Wu, HuiJiang, ZhengyiAlqarni، Ali2024-12-152024Alqarni, A. (2024). Tribological Study on Water-Based Lubricants Containing Nanocomposite of Hexagonal Boron Nitride (h-BN) & Titanium Dioxide (Tio2). Master's dissertation. University of Wollongong.https://hdl.handle.net/20.500.14154/74219This dissertation explores advanced lubrication solutions through the development of water-based lubricants enhanced with Hexagonal Boron Nitride (h-BN) and Titanium Dioxide (TiO2) nanocomposites. The study focuses on tribological performance, including significant friction reduction, enhanced wear resistance, and environmental sustainability. By leveraging nanotechnology, this research investigates the synthesis, characterization, and dispersion stability of h-BN and TiO2 nanocomposites in water-based mediums. The findings demonstrate up to 89.2% friction reduction and 86% wear reduction at optimal nanoparticle concentrations. The study addresses the challenges of scaling up production while maintaining long-term nanoparticle dispersion stability. It also highlights the environmental and economic benefits of eco-friendly lubricants compared to traditional oil-based alternatives. These innovations support green manufacturing practices, offering a sustainable and efficient solution for mechanical systems, energy efficiency, and reduced maintenance in various industrial applications. This work positions h-BN/TiO2 nanocomposite lubricants as a transformative approach in the tribology field, aligning with sustainability goals and advancing lubrication technology.This study explores the potential of water-based lubricants enhanced with Hexagonal Boron Nitride (h-BN) and Titanium dioxide (TiO2) nanocomposites to improve tribological performance, reduce environmental impact, and offer economic advantages. The investigation highlights the significant reduction in friction and wear achieved through the integration of these nanoparticles, with an optimal concentration of 0.25 wt% h-BN and TiO2 resulting in the lowest average coefficient of friction (COF) of 0.0467, compared to 0.433 for dry conditions and 0.3135 for distilled water. This represents a friction reduction of up to 89.2% and a wear area reduction of up to 86%. This study explores the potential of water-based lubricants enhanced with h-BN and TiO2 nanocomposites to improve tribological performance, reduce environmental impact, and offer economic advantages. The investigation highlights the significant reduction in friction and wear achieved through the integration of these nanoparticles, with an optimal concentration of 0.25 wt% h-BN and TiO2 resulting in the lowest average coefficient of friction (COF) of 0.0467, compared to 0.433 for dry conditions and 0.3135 for distilled water. This represents a friction reduction of up to 89.2% and a wear area reduction of up to 86%. The study also addresses technical challenges in scaling up production while maintaining nanoparticle dispersion stability and long-term performance. Future research directions include longitudinal studies on stability, optimisation of nanoparticle concentrations, and comprehensive environmental and economic lifecycle analyses. The integration of h-BN and TiO2 nanocomposites in lubrication technology promises to enhance energy efficiency, reduce maintenance and downtime, and align with sustainability goals, positioning these advanced lubricants as a transformative solution for the tribology field and related industries.67enTribologyWater-based lubricantsHexagonal Boron Nitride (h-BN)Titanium Dioxide (TiO2)NanocompositesFriction reductionWear resistanceEnvironmental sustainabilityEco-friendly lubricationNano-additivesDispersion stabilityTribological performanceSustainable engineeringMechanical systems lubricationRheological propertiesGreen manufacturingNanoparticle synthesisAnti-friction and wear propertiesThermal stability of lubricantsLubrication technology innovationEnergy efficiency in tribologyEnvironmental and economic implicationsThesis