RT Journal Article
T1 Tribological and Rheological Characterization of New Completely Biogenic Lubricating Greases : A Comparative Experimental Investigation
A1 Acar, Nazli
A1 Kuhn, Erik
A1 Franco Gómez, José María
AB Against the background of raw material shortage and the ever-expanding environmentalconsciousness, the use of biodegradable greases becomes more and more important. The aim of thisexperimental work is to investigate the tribological response of completely biodegradable greases.Complete biodegradable lubricating greases were formulated with high-oleic sunflower oil (HOSO)and/or castor oil, and different biodegradable thickener agents such as natural cellulose fibers ofdifferent lengths and some derivatives, as well as glyceryl and sorbitan stearates. To investigate thefriction process, the model greases were tribologically examined with a nanotribometer at a normalforce of 200 mN using a material combination of a steel ball on a steel disc. All frictional results,along with the volumes of wear tracks and micrographs of the main contacting area on the steel plate,are presented and discussed. In addition to this, rotational transient flow measurements were carriedout on a rheometer at different temperatures to monitor the evolution of the shear stress with timeat a constant shear rate, and to characterize the internal friction behavior by quantifying the energydensity. All results were also analyzed from an energetic point of view.
PB MDPI
SN 2075-4442
YR 2018
FD 2018
LK http://hdl.handle.net/10272/14810
UL http://hdl.handle.net/10272/14810
LA eng
NO Acar, N., Kuhn, E., Franco Gómez, J.M.: "Tribological and Rheological Characterization of New Completely Biogenic Lubricating Greases : A Comparative Experimental Investigation". Lubricants. Vol. 6, n. 2, (2018):  https://doi.org/10.3390/lubricants6020045
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026