Publication: Stability and tribological performance of dispersed graphene (gr) and aluminium nitride (aln) nanoparticles in mineral oil
| datacite.subject.fos | oecd::Engineering and technology::Mechanical engineering::Aerospace engineering | |
| dc.contributor.author | Ku Wadzer, Ku Nooryasmin | |
| dc.date.accessioned | 2024-11-27T09:10:15Z | |
| dc.date.available | 2024-11-27T09:10:15Z | |
| dc.date.issued | 2024-08-01 | |
| dc.description.abstract | Additional nanoparticles often agglomerate and are incompatible with base fluids. With time, the mixed nanoparticles would phase-separate from the fluids, losing the benefits of aggregated nanofluids. Thus, this work examines the stability, thermal conductivity (TC), rheology, and tribology of graphene (GR) and alumnium nitride (AlN) in SUNISO 3GS refrigerant lubricant (compressor oil) and PETRONAS SYNTIUM 500 (engine oil). The study determines the best nanolubricant surfactant, the optimum concentration of GR and AlN nanoparticles in SUNISO 3GS and Engine oil 15W-40 nanolubricant, and their rheological and tribological properties. Nanolubricants' stability has been examined by visual observation and UV-vis spectrum intensity. Thermal conductivity has also been measured by changing volume percentage and surfactant presence. The highest percentage difference for TC is 22.58 in comparison with pure compressor oil. Viscosity readings at various temperatures, the ASTM 2270 standard for viscosity index measurement, and flash point were used to estimate rheological parameters. Tribological characteristics were measured using a pin-on disc tribotester to quantify wear rate according to ASTMG99. This study revealed that CTAB is the best surfactant for GR and SPAN80 is the best surfactant for AlN for both compressor oil (CO) and engine oil (EO). Next, the samples with 0.1 vol% with surfactant for both oils have the best stability and highest thermal conductivity. Furthermore, based on rheology performances, GR(0.05)-EO(CT), AlN(0.1)-EO(SP), GR(0.05)-CO(CT) and GR(0.1)-CO have the best performance. Moreover, addition of surfactant proves that it can improve the tribological performance where GR with 0.05 vol% with CTAB for both CO and EO shows the best tribological performance. Lastly, by using pin-on disc tribotester, it can be observed surfactant in nanolubricants reducing the specific wear rate (SWR) and the highest percentage difference is high as 76.37% for nanolubricant. | |
| dc.identifier.uri | https://erepo.usm.my/handle/123456789/20822 | |
| dc.language.iso | en | |
| dc.title | Stability and tribological performance of dispersed graphene (gr) and aluminium nitride (aln) nanoparticles in mineral oil | |
| dc.type | Resource Types::text::thesis::master thesis | |
| dspace.entity.type | Publication | |
| oairecerif.author.affiliation | Universiti Sains Malaysia |