A kind of preparation method of ring structure micro-nano fiber

Abstract

The invention belongs to the technical field of preparation of micro-nano fibers, and relates to a preparation method of a micro-nano fiber with an annular structure. The preparation method comprises the following steps of firstly, preparing an electrostatic spinning solution, and loading the prepared electrostatic spinning solution into a spinning solution container, wherein the area of a metal collection device with adjustable adjusting area is 9-15mm2, and the distance between a spinning spray head and a glass sheet is 5-20cm; then, opening a high-pressure electrostatic generator, adjusting the voltage to 10-40kV, performing the electrostatic spinning for 10-30s, and closing the high-pressure electrostatic generator, so as to obtain the micro-nano fiber with the annular structure. The preparation method has the advantages that the preparation process is simple, the structure of the adopted device is simple, the distribution of electric fields in the preparation process is centralized, the easiness in loss of charges is avoided, the action of internal repelling is continuously performed, and the prepared micro-nano fiber with the annular structure has the positive promotion function on broadening the application range of the electrostatic spinning fiber.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of micro-nano fibers, and relates to a method for preparing ring-shaped micro-nano fibers, in particular to a method for preparing ring-shaped micro-nano fibers by electrostatic spinning technology. Background technique: [0002] With the warming up of nanotechnology, electrospinning technology, as a simple, efficient and versatile method that can continuously prepare ultrafine fibers with a diameter as small as a few nanometers, has attracted extensive attention from researchers in recent years. The implementation of electrospinning technology needs to include high-voltage power supply, spinneret and receiving device, etc.; the spinning liquid first forms a Taylor cone under the action of its own gravity, viscous force, surface tension, internal charge repulsion force and external electric field force. When the power supply voltage exceeds a certain critical value, the electric field force o...

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Problems solved by technology

But so far, there have been no reports on the preparation of ring-shaped micro-nano fibers by electrospinning technology and the systematic analysis of their formation mechanism.

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