Device for production of nanofibres through electrostatic spinning of polymer solutions

Abstract

The invention relates to device for production of nanofibres through electrostatic spinning of polymer solutions comprising a spinning chamber, in which the reservoir of polymer solution is positioned, into which by a section of its circumference extends the rotating spinning electrode of elongated shape connected to one pole of high voltage source of direct current, to whose opposite pole there is connected the collecting electrode arranged in the spinning chamber against the spinning electrode, while a section of circumference of the spinning electrode extends into a polymer solution in the reservoir while the reservoir of polymer solution is divided into the inlet section, into which leads at least one inlet opening, and into which the spinning electrode extends by a section of its circumference, and the outlet section, which is provided with outlet opening.

Description

technical field [0001] An apparatus for the production of nanofibers by electrospinning of polymer solutions, comprising a spinning chamber in which a container of polymer solution is arranged, a part of the perimeter of a rotating spinning electrode of elongate shape extending into the polymer solution, the spinning electrode is connected to one pole of a direct current high voltage power supply, while a part of the periphery of the spinning electrode extends into the polymer solution in the container, it is placed against the spinning electrode on the The collecting electrode in the spinning chamber is connected to the opposite pole of the DC high voltage power supply. Background technique [0002] The known device according to CZ294274 for the production of nanofibers by electrospinning of polymer solutions comprises a spinning chamber inside which is arranged a container of polymer solution with an open liquid surface. Inside the polymer solution container, there is rot...

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Problems solved by technology

[0003] Since in most applications high voltages are introduced into the polymer solution either directly or through the spinning electrodes, the level of the solution in the vessel cannot be adjusted or monitored by common electronics and sensors

Quite frequently it happens that the level of the solution in the container does not remain at a constant level, which leads to the fact that the spinning electrodes immersed in the polymer solution also do not remain constant, so either too little or too much Quantity of polymer solution is brought out into the spinning space

In the first case, the production capacity of the electrospinning device cannot be exploited optimally, while in the second case a polymer solution film is produced on the surface of the spinning electrode which has not yet Solidification during spinning in the spinning space, which leads to a gradual decrease in the efficiency of the electrospinning device

[0004] Another disadvantage of the state of the art is that, due to the relatively high viscosity of the polymer solution brought into the container through the opening, mostly at the bottom of the container, it is not possible to carry the polymer solution along the entire length of the polymer container. The length is evenly spread out in time, so that the liquid level is different along the length of the container, which can happen when the polymer solution overflows one part of the spinning electrode, while the other part of the spinning electrode is not immersed in the polymer solution at all

Furthermore, this is further complicated by the fact that, due to the influence of the physical and chemical properties of the polymer (especially at a distance from the container), there are areas with "spent" polymer solution, thus in the Congealing may occur in these places

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