Continuously working and controllable electrostatic jetting device

Abstract

The invention relates to an electrostatic jetting device, in particular to a continuously working and controllable electrostatic jetting device. The invention provides a continuously working and controllable electrostatic jetting device capable of controlling the starting and stopping of electrostatic jetting and stably jetting single jet stream for a long time. The device is provided with a hollow jetting head, lower and upper channels of the jetting head, a conductor probe, an insulated sealing sleeve, an electric spiral adjuster, a liquid supply device, a switch valve, a negative pressure chamber, a high voltage relay, an electrostatic high voltage power supply, an electrically conductive relay, a controller and a collecting plate, wherein the lower end of the hollow jetting head is provided with a nozzle while the upper end of the hollow jetting head is provided with a seal cover; the conductor probe is arranged inside the hollow jetting head and is fixed inside the insulated sealing sleeve, the liquid supply device is communicated with the hollow jetting head through the upper channel of the jetting head, the lower channel of the jetting head is communicated with the negative pressure chamber, the conductor probe is connected with the common end of the high voltage relay, the normally open end of the high voltage relay is connected with an anode of the electrostatic high voltage power supply, a casing of the hollow jetting head is connected with the common end of the electrically conductive relay, and the collecting plate is arranged right below the lower end of the conductor probe.

Description

technical field [0001] The invention relates to an electrostatic spraying device, in particular to a continuously working controllable electrostatic spraying device based on the principle of electro-hydraulic coupling. Background technique [0002] As a new micro-nano manufacturing technology, electro-hydraulic coupling printing technology has attracted increasing attention from industry and academia due to its advantages such as simple process, convenient operation, and wide source of raw materials. Compared with the traditional IC silicon micro-manufacturing technology, the electro-hydraulic coupling inkjet printing technology has simple equipment and low manufacturing cost. It can realize rapid and high-precision manufacturing of micro-nano structures on various substrates under normal temperature, normal pressure and non-clean environment. It can meet the mass continuous production requirements of flexible electronic devices, and can realize the integration of organic el...

AI Technical Summary

Problems solved by technology

The electro-hydraulic coupling printing process is affected by unstable factors such as spatial electric field distribution and solution fluctuations, and it is difficult to achieve precise control of micro-nano structures, which greatly limits the rapid application and development of this technology.

[0004] Sun D.H. et al. ([2] Sun D.H., Chang C., Li S., et al.Nano.Lett., 2006, 6, 839-842) proposed a near-field electrospinning technology, by using a solid probe nozzle, The controllable deposition of single nanofibers can be achieved by reducing the distance from the nozzle to the collecting plate; however, the near-field electrospinning technology adopts the method of rehydrating discrete droplets, which cannot achieve long-term continuous spraying

Chang C et al. ([3]Chang C., Limkrailassiri K., Lin L.W.Appl.Phys.Lett., 2008, 93, 123111) improved the near-field electrospinning technology, using the tip of the probe to pierce the droplet at the nozzle. The method realizes the long-term continuous preparation of ordered nanofibers; however, it is difficult to ensure the stability of the spraying process by manually piercing the droplets, and it is also unable to achieve effective start-stop control of the spraying process, which cannot be improved in industrial production. wide application

Roger et al. ([4] Park Jang-Ung, Hardy Matt, Kang Seong Jun, et al. Nat Mater, 2007, 6, 782-789) used a pulse power supply to print discrete micro-nano droplets, basically realizing the droplet The control of injection frequency and droplet size is affected by factors such as space electric field and solution solvent volatilization. The printing accuracy of micro-nano structure needs to be further improved; adding a conductor needle tip to the hollow nozzle is a nozzle structure commonly used at present ([5 ]Lee S., Byun D., Jun D., et al.Sensors and Actuators a-Physical, 2008, 141, 506-514), the installation of the conductor needle tip reduces the injection starting voltage and reduces the droplet size, through Adjusting the frequency and amplitude of the applied voltage can control the ejection frequency and size of the ejected droplets, but this control method has a complex structure, high requirements on power supply performance, and it is still difficult to complete the free start and stop control of the ejection process and realize the true sense of On-demand, fixed-point printing

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