Electrospinning device and method for a three-dimensional nanofiber assembly

Abstract

The invention discloses an electrostatic spinning device and method for a three-dimensional nanofiber assembly. The electrostatic spinning device comprises a high-voltage electrostatic generator, a liquid supply device, an ejecting device and a receiving device. The receiving device comprises a motor, a rotor cage provided with the turning radius and a support, wherein the motor is connected with the rotor cage through a rotating shaft, and the rotor cage is a sliding block connecting rod hinged mechanism and comprises a connecting rod assembly used for receiving deposited nanofiber and sliding block assemblies located at the two ends of the connecting rod assembly. The two ends of the connecting rod assembly are hinged to the sliding block assemblies, the sliding block assemblies are axially sleeved on the rotating shaft in a sliding mode and rotates along with the rotating shaft synchronously, the radial distance between the connecting rod assembly and the rotating shaft becomes the turning radius, the axial length of the connecting rod assembly is smaller than or equal to that of the sliding block assembly, and the sliding block assembly slides towards the two ends of the rotating shaft. The electrostatic spinning device and method for the three-dimensional nanofiber assembly has the advantages of being simple in structure, easy to operate, capable of manufacturing the three-dimensional nanofiber assembly with a controllable loosening degree, and wide in application range.

Description

technical field [0001] The invention belongs to the field of nanofiber material preparation, and in particular relates to an electrostatic spinning device and method of a three-dimensional nanofiber assembly. Background technique [0002] Electrospinning, also known as electrospinning, electrostatically atomizes the polymer fluid (the fluid can be a solution or a melt), splits it into tiny polymer jets, and solidifies to form fibers during the jet injection process. The electrospinning device mainly consists of four parts: spinneret, receiving device, polymer fluid supply system and high-voltage electrostatic generator. The specific working principle is: the polymer fluid supply system supplies the polymer fluid to the tip of the spinneret, and at the same time The high-voltage electrostatic generator (thousands to tens of thousands of volts output) acts on the tip of the spinneret, and a large amount of electrostatic charge is generated on the surface of the fluid droplet a...

AI Technical Summary

Problems solved by technology

Within 48 hours after spinning, the fiber mat is immersed in a solvent, pre-frozen, and then freeze-dried to obtain a three-dimensional three-dimensional scaffold with large pores and holes interpenetrating with each other. The original structure of nanofibers will be destroyed during processing

[0007] Another example is the Chinese patent of CN102358959A, which discloses a method for preparing an electrospun fiber support with a three-dimensional structure and its preparation device. It proposes that the receiving device be set in a bowl shape, and three-dimensional electrospun fibers are prepared on the bowl-shaped wall. In this technology The bowl-shaped structure is not conducive to the deposition of fibers on it, and it is easy to cause disconnection and winding agglomeration of electrospun fibers, and the preparation effect is not ideal

[0008] Another example is the Chinese patent with the publication number CN102586901A, which discloses a preparation method and device for a three-dimensional electrospun non-woven support material. The electrospinning technology of the turntable is adopted, and the rotating speed of the turntable is used to make the surrounding solution be stretched into ultrafine Fiber, because the charge accumulated on the fiber during the spinning process is difficult to dissipate quickly, resulting in electrostatic repulsion, which increases the distance between fibers and makes the spinning structure in a three-dimensional loose state. However, the work control is more complicated, and the electrostatic repulsion alone , in fact, it is impossible to ensure a loose three-dimensional spinning structure

[0009] In summary, there are still great challenges and limitations in obtaining 3D nanofiber assemblies, and improvements are necessary

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