The slippery liquid infused porous surfaces (SLIPS) with employing pitcher plants as a biomimetic prototype are ultra-smooth surfaces formed by injecting lubricants into rough porous structures with low surface energy. Owing to the excellent barrier effect, the SLIPS lubricating layer has a good application prospect in the field of metal corrosion protection. In this work, the construction mechanism of SLIPS was introduced, and the preparation methods of SLIPS on metal surfaces were summarized from three aspects: direct substrate structuring, in-situ growth and coating treatment. The anti-corrosion applications of SLIPS on four different metal surfaces of aluminum, copper, magnesium and steel were reviewed. Furthermore, the shortcomings of SLIPS materials used in metal anti-corrosion were pointed out, and its development trend was prospected.

Wettability of the material surface is extremely important for the separation of mixtures/emulsions (e.g. oil and water or conversely water and oil). The development of superwetting materials has shown great potential for recovering water from oil-water emulsions and provide maximum anti-fouling properties. In industrial production process, the oil and natural gas industry continuously produces large amounts of wastewater, the wastewater is discharged in water and lead to water pollution, which has seriously affected the development of human society. Therefore, there is an urgent need for an efficient technology to treat the oily wastewater generated from industrial production processes. Among various separation technologies, membrane-based separation techniques have been used to separate oil-water mixtures/emulsions in oily wastewater. In this paper, the properties of wettable materials and their relevant applications in the field of oily wastewater treatment were systematically described in terms of hydrophilicity, hydrophobicity and superwettability. The different roles of wettability modification in the treatment of oily wastewater were summarized. Finally, the importance, challenges and future prospects of wettability modification were pointed out, which would provide necessary guidance for the selection and design of wettability modification, and provide support for the further applications and development in oily wastewater treatment.

Corrosion failure is the bottleneck for restricting the application and development of copper-based metal materials. As a new technology of improving corrosion resistance, superhydrophobic surface provides an effective way to solve the problem of copper corrosion. In this work, the superhydrophobic copper surface was prepared by wire electrical discharge machining (WEDM) and surface modification with stearic acid. Subsequently, scanning electron microscope was used to observe the surface micro morphology, video optical contact angle meter was used to measure the wettability, and the corrosion behavior was further tested through the electrochemical workstation. Results showed that the micron strip nano stalactite graded composite structure on the copper surface had been successfully prepared, and the surface of the composite structure exihibited excellent superhydrophobic properties. In addition, compared with the substrate, the corrosion resistance of the prepared surface was increased by 99.35%. The corrosion prevention mechanism of the superhydrophobic surface was systematically studied and analyzed, and it was found that the formation of micro nano composite structure could effectively capture air to form a solid gas liquid interface on the surface of the sample, and the existence of the air layer further impeded the electron transfer and material transfer rate between the substrate and the electrolyte. Thereby, the electrochemical corrosion rate of the substrate was inhibited, and the corrosion resistance of the superhydrophobic copper sample was significantly improved. Overall, the method was simple, efficient and widely used, and the preparation process was environmentally friendly, which could be applied to large-scale production.

With the continuous development of industry, it is urgent to treat oily sewage to achieve resource recovery and utilization. For oily sewage, superwetting materials have become one of the most promising materials for treating oily sewage, owing to their high separation efficiency and low energy consumption. Among various treatment methods, the membrane separation method becomes one of the most popular treatment methods in the future because of its low energy consumption and environmental protection. In this work, the basic theory of membrane surface wettability and the preparation method of superhydrophobic surfaces was reviewed, and the research status of the use of superwetting membrane materials for the treatment of various types of oily sewage was further elaborated. At last, the prospects for those future development trends were forecasted.

In order to study the freezing process of dynamic water droplets on the surface of anti-icing coatings, a fluorine based self-assembled superhydrophobic coating was prepared on the surface of 7075 aluminum alloy substrate. The variation of the capture rate of dynamic water droplets on the coating surface with the duration of low temperature, surface inclination, and surface temperature was analyzed, and the anti-icing performance of the superhydrophobic coating was further explored. Results showed that the capture rate of water droplets on superhydrophobic surfaces decreased with the prolongation of low temperature duration and the increase of surface inclination angle, and increased with the decrease of surface temperature. At -20 ℃, with a low temperature duration not exceeding 7 min, the superhydrophobic surface could delay the growth rate of ice layers, and the shorter the low temperature duration, the more significant the inhibitory effect of superhydrophobic surfaces on ice layer growth. Besides, in the case of the same duration of low temperature, the smaller the surface inclination, the lower the surface temperature, and the more obvious the inhibitory effect of superhydrophobic surface on ice layer growth.