Rotary multi-needlepoints electrostatic spinning device

Abstract

The invention discloses a rotary liquid-quenching batch electrostatic spinning device with a plurality of needlepoint group arrays, and the electrostatic spinning device is provided with a roller group and collection cloth that are used for batch collection for nanofibers. The electrostatic spinning device is provided with needlepoint groups, a sleeve, an electrode plate, a support, a rotary shaft, a coupler A, a DC (Direct Current) motor, a flume, a backflow plate, a solution guide pipe, a solution supply pump, a conveying roller, the collection cloth, a guide frame, an arc-shaped plate, a pressure roller, a collection roller, a coupler B, a roller motor, a high-voltage power supply, an infrared sensor and a main control board. Electrostatic spinning is carried out by introducing needlepoints, so that the solution backflow phenomenon and nozzle plugging are overcome, so as to reduce the critical starting voltage for spinning and improve the stability of jet flow of a spinning awl; the electrostatic spinning is carried out by using needlepoint group arrays, and the roller group and the collection cloth are combined as a collection device, thereby realizing batch manufacturing for the nanofibers and uniform non-woven fabric collection; solution is supplied in a way that the needlepoint groups rotate for quenching solution in the flume, so that the uniformity of solution supply can be realized, and the uniformity of diameters of the collected nanofibers is improved.

Description

technical field [0001] The invention relates to an electrostatic spinning device, in particular to a large-area, multi-jet spinning and collecting electrostatic spinning device with a multi-spinneret array. Background technique [0002] Electrospinning is a new technology that can easily produce nanofibers. In recent years, with the development of nanotechnology, electrospinning technology has also been fully studied and has been widely used in bioengineering, filter materials, chemical The fields of catalysis and flexible electronics. Electrospinning mainly uses an external electric field to polarize the surface of the solution to generate surface charges. The surface charges stretch the solution under the action of the electric field to form a Taylor cone. Continuously increasing the effect of the electric field will generate a jet from the tip of the Taylor cone, and the jet whips in space. The nanofibers are finely refined by dynamic motion, and finally deposited on the...

AI Technical Summary

Problems solved by technology

Traditional electrospinning devices mainly use injection needles or capillary tubes as nozzles, and form a droplet meniscus under the extrusion of a syringe pump. The main reason is that they have a high aspect ratio and can better focus the electric field so that the The electric field strength is higher, which can better make the meniscus generate rheology and spray to form a jet; the use of similar capillaries and injection needles as nozzles simplifies the equipment required for electrospinning, but also introduces nozzles The problem of clogging, because the inner diameter of the electrospinning nozzle is generally at the level of 100 microns, once the clogging is not easy to deal with, especially when the needle nozzle of the array is introduced for large-scale electrospinning, it will seriously affect the behavior of multi-jet jetting and nanofibers. Uniformity; At the same time, a common disadvantage of capillary nozzles is that there will be solution backflow inside the hanging drop at the nozzle, and unstable solution backflow will affect the stability of the electrospinning tap-jet mode

In addition, the liquid supply rate has a great influence on the diameter of nanofibers produced by electrospinning. It is difficult for a general multi-nozzle electrospinning device to achieve the uniformity of multi-nozzle liquid supply. Detailed and complex flow channel design can be achieved, but The overall equipment cost and complexity are increased

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