A kind of preparation method of three-dimensional three-dimensional fiber film

Abstract

The invention provides a method for preparing a three-dimensional fiber membrane, and relates to the technical field of electrospinning. The method comprises the following steps: preparing a receivingelectrode having a three-dimensional structure by a low melting point metal; applying a positive voltage to an emitter electrode, and grounding the receiving electrode or applying a negative voltageto perform electrospinning to cause a spinning solution to form nanofibers attached to the receiving electrode, the spinning temperature being lower than the melting point of the low melting point metal; after the spinning is finished, heating the receiving electrode to which the nanofibers are attached to allow the receiving electrode to be melted, and obtaining the three-dimensional fiber membrane by separation. The melting point of the low melting point metal is lower than the heat distortion temperature of a polymer. The nanofiber membrane can be separated by heating, so that the fiber membrane having a complicated three-dimensional structure of arbitrary shape can be spun by constructing the receiving electrodes of different shapes, and the structure process is simple.

Description

Technical field [0001] The invention relates to the technical field of electrostatic spinning, and particularly relates to a method for preparing a three-dimensional fiber membrane. Background technique [0002] Electrospinning is a special fiber manufacturing process in which polymer solutions or melts are jet-spinned in a strong electric field. Under the action of an electric field, the droplet at the needle will change from a spherical shape to a conical shape (that is, a "Taylor cone"), and extend from the tip of the cone to obtain a filament. In this way, polymer filaments with nanometer diameter can be produced. [0003] Nanofiber membranes made by electrospinning are widely used in tissue engineering, controlled drug release, sensors and other fields due to their high specific surface area and high aspect ratio. The existing electrostatic spinning device generally includes: a DC high-voltage power supply, a spinning head and a receiver, the spinning head is used as an emit...

AI Technical Summary

Problems solved by technology

[0004] The inventors have found that the two-dimensional structure of the nanofibrous membrane greatly limits the application of the fibrous membrane, for example, in tissue engineering, a biomimetic scaffold with a three-dimensional network structure needs to be formed

In the prior art, when forming a nanofiber membrane with a three-dimensional network structure, it needs to be spun with the help of a template, but the traditional template method is difficult to achieve a complex three-dimensional structure, especially difficult to form a microstructure, and the template and the formed nanofiber membrane Difficulty separating

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