1. Nano (Tube/Rod) Additives in Engine Oil
% decrease after additives
50
ASTM D4172
(Ducom Four Ball Tester; TR-30L)
40
MWCNT (Ref 1)
TR-30L can report and distinguish the
friction response by nano rods and
nano tubes (5 to 18 nm dia) in
boundary and mixed lubrication
regimes.
30
CuO Nanorods (Ref 2)
20
10
0
Tubes or Rods acts like ROLLER
BEARING ELEMENTS in Boundary
Lubrication Conditions !
Friction Coefficient
Wear Scar Diameter
• Novelty: Application of HMIM-oAc ionic liquid to tune the aspect ratio of CuO nanorods
• Higher aspect ratio of nanorods show lowest friction coefficient and wear scar diameter
CuO Nanorods are better than MWCNT?
• Better dispersion and stability of CuO nanorods?
• Higher shear strength and thermal conductivity of CuO nanorods?
• Lubrication due to transfer of Cu nanofilms to the interface?
Ref 1: Ducom Application Center, Nanolubricants, April 2013
Ref 2: Gusian and Khatri, J. Mater. Chem. A, 2013, 1, 5612