Surface-modified Sb_2S_3 nanoparticles and their tribological behaviors in liquid paraffin

摘要

Sb_2S_3 nanoparticles surface-modified with S-tetradecyl N, N-dihydroxyethyl dithiocarbamate (C_(14)DTC-Sb_2S_3) have been synthesized via extraction of Sb_2S_3 colloidal particles from ethylene glycol into toluene in the presence of C_(14)DTC. The obtained products were characterized by high-resolution transmission electron microscope (HRTEM) and Fourier transformation infrared (FTIR), and their tribological behaviors as an additive in liquid paraffin were investigated using a four-ball tribometer. The results show that C_(14)DTC-Sb_2S_3 nanoparticles can significantly improve the friction reduction, anti-wear, and load-carrying properties of base oils. The preliminary lubrication mechanism was discussed based on the SEM and XPS investigation of the rubbed surfaces.