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Device and method for preparing regular arranged macromolecular nano-fibre

A nanofiber and macromolecule technology, applied in fiber processing, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of complex receiving device, large external influence on electric field control, and inability to obtain a large-area ordered structure with regular arrangement.

Inactive Publication Date: 2007-08-08
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods can obtain a certain degree of arranged spinning; but the improved receiving device (such as the rotating shaft method) is often very complicated; the electric field control is greatly affected by the outside world, and it is difficult to accurately control; and these two methods cannot obtain a large area with regular arrangement. ordered structure

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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  • Device and method for preparing regular arranged macromolecular nano-fibre
  • Device and method for preparing regular arranged macromolecular nano-fibre
  • Device and method for preparing regular arranged macromolecular nano-fibre

Examples

Experimental program
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Effect test

Embodiment 1

[0040]With reference to Fig. 2, make a magnetron electrospinning device of the present invention. The device consists of a spinneret 1 for containing the polymer solution 2, and a nozzle 3 is installed at the end of the spinneret 1, the nozzle 3 is a ground medical syringe needle, the syringe needle and the high-pressure generator 5 The positive poles are connected as anodes; 2 NdFeB permanent magnets are used as the first permanent magnet 7 and the second permanent magnet 7', an aluminum foil 6 is arranged between the first permanent magnet 7 and the second permanent magnet 7', and the 2 permanent magnets The distance between them is 5 cm; a piece of aluminum foil 6 is connected to the negative pole of the high voltage generator 5 as a cathode, and the cathode is grounded at the same time; the nozzle 3 is arranged directly above the aluminum foil 6 .

[0041] Compared with the traditional electrospinning device, the magnetron electrospinning device has two more magnets, and t...

Embodiment 2

[0043] In this embodiment, the device of Embodiment 1 is used to carry out the magnetron electrospinning method for preparing polyvinyl alcohol regularly arranged nanofibers of the present invention, and the specific steps are as follows:

[0044] Dissolving polyvinyl alcohol in distilled water, heating to 70° C., magnetically stirring for 2 hours, and then stirring at normal temperature for 6 hours to obtain a 5-20 wt % transparent PVA solution. Add 0.05wt% magnetic nano-particles in the solution, such as nano-Fe 3 o 4 Put the powder into the polymer solution, and ultrasonically disperse for 24 hours. The PVA solution prepared by magnetization was stored in a refrigerator at 4 degrees, and then ultrasonicated for 20 minutes before electrospinning. During magnetron electrospinning, the prepared PVA magnetized polymer solution 2 is contained in the spinneret 1, the distance between the nozzle and the upper surface of the magnet is 10 cm, the nozzle 3 is connected to the posit...

Embodiment 3

[0047] In the device of Example 1, the method for preparing polystyrene regularly arranged micro-nano fibers is the same as that of Example 2, and the specific differences are as follows:

[0048] Polystyrene was dissolved in dimethylformamide (DMF), stirred at room temperature for 8 hours to obtain a 10-30 wt% transparent PS solution. Add 0.08wt% magnetic nano-particles such as nano-Fe to the solution 3 o 4 Powder, ultrasonically dispersed for 24 hours. The magnetized PS solution was stored in a 4°C refrigerator, and then sonicated for 20 minutes before electrospinning. During magnetron electrospinning, put the solution into the syringe of the electrospinning device, the distance between the nozzle and the upper surface of the magnet is 10-20cm, the spinning voltage is 10-30kV, and the distance between the magnets is 10cm.

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Abstract

The invention relates to an equipment for preparing polymer nanometer fiber with regular arrangement and the method. The equipment comprises a spraying silk tube for containing polymer solution. A spraying nozzle is sealed and assembled at the end of spraying silk tube. The nozzle is connected with the positive electrode of high pressure generator and is used as anticathode. An aluminum foil is connected with the negative electrode of high pressure generator and is used as cathode, which is grounded at the same time. The aluminum foil is set between a first permanence magnet and a second one. The nozzle is faced to the aluminum foil. The electrical spinning method controlled by magnet is that soluble macromolecules are put into the corresponding solvent and the concentration is adjusted, the polymer solution with good performance for spinning is confected; magnetic nanometer grains are put into the polymer solution and magnetized polymer solution is formed. In the electrical spinning equipment controlled by magnet, the magnetized polymer solution becomes micro-nano continuous fiber under the effect of electric field and at the same time fibers are arranged along the direction of magnetic line under the effect of external magnetic field to form micro-nano fiber material with parallel arrangement.

Description

technical field [0001] The invention relates to a device and method for preparing regularly arranged macromolecular nanofibers, in particular to an electrospinning device and method for controlling the orderly arrangement of magnetized macromolecular fibers through the action of a magnetic field at a micronano size. Background technique [0002] One-dimensional nanomaterials, such as nanowires, nanobelts, nanorods, nanotubes, and nanofibers, have attracted much attention because of their unique properties and wide potential applications (References: Y.Xia, P.Yang, et al. al. One-dimensional nanostructures: synthesis, characterization, and application, Adv. Mater. 2003, 15, 353). Among the many preparation methods of one-dimensional materials, the electrospinning method has the advantages of simple experimental equipment, low production cost, wide range of preparation materials, and diverse nanostructures (references: D. Li, Y. Xia. Electrospinning of nanofibers: reinventing ...

Claims

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Application Information

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IPC IPC(8): D01D4/00D01D5/00D01F6/14D01F6/18D01F6/22D01F6/64D01F6/10D01F6/62
Inventor 蒋兴宇仰大勇江雷
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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