Preparation method and control method of micro-droplets

A technology of micro droplets and droplets, which is applied in the preparation of microspheres, microcapsule preparations, and the granulation of liquid into bead droplets, etc., can solve the problems of fragility of nozzles, high energy consumption, and high cost, and achieve controllable costs and simple and effective methods. Effect

Active Publication Date: 2020-12-01
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, reducing the size of the nozzle to the micron scale not only greatly reduces its mechanical properties, but also makes the nozzle too fragile for practical applications.
Furthermore, the acquis

Method used

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  • Preparation method and control method of micro-droplets
  • Preparation method and control method of micro-droplets
  • Preparation method and control method of micro-droplets

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] Controllable micro-droplet generation and control of the present invention method, the droplet generator means schematic See figure 2 Indicated. The apparatus employed in the method includes placing super-hydrophobic surface of dual floating table 4, the impact of the droplet generating needle 12, and the recording process of the droplet generator high-speed imaging equipment. Wherein the impact to be embodiments of the present embodiment is a super-bis hydrophobic surface is silica prepared to a candle gray super amphiphobic template surface, and a selection of a sheet having a thickness of 170μm was prepared as a glass substrate, the steps of the preparation process:

[0031] The glass sheet above the candle flame moves back and forth to deposit a layer of uniform gray candle, then placed in a vacuum dryer, a dryer is placed 4ml orthosilicate (TEOS) and 4ml of aqueous ammonia, were placed on both sides of the sample. After sealing the vacuum dryer, 24 h...

Example Embodiment

[0037] Example 2

[0038] Controllable micro-droplet generation and control of the present invention method, the droplet generator means barrel Example 1. In this embodiment the impact to be super-hydrophobic surface bis silica ash in the preparation of the candle ultra amphiphobic template surface, and a selection of a sheet having a thickness of 170μm was prepared as a glass substrate, the steps of the preparation process:

[0039] The glass sheet above the candle flame moves back and forth to deposit a layer of uniform gray candle, then placed in a vacuum dryer, a dryer is placed 4ml orthosilicate (TEOS) and 4ml of aqueous ammonia, were placed on both sides of the sample. After sealing the vacuum dryer, 20 hours is deposited by a vapor deposition method, to obtain the composite surface candle ash carbon particles and silica particles filled. The sample was then placed in a muffle furnace annealed at 540 ℃ temperature for 4 hours to remove carbon particles, to obtain nanoscale h...

Example Embodiment

[0045] Example 3

[0046] A controlled microfluidic droplet is generated and manipulated, and a microtaracene generating device cartridge Example 1 is produced. In this embodiment, the superbucks to be impact to be shocked by the silica superblicit surface prepared by a candle ash, and a sheet glass having a thickness of 170 μm is selected to prepare a substrate, and the preparation process steps are as follows:

[0047] The sheet glass is uniformly moved back and forth above the flame flame to deposit a layer of candle ash, followed by placing it in a vacuum dryer, placed 4 ml of orthosilicate (TEOS) and 4 mL of ammonia water, and placed separately On both sides of the sample. After the dryer seals the vacuum, it is deposited by the vapor deposition method for 20 hours to obtain a composite surface filled with candle gray carbon particles and silica particles. The sample was then placed at a high temperature of 560 ° C for 2 hours in a muffle furnace to remove carbon particles to...

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Abstract

The invention discloses a preparation method and control method of micro-droplets. When the micro-droplets are prepared, the super-amphiphobic surface is firstly prepared, then, micro-droplets with different sizes can be formed on the super-amphiphobic surface by adjusting the suspension height and the inclination angle of the super-amphiphobic surface and the impact speed of the droplets on the super-amphiphobic surface, then a control part with negative electricity is used for being close to the micro-droplets, and under the interaction of charges, grabbing and control over the micro-droplets are achieved. Different from the prior art, the method provided by the invention does not need any additional complex equipment or driving mechanism, can obtain micron-to-millimeter level controllable liquid drops only through the impact of the liquid drops on the super-amphiphobic surface, and can realize lossless control of the liquid drops. The method is simple, convenient and effective, andan effective candidate method is provided for generation and control application of the micro-droplets.

Description

technical field [0001] The invention belongs to the technical field of micro-droplet preparation, and in particular relates to a method for preparing and manipulating micro-droplets. Background technique [0002] As an excellent micro-carrier, micro-droplets have a wide range of applications in the fields of micro-nano technology and biochemical technology such as inkjet printing, biological detection, and microchemical reactors. However, despite their high potential for scientific and industrial applications, microdroplets are often tedious and difficult to generate and manipulate. So far, micro-nanofluidic technologies for generating tiny droplets usually include closed components such as channels, nozzles or needles. The use of closed components will greatly limit the generation of smaller micro-droplets. To obtain smaller micro-droplets, it is necessary to greatly reduce the size of the nozzle or use additional driving mechanisms such as thermal jets, electric fields, e...

Claims

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Application Information

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IPC IPC(8): B01J2/02B01J13/02B01J13/04
CPCB01J2/02B01J13/02B01J13/04
Inventor 邓旭于凡斐孙强强杨金龙
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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