Preparation and Tribological Behavior of Silica Nano-Additives with Good Applicability for Both Polar and Non-Polar Base Oils.

Dodecenylsuccinic anhydride was used as a surface modifier to further modify amino-functionalized silica nanoparticles, and the modified nanoparticles (RNS-1A-DDSA) showed good dispersion stability in both nonpolar PAO6 and polar DIOS base oils. The tribological properties of RNS-1A-DDSA were evaluated using an oscillating reciprocal friction and wear tester (SRV-5), and it was found to exhibit excellent tribological properties in both base oils with different polarities. EDS and SEM were used to characterize the wear surfaces, and combined with the results of AFM and QCM adsorption experiments, the reason for the applicability of RNS-1A-DDSA in both polar and non-polar base oils was deduced. [ABSTRACT FROM AUTHOR]