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3 results on '"biodegradable lubricating greases"'

1. Influence of Base Oil Polarity on the Transient Shear Flow of Biodegradable Lubricating Greases

Author

Martin Fiedler, Rubén Sánchez, Concepción Valencia, Claudia S. Leopold, Erik Kuhn, and José M. Franco

Subjects
biodegradable lubricating greases, AFM, oil polarity, rheology, transient flow, Science
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.

Published
2015
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2. Influence of Base Oil Polarity on the Transient Shear Flow of Biodegradable Lubricating Greases

Author

José M. Franco, Rubén Sánchez, Claudia S. Leopold, Concepción Valencia, Berliner Tor, Erik Kuhn, and Martin Fiedler

Subjects
Materials science, Petroleum engineering, Biodegradable lubricating greases, Polarity (physics), Mechanical Engineering, Base oil, Structural degradation, biodegradable lubricating greases, Oil polarity, Surfaces, Coatings and Films, Transient flow, Rheology, oil polarity, lcsh:Q, rheology, transient flow, Transient (oscillation), Thickening, AFM, Composite material, lcsh:Science, Shear flow
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.

Published
2015
Full Text
View/download PDF

3. Biodegradable Grease Technology for Future Army Combat Systems

Author

TACOM RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI, Rhee, In-Sik, TACOM RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI, and Rhee, In-Sik

Abstract

Environmental safety and compliance has recently become the most significant worldwide issue. Over the past decades, many Army installations throughout the United States have been contaminated with petroleum hydrocarbon-based fuels and lubricants. The generation of the potentially hazardous wastes by Petroleum, Oil, and Lubricant (POL) products not only cause both short and long term liability with respect to environmental damage, but can result in deteriorated mission performance and high cleanup costs. For this reason, the Army is currently soliciting a technology that can be used to minimize waste stream of POL products utilized in the current and Future Combat Systems. This paper presents the results of development of Army's biodegradable greases. laboratory biodegradation tests. and field demonstrations including bioremediation tests., See also ADM001736. Proceedings of the Army Science Conference (24th) held in Orlando, FL on 29 Nov-2 Dec 2004. The original document contains color images.

Published
2004

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