Novel efficient linear nozzle for electrostatic spinning

Abstract

The invention discloses a novel efficient linear nozzle for electrostatic spinning. The novel efficient linear nozzle is characterized by comprising a heat control device and a conducting device; the heat control device is of a long cavity and a high-voltage electrostatic receiving end and is provided with a heating and temperature control device, and a linear nozzle is arranged at the bottom of the cavity; the conducting device is elongated and disposed in a cavity of the heat control device, connected with the high-voltage electrostatic receiving end of the heat control device and disposed at the linear nozzle of the bottom of the cavity, and saw-toothed protrusions are formed at the edge of the bottom of the conducting device. The novel efficient linear nozzle for electrostatic spinning has the advantages that the difficulty in synchronous heating and pressurizing of the nozzle of melt electrostatic spinning is overcome; the novel efficient linear nozzle is in the shape of a triangular prism, the mode of stacking single-hole or multi-hole nozzles is omitted, so that multiple spinning jet flows can be generated, productivity of electrostatic spinning is improved greatly on the premise of reducing processing difficulty; and the aperture of the nozzle is convenient to regulate so that outflow speed of spinning solution is convenient to control.

Description

technical field [0001] The invention relates to a novel high-efficiency electrospinning linear nozzle, which belongs to the field of electrospinning. Background technique [0002] Electrospinning is a method of producing nanofibers using electric field force as the main drawing force. It has the characteristics of simple operation and wide applicability, and has received extensive attention in recent years. [0003] According to the state of spinning liquid, electrospinning can be classified into solution electrospinning method and melt electrospinning method. Solution electrospinning is relatively simple to operate and easy to control, and under appropriate solution conditions, ultrafine fibers with a diameter of tens of nanometers can be prepared. However, the volatilization of the solvent in the electrospinning process will pollute the environment, and there are problems such as solvent residue. Relatively speaking, melt electrospinning does not use solvents, but heats...

AI Technical Summary

Problems solved by technology

[0004] Melt electrospinning has high requirements on the spinning device, mainly because the melt electrospinning spinning solution is in a molten state, with high viscosity and surface tension, and there is no solvent volatilization during the spinning process of melt electrospinning, and the fiber The thinning only depends on the stretching of the electrostatic field force, so it is required to apply higher voltage and higher temperature to the spinning solution, and the excessively high voltage will cause serious discharge of the spinning device at the feeding end and spinning end, making the normal The spinning process cannot be carried out continuously, and there are certain safety hazards

At the same time, melt electrospinning requires a heating device. The heating methods at this stage include: laser heating, gas heating, microwave heating, and circulating liquid, etc., but these methods have imprecise temperature control, small temperature adjustable range, and inaccurate Conducive to the disadvantages of industrialization, focusing on industrialization, electric heating is generally used, but the heating circuit and high-voltage circuit exist at the nozzle at the same time, which may cause equipment failure due to electrostatic discharge, and it is difficult to simultaneously apply electric heating and high-voltage static voltage at the nozzle

Moreover, most of the nozzles at the present stage are spun in the form of a single hole or a multi-hole, so that the spinning efficiency is low and the nozzles are not easy to process.

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