A kind of multi-needle rotary twisting melt electrospinning nano twisted yarn preparation device and method

Abstract

The invention relates to a melt electrospinning nanometer twisted yarn preparing device and method achieving multi-needle rotary twisting, and belongs to the field of electrostatic spinning. The device mainly comprises a heating rod, a center shaft, a flowing channel, a corner handpiece, an extruding machine, a spreader plate, a rolling ball, a worm rod, a thin-walled container, a copper ring, a conical flow guider, multiple single-needle spray heads, a worm wheel, an acrylic board with a hole, an electrode plate, a high-voltage electrostatic generator, a receiving roller and the like. According to the device and method, the conical flow guider is in threaded connection with the center shaft and is arranged to be coaxial with the thin-walled container; the copper ring is arranged between the upper portions of needle heads and the flowing channel to serve as a sealing device; the single-needle spray heads are annularly arranged, so that the spinning efficiency is improved, and the spinning yield is increased; the single-needle spray heads are in threaded connection with a bottom plate of the thin-walled container, and therefore replacing and cleaning are convenient; by replacing the single-needle spray heads with needle head plugs, the fiber number can be controlled; a worm wheel and worm rod transmission device drives the single-needle spray heads to rotate, the twisting degree and the fiber number are controllable, the fiber diameter is uniform, the applicability of nanometer twisted yarn can be improved, and therefore the requirements in different fields are met.

Description

Technical field [0001] The invention relates to a multi-needle rotating and twisting melt electrospun nano twisted yarn preparation device and method, and belongs to the field of electrostatic spinning. Background technique [0002] Now that we have entered the era of nanotechnology, electrospinning has been recognized as the simplest and most effective method for preparing nanofibers. At present, the key issues that hinder the industrialization of melt electrospinning are fiber output, further reduction in fiber diameter and fiber Uniformity of diameter. [0003] Nanofiber twisted yarn is currently another main manifestation of nanofiber aggregates in addition to nanofiber mats, and has potential applications in many important fields. Varabhas et al. designed a porous tube electrospinning device. This method uses a porous hollow hard tube sealed at both ends. The electrode is placed in the tube. The internal electrode of the tube has a small contact area, which is not easy to for...

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Problems solved by technology

Varabhas et al. designed a porous tube electrospinning device. This method uses a porous hollow tube with both ends sealed, and the electrodes are placed in the tube. The electrode contact area inside the tube is small, and it is difficult to form a uniform electric field, and even interfere with the fluid flow characteristics. There is also the problem that small holes are easy to clog

Chinese patent (patent number: 201210554168.8) is a glass fiber twisting process, although it can achieve the effect of twisting, but its twisting stability is low, the orientation and uniformity are poor, and the twist can not be controlled

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