Multi-jet-flow electrostatic spinning sprayer with uniformly distributed electric fields

Abstract

The invention relates to a multi-jet-flow electrostatic spinning sprayer with uniformly distributed electric fields. The multi-jet-flow electrostatic spinning sprayer with the uniformly distributed electric fields comprises a solution injection tube, a spinneret plate and an electrode. The spinneret plate is a step-shaped spinneret plate formed by overlaying small circular truncated cones on multiple stages of hollow circular truncated cones, and the upper bottom surface of each stage of circular truncated cone is provided with spinneret orifices. The electrode is consistent with a hollow cavity of the spinneret plate in shape, and a gap is reserved between the electrode and the hollow cavity of the spinneret plate to form a solution cavity. The spinneret plate is made of hydrophobic insulation materials. According to the multi-jet-flow electrostatic spinning sprayer with the uniformly distributed electric fields, holes are formed in the hydrophobic insulation materials so that traditional metal needles can be replaced, electric field rejection between the needles is avoided, the rejection effect of jet flow sprayed out from the spinneret plate is weakened, and therefore nanofibers can be collected conveniently; in addition, the electric fields at the position of a center hole are effectively increased by the utilization of the step-shaped electrode and the spinneret plate matched with the step-shaped electrode, therefore, stable jet flow can be formed at the position of the center hole, and the nanofibers with even fineness can be obtained.

Description

technical field [0001] The invention relates to a multi-jet electrostatic spinning nozzle with uniform electric field distribution, in particular to a needleless multi-jet electrostatic spinning nozzle with uniform electric field distribution. Background technique [0002] Electrospinning technology is a process that can use a high-voltage electrostatic field to control the shape and specification of fibers to manufacture nanofiber webs or continuous fibers that are aligned. This technology is to overcome the surface tension of the polymer solution or melt under a high-voltage electrostatic field of several thousand volts to tens of thousands of volts to generate a charged jet flow. The solution or melt dries and solidifies during the spraying process, and finally falls on the receiving device Form fiber mats or other shapes of fiber aggregates. The core of electrospinning technology is to make the charged fluid flow and deform in the electrostatic field, and finally obtain...

AI Technical Summary

Problems solved by technology

This method is to make the jet flow out from the free liquid surface under the action of a high-voltage electric field to reach the receiving plate. Compared with the multi-needle multi-jet technology, the injection flow rate of each jet in the non-needle multi-jet method is uncontrollable. Therefore, the unevenness of nanofibers produced by this method is high, and the solution forms defects.

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