Synergistic effects of nanoparticles and ionic liquids as hybrid lubricant additives

• Autores: Khodor Nasser
• Directores de la Tesis: Josefa Fernández (dir. tes.), Enriqueta R. López Iglesias (dir. tes.)
• Lectura: En la Universidade de Santiago de Compostela ( España ) en 2022
• Idioma: inglés
• Tribunal Calificador de la Tesis: Antolín Esteban Hernández Battez (presid.), María José Pérez Comuñas (secret.), David Emanuel Pimentel Gonçalves (voc.)
• Programa de doctorado: Programa de Doctorado en Ingeniería Termodinámica de Fluidos por la Universidad de Burgos; la Universidad de Santiago de Compostela; la Universidad de Valladolid y la Universidad Rovira i Virgili
• Materias:
  • Física
    • Mecánica
      • Fricción
    • Física del estado sólido
      • Tribología
  • Ciencias tecnológicas
    • Tecnología del carbón y del petróleo
      • Aceite y grasa lubricantes
• Enlaces
  • Tesis en acceso abierto en: MINERVA
• Resumen

  • This Doctoral Thesis presents new designed nanolubricants as potential substitutes of conventional lubricants. Hexagonal boron nitride nanoparticles, graphene nanoplatelets, iron oxide nanoparticles (synthetized from iron mine sludge), three phosphonium ionic liquids and two polyalphaolefin base oils (PAO32 and PAO10) were the materials selected. The techniques used in the characterization of nanoparticles, base oil, ionic liquids, and the worn surfaces from the tribological tests were Raman, SEM, FTIR, HRTEM, XRD or 3D profilometry. Viscosity, density, viscosity index, stability and tribological behavior (friction and wear) of designed nanolubricants were studied. Most of them improved the overall properties of PAO32 40 % reduction in friction and 99 % in wear being stable up to 240 days.