Strip-shaped spraying head for electrostatic spinning

Abstract

The invention relates to spraying heads for electrostatic spinning, and provides a strip-shaped spraying head for electrostatic spinning, which can increase the yield of electrostatic spinning equipment and improve the thickness uniformity of spun fiber membranes and cannot be blocked. The strip-shaped spraying head comprises a solution feeding mechanism, a strip-shaped conductive sheet and a conductive sheet bracket, wherein the strip-shaped conductive sheet is fixedly connected with the conductive sheet bracket; the solution feeding mechanism is used for uniformly coating the surface of one side of the long edge of the strip-shaped conductive sheet with a spinning solution. During spinning, the strip-shaped conductive sheet is connected with the anode of a high-voltage direct-current power supply, a spinning collection plate is connected with the cathode of the high-voltage direct-current power supply, the solution is uniformly applied to the surface of one side of the long edge of the conductive sheet through the solution feeding mechanism, the solution on the strip-shaped conductive sheet forms electro-spinning under the action of an electrostatic force, and the solution feeding mechanism continuously coats the strip-shaped conductive sheet with the solution. The strip-shaped spraying head is simple in structure, the yield is greatly increased in comparison with that of a conventional spraying head for needle electro-spinning, no problem of spraying head blockage is caused, and the thickness uniformity of the spun nano fiber membranes is relatively high.

Description

technical field [0001] The invention relates to an electrostatic spinning nozzle, in particular to a strip-shaped nozzle for electrostatic spinning. Background technique [0002] With the continuous development of nanotechnology in recent years, electrospinning has become an important method for preparing nanofibers and has attracted much attention. The electrospinning method is widely used, from industrial synthetic polymers to cellulose, collagen, protein, DNA complexes and other raw materials can be spun, and antibiotics, nanoparticles, etc. can be added during the spinning process , to prepare various functional fibers. [0003] The traditional electrospinning technology is the most widely used technology for preparing nanofibers. It uses a high-voltage electrostatic generator to generate thousands of volts or even tens of kilovolts of high-voltage static electricity to apply pressure in the polymer solution or melt, making the tip of the needle The droplet deforms to ...

AI Technical Summary

Problems solved by technology

However, the preparation process of this method is unstable, and the problem of clogging of porous tubes is also difficult to solve

Chinese patent CN200810153891.9 reports a non-woven non-batch electrospinning device, which uses a metal cylinder immersed in a polymer solution and cast with a tapered thread as the nozzle to replace the traditional needle-point nozzle for spinning. Although it is significantly improved, it has the disadvantage of high injection voltage threshold and cannot spin nanofibers containing two substances at the same time.

Images