Synthesis of Hyper-Dispersant Based on the Application of Nano-Lubricants

Abstract

A new type of hyper-dispersant was designed and successfully synthesized by free radical solution polymerization method to improve the dispersing performance of nano-copper in base oil. The microstructures of the product were characterized by means of x-ray diffraction (XRD), Fourier transformation infrared spectrometry (FTIR), and transmission electron microscopy (TEM). The hyper-dispersant as modifier was chemically bonded to nano-copper via strong chemical interaction. The influences of nano-copper modified by hyper-dispersant on the lipophilic degree and wettability were investigated. It was found that the modified nano-copper had the best dispersion performance in base oil, and the optimum amount of hyper-dispersant was 8 wt%. The tribological behavior showed that modified copper nanoparticles possessed excellent friction-reduction and antiwear properties. Meanwhile, the extreme pressure property of the base oil was also improved strikingly. And the maximum non-seizure load (PB) of base oil was improved by 27% at the point of 0.1 wt%.