High-frequency core-shell structure micro-droplet ejection device

A technology of core-shell structure and spraying device, which is applied in the direction of liquid spraying device, spraying device, electrostatic spraying device, etc., can solve the problems of limiting the spray rate of micro-droplet printing, different droplet spraying conditions, and difficult control, etc., to achieve Effects of overcoming interference and inhibition, promoting flow, and increasing injection frequency

Active Publication Date: 2020-06-05
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, usually there is a high viscosity difference between the sheath solution and the inner layer solution, and the droplet injection conditions are different. Therefore, it is difficult to control the simultaneous injection of the sheath solution and the inner layer solution and the encapsulation of core-shell droplets.
In addition, the viscosity of the solution also limits the improvement of the droplet printing rate.

Method used

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  • High-frequency core-shell structure micro-droplet ejection device
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  • High-frequency core-shell structure micro-droplet ejection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] see figure 1, a high-frequency core-shell micro-droplet ejection device in this embodiment, comprising a nozzle sheath layer 1, a nozzle inner layer insulating layer 2, a nozzle inner layer 3, a needle core 4, an insulating gasket 5, and a sheath layer liquid inlet interface 6. Sheath layer liquid inlet conduit 7, inner layer liquid inlet transfer port 8, needle core vibration block 9, inner layer liquid inlet catheter 10, needle core vibration controller 11, sheath layer controllable liquid supply device 12, inner layer controllable Liquid supply device 13, inner layer waveform programmable power supply 17, sheath layer waveform programmable power supply 18, sheath layer waveform high-voltage amplifier 19, inner layer waveform high-voltage amplifier 20, the nozzle sheath 1 passes through the sheath layer waveform high-voltage amplifier 19 and the sheath The layer waveform programmable power supply 18 is electrically connected, and the arbitrary waveform output by the s...

Embodiment 2

[0030] see figure 2 , a high-frequency core-shell micro-droplet ejection device in this embodiment, comprising a nozzle sheath layer 1, a nozzle inner layer insulating layer 2, a nozzle inner layer 3, a needle core 4, an insulating gasket 5, and a sheath layer liquid inlet interface 6. Sheath layer liquid inlet conduit 7, inner layer liquid inlet transfer port 8, needle core vibration block 9, inner layer liquid inlet catheter 10, needle core vibration controller 11, sheath layer controllable liquid supply device 12, inner layer controllable Liquid supply device 13, sheath layer liquid inlet catheter connector 14, inner layer liquid inlet catheter connector 15, nozzle inner layer conductive plate 16, inner layer waveform programmable power supply 17, sheath layer waveform programmable power supply 18, sheath layer waveform high voltage Amplifier 19, inner waveform high-voltage amplifier 20, the nozzle sheath 1 is electrically connected to the sheath waveform programmable powe...

Embodiment 3

[0037] see image 3 , this example and figure 2 The structure of the embodiment is basically the same, the difference is that the number of needle cores 4 matches the number of nozzle inner layers 3, each needle core 4 is connected to a needle core vibration block 9, and the number of needle core 4 vibrators is multiple , a plurality of needle core vibration controllers 11 are respectively connected to a plurality of needle core vibration blocks 9 .

[0038] During the use of this embodiment, the sheath layer solution and the inner layer solution flow through the sheath layer liquid inlet conduit 7 and the inner layer liquid inlet conduit 10 respectively from the sheath layer controllable liquid supply device 12 and the inner layer layer controllable liquid supply device 13 The sheath liquid inlet transfer port 6 and the inner layer liquid inlet transfer port 8 realize the uniform liquid supply to the sheath layer 1 and the inner layer 3 of the nozzles of multiple coaxial no...

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Abstract

The invention provides a high-frequency core-shell structure micro-droplet ejection device. The high-frequency core-shell structure micro-droplet ejection device comprises a nozzle sheath, a nozzle inner layer, a needle core, a sheath controllable liquid supply device, an inner layer controllable liquid supply device, a sheath waveform programmable power supply, an inner layer waveform programmable power supply, a sheath waveform high voltage amplifier and an inner layer waveform high voltage amplifier; the nozzle inner layer is embedded in the nozzle sheath; and an nozzle inner layer insulating layer is arranged on the surface of the nozzle inner layer. A voltage and a frequency of a high voltage power supply are controlled to be matched with the properties of a solution by independent power supply control to the nozzle sheath and the nozzle inner layer, so that the precise regulation of the volume of micro-droplets and a multi-core wrapped core-shell structure is realized, and the high-frequency vibration needle core is introduced to promote the flow of a micro interface of the solution, so that the simultaneous ejection of a sheath solution and an inner layer solution which havethe high viscosity difference and the core-shell wrapping are realized, and the ejection frequency of the core-shell structure micro-droplets is improved.

Description

technical field [0001] The invention relates to the field of electro-hydraulic coupling injection, in particular to a high-frequency core-shell micro-droplet injection device. Background technique [0002] Microdroplets have broad application prospects in the fields of microreactors, drug entrapment, functional material synthesis, tissue engineering, and personal care due to their small size and large specific surface area. Using the core-shell structure to wrap micro-droplets can form a closed system, ensure the stability of the micro-environment, avoid material penetration between adjacent micro-droplets, and isolate cross-contamination. At present, micro-core-shell droplets are mainly prepared by microfluidic chips, but the design of the chip channel is complex and the processing cost is high; limited by the size of the channel and the characteristics of the solution, it is difficult to achieve the controllable generation of high-viscosity micro-core-shell droplets. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B5/00B05B5/16B05B7/06
CPCB05B5/00B05B5/16B05B7/06
Inventor 郑高峰姜佳昕陈华坛康国毅柳娟郑建毅刘益芳
Owner XIAMEN UNIV
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