Abstract
In the future, eco-friendly type and circular type machines are expected to appear and play an active role in our daily lives. These machines will require unconventional design guidelines. One example is the use of biodegradable liquid lubricants. On the other side, in recent years, active friction control methods have been actively developed. One example is the use of external electric fields. In this study, a new friction control method was developed by combining biodegradable liquid lubricants, and the application of an external electric field. We used propylene glycol as a liquid lubricant and conducted friction tests between SUJ2 balls and acrylic resin while applying an electric field. As a result, it was observed that the external electric field lowered the friction coefficient during sliding. In addition, as a result of changing the pH of the liquid, it was observed that the friction reduction effect during the application of an electric field increased as the pH was reduced and the liquid became more acidic.
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