Plasma micro-beam coaxial electric polarization induced electronic jet printing device and jet printing method

Abstract

The invention belongs to the related technical field of flexible curved surface electronic conformal micro-nano manufacturing, and discloses a plasma micro-beam coaxial electric polarization induced electronic jet printing device and a jet printing method. The device comprises an ink module, a plasma module and an induced electric field module, the ink module is used for conveying ink materials into a nozzle, the plasma module is used for discharging to generate plasma, the induced electric field module is used for inducing charges to form an electric field so as to eject ink, and the ink module, the plasma module and the induced electric field module are matched to achieve the purpose that a plasma induction strong electric field induces an electrofluid Taylor cone to drive ink jet injection. The induced strong electric field of the plasma is used for focusing a space electric field of an electrojet flying channel, and a flow field of plasma airflow is used for carrying out composite constraint jet whipping and reducing slippage during curved surface deposition caused by a non-uniform electric field. According to the device and the method, accurate directional transportation of jet flow / ink droplets is achieved, and high-precision high-resolution accurate curved surface conformal positioning deposition of the jet flow / ink droplets is achieved.

Description

technical field [0001] The invention belongs to the related technical field of electronic conformal micro-nano manufacturing of flexible curved surfaces, and more specifically relates to a plasma micro-beam coaxial electric polarization-induced electrospray printing device and a spray printing method. Background technique [0002] Jet printing technology realizes large-area, heterogeneous multi-layer, and high-precision manufacturing of micro-nano structures directly on various substrates such as flat / curved surfaces, organic / inorganic, etc., and is considered to be an ideal way for electronic manufacturing of flexible curved surfaces. Electrofluid printing uses a high-voltage electric field to induce the rheology of the pendant drop at the nozzle to form a Taylor cone, and the jet / droplet is ejected from the top of the Taylor cone to achieve micro-nano-sized droplet printing. Micro-nano structures can be prepared using high-viscosity solutions. It breaks through the technic...

AI Technical Summary

Problems solved by technology

[0003] The formation of a stable cone jet in electrojet printing must reach the critical field strength threshold, but when printing on curved substrates, the profile of large curved insulating substrates is high / thick, and it is usually difficult to build sufficient electric field strength

The micro-droplets / jet formed by electrojet printing carry charges themselves, and their space flight trajectory is easily disturbed by external electromagnetic fields. Charges will accumulate when deposited on the surface of high dielectric materials or surfaces with slow charge dissipation (such as insulating substrates, etc.) And produce Coulomb repulsion, resulting in abnormal phenomena such as offset, rebound, retraction or whipping of subsequent ink droplets / jet; while curved substrates or printed structures will cause inhomogeneity of the electric field in space, affecting charged droplets / jet The flight positioning of the jet will cause the flight trajectory of the jet to be disordered or even cause instability such as splitting and atomization.

[0004] In the existing technology, the use of collecting plate induction and auxiliary electrode control are two important control methods to realize the constrained deposition of electrospray printing, but neither of them can accurately control the minimum resolution of single fiber direct writing deposition and fiber micro-nano structure , it is difficult to realize the positioning deposition of high-precision and high-resolution precise micro-nano patterns; the introduction of sheath gas focusing (such as flow focusing, electrodynamic focusing, and air flotation deposition) is a new development trend in the research of spinning jet printing control, and so far Most of them are developed for far-field electrospinning or planar electrospinning direct writing, and the precise deposition and patterning preparation control of single nanofibers on curved surfaces still needs further research.

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