers fly apart, resulting in loss

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing nano fiber endless tow

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] A method for preparing nano-fiber filament bundles adopts a spinning box body, two rows of electrospinning nozzles with opposite nozzles are placed in parallel at the same height at the top of the spinning box body, and several groups of godet rollers are arranged in the middle of the spinning box body Yes, the distance between the godet roller pair and the electrospinning nozzles of the two rows of nozzles is equal. The specific preparation steps of a nanofiber filament bundle are as follows: (1) The high polymer solution is delivered to the electrospinning nozzle in the spinning box of the nanofiber filament bundle; (2) The electrospinning nozzles of the two rows of nozzles are opposite. Apply DC high voltages of opposite polarity 10KV-100KV: (3) The polymer solution at the top of the electrospinning nozzle stretches and whips to form charged nanofibers under the action of the electric field force, and the electrospinning nozzles with opposite nozzles spray The produced n...

Embodiment 1

[0024] 100g of polyacrylonitrile PAN is dissolved in 1000ml of N,N-dimethylformamide, and the high polymer solution is delivered to two rows of 100 electrospinning nozzles in each of the nanofiber filament bundle spinning boxes. The distance between the rows of electrospinning nozzles in the spinning box is 5 cm, and the distance between the electrospinning nozzles of the two rows of nozzles is 10 cm. The electrospinning nozzles of the two rows of nozzles facing each other are respectively applied with a DC high voltage of ±20kv of opposite polarity, and the inner diameter of the electrospinning nozzle is 0.5mm. The godet roller draws the filament bundle at a speed of 3cm / s. The nanofibers ejected from the top of the electro-spinning nozzle are drawn by the godet roller to form filament bundles and are exported and collected.

Embodiment 2

[0026] 100g of poly-L-lactic acid PLLA (viscosity average molecular weight 100,000) is dissolved in a mixed solvent of 500ml acetone and 500ml N, N-dimethylformamide, and the polymer solution is delivered to the spinning box of nanofiber filament bundles There are 100 electrospinning nozzles in each of the two rows. The distance between the nozzles in each row of electrospinning nozzles is 30cm, and the distance between the electrospinning nozzles of the two rows of nozzles is 50cm. The electrospinning nozzles of the two rows of nozzles opposite to each other are respectively applied with a DC high voltage of ±10kv of opposite polarity, and the inner diameter of the electrospinning nozzle is 0.2mm. The godet roller draws the filament bundle at a speed of 6cm / s. The nanofibers ejected from the top of the electro-spinning nozzle are drawn by the godet roller to form filament bundles and are exported and collected.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The production method of filament of nanofibers is a simply and high efficiency way. It adopts spinning trunk (3). There are two lines of nozzles (1) whose spout are opposite at the height of the top of the trunk. There are several group of pare of thread guide roller (2) in the trunk.. The distance between thread guide roller and nozzles are equal. The material process is: 1) Transport high polymer solution to nozzles in the trunk of filament of nanofibers; 2) Bring high-voltage DC of opposite polarity to bear to the nozzles. 3) High polymer solution at the top of the nozzles is stretched and whipping responded to form nanofibers which contain electric charge. The opposite nozzle spray nanofibers contains contrary electric charge. They are allure and collide in the air and form nanofibers. The nanofibers are stretched and towed by nozzle and filament of nanofibers comes into being. The operation is simple, highly effective and has no losing of nanofibers.

Description

Technical field [0001] The invention relates to a method for preparing nano fiber filament bundles, and belongs to the technical field of special fiber preparation. Background technique [0002] Since the birth of the world's first chemical fiber-nitrocellulose in 1883, the research and exploration of synthetic fibers have been developed rapidly, and correspondingly, various spinning methods have also emerged. The most commonly used spinning methods now include melt spinning, dry spinning and wet spinning, and others such as phase separation spinning, flash spinning, electrostatic spinning, liquid crystal spinning, reaction spinning, etc. The methods are all newly developed special spinning methods. [0003] Electrospinning has been recognized as a simple and efficient fiber membrane preparation technology. The diameter of electrospun fiber is 100-1000 times smaller than that obtained by ordinary spinning method, and it has a huge specific surface area. It can not only be used as...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00
Inventor 李新松姚琛宋唐英
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap