Publisher DOI: 10.3390/lubricants3030611
Title: Influence of base oil polarity on the transient shear flow of biodegradable lubricating greases
Language: English
Authors: Fiedler, Martin 
Sánchez, Rubén 
Valencia, Concepción 
Leopold, Claudia S. 
Kuhn, Erik 
Franco, José M. 
Editor: Krzanowski, James 
Keywords: AFM; Biodegradable lubricating greases; Oil polarity; Rheology; Transient flow
Issue Date: 9-Sep-2015
Publisher: MDPI
Journal or Series Name: Lubricants : open access journal 
Volume: 3
Issue: 3
Startpage: 611
Endpage: 627
Abstract: 
The scope of this study is to elucidate the physical mechanisms influencing the transient flow behavior of lubricating greases based on biogenic oleochemicals from a polarity point of view. This includes the mutually interacting influence of base oil polarity and thickening agents on the rheologically-measured mechanical structural degradation in transient shear flow. Due to the high temperature dependence of Keesom forces in the background of polar-active bond mechanisms, the analysis of the transient flow response as a function of temperature allows to attribute the observed influences to differences in base oil polarity. In general, clay-thickened greases show a greater tendency to be rheologically influenced by base oil polarities than soap-thickened lubricating greases.
URI: http://hdl.handle.net/20.500.12738/14054
ISSN: 2075-4442
Review status: This version was peer reviewed (peer review)
Institute: Department Maschinenbau und Produktion 
Fakultät Technik und Informatik 
Type: Article
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