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

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...

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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 droplets and its preparation method and application, aiming at solving the problem that the existing materials are difficult to realize the directional bouncing transport of liquid droplets

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