Vacuum electro-spinning device

Abstract

The invention provides a controllable electro-spinning direct-writing device, in particular a vacuum electro-spinning device for remote direct writing of micro-nanofiber / fiber membranes, and relates to a spinning device. The vacuum electro-spinning device is provided with a vacuum cavity, a spray head, a collection plate, a liquid supply guide pipe, a liquid supply device, a high-voltage power supply, a vacuum pump, an air guide pipe, an air pressure meter, a lifting mechanism, an XYZ three-dimensional motion platform and a controller, wherein the XYZ three-dimensional motion platform, the spray head and the collection plate are arranged in the vacuum cavity; the spray head is mounted on a Z-axis bracket of the XYZ three-dimensional motion platform; the collection plate is arranged on an XY horizontal motion platform of the XYZ three-dimensional motion platform; an anode of the high-voltage power supply is connected with the spray head; a cathode of the high-voltage power supply is connected with the collection plate and is grounded; and the controller is connected with the high-voltage power supply, the XYZ three-dimensional motion platform, the vacuum pump and the air pressure meter respectively.

Description

technical field [0001] The invention relates to an electrospinning device, in particular to a vacuum electrospinning device capable of long-distance electrospinning and directly writing micro-nano fiber / fiber film structures. Background technique [0002] Due to their high specific surface area and superior mechanical, optical, and electrical properties, nanofibers are widely used in many fields such as national defense, medicine, chemical industry, and electronics. Micro-nano fibers with specific patterns and arrangements are controllable and on-demand. Fiber / fiber membrane also has wide application potential in the fields of biological tissue engineering, micro-nano devices, flexible electronics, etc., and electrospinning technology is a kind of preparation nanofiber with many advantages such as low cost, simple process, and wide source of raw materials. One of the most effective technologies of fiber membrane structure has attracted more and more attention from domestic a...

AI Technical Summary

Problems solved by technology

However, due to the influence of various factors in the electrospinning process, there are many unstable phenomena in the polymer jet, and it is difficult to realize the accurate positioning and deposition of micro-nano fibers and the control of fiber arrangement. Therefore, the controllable order of electrospun micro-nano structures Deposition has gradually become a hot issue in current electrospinning research technology

[0003] At present, it is widely used to prepare controllable and ordered micro-nanofiber structures, mainly using specific fiber collectors, such as cylinder collectors, parallel plate collectors, etc., but the micro-nanofibers obtained by this method are limited by the shape of the collector. , the deposition pattern is difficult to change, and the fiber distribution range is uncontrollable, especially the controllable deposition of a single micro-nano fiber cannot be achieved

Yang et al. (Ying Yang, Zhidong Jia, Lei Hou et al. IEEE Transactions on Dielectrics and Electrical Insulation, Vol.15(1): 269-276) placed the nozzle in the center of the insulating circular sleeve to prepare micro-nano fibers. It was found that this method can reduce the unstable whipping of the jet and limit the deposition range of micro-nano fibers on the collection plate, but it cannot achieve effective control of the fiber deposition range

[0004] Sun et al. (Sun D.H., Chang C., LiS., etal.Nano.Lett., 2006vol.6, pp.839-842) proposed a near-field electrospinning direct writing technology, by shortening the distance from the nozzle to the collecting plate (0.5~ 3mm) makes the spinning jet deposit on the collecting plate before entering the disorderly motion stage, realizing the deposition of a single nanofiber, and at the same time cooperating with the movement of the collecting plate can prepare micro-nano fiber structures with different deposition trajectories, but this The method shortens the distance between the nozzle and the collecting plate, reduces the space movement of nanofibers and the time for solvent volatilization, which is not conducive to the preparation of uniform nanofibers

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