The effectiveness of PTFE nanoparticle powder as an EP additive to mineral base oils

Effect of the size and morphology of particles dispersed in nano-oil on friction performance between rotating discs

“…In order to prepare a nano-oil with dispersion stability, alkyl-aryl sulfonate ( ) was added to the mixture of nanoparticles and base lubricant at a surfactant : nanoparticles of 0.3 : 1 by weight, and sonicated with an ultrasonic homogenizer (SMT Company, UH-600S, 600W, 20 kHz) for 2 h. The nanoparticle surfaces were modified by the surfactant, which induced repulsive forces between nanoparticles suspended in the lubricant [3,5]. Table 1 summarizes all the nano lubricants tested in this study.…”

“…Various types of nanoparticles were used to prepare nano lubricants, including polymers, metals, and organic and inorganic materials [2][3][4][5][6][7][8][9]. Rico et al [3] evaluated the extreme pressure and wear reduction properties of nano lubricants using polytetrafluoroethene (PTFE) nanoparticles in two different types of mineral oil with a kinematic viscosity of 70 mm 2 /s and 500 mm 2 /s at 40°C, respectively. The nano lubricants containing the PTFE nanoparticles provided better lubrication characteristics due to the shock-absorbing and reducing contact between the frictional surfaces.…”

Tribological Properties of Polytetrafluoroethylene, Nano-Titanium Dioxide, and Nano-Silicon Dioxide as Additives in Mixed Oil-Based Titanium Complex Grease

“…The reason for this occurrence could be that, at the load of 400 N, the titanium complex grease containing PTFE or nano-silicon dioxide can be adsorbed on the rubbed surface to form good adsorptive film. PTFE particles have a shockabsorbing effect [15], and adsorbed base grease nano-silicon dioxide particles help keep the surfaces apart [16], comparable to that formed under base grease lubrication. Therefore, the tribological performance is good.…”

Tribological properties of polymer-based journal bearings

“…Hu [6], Davim and Marques [7], Tevrüz [10][11][12], Bahadur and Tabor [15], Lancester et al [16], Briscoe [17], Gong et al [18], Blanchet et al [19], Rajesh and Bijwe [24], and Rico et al [25] have investigated tribological properties of polymer-based various PE, PA, PEEK and PTFE materials. In these studies, they reported that the wear rate increased with increasing applied load and sliding distance, and wear and hardness properties improved with particle reinforcement.…”

“…They observed that less abrasive and adhesive wear tracks in particle reinforced composites. Rajesh and Bijwe [24], and Rico et al [25] reported that some fillers materials could effectively increase the wear life of polymer-based PA and PTFE composites. Particle filled composites showed much smoother surfaces than the same composites filled by graphite.…”