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A kind of method and device for preparing nanofibers by air-blown parallel and surrounding steel wire electrospinning

An electrospinning and nanofiber technology is applied in the field of large-scale production of polymer nanofiber non-woven fabrics, which can solve problems such as being unsuitable for large-scale production of polymer nanofiber non-woven fabrics, and avoid secondary dissolution and film formation. , The effect of reducing solvent content and improving quality

Active Publication Date: 2016-06-15
JIANGXI ADVANCED NANOFIBER S&T CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the electrospinning equipment currently on the market is a small spinning unit, or a large nanofiber manufacturing equipment that quickly removes the nanofibers on the collector from the environment near the spinneret, and these equipment are not suitable for use. Large-Scale Manufacturing of Polymer Nanofiber Nonwovens

Method used

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  • A kind of method and device for preparing nanofibers by air-blown parallel and surrounding steel wire electrospinning
  • A kind of method and device for preparing nanofibers by air-blown parallel and surrounding steel wire electrospinning

Examples

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Effect test

example 1

[0038] Example 1: Preparation of polyamic acid (PAA) nanofiber nonwoven fabric

[0039] Take 5000g of PAA solution with a mass concentration of 20% and an intrinsic viscosity of 1.2dl / g from synthesis, add 560g of N,N-dimethylformamide to dilute to make the solution mass concentration 15%, and add 0.2% trimethylformamide Dodecyl ammonium chloride, mechanically stirred at 0°C for 2 hours to form a uniform and transparent solution, filtered through a 500-mesh nylon filter for use.

[0040] according to figure 1 As shown, the spinning equipment is assembled horizontally; the receiver is grounded in continuous receiving mode. The steel wire is a steel wire bundle formed by twisting double strands of steel wire. Set the running speed of thin steel wire to 2m / min, adjust the blowing pressure to 0.2MPa, and the flow rate to 3m 3 / min, the jet hole diameter is 2.5mm. The flow rate of material supply is 80ml / min, and the pressure is 0.1MPa. Adjust the height "a" of the nozzle of t...

example 2

[0041] Example 2: Preparation of polyacrylonitrile (PAN) nanofiber nonwoven

[0042] Get commercial PAN powder (intrinsic viscosity is 2.4dl / g) powder 500g, add 4500gN,N-dimethylformamide to dissolve, make the mass concentration of solution be 10%, and add 0.2% trimethyl dodecyl chloride ammonium chloride, mechanically stirred at 20°C for 1 hr to form a homogeneous transparent solution, filtered through a 500-mesh nylon filter for use.

[0043] according to figure 1 As shown, the spinning equipment is assembled horizontally; the receiver is grounded in continuous receiving mode. The steel wire is a steel wire bundle formed by twisting double strands of steel wire. Set the running speed of the steel wire to 2m / min, adjust the blowing pressure to 0.2MPa, and the flow rate to 3m 3 / min, the jet hole diameter is 2.5mm. The flow rate of material supply is 80ml / min, and the pressure is 0.1MPa. Adjust the height "a" of the nozzle of the material supply branch pipe in the soaking...

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Abstract

The invention discloses a method and device for manufacturing nano fibers in an air-blowing parallel surrounding steel wire electrostatic spinning mode. In a high-voltage electrostatic field, a steel wire continuously operates in a surrounding mode, the multi-section closed type continuous liquid supply is adopted, high-voltage electric static acts on the thin steel wire, a thin layer spinning solution on the thin steel wire generates the dense nano fiber jet flow, the jet flow moves towards the other electrode at high speed, high-speed air-blowing drying assists in enabling a polymer solution to form the nano fibers in an electric spinning mode, nano fiber non-woven fabric of certain thickness is manufactured continuously in a large-scale mode, it is avoided that the formed nano fibers is secondarily dissolved to be films in high-density solution steam, and the quality of the polymer nano fiber non-woven fabric is improved effectively. The device can be adopted by general soluble macromolecules to manufacture the nano fibers.

Description

technical field [0001] The invention provides a method and device for large-scale preparation of polymer nanofiber non-woven fabrics, in particular a method and device for preparing nanofibers by electrospinning air-blown parallel surrounding steel wires. Background technique [0002] As we all know, during the production of electrospun polymer nanofibers, a large amount of solvent vapor is generated and distributed in the surrounding environment of the nanofiber collector. Dissolving, as a result, destroys the structure of the fibers or the texture of the nonwoven. Especially in large-scale production, the amount of solvent vapor generated is very large, and the density of solvent vapor in the environment where the generated nanofibers are located is very high. If the nanofibers formed on the collector cannot be quickly removed in time, the nanofibers will be dissolved ("deliquescence") or partially dissolved ("deliquescence") by the solvent vapor and suffer structural dam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D01D5/00B08B1/00
CPCB08B1/00D01D5/00D01D5/0007D04H1/728
Inventor 侯豪情程楚云孔岐忠王琦
Owner JIANGXI ADVANCED NANOFIBER S&T CO LTD