High Wear Resistance of POSS Grafted-Polyimide/Silica Composites under Atomic Oxygen Conditions.

ABSTRACT: Polyimide-bearing retainer has been successfully used in space environment. However, the structural damage of polyimide induced by space irradiation limits its wide use. In order to further improve the atomic oxygen resistance of polyimide and comprehensively investigate the tribological mechanism of polyimide composites exposed in simulate space environment, 3-amino-polyhedral oligomeric silsesquioxane (NH₂-POSS) was incorporated into a polyimide molecular chain and silica (SiO₂) nanoparticles were in situ added into polyimide matrix and the combined effect of vacuum environment, and atomic oxygen (AO) on the tribological performance of polyimide was studied using bearing steel as the counterpart by a ball on disk tribometer. XPS analysis demonstrated the formation o

SUBMITTER: Qi H 

PROVIDER: S-EPMC10223808 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature