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Electrostatic spinning system and electrostatic spinning method for printing compact plane perpendicular to direction of electric field

A technology of electrospinning and electric field direction, which is applied in textiles and papermaking, filament/thread forming, fiber processing, etc. It can solve problems such as the difficulty of preparing a dense plane of a receiving plate and the inability to fully realize 3D printing.

Active Publication Date: 2018-07-10
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nanofiber 3D printing is at the forefront of the development of additive technology manufacturing, but the existing electrospinning technology can only realize the printing of two-dimensional planes or curved surfaces parallel to the direction of the electric field, and cannot fully realize the true 3D printing.
Due to the semiconductor properties of the required polymers in the existing electrospinning technology, during the electrospinning process, there is an interaction (or attraction) between the electrospun fibers that are flying towards the receiving plate and the fibers that have been deposited on the receiving plate. or repulsion), it is difficult to prepare a dense plane parallel to the receiving plate, which leads to challenges in realizing true 3D printing
However, this kind of flat or curved surface printing only realizes the accumulation of fibers in the 2D direction, not the real 3D object

Method used

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  • Electrostatic spinning system and electrostatic spinning method for printing compact plane perpendicular to direction of electric field
  • Electrostatic spinning system and electrostatic spinning method for printing compact plane perpendicular to direction of electric field
  • Electrostatic spinning system and electrostatic spinning method for printing compact plane perpendicular to direction of electric field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Electrospinning process of molten polycaprolactone

[0047] 1) Put polycaprolactone granules into a glass syringe with a stainless steel needle and heat to 160°C to melt, keep warm for 6 hours, remove air bubbles, place on a bolus injection pump, and adjust the bolus injection rate to 0.5mL / h.

[0048] 2) Connect the two ends of the high-voltage power supply to the metal needle and the conductive plate connected to the grounding wire, so that a high-voltage electric field is formed between the metal needle and the conductive plate connected to the grounding wire; adjust the distance between the metal needle and the receiving plate by 1cm, The distance between the metal needle and the conductive plate is 20cm, so that the injected liquid droplets form tiny streams under the action of a high-voltage electric field, and under the action of the electric field force, they are further stretched into nano-sized fibers, and finally the static electricity The spun fibers are eve...

Embodiment 2

[0053] Electrospinning Process of Polycaprolactone in Solution State

[0054] 1) Dissolve 20% polycaprolactone in 10ml hexafluoroisopropanol in advance. After it is completely dissolved, suck the solution into a 10ml glass syringe, place it on the injection pump, and adjust the injection rate to 1.2ml / h .

[0055] 2) Connect the two ends of the high-voltage power supply to the conductive plate connected to the metal needle and the grounding wire, so that a high-voltage electric field is formed between the metal needle and the conductive plate; adjust the distance between the conductive receiving plate with an insulating film and the metal needle The distance between the conductive receiving plate with an insulating film and the conductive plate connected to the ground wire is 19 cm, so that the droplet can be stretched rapidly under the action of a high-voltage electric field, and then accurately deposited on the corresponding position of the receiving plate .

[0056] 3) Fi...

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PUM

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Abstract

The invention relates to an electrostatic spinning system and an electrostatic spinning method for printing a compact plane perpendicular to the direction of an electric field. According to the electrostatic spinning method, by adjusting the distances among a conductive receiving plate with an insulating film, a metal needle, and a conductive plate connected with a grounding wire in the electrospinning device, and by means of the back and forth movement of the receiving plate, an electrostatic pen fixed at one end of the entire electrostatic spinning device eliminates residual charges depositing on the surfaces of fibers, so that the compact plane perpendicular to the direction of the electric field is printed. Since real 3D printing is obtained by repeatedly stacking on the basis of the original compact plane, the electrostatic spinning method for printing the compact plane perpendicular to the direction of the electric field lays a foundation for the real 3D printing. The system andthe method are simple in preparation method, easy in obtaining of the printed electrostatic spinning fiber compact plane perpendicular to the direction of the electric field, low in cost and high in universality, thus being applicable to various environment-friendly type polymers.

Description

technical field [0001] The invention belongs to a printing electrostatic spinning device and method, and relates to an electrostatic spinning system and method for printing a dense plane perpendicular to the direction of an electric field. Background technique [0002] The preparation of fibers by electrospinning technology was first proposed in 1934 by Formhal in a patent that charged the colloidal solution of artificial silk by high-voltage static electricity to prepare silk protein. Subsequently, it was found that electrospinning technology has become a feasible method to obtain ultrafine fibers. The fibers produced by electrospinning have the advantages of high specific surface area, simple processing technology, and wide source of raw materials. The basic principle of electrospinning technology is: under the action of a high-voltage electric field, the polymer droplet (molten state or solution state), the droplet at the needle is stretched from a spherical shape to a co...

Claims

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Application Information

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IPC IPC(8): D01D5/00
CPCD01D5/0061D01D5/0076D01D5/0092
Inventor 尹大川张托弟何凤利邓旭东周雅青
Owner NORTHWESTERN POLYTECHNICAL UNIV