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Rotary double-needle electrospinning device and method for preparing uniform nanofiber membrane

A nanofiber membrane, electrospinning technology, applied in fiber processing, textiles and papermaking, filament/thread forming, etc., can solve the problems of not collecting fibers, uneven fiber membrane, and difficult to completely cover the fiber membrane, etc. Achieve the effect of simple equipment, improved thickness uniformity, and increased area

Inactive Publication Date: 2017-03-15
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the needles are misplaced in this method, it is difficult to ensure that the fiber membranes spun by different needles completely cover the entire receiving screen. In the end, the entire fiber membrane spun will not collect fibers in some areas, or they will be densely interspersed. , thus causing the inhomogeneity of the fiber membrane

Method used

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  • Rotary double-needle electrospinning device and method for preparing uniform nanofiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Polyacrylonitrile (PAN) was dissolved in a solvent N,N-dimethylformamide (DMF) to prepare a spinning solution with a concentration of 13 wt%. The spinning liquid is injected into the syringe 6, and the temperature inside the spinning chamber 20 is 25°C and the relative humidity is 40% by controlling the temperature regulator 13 and the humidity regulator 14. Turn on the micro-injection pump, set the flow rate to 0.3mL / h, turn on the DC high-voltage generator 8, and control the voltage to 20kV, the electrospinning jet is deposited on the collection curtain 21 in a spiral trajectory, and the drive motor 12 is turned on to drive the rotary platform 10 to rotate, Turn on the shutter roller and rotate forward and reverse 10 times to obtain a nanofibrous membrane with uniform thickness. The CV value of the square meter gram weight of the nanofiber membrane is 9.25%.

Embodiment 2

[0053] Polyvinyl alcohol (PVA) 1788 powder was dissolved in 70° C. distilled water to prepare a spinning solution with a concentration of 16 wt%. The spinning solution is injected into the syringe 6, and the temperature inside the spinning chamber 20 is 25°C and the relative humidity is 60% by controlling the temperature regulator 13 and the humidity regulator 14. Turn on the micro-injection pump, set the flow rate to 0.5mL / h, turn on the DC high-voltage generator 8, and control the voltage to 40kV, the electrospinning jet is deposited on the collection curtain 21 in a spiral trajectory, and the drive motor 12 is turned on to drive the rotating platform 10 to rotate, Turn on the shutter roller and rotate forward and reverse 10 times to obtain a nanofibrous membrane with uniform thickness. The CV value of the square meter gram weight of the nanofiber membrane is 8.78%.

Embodiment 3

[0055] Polyethylene oxide (PEO) was dissolved in 60° C. distilled water to prepare a spinning solution with a concentration of 14 wt%. The spinning solution is injected into the syringe 6, and the temperature inside the spinning chamber 20 is 25°C and the relative humidity is 50% by controlling the temperature regulator 13 and the humidity regulator 14. Turn on the micro-injection pump, set the flow rate to 0.4mL / h, turn on the DC high-voltage generator 8, and control the voltage to 30kV, the electrospinning jet is deposited on the collection curtain 21 in a spiral trajectory, and the drive motor 12 is turned on to drive the rotary platform 10 to rotate, Turn on the shutter roller and rotate forward and reverse 10 times to obtain a nanofibrous membrane with uniform thickness. The CV value of the square meter gram weight of the nanofiber membrane is 7.65%.

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Abstract

The invention discloses a rotary type double needle electrostatic spinning device which comprises a rotary spinneret device, a collecting device and a temperature-regulating and humidity-regulating device. The rotary spinneret device comprises a horizontal spray pipe, the horizontal spray pipe is fixed on a rotating platform through a lifting frame, the rotating platform is connected with a rotating shaft, the rotating shaft is driven by a motor to rotate, and accordingly the rotating platform is driven to rotate. The rotating platform is further provided with a micro-injection pump and a direct-current high voltage generator. The top of the horizontal spray pipe is provided with a pair of metal needles, the bottom of the horizontal spray pipe is connected with the direct-current high voltage generator through a wire, a liquid inlet of the horizontal spray pipe is connected with a syringe through a liquid guiding pipe, and the syringe is driven by the micro-injection pump to perform injection. According to the rotary type double needle electrostatic spinning device, through double-needle rotary spinning, it can be guaranteed that fibers in the whole deposition breadth range perform 360-degree covering free of blind corners, the thickness evenness of different areas of collected fibrous membranes is remarkably improved, and the rotary type double needle electrostatic spinning device is simple and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of textile machinery, and relates to an electrostatic spinning device, in particular to a rotary double-needle electrostatic spinning device, and also relates to a method for preparing a uniform nanofiber film by using the device. Background technique [0002] Nanofibers are widely used in battery separators, filters, regenerative medicine, wound dressings, electrolyte membranes, nanocapsules, nanoreinforcements, sensors, etc. Electrospinning is a simple, effective and economical method for preparing nanofibers, which can produce micro / nanofibers with diameters ranging from tens of nanometers to several microns. [0003] Traditional laboratory-level electrospinning technology generally focuses on single-needle electrospinning, but the efficiency of obtaining fibers in this process is low, and the output is small, which cannot meet the requirements of industrialization. In order to solve the problem of small...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00D04H1/728
Inventor 刘呈坤贺海军孙润军陈美玉来侃
Owner XI'AN POLYTECHNIC UNIVERSITY
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