表面電位がイオン液体の潤滑特性に与える影響

抄録

Global environmental and energy issues require reduction of carbon dioxide emissions. In machine elements, there is also a need to reduce friction and create lubrication systems suitable for frictional environments. In this study, we focused on ionic liquids, which are expected to be a novel lubricant. Ionic liquids have various characteristics, and we conducted experiments focusing especially on their electrical properties. Since ionic liquids are composed solely of ions, they are susceptible to electrical effects. It is known that the solid-liquid interface structure of ionic liquids changes depending on the surface potential. Therefore, we attempted to manipulate the frictional behavior of ionic liquids by changing the adsorption structure by applying electric potential to the friction surface. The applied potential was determined by measuring the potential window using a cyclic voltammetry test. Then, a constant surface potential was continuously applied, and friction tests were conducted under each condition. This investigation shows that the use of ionic liquids to provide electrical potential reduced the coefficient of friction.