Umbrella-shaped electrostatic spinning sprayer and electrostatic spinning method

Abstract

The invention relates to an umbrella-shaped electrostatic spinning sprayer and an electrostatic spinning method. The sprayer comprises an umbrella-shaped spinning nozzle, a numerical control type infusion device and a solution collecting groove, wherein the numerical control type infusion device mainly comprises a solution propeller and a controller; the middle of the umbrella-shaped spinning nozzle is provided with a cylindrical hollow portion, and an output end of the solution propeller is placed into the cylindrical hollow portion of the umbrella-shaped spinning nozzle; the controller controls flow velocity and flow of spinning solutions; and the solution collecting groove is placed in the bottom of the umbrella-shaped spinning nozzle. The electrostatic spinning method comprises that a binding post on the umbrella-shaped spinning nozzle is connected with a high-voltage positive electrode, conducting polymer solutions are continuously added to the umbrella-shaped spinning nozzle which is horizontally placed through the numerical control type infusion device, electrostatic spinning is started, collection is achieved through a collecting device, and nano-fibers are formed. The sprayer avoids blocking phenomena, and is easy to clean and good in stability; and the electrostatic spinning method improves production efficiency and the yield of electrostatic spinning.

Description

technical field [0001] The invention belongs to the field of electrostatic spinning devices and methods thereof, in particular to an umbrella-shaped electrostatic spinning nozzle and an electrostatic spinning method. Background technique [0002] Electrospinning is a relatively popular simple method for manufacturing nanofibers. It has become a hot spot in the current research on nanofiber manufacturing due to its excellent characteristics such as simple equipment, easy operation, wide source of materials, and no damage to the material body during the process. The nanofibers produced by electrospinning have the characteristics of small diameter, large specific surface area, and high porosity, and have great application potential in the fields of biomedicine, air filtration, and protective clothing. [0003] Electrospinning is to bring the polymer solution to thousands or even tens of thousands of volts of high-voltage static electricity. The charged droplets form a Taylor co...

AI Technical Summary

Problems solved by technology

However, there is serious mutual interference in the electric field between needle-type spinneret holes, and it is difficult to obtain large-scale promotion

Moreover, in the traditional electrospinning process, the propulsion speed of the infusion is slow, and the flow rate of the spinning solution is small. The method of increasing the delivery speed cannot guarantee the stability of the spinning and cannot carry out normal production.

In addition, affected by the viscosity and spinnability of the spinning solution, the diameter of the spinneret hole is mostly in the micron level, which is prone to clogging due to too fast volatilization of the solvent, resulting in production interruption, which affects production efficiency, and is difficult to maintain and difficult to clean. defect

At present, the open-up spinneret studied by some scholars has improved the needle spinneret to a certain extent, but there are still many shortcomings, such as the surface viscosity of the polymer solution caused by solvent volatilization, and it is difficult to form a stable jet under the same parameter conditions. , or the instability of the jet will affect the smooth progress of the spinning process, or the increase in the number of jets is limited, and the increase in the output of nanofibers is not obvious, etc.

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