Electrostatic spinning device

Abstract

The invention discloses an electrostatic spinning device. The electrostatic spinning device comprises a spraying nozzle, a collecting device, an electrode and a high-voltage power source. Wherein the spraying nozzle is provided with a gas flow channel in the direction of the axis of the spraying nozzle, liquid flow channels are arranged around the gas flow channel in parallel, an atomizing cavity is formed in the spraying nozzle, an outlet of the gas flow channel and outlets of the liquid flow channels are all communicated with the atomizing cavity, one end of the spraying nozzle is provided with a spraying nozzle hole communicated with the atomizing cavity, the spraying nozzle hole is located on the center axis of the spraying nozzle which is made of metal materials, and the electrode and the spraying nozzle are connected with the positive electrode and the negative electrode of the high-voltage power source respectively. The spraying nozzle adopted in the device is of an inner mixed structure, compared with an outer mixed spraying nozzle without an atomizing cavity, discharged liquid particles are more uniform and smaller due to the mode that spinning liquid and compressed air are mixed in the atomizing cavity, and therefore the diameter of nanofiber obtained through stretching in a high-pressure electric field is smaller, and the nanofiber is more uniform.

Description

technical field [0001] The invention belongs to the field of textiles, and in particular relates to an electrostatic spinning device. Background technique [0002] Electrospinning technology is currently the mainstream method for preparing ultrafine fibers and nanofibers. Nanofibers prepared by electrospinning technology have the characteristics of ultra-high specific surface area, large aspect ratio, and high surface activity. Engineering, biotechnology, medical and health care and other fields have very broad application prospects. With the continuous deepening of research on electrospinning technology, dozens of polymers have successfully prepared ultrafine fibers through electrospinning technology. The diameter of the prepared ultrafine fibers is generally between tens of nanometers and one micron. The diameter of the fiber can reach 1 nm when the conditions are right. The basic principle of preparing ultrafine fibers by electrospinning can be simply summarized as foll...

AI Technical Summary

Problems solved by technology

However, because the needles are prone to blockage, the cleaning and maintenance work is very cumbersome, so the industrialization problem has not been solved well.

In recent years, various needle-free electrospinning technologies, such as spinnerets with structures such as metal rollers, metal balls, metal discs, and spiral coils, have come out one after another. However, due to the structure of their equipment, they are different in various aspects. Some problems, some spinning efficiency is low, some are easy to clog, some solutions dry too fast, some solutions are extremely wasteful, etc.

Images