Method and device for producing polymer nanofibers with high-speed airflow and high-voltage static electricity

A high-voltage electrostatic and nanofiber technology, which is used in fiber processing, stretch spinning, textiles and papermaking, etc., can solve problems such as the lack of high-pressure airflow guide, the low spinning efficiency, and the low liquid conductivity. , to achieve the effect of low residual solvent content, uniform thickness and increased flow speed

Active Publication Date: 2017-02-22
JIANGXI ADVANCED NANOFIBER S&T CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a large space between the capillaries, and the high-pressure airflow diversion effect is not exerted, that is, the actual liquid conduction volume is low; on the other hand, the flow resistance of the polymer solution in the capillary is large, and the effective diversion area is much lower than the apparent diversion area. As a result, the spinning efficiency is not too high

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 and device for producing polymer nanofibers with high-speed airflow and high-voltage static electricity
  • Method and device for producing polymer nanofibers with high-speed airflow and high-voltage static electricity
  • Method and device for producing polymer nanofibers with high-speed airflow and high-voltage static electricity

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] Example 1: Preparation of polyacrylonitrile (PAN) nanofibers

[0035] PAN powder is dissolved in N,N-dimethylacetamide (DMAc) solution, and a small amount of conductive agent N,N,N-trimethyl-4-dodecylphenylammonium chloride is added to prepare PAN quality A spinning solution with a percentage concentration of 12%, an absolute viscosity of 4.2 Pa.S, and an electrical conductivity of 50 μS / cm is ready for use. Adjust the air pressure parameters of the spinneret so that the air pressure of the inner air flow channel 1 is 0.7 MPa, the air air pressure of the outer air flow channel 3 is 0.6 MPa, the width "a" of the air outlet gap of the outer air flow channel 3 is 1.5 mm, and the air pressure of the inner air flow channel 3 is 1.5 mm. The air outlet aperture "c" of layer air flow channel 1 is 0.5mm, the height difference "d" of the air outlet of the inner and outer layer air flow channel is 3.0mm, and the width "b" of the spinning solution outlet gap is 0.2mm; from the spin...

example 2

[0036] Example 2: Preparation of polyamic acid (PAA) ultrafine nanofibers

[0037] Take 50 g of DMAc solution of polyamic acid (PAA) with a mass concentration of 20% and an intrinsic viscosity of 1.2 dL / g, dilute with 12.5 g of tetrahydrofuran (THF), and add a small amount of conductive agent N, N, N-trimethyl- 4-dodecylphenylammonium chloride, making the spinning solution with a mass concentration of PAA of 16%, an absolute viscosity of 4.0 Pa.S, and an electrical conductivity of 65 μS / cm for use. Adjust the air pressure parameters of the spinneret so that the air pressure of the inner air flow channel 1 is 1.0 MPa, the air air pressure of the outer air flow channel 3 is 0.8 MPa, the width "a" of the air outlet gap of the outer air flow channel 3 is 0.8 mm, and the air pressure of the inner air flow channel 3 is 0.8 mm. The air outlet hole diameter "c" of layer air flow channel 1 is 1.0mm, the height difference "d" of the air outlet of the inner and outer air flow channel is ...

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

PropertyMeasurementUnit
widthaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a method and device for producing polymer nano fibers through high-speed airflow and high-voltage static. According to the method, the high-voltage static acts on a polymer solution in a silk spraying opening, under the wrapping and surrounding of the high-speed airflow of the inner layer and the high-speed airflow of the outer layer and in the condition that the airflow pressure of the outer layer is lower than the airflow pressure of the inner layer, the polymer solution is conveyed through a siphon and is drafted at a high speed to rapidly form liquid jet, and the polymer is condensed and rapidly forms the nano fibers. The device is characterized in that a silk spraying head is arranged to be in the mode that an inner-layer airflow channel and an outer-layer airflow channel wrap and surround a slot interlayer solution channel from the center to the outer side, the polymer solution under the high-voltage static action is surrounded and wrapped through the high-speed airflow of the inner layer and the high-speed airflow of the outer layer, due to the fast siphon conveying and high-speed drafting action on the electrified polymer solution through the high-speed airflow layers and the electric drafting action of the high-voltage static on the electrified polymer solution, the single-speed high-voltage electrospinning speed of the nano fibers manufactured through the method and the device can be improved by 100 times or more, the obtained fibers are uniform in thickness, the content of a residual solvent is low, and aftertreatment of the nano fibers is better facilitated.

Description

technical field [0001] The invention relates to an inner and outer double-layer high-speed air flow encircling a polymer solution, supplemented by high-voltage electrostatic action to realize rapid preparation of nanofibers, and in particular provides a method and device for producing polymer nanofibers with high-speed air flow and high-voltage static electricity. Background technique [0002] Polymer nanofibers and their composites are widely used in filtration, fire protection, medical treatment and military protection. Electrospinning technology is a processing method widely used to prepare polymer nanofibers from polymer solutions or melts through high-voltage electrostatic action. The low output of traditional electrospinning is the bottleneck restricting the industrialization of this polymer nanofiber. How to increase the output of nanofiber is a big problem to be solved urgently. Studies have found that high-speed airflow can be used to increase the speed of preparin...

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): D01D5/00D01D5/14
CPCD01D5/0038D01D5/0061D01D5/0069
Inventor 侯豪情程楚云
Owner JIANGXI ADVANCED NANOFIBER S&T CO LTD
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