Synthesis, Characterization, and Tribological Behavior of Neopentyl Polyol Ester-Based and Mixed Oil-Based Titanium Complex Grease

Abstract

Four types of titanium complex grease were synthesized using a 3-l reaction vessel, and their friction and wear behavior were evaluated using a four-ball tester in the presence of two base oils: neopentyl polyol ester and a mixture oil of neopentyl polyol ester, 650SN, and epoxidized soy bean oil (4.5:2.5:1), with two compositions: benzoic acid/stearic acid and sebacic acid/stearic acid. The results indicate that mixed oil-based titanium complex grease has excellent tribological properties. Moreover, compositions affect the physical characteristics of titanium complex grease but have little effect on the frictionreduction, antiwear, and load-carrying capability of the same types of oil-based titanium complex grease. In addition, base oils also affect the tribological property of titanium complex grease. Based on scanning electron microscopy and x-ray photoelectron spectrometer of the worn surfaces of steel balls lubricated with the different types of grease, synergistic boundary lubrication was proposed to illustrate the friction-reduction and antiwear properties of titanium complex grease.Keywords Titanium complex grease Á Friction and wear Á Load-carrying capacity Á Scanning electron microscope (SEM) Á X-ray photoelectron spectroscope (XPS)

Tribological properties and tribochemical analysis of nano-cerium oxide and sulfurized isobutene in titanium complex grease

“…Table 4 shows that for the worn surfaces lubricated by base grease (sample #10 in Table 3), base grease containing CeO 2 nanoparticles (sample #5), and base grease containing both CeO 2 nanoparticles and SIB (sample #8), the amount of C and O decreased and the amount of Fe increased strongly after sputtering. Figure 6 and Table 5 confirm this decreased tendency for the C1s relative atomic concentration mainly attributes to carbon bound to oxygen at 286.1, 287.0 and 288.3 eV [10,12,31,32,33]. Furthermore, on the worn surface lubricated by base grease and base grease containing CeO 2 nanoparticles, a very weak peak at 288.3 eV in C1s signal (Fig.…”

“…2 (NLGI grade) consistency. The corresponding drop point of titanium complex grease is exceedingly high attaining to 297 ºC, which is higher than the drop point (about 288 ºC) of titanium complex grease [10]. The maximum non-seizure load (P B ), and weld load (P D ) of titanium complex grease are 530N and 2450N respectively.…”

“…Chen et al [10][11][12] also reported that the benzoic acid-based titanium grease exhibited preferable anti-wear properties and pleasurable load-carrying capacity. It was believed that the improvements were due to titanic chemical films forming on and protecting the rubbing surface of the steel ball.…”

Synthesis of polyphenylmethylsiloxanes and their enhancement on tribological properties of titanium complex grease

“…To improve the tribological properties of titanium complex grease, additives are commonly used in the grease . When a mixture of neopentyl polyol ester and mineral oil was used as the mixed base oil, the anti‐wear property and load‐carrying capability of titanium complex grease could be improved …”

Comparative study on corrosion resistance and lubrication function of lithium complex grease and polyurea grease

“…As a semi-solid colloidal dispersion system, lubricating grease has been widely applied to many fields owing to its excellent friction-reducing and anti-wear properties. Grease contains two main components: base oil as a fluid lubricant and thickener for thickening the base oil to a certain consistency [9]. The properties of base oil and thickener mainly determine the physicochemical property and usability of grease.…”