High-speed air-blowing static spinning composite preparation method and device for ultra-fine polymer fibre

An electrospinning and ultrafine fiber technology, which is applied in fiber processing, textile and papermaking, filament/thread forming, etc. The effect of uniform diameter and easy operation

Inactive Publication Date: 2008-02-20
JIANGXI NORMAL UNIV
View PDF0 Cites 51 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way of preparing ultrafine fibers, the output of a single nozzle (or single needle) is less than 0.5 grams per hour (lower at low concentrations), and such a low yield greatly limits the industrialization of electrospun ultrafine fibers.

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
  • High-speed air-blowing static spinning composite preparation method and device for ultra-fine polymer fibre
  • High-speed air-blowing static spinning composite preparation method and device for ultra-fine polymer fibre

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Example 1: A device for composite preparation of ultrafine polymer fibers by high-speed air-blowing electrospinning includes: nozzles, high-voltage power supplies, metal needles, and nozzle jackets are tapered tubes, and the middle part of the nozzles is provided with polymer solution nozzles 4, There is a metal needle 7 in the center of the nozzle 4, and the tail of the metal needle 7 is connected to the high-voltage power supply 2. There is an air uniform valve 6 between the nozzle 4 and the nozzle casing. The side wall of the nozzle casing is provided with a high-pressure air outlet 3 and a high-pressure air outlet 3 It is connected with the uniform gas valve and nozzle 4. The pipe wall between the jackets of the device prepared by high-speed air-blowing electrospinning of ultrafine polymer fibers separates the air flow and the polymer solution. A constant pressure is applied to the polymer solution, and the polymer solution flows out from the nozzle inner tube polym...

example 2

[0018] The preparation method of example 2 polyacrylonitrile (PAN) spinning solution

[0019] Weigh 10g of PAN with an intrinsic viscosity of 2.3dl / g, add 90g N'N-dimethylacetamide (DMAc), control the solution mass concentration to be about 10%, add about 0.2% cetyltrimethyl Ammonium bromide (DEMAB) was used to increase the conductivity of the solution, and stirred at 100°C for 2 hours to form a uniform and transparent solution. The electric field strength of spinning is 50kV / m, the gas flow rate is 10L / min, the gas flow rate of the spinneret is 204m / s, the solution consumption (single nozzle) is 0.3ml / min, and the diameter of the nanofiber is 800-1500nm. The SEM photo of PAN nanofibers is shown in Figure 2.

example 3

[0020] The preparation method of example 3 polyamic acid (PAA) spinning solution

[0021] Take 50 g of the original PAA / DMAc solution with a synthetic concentration of about 15% and an intrinsic viscosity of 2.02dl / g, add 5 g of tetrahydrofuran (THF) to dilute to a total mass concentration of the solution of about 12%, and add about 0.2% of organic salt DEMAB was stirred at 0°C for 2 hours to form a uniform and transparent solution. The electric field strength of spinning is 60KV / m, the gas flow rate is 20L / min, the gas flow rate of the spinneret is 408m / s, the solution consumption (of a single nozzle) is 0.25ml / min, and the diameter of the nanofiber is 390-700nm. The SEM photo of PAA nanofibers is shown in Figure 3.

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
strengthaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a compound preparing method and device for the super thin polymer fiber high speed airflow static filature. The invention is to enhance the static filature speed through the high speed airflow. The invention separates the airflow passage form the solution passage through the sleeve pipe; the central capillary is the passage for the polymer solution and the outer pipe is the airflow passage. The polymer solution will shoot up from the liquid drop. The high speed airflow from the outer sleeve pipe produces the siphon effect to the polymer solution in the central capillary to overcome the surface tension of the liquid drop and speed the shooting out of the solution shooting flow in one hand; in the other hand the high speed airflow speeds up the volatilization of the solvent and the moving speed shooting to the other polar. The speed of the filature of the invention is ten times higher than the single static filature, moreover the formed nanometer fiber has a smooth surface and the diameter size and distribution is similar to the diameter of the single static filature.

Description

[0001] Field: [0002] The invention belongs to a composite processing technology of high-speed air blowing electrostatic spinning. In the present invention, the charged fluid at the tip is simultaneously acted on by the high-speed airflow and the high-voltage electric field, so that it rapidly forms a charged jet and shoots to the other pole of the electric field. Under the synergy of the driving force of the electric field and the high-speed moving airflow, the charged jet moves rapidly to the nanofiber collector (the other pole of the electric field), the solvent evaporates rapidly, the diameter of the jet decreases rapidly, and the jet finally solidifies to form nanofibers with uniform diameter. Background technique: [0003] Electrospinning technology is a kind of charged polymer solution or melt to generate fine jets in an electrostatic field. During the rapid movement of this jet from one pole to another, the solvent volatilizes and the solute solidifies or the melt coo...

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 Applications(China)
IPC IPC(8): D01D5/00
Inventor 侯豪情陈水亮程楚云胡萍
Owner JIANGXI NORMAL 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