Rheological properties of TiO2/POE nanolubricant for automotive air conditioning system

• Main Authors: Khamisa, Abdul Hamid, Wan Azmi, Wan Hamzah, Mohd Yusof, Taib, Mohd Farid, Ismail, Anwar Ilmar, Ramadhan
• Format: Article
• Language: English
• Published: Penerbit Akademia Baru 2022
• Subjects: T Technology (General); TA Engineering (General). Civil engineering (General); TJ Mechanical engineering and machinery
• Online Access: http://umpir.ump.edu.my/id/eprint/33358/1/Rheological%20properties%20of%20TiO2_POE%20nanolubricant%20for%20automotive%20air%20conditioning%20system.pdf; http://umpir.ump.edu.my/id/eprint/33358/; https://doi.org/10.37934/arfmts.90.1.1022; https://doi.org/10.37934/arfmts.90.1.1022

The enhancement of nanolubricant rheological properties can improve the performance of automotive air-conditioning systems. The rheological properties of the TiO2/POE nanolubricant were investigated in this study at 0.01 to 0.1% volume concentrations and temperatures ranging from 0 to 100°C. TiO2 nanoparticles were dispersed in the base lubricant of Polyol-ester (POE RL68H) lubricant in two steps. The dynamic viscosity was measured with an Anton-Paar Rotational Rheometer. According to the findings, the TiO2/POE nanolubricant behaved as Newtonian fluids at all volume concentrations and temperatures. The dynamic viscosity increment of nanolubricants up to 1.75% only occurred for 0.1% volume concentration and temperature of 90 to 100°C. Meanwhile, when compared to POE lubricant, nanolubricants with volume concentrations of 0.01 and 0.05% showed a decrement trend in dynamic viscosity of up to 1.8%. Finally, the TiO2/POE nanolubricant improved the rheological properties of the POE lubricant for use in automotive air-conditioning systems.