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Multi-needle V-shaped groove drum electrostatic spinning system and preparation of nano-fiber tuft

A nanofiber, V-groove technology, applied in the field of electrospinning system, multi-needle V-groove drum electrospinning system, can solve the problem of poor orientation, low yield of nanofibers, and inability to bundle nanofibers well. problems, to achieve the effect of improving production efficiency

Inactive Publication Date: 2008-10-08
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these methods, the yield of nanofibers is low, the nanofibers cannot be bundled well, and the degree of alignment is poor.

Method used

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  • Multi-needle V-shaped groove drum electrostatic spinning system and preparation of nano-fiber tuft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Polyacrylonitrile (PAN) (Mw=70,000g / mol) was dissolved in the solvent N,N-dimethylformamide (DMF) to prepare a uniform and stable spinning solution 6 with a concentration of 10wt%. Inject the spinning solution into the syringes 5 of the electrospinning system respectively. Metal needles 4 are installed at the outlets of the syringes 5. At room temperature and in an environment with a relative humidity of 40%, turn on the DC high voltage generator of the electrospinning system. 1 and drum 2, an electrospinning jet is formed between the metal needle 4 and drum 2 for electrospinning, the control voltage is 15kV, the winding speed is 200r / min, the receiving distance is 100mm and the solution flow rate is 0.1mL / h. The electrospinning jet is continuously deposited on the bottom of the V-shaped groove of the drum 2 to form nanofiber bundles with aligned fibers and an arrangement angle of 60°-80°.

Embodiment 2

[0042] Polyvinyl alcohol (PVA) 1788 type powder was dissolved in 70°C distilled water to prepare spinning solution 6 with a concentration of 16 wt%. The spinning solution 6 is respectively injected into each syringe 5 of the electrospinning nanofiber bundle system, and a metal needle 4 is installed at the outlet of the syringe 5, and the DC high voltage of the electrospinning system is turned on at room temperature and in an environment with a relative humidity of 70%. The generator 1 and the drum 2 form an electrospinning jet between the metal needle 4 and the drum 2 for electrospinning, the control voltage is 40kV, the winding speed is 500r / min, the receiving distance is 200mm and the solution flow rate is 0.5mL / min h, The electrospinning jet is continuously deposited on the bottom of the V-shaped groove of the drum 2 to form nanofiber bundles with aligned fibers and an arrangement angle of 70°-90°.

Embodiment 3

[0044] Polyethylene oxide (PEO) (Mw=3×10 5 ) was dissolved in distilled water at 60° C. to prepare spinning solution 6 with a concentration of 13 wt%. The spinning solution 6 is respectively injected into each syringe 5 of the electrospinning nanofiber bundle system, and a metal needle 4 is installed at the outlet of the syringe 5, and the DC high voltage of the electrospinning system is turned on at room temperature and in an environment with a relative humidity of 55%. The generator 1 and the drum 2 form an electrospinning jet between the metal needle 4 and the drum 2 for electrospinning, the control voltage is 28kV, the winding speed is 350r / min, the receiving distance is 150mm and the solution flow rate is 0.3mL / min h, The electrospinning jet is continuously deposited on the bottom of the V-shaped groove of the drum 2 to form nanofiber bundles with aligned fibers and an arrangement angle of 65°-90°.

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Abstract

The invention discloses a V-groove drum electro-spun nano-fiber bundle system, which comprises a drum that the external circumference surface is composed of a plurality V-grooves in sequent connection. The drum is fixed on the drum shaft, which can be driven to rotate through the drum shaft. The drum and the drum shaft are supported through a stent. The upper part of the drum is arranged side by side with a plurality of syringes. The exit of each syringe is corresponded with a V-groove bottom of the drum, and the exit part of each syringe is provided with a metal needle. All the metal needles are in series connection through a wire, which are also connected to the anode of a high-voltage direct current transmitter. The cathode of the high-voltage direct current transmitter is in grounding with the drum. With the use of the system that control voltage is 15 to 40KV, the winding speed is 200 to 500r / min and the deposition distance is 100 to 200mm, the nano-fiber bundle with a better-oriented alignment along the V-groove bottom is obtained. The fiber obtained from the invention is the electro-spun nano-fiber bundle with a better degree of oriented alignment, which provides a wider range of applications for the electro-spun fiber products.

Description

technical field [0001] The invention belongs to the technical field of textile machinery, and relates to an electrospinning system, in particular to a multi-needle V-groove drum type electrospinning system, and also relates to a method for preparing nanofiber bundles by using the system. Background technique [0002] Nanofibers can be used to prepare a variety of materials such as filter materials, biosensors, military protective coatings, three-dimensional tissue scaffolds, composite materials, drug release, dressings, and electronic devices. Electrospinning is a simple method to prepare ultrafine fibers with a diameter of tens of nanometers to tens of microns. It has the characteristics of low cost, large specific surface area of ​​products and suitable for preparing various types of materials. [0003] There are many electrospinning processes, such as the use of specially designed collection screens, micromachined nozzles, and the use of auxiliary electrodes to stabilize ...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01D13/02D01F6/18D01F6/14D01F6/66
Inventor 孙润军刘呈坤来侃王耀武孙垂卿
Owner XI'AN POLYTECHNIC UNIVERSITY
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