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Air jet assisting multi-needle electrostatic spinning device and method for preparing nanofiber net through air jet assisting multi-needle electrostatic spinning device

A nanofiber web and electrospinning technology, applied in fiber processing, textiles and papermaking, filament/thread forming, etc., can solve the problems of needle interference, Taylor cone shape and stability, and improve the volatilization speed , Accelerate the curing and running speed, and increase the output effect

Inactive Publication Date: 2015-08-26
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Needle-free electrospinning increases the fiber yield by forming more jets in a relatively open area, but its Taylor cone shape and stability are difficult to control
The advantage of multi-needle electrospinning is that the shape of the Taylor cone can be well controlled, and the fiber fineness is more uniform, but the interference between each needle is the biggest problem.

Method used

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  • Air jet assisting multi-needle electrostatic spinning device and method for preparing nanofiber net through air jet assisting multi-needle electrostatic spinning device
  • Air jet assisting multi-needle electrostatic spinning device and method for preparing nanofiber net through air jet assisting multi-needle electrostatic spinning device
  • Air jet assisting multi-needle electrostatic spinning device and method for preparing nanofiber net through air jet assisting multi-needle electrostatic spinning device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Dissolve polyacrylonitrile (PAN) in solvent N,N-dimethylformamide (DMF) to prepare a spinning solution with a concentration of 13 wt%. Inject the spinning solution into the syringe 11 of the multi-needle electrospinning device. In an environment at room temperature and 40% relative humidity, turn on the micro syringe pump 13 until the spinning solution circulates normally and set the flow rate to 0.3 mL / h. Turn on the DC high-voltage generator 17, the control voltage is 20kV, and then turn on the air compressor 6, and control the airflow speed to 4m / s. The electrospinning jet is deposited on the surface of the roller 3 in a spiral motion trajectory. The receiving distance between the needle 5 and the roller 3 is 100mm. At this time, the motor 2 is turned on to drive the roller 3 to rotate at a speed of 200r / min. Experimental results show that using this electrostatic spinning equipment to spin, the output per unit time of nanofibers is increased by 50%, the fineness of t...

Embodiment 2

[0049] The polyvinyl alcohol (PVA) 1788 powder was dissolved in distilled water at 70°C to prepare a spinning solution with a concentration of 16% by weight. Inject the spinning solution into the syringe 11 of the multi-needle electrospinning device. At room temperature and a relative humidity of 60%, turn on the micro syringe pump 13 and wait for the spinning solution to circulate normally and set the flow rate to 0.5 mL / h. Turn on the DC high-voltage generator 17, the control voltage is 40kV, and then turn on the air compressor 6, and control the airflow speed to 5m / s. The electrospinning jet is deposited on the surface of the roller 3 in a spiral motion trajectory. The receiving distance between the needle 5 and the roller 3 is 200mm. At this time, the motor 2 is turned on to drive the roller 3 to rotate at a speed of 500r / min. Experimental results show that using this electrostatic spinning equipment to spin, the output per unit time of nanofibers is increased by 60%, the f...

Embodiment 3

[0051] Polyethylene oxide (PEO) was dissolved in distilled water at 60°C to prepare a spinning solution with a concentration of 14% by weight. Inject the spinning solution into the syringe 11 of the multi-needle electrospinning device. In an environment at room temperature and 50% relative humidity, turn on the micro-injection pump 13 and wait for the spinning solution to circulate normally and set the flow rate to 0.4 mL / h. Turn on the DC high-voltage generator 17 with a control voltage of 30kV, and then turn on the air compressor 6 to control the airflow speed at 6m / s. The electrospinning jet is deposited on the surface of the roller 3 in a spiral motion trajectory. The receiving distance between the needle 5 and the roller 3 is 150 mm. At this time, the motor 2 is turned on to drive the roller 3 to rotate at a speed of 350 r / min. Experimental results show that using this electrostatic spinning equipment to spin, the output per unit time of nanofibers is increased by 55%, the...

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Abstract

The invention discloses an air jet assisting multi-needle electrostatic spinning device which comprises a spinneret plate with the air jet assisting function. Multiple metal needles are arranged on the spinneret plate. The head ends of all the metal needles are connected in series through a wire. The wire is connected with the positive electrode of a direct-current high-pressure generator. The tail end of each metal needle is connected with an injector through a liquid guide pipe. The injector is driven through a micro-injection pump. A receiving device is arranged below the spinneret plate and connected with the negative electrode of the direct-current high-pressure generator. By the adoption of the air jet assisting multi-needle electrostatic spinning device, the spinneret plate with the multiple needles serves as a spinning module, on the basis, the air jet assisting function is added to increase the volatilizing speed of a spinning solvent, accelerate jet flow solidification and increase the operation speed, so that the yield of unit time of nanofibers is increased, the fibers are stretched to a certain degree through jet air flow, and the nanofibers with the smaller diameter can be acquired.

Description

Technical field [0001] The invention belongs to the technical field of textile machinery, and relates to an electrostatic spinning device, in particular to an air-jet assisted multi-needle electrostatic spinning device. The invention also relates to a method for preparing a nanofiber web by using the device. Background technique [0002] Electrospinning method is the simplest and low-cost method to produce nanofibers. It refers to the flow and deformation of charged polymer solution or melt in a high-voltage electric field, and then solidify by solvent volatilization or melt cooling, and finally obtain fiber Spinning process of the shape material. Based on the size effect of electrospun nanofibers, it shows good theoretical research value in optics, heat, magnetism, and electricity. At the same time, its practical value in clothing, medicine, energy, electronics, aviation and other fields is also increasing. [0003] Electrospinning has experienced nearly 80 years of development ...

Claims

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Application Information

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IPC IPC(8): D01D5/00D04H1/728
Inventor 刘呈坤王秋实贺海军孙润军陈美玉
Owner XI'AN POLYTECHNIC UNIVERSITY
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