Combined needle used for electrostatic spinning

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...