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Production method and device for continuous nano-fiber yarn

A nanofiber and production method technology, applied in the textile field, can solve problems such as poor yarn continuity, complex equipment, and poor uniformity, and achieve the effects of improved mechanical properties, convenient operation, and improved evenness

Active Publication Date: 2014-09-24
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The preparation of nanofibers by mechanical twisting method, air eddy current twisting method, dynamic water bath method, ribbon fiber web aggregation method and auxiliary electric field method all have certain limitations, common problems are complicated equipment, poor continuity, poor uniformity and low strength of the yarn. And other issues

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
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  • Production method and device for continuous nano-fiber yarn
  • Production method and device for continuous nano-fiber yarn
  • Production method and device for continuous nano-fiber yarn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment relates to a production method and device for electrospinning continuous nanofiber yarn (see figure 1 ). Before spinning, weigh a certain amount of polyacrylonitrile (PAN, molecular weight: 80000g / mol) and dimethylformamide (DMF) to mix with 8% mass percent concentration, stir evenly at a temperature of 80°C, and statically Set for 2h to obtain PAN solution. When spinning, the prepared PAN solution was filled into syringes 3 and 4 for spinning, respectively. Then adjust the parameters so that the angle and distance between the two spinnerets are respectively 80° and 160mm, the vertical distance between the spinnerets and the plane of the rotating disk 5 is 70mm, and the distance between the rotating disk 5 and the winding device 7 is 450mm, and the distance between the rotating disk 5 The distance between the tank and the liquid tank 6 is 250mm, and the pressure roller 8 is housed in the liquid tank, and the hot water of 60 ℃ is filled in the liquid ta...

Embodiment 2

[0040] This embodiment relates to a production method and device for electrospinning continuous nanofiber yarn (see image 3 ). The difference from Embodiment 1 is that the liquid tank 6 and the pressure roller 8 are eliminated, and the coils are directly collected and wound to the winding device 7 . Before spinning, take a certain amount of polyvinyl alcohol (PVA, molecular weight is 3000g / mol) and solvent (ethanol and distilled water with 1: 1 mass ratio mixture) and mix with 16% mass percentage concentration, at 80 ℃ Stir evenly at high temperature and let it stand for 2 hours to obtain a PVA solution. When spinning, put the prepared PVA solution into syringes 3 and 4 for spinning. Then adjust the parameters so that the angle and distance between the two spinnerets are 100° and 160mm respectively, the vertical distance between the spinnerets and the plane of the rotating disk 5 is 80mm, and the distance between the rotating disk 5 and the winding device 7 is 450mm. The so...

Embodiment 3

[0042] This embodiment relates to a production method and device for electrospinning continuous nanofiber yarn (see Figure 4 ). The difference from Example 2 is that a filament of 0.5 m / min passes through the middle of the turntable as the core yarn. Before spinning, weigh a certain amount of polyacrylonitrile (PAN, molecular weight: 80000g / mol) and dimethylformamide (DMF) to mix with 8% mass percent concentration, stir evenly at a temperature of 80°C, and statically Set aside for 2 hours to obtain a PAN solution. When spinning, put the prepared PAN solution into syringes 3 and 4 for spinning. Then adjust the parameters so that the angle and distance between the two spinnerets are 100° and 160mm respectively, the vertical distance between the spinnerets and the plane of the rotating disk 5 is 80mm, and the distance between the rotating disk 5 and the winding device 7 is 450mm. The core yarn is 300D polypropylene filament, and the unwound polypropylene filament is wound to t...

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Abstract

The invention discloses a production method and device for a continuous nano-fiber yarn. The production method comprises the following processing steps: (1) preparing a polymer solution; (2) performing nano-jet injection and forming fibers; (3) forming the continuous nano-fiber yarn. The production device is designed according to the production method provided by the invention and mainly comprises a spinning system, a twisting system and a winding system, wherein the spinning system comprises an injection pump, an injector, a spinning nozzle and a high-voltage power supply; the twisting system comprises a controller and a turntable; the winding system comprises a solution tank, a roller and a controller. Compared with the prior art, the production method and device provided by the invention are characterized in that the continuous nano-fiber yarn is prepared by rotating and twisting two nano-fiber bundles which are formed by controlling the polarity of the turntable by an electric brush; the continuous preparation of the nano-fiber yarn is realized; the mechanical property of the yarn is increased; the twisting of the yarn is uniform; the yarn levelness is good; the hairiness is less; the application value is huge.

Description

technical field [0001] The invention relates to the field of textiles, in particular to a production method and device for preparing continuous nanofiber yarns by controlling the polarity of a turntable with a brush to form two nanofiber bundles and rotating and twisting them. Background technique [0002] Electrospinning is currently a simple and effective technique for preparing nanofibers. Electrospun nanofibers have excellent properties and can be applied to filter materials, biomedical materials, composite reinforcement materials, sensors and many other aspects, and the prospects are very broad. Nanofibers are mainly collected in the form of non-woven fabrics due to the instability limitation of charged jet bending and stretching, and this disordered structure is restricted in applications that require highly oriented structures. Therefore, the preparation of nanofibers with controllable structures Yarn can expand the application range of nanofibers and has broad poten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02G3/02D01D13/00D01D5/00
Inventor 刘雍王小娥王昆吕汉明周宝明范杰
Owner TIANJIN POLYTECHNIC UNIV
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