Study On The Regulation Of Interfacial Solid/Liquid Interaction Based On 3D Printing Structure

After millions of years of selection,some animals and plants in nature have evolved to form functional interfaces with special wettability.Liquids exhibit special properties on these surfaces with wettability.By bionic these animals and plants,a series of functions can be realized by regulating the interaction between liquid and the wettable surface.The 3D printing technology that has been emerging in recent years can quickly and accurately manufacture structures with complex features and a wide range of sizes.While mimicking the chemical properties of biological interfaces,it can also regulate the 3D structures.In this paper,from the perspective of bionics,combined with 3D printing technology,the mesh that can realize liquid unidirectional transport and floating superhydrophobic folding plate are prepared,details as follows:1.Preparation of integrated mesh with anisotropic slippery tracks and its application in the study of liquid unidirectional transport.Liquid directional transport has important applications in the fields of printing,microfluidics,oil-water separation,and water collection.Inspired by the anisotropic rice leaf and the slippery Pitcher plant,an integrated mesh with orthogonal anisotropic slippery tracks(IMOAS)is presented here that can realize unidirectional droplet penetration.Compared with the previous devices that rely on the asymmetric Janus structure to achieve unidirectional liquid manipulation,IMOAS can realize the conversion between droplet slipping mode and penetrating mode only by adjusting the relative position of the horizontal track and downhill track.For any wettability gradient/contrast,a new class of 3D liquid unidirectional transport has been developed using a combination of 2D anisotropic interfaces.2.Preparation of superhydrophobic folding plate and its use in floating performance research.The study of the floating performance of objects has important applications in the preparation of new types of drag reduction devices and the cleaning of oil pollution on the water surface.Inspired by water striders,combined with 3D printing technology,a 3D PLA superhydrophobic folding plate was prepared.Compared with the PLA superhydrophobic sheet which can float on the water surface,the PLA superhydrophobic folding plate can not only float on the water surface but also re-float to the water surface after being submerged in the water.That is,by simply upgrading the 2D sheet to a 3D folding plate,the folding plate has the floatable property and the sink resistance at the same time.This method is also applicable to metal folding plates,thereby expanding metal-based floatable materials from 1D metal wires and 2D metal sheets to 3D metal structures.The floating properties and anti-sinking properties of the 3D superhydrophobic structure have opened up a new way for the application of artificially prepared superhydrophobic surfaces in aquatic biological devices.