Electrospinning preparation method of nanofibers with material gradient distribution characteristics

Abstract

The invention relates to an electric spinning preparation method of nanometer fiber with material gradient distribution features. A spinning polymer solution is used as mother liquid; the mother liquid is uniformly divided into three parts; additives are sequentially added into the three parts of mother liquid in a way that the content is gradually increased or gradually decreased; the materials are uniformly stirred; inner layer work fluid, middle layer work fluid and outer layer work fluid are formed, and are correspondingly charged into inner, middle and outer fluid injectors; the three fluid injectors are connected with one three-stage coaxial spinning head; the three kinds of work fluid respectively flows into coaxial capillaries of the three-stage coaxial spinning heads; the three-stage coaxial spinning heads generates the nanometer fiber with the material gradient distribution features under the effect of high-voltage static electricity; the nanometer fiber is collected by an aluminum foil covering paper board. The electric spinning preparation method provided by the invention has the advantages that the preparation process is simple; the single step is effective; the prepared inner / middle / outer three-layer structure of the prepared nanometer fiber is clear; in addition, the nanometer diameter is small; the linearity is good; the diameter distribution is uniform; the fiber surface is smooth. Through the material gradient distribution features, the effective implementation method can be provided for the design and the preparation of various novel nanometer materials.

Description

technical field [0001] The invention relates to the preparation of a novel nanometer material, in particular to an electrospinning preparation method of nanofibers with material gradient distribution characteristics. Background technique [0002] High-voltage electrospinning technology (electrospinning) is a top-down nano-manufacturing technology. The jet is formed by overcoming the liquid surface tension and viscoelastic force of the droplets at the tip of the nozzle by applying an electric field force. Under the joint action of Coulomb force and surface tension, the atomized liquid jet is bent, stretched, and split by high frequency, and is stretched tens of millions of times within tens of milliseconds. After solvent volatilization or melt cooling, nanometer particles are obtained at the receiving end. grade fiber. This technology has simple process, convenient operation, wide selection of materials, and strong controllability. It is considered to be the most likely meth...

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at the lack of suitable preparation methods for micro-nano fibers with complex structural characteristics, and proposes an electrospinning preparation method for nanofibers with material gradient distribution characteristics. This method can regulate the internal components of electrospun polymer nanofibers according to the diameter Distribute toward features with increasing or decreasing gradients from outside to inside

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