Construction method of double-layer two-dimensional material wettability gradient surface capable of achieving liquid drop self-driving

Abstract

The invention discloses a construction method of a double-layer two-dimensional material wettability gradient surface capable of achieving liquid drop self-driving, and belongs to the technical field of calculation of two-dimensional nano materials. Firstly, a wettability gradient surface numerical model composed of a double-layer two-dimensional material is established; secondly, the boundary of one end of the two-dimensional material serves as a rotating shaft, the lower-layer two-dimensional material is rotated to form a certain tiny angle alpha, and the adhesion energy Wa of the wetting system also changes evenly and continuously along with the interlayer distance d. Finally, the liquid above the solid material can autonomously perform an accelerated movement under the driving of the wetting system adhesion energy Wa. By selecting the double-layer two-dimensional materials with different wettability and adjusting the initial interlayer distance d0 and the rotation angle alpha between the double-layer two-dimensional materials, the real-time regulation and control of the movement speed of the liquid drops are realized. Besides, the self-driven effect of directional transportation of the liquid drops can be observed and investigated in real time by changing calculation parameters of a model in simulation, and a new way is provided for design and preparation of the wettability gradient surface.

Description

technical field [0001] The invention belongs to the technical field of computational two-dimensional nanomaterials, and relates to a method for constructing a double-layer two-dimensional material wettability gradient surface capable of realizing self-driving of droplets. [0002] technical background [0003] Wettable gradient surfaces are widely found in nature, such as on the surfaces of organisms such as pitcher plants, cacti, and desert beetles. For the wettability gradient surface, one of its important applications is to realize the self-driven directional transport of droplets. The related phenomenon has attracted the attention of many domestic and foreign researchers, and has become an important part of removing light, electricity, heat and magnetism, etc. An important way to drive droplets other than the external field drive method. With the deepening of the research on wettability gradient surface, it has shown broad application prospects in many engineering applic...

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Problems solved by technology

However, for most methods, the required material structure is relatively complex, the operation is difficult, the wetting gradient is stepped, and there is no continuous and uniform wetting gradient, and there are problems such as poor applicability and high cost.

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