A V-groove-based invisible droplet guidance method

A V-groove and droplet technology, applied in the analysis of materials, instruments, etc., can solve the problems of complex operation, inability to guide non-magnetic droplets, and easy derailment

A V-groove and droplet technology, applied in the analysis of materials, instruments, etc., can solve the problems of complex operation, inability to guide non-magnetic droplets, and easy derailment

CN108627666BActive Publication Date: 2021-12-31NORTHWESTERN POLYTECHNICAL UNIV +1
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  • A V-groove-based invisible droplet guidance method
  • A V-groove-based invisible droplet guidance method
  • A V-groove-based invisible droplet guidance method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Select a hydrophilic substrate. In this embodiment, the substrate material is an acrylic plate, and a V-shaped groove with a width of 0.4 mm, a depth of 4 mm, and a linear track with a path length of 180 mm is designed.

[0041] (2) Carve a V-groove track on the substrate body by using a precision numerical control machine tool.

[0042] (3) Use a high-speed camera to detect the quality of the V-groove, determine the precise size of the V-groove, and select a qualified V-groove track with a width of 0.4mm and a depth of 4mm for testing.

[0043] (4) Drop water droplets with a volume of 63 μL on the track, adjust the inclination angle α of the guiding device to 30°, and the included angle with the direction of the component of gravity on the inclined plane, that is, the deflection angle β, to be 10°, so that the droplets are on the track inner movement.

[0044] In the experiment, the droplets will slowly infiltrate into the V-shaped groove track, and form a liquid ...

Embodiment 2

[0046] (1) Determine the material of the hydrophilic substrate. In this embodiment, the substrate material is an acrylic plate. The width of the V-shaped groove is designed to be 0.4mm, the depth is 4.3mm, 3.6mm, 3.0mm, 2.0mm, and the path length is 180mm. W-shaped track.

[0047] (2) Carve a V-groove track on the substrate body by using a precision numerical control machine tool.

[0048] (3) Use a high-speed camera to detect the quality of the V-groove, determine the precise size of the V-groove, and select a V-groove track that meets the above design requirements for testing.

[0049] (4) Drop water droplets with a volume of 63 μL on the four tracks respectively, adjust the inclination angle α of the guiding device to 30°, and the deflection angle β to 0°, so that the droplets move in the track.

[0050] In the experiment, the droplets will slowly seep all over the V-groove track, and recondense into droplets at the lower end of the track. Due to the different depths of t...

Embodiment 3

[0052] (1) Select a hydrophilic substrate. In this embodiment, the substrate material is an acrylic plate. The design determines that the width of the V-shaped groove is 0.4mm, the depth is 4.3mm, 3.6mm, 3.0mm, and 2.0mm, and the path length is 180mm. The S-shaped curved track.

[0053] (2) Engraving a V-shaped groove on the substrate body by using a precision numerical control machine tool.

[0054] (3) Use a high-speed camera to detect the quality of the V-groove, determine the precise size of the V-groove, and select a V-groove track that meets the design requirements for testing.

[0055] (4) Drop water droplets with a volume of 63 μL on the four tracks respectively, adjust the inclination angle α of the guiding device to 30°, and the deflection angle β to 0°, so that the droplets move in the track.

[0056] In the experiment, the droplets will slowly seep all over the V-groove track, and recondense into droplets at the lower end of the track. Due to the different depths...

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Abstract

The invention discloses a V-groove-based liquid droplet implicit guidance method. A precision numerical control machine tool is used to manufacture a V-groove track with a triangular cross-sectional shape on a hydrophilic substrate body. When the droplet falls on the long and narrow V-shaped groove track, it follows the principle of minimum energy and completely penetrates into the rough V-shaped groove with a large solid-liquid contact area. When the track is given a certain inclination angle, that is, the plane where the track is located and When the horizontal plane is at a certain angle, the droplet will recondense into a droplet at the lower end of the track under the action of gravity, thereby controlling the trajectory of the droplet. The guidance method will not cause the droplet to derail, and realize the hidden sex guide. The droplet implicit guidance method has no additional requirements on the track type, and the droplet implicit guidance method can be used for the straight track, curved track, or broken line track. The droplet implicit guidance method is easy to operate, has a wide range of applications, is less affected by the environment, and can effectively expand the controllable types of droplets.

Description

technical field [0001] The invention relates to the technical field of droplet behavior control, in particular to a V-groove-based invisible droplet guidance method. Background technique [0002] In recent years, with the development of microfluidic technology, droplet behavior control technology has become an emerging research hotspot, and has been widely used in many fields such as anti-icing, drug delivery, and self-lubrication. Among them, the method of controlling the movement path of the droplet by constructing the guide track to promote the droplet to move along the track is called the droplet guidance method. [0003] At present, there are many methods for controlling droplet guidance. Chinese patent CN 104345140A proposes a "magnetic droplet control device and magnetic droplet control method". This control method is limited to controlling the movement path of magnetic droplets. Magnetic droplets cannot be guided; the invention patent CN106432767A relates to "a prep...

Claims

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Application Information

Patent Timeline
31 Dec 2021
Publication
CN108627666B
IPC
G01N35/10
CPC
G01N35/10
Inventors
胡海豹; 董琪琪