Abstract
Different layers of MoS2 were grown on the surface of carbon nanotubes (CNTs) successfully with a facile and effective chemical vapor deposition method. The pristine CNTs (PCNTs) were pretreated with 5 mol L–1 HNO3, 10 mol L–1 HNO3, and mixed acid (sulfuric acid/nitric acid = 3:1) to obtain weakly oxidized CNTs (WOCNTs), moderately oxidized CNTs (MOCNTs), and strongly oxidized CNTs (SOCNTs). According to the results of SEM, EDS, TEM, Raman, XRD, and XPS, more layers of MoS2 were grown on the surface of SOCNTs uniformly due to the abundant defects on its surface. The friction-reducing and antiwear performance of dibutyl phthalate (DBP) containing SOCNTs, MoS2, SOCNTs/MoS2 mixture, and SOCNTs@MoS2 composite were investigated under 392 N and 1200 rpm at room temperature by four-ball tribotester. The DBP containing 0.02 wt % SOCNTs@MoS2 composite exhibited the best tribological performance, and the friction coefficient and wear scar diameter (WSD) were reduced by 57.93% and 19.08%, respectively. The synergist...
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