Characterization of electrodeposited porous structured composite layers and their unconventional wettability properties

Abstract

At present, there has been some progress in the surface preparation technology of 3D structures. The hydrogen bubble template method is a common technology to develop functional coatings. The three-dimensional porous materials prepared by the hydrogen bubble template method have the characteristics of low preparation cost, excellent performance, and mass production. Although this structure has the above-mentioned advantages, the research on it is usually limited to the application under certain conditions. In this paper, a series of porous coatings were prepared by a special method. The results show that when the current is low, it does not form pores after deposition; when the current is high, a distinct layered structure is produced. By introducing the concepts of top-layer pores and sub-layer pores, the change law of structure with layers is further analyzed, and two types of merging methods of holes are described. Moreover, in this paper, the semi-empirical equation of pore area versus current is derived after simplifying the model. The wettability application results show that the maximum contact angle of the surface is 140.635°, and the wettability of some surfaces changes from hydrophobic to hydrophilic with time. In addition, an idea for continuous and large-scale production of nano-coated heat sinks is designed. In this way, basic research can be combined with production.