RT Journal Article
T1 Thermophysical properties of polyalphaolefin oil modified with nanoadditives
A1 García Guimarey, María Jesús
A1 Pérez Comuñas, María José
A1 López Iglesias, Enriqueta
A1 Amigo Pombo, Alfredo José
A1 Fernández Pérez, Josefa
K1 Lubrican
K1 ZrO2 and boron nitride nanoparticles
K1 Graphene nanoplatelets
K1 Thermophysical properties
AB This article presents an experimental investigation on the effects of concentration and morphology of nanoadditives on the thermophysical properties of nanolubricants (NLs) at different temperatures. A polyalphaolefin (PAO6) oil was used as base fluid. A two-step method was used to prepare the NLs. Zirconium oxide (ZrO2) and boron nitride (BN) nanoparticles (NPs) and graphene nanoplatelets (GnP) were separately dispersed in the base fluid with mole fraction ranging from 0.05 wt% to 2 wt%. The NPs and GnP were characterized by X-ray diffraction, Raman spectroscopy and electron microscopy.The base oil was also analysed by mass spectrometry. Visual sedimentation, temporal variation of refractive index and Fourier transform infrared spectroscopy were used to analyze the stability of the nanolubricants and the existence of new interactions between nanoparticles and base oils. Detailed study was carried out to analyse the effect of nanoadditives on viscosity, density and adiabatic bulk modulus.Moreover, different predictive equations to estimate termophysical properties were tested using the experimental values. Pressure-viscosity coefficients as a function of the temperature and nanoparticle concentration were predicted for all the nanolubricants.
PB Elsevier
SN 0021-9614
YR 2018
FD 2018-11-01
LK http://hdl.handle.net/10347/32096
UL http://hdl.handle.net/10347/32096
LA eng
NO This work was supported by both the Spanish Ministry of Economy and Competitiveness and the UE FEDER programme through ENE2014-55489-C2-1-R and ENE2017-86425-C2-2-R projects. Moreover, this work was funded by the Xunta de Galicia and UE FEDER (GRC ED431C 2016/001). Authors would like to thank the use of RIAIDT-USC analytical facilities.
DS Minerva
RD 28 abr 2026