Device and method for preparing highly effective continuous electrostatic spinning nano fibre felt

A nanofiber and preparation device technology, applied in fiber processing, textiles and papermaking, filament/wire forming, etc., can solve the problems of not being able to form Taylor cones, thicker polymer films, and demanding settings, and achieve electrospinning The silk is smooth, the uniformity is improved, and the output is improved

Inactive Publication Date: 2008-07-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, experiments have shown that when the metal rod rotates in the polymer solution, it is particularly easy to form a layer of polymer film on the surface of the metal rod. As the experiment progresses, the thickness of the polymer film will become thicker, which will seriously affect the spinning process.
Therefore, this electrospinning method has strict requirements on the setting of process parameters such as the depth of the metal rod immersed in the spinning solution, the rotational speed of the metal rod, and the concentration of the solution. Once the conditions are not met, Taylor cones cannot be formed on the surface of the metal rod. making it difficult to spin

Method used

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  • Device and method for preparing highly effective continuous electrostatic spinning nano fibre felt
  • Device and method for preparing highly effective continuous electrostatic spinning nano fibre felt
  • Device and method for preparing highly effective continuous electrostatic spinning nano fibre felt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Dissolve 87 g of polyvinyl alcohol 1750 (molecular weight 1700, degree of alcoholysis 50%) in 1000 ml deionized water, add appropriate amount of sodium chloride and citric acid to make a transparent non-precipitating PVA spinning solution with a concentration of 8%. Adopt "T" type uniform distributor, the nozzle diameter is 2mm, and the density is 2 nozzle holes / cm. A grooved metal roller is used, the length is 50cm, the diameter is 5cm, the rotation speed is 4r / min, and the applied static voltage is +50kV. The receiving distance between the metal drum surface and the fiber receiving web was 35 cm. According to the above implementation steps, a nanofiber mat is prepared, the fiber diameter distribution is between 300-600nm, and the average output is 20g / h.

Embodiment 2

[0040] Dissolve 52.6 g of polyethylene oxide (molecular weight: 1,000,000) in 1,000 ml of deionized water, and add an appropriate amount of sodium chloride to prepare a transparent non-precipitating PEO spinning solution with a concentration of 5%. Adopt "T" type uniform distributor, the nozzle diameter is 1.5mm, and the density is 2 nozzle holes / cm. A grooved metal roller is used, the length is 50cm, the diameter is 5cm, the rotation speed is 4r / min, and the applied static voltage is +50kV. The receiving distance between the metal drum surface and the fiber receiving web was 35 cm. According to the above implementation steps, a nanofiber mat is prepared, the fiber diameter distribution is between 200-500nm, and the average output is 18g / h.

Embodiment 3

[0042] Dissolve 87 g of polyvinyl alcohol 1750 (molecular weight 1700, degree of alcoholysis 50%) in 1000 ml deionized water, add appropriate amount of sodium chloride and citric acid to make a transparent non-precipitating PVA spinning solution with a concentration of 8%. A hanger-type uniform distributor is used, the diameter of the spray hole is 2mm, and the density is 2 spray holes / cm. A brad nail type metal drum is used, the length is 50cm, the diameter is 5cm, the rotation speed is 4r / min, and the applied static voltage is +50kV. The receiving distance between the metal drum surface and the fiber receiving web was 35 cm. According to the above implementation steps, a nanofiber mat is prepared, the fiber diameter distribution is between 300-500nm, and the average output is 23g / h.

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Abstract

The invention relates to a preparing device of a high-effective continuous-type electro-spin nanometer fiber felt, the invention comprises a fluid supply system, a metal roller, a receiving device and a spinning fluid recycling groove. The process for preparing comprises firstly, preparing polymer spinning fluid with correct concentration in a dissolution kettle, temporarily storing in a liquid storage tank after passing through a filter, secondly, connecting the metal roller and the positive electrode of a high-pressure electrostatic generator, applying correct electrostatic pressure, leading an aluminium screen cloth to connect ground, thirdly, leading the metal roller to rotate in correct rotary speed, fourth, starting a measuring pump, feeding spinning liquid from the liquid storage tank to an even allotter, leading the spinning liquid to be evenly allocated to a spraying hole on the front end of the even allotter, sputtering from the spraying hole to the surface of a rotating metal roller to form Taylor awl, fifthly, leading a coiling drum to rotate to drive a fiber receiving net to move, and continuously receiving nanometer fiber felt. The process for preparation of the nanometer fiber felt of the invention has high production efficiency, which is suitable for scale production of electro-spinning.

Description

technical field [0001] The invention belongs to the field of electrospinning nanofiber mats, in particular to a preparation device and a preparation method of high-efficiency continuous electrospinning nanofiber mats. Background technique [0002] As early as 70 years ago, someone began to study the preparation of nano-fiber materials by electrospinning. At present, hundreds of polymer nanofibers can be prepared. The method has simple process and convenient operation, and the diameter of the fiber is 100-1000 times smaller than that obtained by the ordinary spinning method, and has a huge specific surface area and a complex pore structure. These unique properties make electrospun fiber materials have broad application prospects, not only as high-efficiency filter materials, but also in biomedical materials, chemical sensors, protective materials, nanocomposites and other fields. [0003] However, the traditional electrospinning method generally uses a single-needle electros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/16D01D5/00D01D1/06
Inventor 王新厚李志民孙亚峰
Owner DONGHUA UNIV
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