Electrospinning direct-writing jet-printing device enhancing focusing function by virtue of double layers of air

Abstract

An electrospinning direct-writing jet-printing device enhancing the focusing function by virtue of double layers of air relates to an electrospinning direct-writing jet-printing device and is provided with a jet head device, air supply devices, a solution tank, a solution supply device, a high-voltage power supply and a collection plate, wherein the jet head device is provided with an outer-layer air jet nozzle, an inner-layer air jet nozzle and a solution jet nozzle; the three jet nozzles are provided with coaxial central through holes; the solution jet nozzle is arranged in the central through hole of the inner-layer air jet nozzle; the inner-layer air jet nozzle is arranged in the central through hole of the outer-layer air jet nozzle; the outer-layer air jet nozzle is provided with an air inlet; the inner-layer air jet nozzle is provided with an air inlet; the solution jet nozzle is provided with a solution inlet hole; the air inlets of the inner-layer air jet nozzle and the outer-layer air jet nozzles are connected with the air supply devices; the solution tank is arranged on the solution supply device and is communicated with the solution jet nozzle through a solution supply pipe; the anode of the high-voltage power supply is connected with the solution inlet hole of the solution jet nozzle; the cathode of the high-voltage power supply is connected with the collection plate; and the collection plate is positioned under the jet head device. The electrospinning direct-writing jet-printing device can strengthen restriction on jet flow, maintain the jet stability of the jet flow and improve the focusing effect.

Description

technical field [0001] The invention relates to an electrospinning direct writing spray printing device, in particular to an electrospinning direct writing spray printing device which enhances the focusing function by means of double-layer gas. Background technique [0002] Electrospinning direct writing based on electro-hydraulic coupling uses an external electric field to act on the viscoelastic solution. Under the action of the electric field force, the viscoelastic solution deforms to obtain a Taylor cone; when the electric field force continues to increase beyond the surface tension of the solution, a jet flows from the Taylor cone. Point injection; using a stable linear jet for orderly jet printing preparation of micro-nano structures. Electrospinning direct writing overcomes the spiral and bending instability of the jet in the traditional electro-hydraulic coupling electro-hydraulic coupling jet printing process, and uses a stable linear jet to prepare ordered micro-n...

AI Technical Summary

Problems solved by technology

[0005] Carry out jet control mechanism, micro-nano structure jet printing positioning verification experimental research, explore jet swing amplitude, jet printing micro-nano structure size, positioning accuracy, critical speed and gas flow rate required to overcome direct writing helical structure, applied voltage, The relationship between process parameters such as the distance from the nozzle device to the collecting plate requires a nozzle device with suitable comprehensive performance to carry out experimental research, so that the design and development of an electrospinning direct-writing jet printing device that uses gas to enhance the focusing function has become an important task. Research hotspots, such as Chinese patents ZL200710009595.7 and ZL201210037687.7 proposed different gas-focused electrospinning printing structures, but the nozzle devices described in these patents all use a single-focus airflow channel, which is not conducive to the gas to Taylor cone and jet injection process. The control function of each part is still independent and scattered, and it is necessary to frequently disassemble and adjust each part during use, which is not easy to simplify and integrate the control of the nozzle device

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