Abstract
The effect of surface-modified Ag nanoparticles as additives of multialkylated cyclopentanes (MACs) was investigated in air and vacuum by a vacuum four-ball tribometer. The results showed that both the MACs and MACs containing Ag nanoparticles exhibited steady and low friction coefficients and slight wear in air. However, under vacuum conditions, MACs showed the initial seizure-like high friction, while introducing Ag nanoparticles could effectively eliminate it. Confirmed by the surface analysis, the improved tribological performances caused by Ag nanoparticles could be ascribed to the metal Ag boundary film formed on the friction pair surfaces during tests.
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