Film for triggering directional self-bounce of liquid drops and preparation method and application thereof

A droplet and film technology, applied in the field of films that induce directional self-bouncing of droplets and their preparation, can solve problems such as difficulty in realizing directional bouncing transport of droplets

Active Publication Date: 2020-09-01
SHENZHEN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a film that induces directional self-bounce of liquid droplet

Method used

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  • Film for triggering directional self-bounce of liquid drops and preparation method and application thereof
  • Film for triggering directional self-bounce of liquid drops and preparation method and application thereof

Examples

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Embodiment Construction

[0026] The present invention provides a thin film that induces directional self-bounce of liquid droplets and its preparation method and application. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] There is no shortage of biological surfaces in nature that can easily roll off droplets or drive them in a directional way. For example, the surface of the lotus leaf has a micron-nano composite protruding structure, and the liquid droplets can roll off freely due to small sticky obstacles on the surface, so that it has a self-cleaning function; The asymmetric sawtooth structure formed by micron-scale scales allows droplets to quickly roll off in a directional manner on the anisotropic surface of this s...

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Abstract

The invention discloses a film for triggering directional self-bounce of liquid drops and a preparation method and application thereof. The film for triggering directional self-bounce of liquid dropscomprises a plurality of three-dimensional structure units arranged in an array, wherein the surface contour shape of each three-dimensional structure unit is a preset pattern, the preset pattern is asymmetric about a straight line perpendicular to a preset liquid drop bouncing direction, and the surface of each three-dimensional structure unit is a hydrophobic surface. The shape of the surface contour of each three-dimensional structural unit is a pattern which is asymmetric about a straight line perpendicular to a preset liquid drop bouncing direction, asymmetric Laplace pressure is generated on dripped liquid drops, so that the speed of the liquid drops moving in a preset direction is formed, and meanwhile, directional long-distance bounce transportation of the liquid drops is realizedin combination with the hydrophobic surfaces of the three-dimensional structure units.

Description

technical field [0001] The invention relates to the field of droplet driving, in particular to a thin film that induces directional self-bounce of droplets, a preparation method and application thereof. Background technique [0002] In recent years, there have been more and more studies on materials capable of directional driving droplets, most of which are directional driven under the action of external fields, such as electric fields and magnetic fields. The surface of the spontaneously driven droplet refers to the surface on which the droplet can realize the directional movement of the droplet without relying on external force. Specifically, surface tension can be used to overcome gravity as a tool to guide droplet motion, for example, chemical gradients have been used to drive water droplets uphill, but with typically low velocities. So far, the existing material preparation methods for directional-driven droplets have problems such as complex processing, low resolution...

Claims

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Application Information

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IPC IPC(8): B01J19/00B01L3/00
CPCB01J19/0093B01L3/502707B01L3/50273B01L2400/0403
Inventor 王萌王宁仇明侠杨焕何铁锋张良静江阳光
Owner SHENZHEN TECH UNIV
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