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Combined needle used for electrostatic spinning

An electrospinning and combined technology, applied in textiles and papermaking, filament/thread forming, fiber processing, etc., can solve the problems of easy clogging and multi-jet stability, etc., achieve simple design, increase production speed, and film quality high effect

Active Publication Date: 2017-12-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the existing electrospinning needles / nozzles are easy to block and the stability of multi-jet flow is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A combined needle for electrospinning is composed of a hollow stainless steel needle and a stainless steel needle base with a discharge tip. The hollow stainless steel needle includes hollow annular tubes with different upper and lower inner and outer diameters. The inner wall of the lower hollow annular tube is equipped with internal threads. The specific parameters are as follows: the upper hollow annular tube is 10mm high, the outer diameter is 2mm, and the wall thickness is 0.2mm; the lower hollow annular tube The height is 14mm, the outer diameter is 3.7mm, the internal thread is left-handed, and the cross-sectional shape of the thread is triangular.

[0041] The base of the stainless steel needle with the discharge tip adopts a double-thread locking structure, and one end of the screw part of the double-thread locking structure fastener has two threads with different pitches. The ring tube at the bottom of the stainless steel needle base with discharge tip is 10mm...

Embodiment 2

[0044] A combined needle for electrospinning is composed of a hollow stainless steel needle and a stainless steel needle base with a discharge tip. The hollow stainless steel needle includes hollow annular tubes with different upper and lower inner and outer diameters. The inner wall of the lower hollow annular tube is equipped with internal threads. The specific parameters are as follows: the upper hollow annular tube is 11mm high, the outer diameter is 2.5mm, and the wall thickness is 0.25mm; The pipe height is 13mm, the outer diameter is 4mm, the internal thread is left-handed, and the cross-sectional shape of the thread is rectangular.

[0045]The base of the stainless steel needle with the discharge tip adopts a double-thread locking structure, and one end of the screw part of the double-thread locking structure fastener has two threads with different pitches. The ring tube at the bottom of the stainless steel needle base with discharge tip is 9.5mm high and 4mm in outer ...

Embodiment 3

[0048] A combined needle for electrospinning is composed of a hollow stainless steel needle and a stainless steel needle base with a discharge tip. The hollow stainless steel needle includes hollow annular tubes with different upper and lower inner and outer diameters. The inner wall of the lower hollow annular tube is equipped with internal threads. The specific parameters are as follows: the upper hollow annular tube is 12mm high, the outer diameter is 4.3mm, and the wall thickness is 0.3mm; The pipe height is 12mm, the outer diameter is 3.7mm, the internal thread is left-handed, and the cross-sectional shape of the thread is triangular.

[0049] The base of the stainless steel needle with the discharge tip adopts a double-thread locking structure, and one end of the screw part of the double-thread locking structure fastener has two threads with different pitches. The ring tube at the bottom of the stainless steel needle base with discharge tip is 9mm high and 4.3mm in outer...

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Abstract

The invention relates to a combined needle used for electrostatic spinning. The combined needle is characterized by comprising a hollow stainless steel needle body and a stainless steel needle base with a discharging tip, and an inner thread is arranged on the bottom surface of the hollow stainless steel needle body; a fastening piece of a double-thread locking structure is adopted by the stainless steel needle base with the discharging tip, and a solid metal wire is fixedly arranged on the upper portion of the stainless steel needle base, so that it is achieved a spinning polymer solution is drawn at the tip of the solid metal wire so as to generate silk; the solid metal wire is welded to the center of a hollow-out support on the inner wall of the outer thread of the stainless steel needle base, and the solid metal wire can be higher than, equal to or lower than the hollow stainless steel needle body. By means of the combined needle, the problems that the liquid outlet end of an existing needle / sprayer used for electrostatic spinning is likely to be blocked, and the multi-jet stability is poor are effectively solved, the spinning solution outlet amount in unit time is increased, and the electrostatic spinning speed is greatly increased.

Description

technical field [0001] The invention relates to a combined needle and belongs to the field of electrostatic spinning. Background technique [0002] In recent years, with the continuous development of nanotechnology, electrospinning has become a simple and effective method for preparing nanofibers and has attracted much attention. Electrospinning devices have been greatly developed, but the needles for electrospinning currently have the following shortcomings: First, the capillary is traditionally used for electrospinning. The inner diameter of the capillary is generally 0.05-0.3mm, which is difficult to process and high in cost, which affects the continuous operation of electrospinning; second, if a solid powder is added to the spinning polymer solution If the functional additives are used, the capillary will be blocked, the efficiency is low, the output is low, and the product quality is difficult to guarantee. [0003] The patent "a trumpet-shaped high-efficiency electros...

Claims

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Application Information

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IPC IPC(8): D01D5/00
CPCD01D5/0069
Inventor 丁彬廖亚龙李玉瑶赵兴雷印霞俞建勇
Owner DONGHUA UNIV
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