Synergistic effects of nanoparticles and ionic liquids as hybrid lubricant additives

  1. Nasser, Khodor
unter der Leitung von:
  1. Josefa Fernández Doktormutter
  2. Enriqueta R. López Iglesias Doktormutter

Universität der Verteidigung: Universidade de Santiago de Compostela

Fecha de defensa: 29 von April von 2022

Gericht:
  1. Antolín Esteban Hernández Battez Präsident/in
  2. María José Pérez Comuñas Sekretärin
  3. David Emanuel Pimentel Gonçalves Vocal
Fachbereiche:
  1. Departamento de Física Aplicada

Art: Dissertation

Teseo: 720935 DIALNET lock_openMINERVA editor

Zusammenfassung

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.