A solid needle electrospinning device

Abstract

The invention relates to an electrostatic spinning device with solid needles, and belongs to the field of nano-fiber preparation. The electrostatic spinning device with the solid needles comprises a solution supply system, a solid needle spinneret system, a lifting system, a power supply system, a receiving device and a control system. According to the electrostatic spinning device with the solid needles, the solid needles are wrapped with insulating solution guide rods, so that electrostatic repulsion between the solid needles is obviously reduced; the insulating solution guide rods make close contact with conical countersunk through holes in the bottom of a spinneret solution storage box, the gaps between the insulating solution guide rods and the conical countersunk parts become large when the insulating solution guide rods move upwards under driving of the lifting system, and thus droplets flow out along the bottom cones of the insulating solution guide rods; the tips of the solid needles are excited by an electric field to produce Taylor cones, and as the insulating solution guide rods can move vertically, the blocking phenomenon in capillary needle type electrostatic spinning can be effectively avoided; the distance between each solid needle and a receiving electrode is made proper by adjusting the height of the insulating solution guide rods, the field intensity uniformity at the tips of the solid needles can be achieved, and thus the uniform spinning effect can be achieved.

Description

technical field [0001] The invention relates to an electrostatic spinning device, in particular to a solid needle electrostatic spinning device, which belongs to the field of nanofiber preparation. Background technique [0002] In a narrow sense, nanofibers refer to fibers with a diameter of less than 100nm. They have the characteristics of large specific surface area and high porosity, and are widely used in high-efficiency filtration materials, wound dressings, tissue engineering, composite materials, battery electrodes, and micro-nano devices. [0003] Electrospinning is a method of preparing nanofibers by stretching a polymer solution or melt by an electric field force generated by a high-voltage DC power supply. It is currently one of the most effective techniques for preparing nanofibers. Electrospinning includes two categories: solution electrospinning and melt electrospinning. Among them, solution electrospinning has developed rapidly due to its simple equipment and ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a solid-needle electrospinning device to solve the problem of needle blockage, inconvenient cleaning, uneven field strength and existing "edge effect" of the traditional needle-tube electrospinning device. "And other issues

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