Electrostatic spinneret system based on solid needle spinneret device

Abstract

The invention discloses an electrostatic spinneret system based on a solid needle spinneret device. The solid needle spinneret device comprises a solid needle and a needle sleeve, wherein the solid needle comprises a needle body and a needle point arranged at one end of the needle body in a sleeving way; a center hole matched with the solid needle is formed in the needle sleeve in the axial direction; the solid needle is arranged in the needle sleeve in a sleeved way through the center hole; the outer wall of the solid needle is in clearance fit with the hole wall of the center hole; a liquid feeding passage is formed in the side wall of one end of the needle sleeve; the liquid feeding passage penetrates through the side wall of the needle sleeve and communicates with the center hole; a liquid inlet valve is arranged in the liquid feeding passage; one end, relatively near the liquid feeding passage, in the center hole is provided with a liquid outlet valve. In the designed solid needle spinneret device, the solid needle and electrode rings covered by the needle sleeve are used and the electrostatic repulsion force and the tail end effect phenomenon between the needle heads can be effectively weakened; meanwhile, each electrode ring and the receiving electrode have the proper distance through regulating the height of the electrode ring; the uniform field intensity can be realized, so that the uniform spinneret effect can be achieved.

Description

technical field [0001] The invention relates to the technical field of electrostatic spinning, in particular to a solid needle spinning system and the electrostatic spinning system used therein. Background technique [0002] In a broad sense, nanofibers refer to fibers with a diameter below 1000nm, which have the characteristics of large specific surface area and high porosity, and are widely used in high-efficiency filtration materials, wound dressings, tissue engineering, composite materials, battery electrodes, and micro-nano devices. [0003] Electrospinning is a method of preparing nanofibers by stretching a polymer solution or melt by an electric field force generated by a high-voltage DC power supply. It is currently one of the most effective techniques for preparing nanofibers. Electrospinning includes two categories: solution electrospinning and melt electrospinning. Among them, solution electrospinning has developed rapidly due to its simple equipment and process. ...

AI Technical Summary

Problems solved by technology

[0008] In view of the above-mentioned problems existing in the existing electrospinning technology field, an electrostatic spinning system based on a solid needle spinning device is now provided, aiming to solve the problem of needle blockage, inconvenient cleaning, and single spinning of traditional needle-tube electrostatic spinning devices. Problems such as limited solution volume, uneven field strength, and existing "edge effects" and problems such as solvent volatilization, uncontrollable spinning jet flow, and excessive energy consumption caused by open liquid supply in needleless electrospinning

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