Acquisition of molecular rolling lubrication by self-curling of graphite nanosheet at cryogenic temperature.

ABSTRACT: Friction as a fundamental physical phenomenon dominates nature and human civilization, among which the achievement of molecular rolling lubrication is desired to bring another breakthrough, like the macroscale design of wheel. Herein, an edge self-curling nanodeformation phenomenon of graphite nanosheets (GNSs) at cryogenic temperature is found, which is then used to promote the formation of graphite nanorollers in friction process towards molecular rolling lubrication. The observation of parallel nanorollers at the friction interface give the experimental evidence for the occurrence of molecular rolling lubrication, and the graphite exhibits abnormal lubrication performance in vacuum with ultra-low friction and wear at macroscale. The molecular rolling lubrication mechanism is elucidated

SUBMITTER: Li P 

PROVIDER: S-EPMC11233547 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature