Multifunction of Biomimetic Liquid Infused Systems Derived from SLIPS Theory: A Review

Slippery liquid infused porous surface (SLIPS) inspired by the microstructure of carnivorous Nepenthes has the potential to be used in a wide range of fields, including nautical, industrial, medical, etc. Due to their excellent optical transparency, self-healing after mechanical injury and controllable wetting properties, SLIPS has attracted extensive research interest. With appropriate lubricants, sufficient performance will be armed to the surface so as to adapt for further requirements. In this review, the first part focuses on the basic theory of the different wettable models explaining the physical phenomena of these surfaces and their wettability. Then various representative fabrication methods are listed such as lithography, layer-by-layer assembly, and electrochemical anodic oxidation. There are three steps including in the process of SLIPS preparation:fabrication of rough substrate, chemical modification of rough substrate and infusion of low surface energy lubricating oil. Furthermore, recent applications and researches of SLIPS are introduced, mainly about drag reduction, anticorrosion, anti-icing, medical treatment, and droplet manipulation. Finally, make a prospection to the limitations of practical application and future development direction of the technology.