Needleless electrostatic spinning device

Abstract

The needleless electrostatic spinning device comprises a spinning nozzle and a spinning electrode, the spinning nozzle is used for conveying and distributing a spinning solution, the spinning nozzle is provided with an opening, the spinning electrode is arranged at the opening, and the spinning electrode is used for rotating in the preset direction to excite the spinning solution to form a solution jet flow; the spinning nozzle comprises an inner shell and an outer shell, the inner shell is used for forming a liquid supply cavity for storing a spinning solution, the outer shell is used for forming a liquid return cavity for the spinning solution to flow back with the inner shell, and the liquid supply cavity is separated from the liquid return cavity. According to the needleless electrostatic spinning device, the spinning solution can be uniformly and controllably distributed on the spinning electrode; and meanwhile, the spinning solution which is not brought into the spinning area can be recycled, so that the yield, the uniformity and the quality stability of the nanofiber membrane can be ensured.

Description

technical field [0001] The present application relates to the technical field of electrospinning, in particular to a needle-free electrospinning device. Background technique [0002] As we all know, electrospinning is an efficient technology for preparing continuous nanofibers, which has the advantages of wide selection of raw materials, simple process, high production efficiency, and good controllability of fiber morphology. The electrospinning process is to form the spinning solution into Taylor cones and jets through electrostatic field force, and the jets are stretched and refined under the combined action of charge repulsion, gravity, surface tension and electric field force, and finally nanofibers are deposited on the receiver. on the substrate. [0003] In the prior art, needle-free electrospinning is a new type of electrospinning technology, which has the advantages of high fiber output, simple equipment structure, and easy use and maintenance. Compared with conven...

AI Technical Summary

Problems solved by technology

However, there are still many problems in the current needle-free electrospinning technology. For example, the needle-free electrospinning spinneret exposes a large surface of the solution, and the solvent volatilization causes changes in the properties of the solution, which affects the quality stability of nanofibers; The uneven liquid supply to the head is still the current electrospinning equipment, and the influence of the residual solution inside the spinneret on the fresh spinning liquid is a problem that needs to be solved for the sustainable development of the electrospinning technology.

[0004] Therefore, how to avoid the inability to meet the production and use requirements due to the inability of the existing needle-free electrospinning device to stably generate high-quality nanofibers is a technical problem that those skilled in the art need to solve at present.

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