Multi-material automatic real-time mixed electric spinning direct writing device

Abstract

The invention relates to a multi-material automatic real-time mixed electric spinning direct writing device, and relates to electrostatic spinning. The device includes a hybrid micro channel, a liquid storage device, a liquid conveying pipeline, a driver, a liquid supply hose, a stop valve, a nozzle, a high-voltage power supply, a collecting board, an XYZ three-dimensional mobile platform, a CCD microscope and a computer; the hybrid micro channel is connected with the liquid storage device and the liquid conveying pipeline respectively, the liquid conveying pipeline is connected with the liquid supply hose provided with the driver, the other end of the liquid supply hose is connected with the liquid conveying pipeline divided into two paths, one path of the liquid conveying pipeline is connected with the liquid storage device, the other path of the liquid conveying pipeline is connected with the stop valve, the other end of the stop valve is connected with the nozzle, the nozzle is connected with the positive electrode of the high-voltage power supply, the negative electrode of the high-voltage power supply is connected with the collecting board and then is connected with the ground together with the collecting board, the nozzle and the collecting board are installed on the XYZ three-dimensional mobile platform, the CCD microscope is mounted near the nozzle, and the computer servers as a controller. A micro fluidic chip is used for real-time automatic mixing of electric spinning direct writing multiple-materials, liquid supply and real-time mixing are achieved at the same time by means of the driver, it is ensured that solutions are fully and uniformly mixed, and the efficiency is high.

Description

technical field [0001] The invention relates to electrospinning, in particular to an electrospinning direct-writing device capable of automatic real-time mixing of multiple materials. Background technique [0002] Electrospinning is a process of spraying and stretching precursors in a strong electric field, that is, under the action of an electric field, the liquid droplets at the nozzle change from spherical to conical (ie "Taylor cone"), and then the end of the conical stretches out the jet and evolves into Micro-nano fiber filaments. This method has simple manufacturing equipment, low spinning cost, various types of spinnable materials, and controllable process, and has become one of the main ways to effectively prepare nanofibers. Electrospinning has produced a wide variety of nanofibers, including organic, organic / inorganic composite, and inorganic nanofibers. However, the use of electrospinning technology to prepare nanofibers still faces some problems to be solved (...

AI Technical Summary

Problems solved by technology

This method is suitable for long-term electrospinning direct writing multiphase materials (such as micro-nano solid materials such as liquid and tungsten, carbon nanotubes\wires\ribbons) or mutually incompatible materials (such as suspensions formed by oil and other polymer solutions). solution\melt will appear precipitation delamination or serious agglomeration phenomenon, direct writing stability is poor, and the performance of the deposited micro-nano structure is unstable (Hwang S, Roh K H, Lim D W, et al.Anisotropic hybrid particles based on electrohydrodynamic co -jetting of nanoparticle suspensions.Physical Chemistry Chemical Physics,2010,12(38):11894-11899.)

[0005] Most of the current real-time mixing methods are realized by vibration, mechanical stirring structure or ultrasound, but there are many shortcomings in the real-time mixing of these methods on the solution containing microparticles. For example, the vibration or mechanical stirring structure is mainly used for particle size. The real-time mixing of large solutions is difficult to achieve uniformity in the real-time mixing of solutions containing particles, and the solution is prone to agglomeration, etc. At the same time, the structure of the device is complex and the size is relatively large

Real-time mixing using ultrasonic method takes a long time to get a good effect, and it is also prone to inhomogeneity

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