A device for generating controllable waveform micro-nano fibers

Abstract

The invention provides a device for generating micro / nano-fibers with controllable waveforms. The device comprises a precision injection pump, a precision injection pump feed mechanism guide rail, an injector push rod, an injector, an electrostatic spinning sprayer, auxiliary electrodes, a controllable power supply, a motion platform, a collector, a high-voltage direct-current power supply, a control system and a power lead screw, wherein the injector is installed on the precision injection pump, the precision injection pump controls the feed rate of a solution inside the injector through an injector push mechanism, the electrostatic spinning sprayer is installed at the tail end of the injector and used for forming an electrostatic spinning environment, the collector is installed on the motion platform and used for collecting fibers and providing a spinning environment, and the motion platform is used for providing the motion speed and direction of a collecting board in a near field direct writing mode. According to the device, electric fields between the two auxiliary electrodes change, the stress of jet flow in air also changes in the spinning process, so that the deposited track of the jet flow also changes, and the shape and the size of the deposited fibers can be controlled by controlling output signals of the controllable power supply.

Description

technical field [0001] The invention is a controllable waveform micro-nano fiber generating device, which belongs to the innovative technology of the controllable waveform micro-nano fiber generating device. Background technique [0002] Electrospinning technology Electrospinning technology was first proposed by Formhzls in 1934, and then Taylor et al. proposed the concept of Taylor cone for the deformation of charged polymers in the electrospinning process in 1964. It was not until the 1990s that people began to Extensive attention has been paid to electrospinning technology. In 2000, Reneker et al. did a study on the instability of jet bending in electrospinning of polymer solution. The paper mentioned that the reason for the generation of wave-shaped nanofibers in electrospinning is that the bending of electrospinning is unstable. In 2001, Yarin et al. did further research on jet instability in the electrospinning process. In 2007, Han et al. did about the deposition of...

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Problems solved by technology

[0004] However, in these application prospects, there are certain requirements for the shape and size of wave-shaped nanofibers. The above-mentioned production methods for wave-shaped nanofibers cannot well control the shape and size of wave-shaped fibers. Therefore, a In near-field electrospinning, a controllable electric field is applied to the auxiliary electrode to achieve controllable deposition of nanofibers.

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