Low friction of superslippery and superlubricity: A review

Abstract

The issues regarding energy dissipation and component damage caused by the interface friction between a friction pair attract enormous attention to friction reduction. The key-enabling technique to realize friction reduction is the use of lubricants. The lubricants smooth the contact interfaces, achieving an ultralow friction contact, which is called superslippery or superlubricity. At present, superslippery and superlubricity are two isolated research topics. There is a lack of unified definition on superslippery and superlubricity from the viewpoint of tribology. Herein, this review aims at exploring the differences and relations between superslippery and superlubricity from their origin and application scenarios. Meanwhile, the challenges for developing superslippery surface and superlubricity surface are discussed. In addition, perspectives on the interactive development of these two surfaces are presented. We hope that our discussion can provide guidance for designing superslippery or superlubricity surfaces by using varies drag-reduction technologies.

Slippery Porous‐Liquid‐Infused Porous Surface (SPIPS) with On‐Demand Responsive Switching between “Defensive” and “Offensive” Antifouling Modes

“…[ 41–43 ] Although SLIPS are capable of self‐replenishing surface lubricants, [ 44 ] a “gap period” exists before the replenishment during which the SLIPS are prone to biofouling owing to the decrease in surface lubricity. [ 45,46 ] Hence, long‐term antifouling effects cannot be achieved. [ 37 ]…”

Recent Developments in Slippery Liquid-Infused Porous Surface Coatings for Biomedical Applications

“…In addition, photolithography can achieve controllable anisotropic etching to prepare highly ordered structures. This method can be used to build various microstructures such as squared pillars, , cylindrical posts, , ridges, cylindrical pores, and inverted-pyramidal cavities . offers several advantages over conventional SLIPS fabrication techniques, which typically involve the deposition or coating of porous layers made from foreign materials onto substrates.…”

Fabrication of Zwitterionic Polymer-Functionalized Onion-like Carbon Nanoparticles as Aqueous Lubricant Additives

“…According to statistics in the world, about one-third of the energy is consumed in various forms of friction, and about 80% of machine parts fail because of wear. − The utilization of lubricants is an effective measure that can effectively reduce friction and wear as well as the consumption of energy resources. At present, the most simple and effective lubricants used in industry are mainly liquid lubricants. , Compared to oil-based lubricants, water-based lubricants have been widely researched and applied in bearing, hydraulic transmission, biomedical, and other areas due to their advantages of being nontoxic, environmental friendliness, low cost, wide range of sources, being noncombustible, and good cooling properties. − However, the shortcomings of low viscosity, poor load-bearing capacity, and strong corrosiveness of water largely limit the development of aqueous lubrication .…”