Effect of Mesogenic Phase and Structure of Liquid Crystals on Tribological Properties as Lubricant Additives

To develop a high-performance additive that can meet different operating conditions, three liquid crystals (LCs) were developed as additives for base oil. The structures and thermal stabilities of the obtained LCs characterized by nuclear magnetic resonance (NMR), Fourier transform infrared (FT-IR) spectroscopy, mass spectroscopy (MS), thermogravimetric analysis (TGA). effects mesogenic-phase temperature ranges on tribological properties analyzed using differential scanning calorimetry (DSC) polarized optical microscopy (POM). UMT-TriboLab friction wear tester was used to study friction-reducing LCs. width marks observed Contour GT-K 3D profiler illustrate anti-wear performance surface electron (SEM) Raman spectroscopy. It demonstrated that, in comparison with oil, addition caused remarkable reduction coefficient (21.57%) (31.82%). In addition, show better abilities ranges. According results, we be lubricant additives, especially several conditions under specific temperatures.