水およびPAOに分散した木材由来ナノカーボンの摩擦特性

抄録

Wood-derived nanocarbons (WNCs) were synthesized from wood powders by metal-catalyzed carbonization. Moreover WNCs were oxidized by a modified Hummer's method in order to introduce WNCs to oxygen functional groups which enhance them to adsorb on metal surfaces. The oxidized WNCs (oWNCs) were easy to be dispersed in water, and the oWNC dispersion in water showed a very low friction coefficient of less than 0.05 using steel plates and tungsten carbide (WC) balls with a load of 1.8 N. Wear in the friction tests was also found to be low due to formation of triboflims. The oWNCs were also dispersed in poly-alpha- olefin (PAO) and tribological property of the oWNC dispersion in PAO was investigated.