• 1 Faculty of Engineering Technology Mechanical and Automotive, Universiti Malaysia Pahang, 26600 Pekan, Pahang, Malaysia
  • 2 School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup WA 6027, Australia
  • 3 College of Engineering, Mechanical department, Universiti Malaysia Pahang, 26600 Pekan, Pahang, Malaysia
  • 4 Research Center for Nano-Materials and Energy Technology (RCNMET), School of Science and Technology, Sunway University, Bandar Sunway, 47500 Petaling Jaya, Selangor, Malaysia
Molecules, 2020 Jun 28;25(13).
PMID: 32605301 DOI: 10.3390/molecules25132975


Friction and wear are the main factors in the failure of the piston in automobile engines. The objective of this work was to improve the tribological behaviour and lubricant properties using hybrid Cellulose Nanocrystal (CNC) and Copper (II) oxide nanoparticles blended with SAE 40 as a base fluid. The two-step method was used in the hybrid nanofluid preparation. Three different concentrations were prepared in a range of 0.1% to 0.5%. Kinematic viscosity and viscosity index were also identified. The friction and wear behavior were evaluated using a tribometer based on ASTM G181. The CNC-CuO nano lubricant shows a significant improvement in term of viscosity index by 44.3-47.12% while for friction, the coefficient of friction (COF) decreases by 1.5%, respectively, during high and low-speed loads (boundary regime), and 30.95% during a high-speed, and low load (mixed regime). The wear morphologies results also show that a smoother surface was obtained after using CNC-CuO nano lubricant compared to SAE 40.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.