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Influence of fatty acid additives on the tribological performance of sunflower oil
Author(s) -
Baumgart Patrick,
Canzi Gabriele,
Hanashiro Tory,
Doezema Lambert A.,
Siniawski Matthew T.
Publication year - 2010
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.134
Subject(s) - sunflower oil , tribology , stearic acid , arachidic acid , fatty acid , behenic acid , chemistry , vegetable oil , carbon chain , organic chemistry , food science , environmentally friendly , materials science , chemical engineering , composite material , palmitic acid , ecology , engineering , biology
Vegetable oils are potential substitutes for petroleum‐based lubricants because they are environmentally friendly, renewable, less toxic and readily biodegradable. The addition of free fatty acids has been shown to increase the lubrication performance of vegetable oils at elevated temperatures. The purpose of this study was to evaluate the relationship between the length of the carbon chain in the fatty acid and its effectiveness as an additive for a range of elevated temperatures. Stearic, arachidic and behenic fatty acid additives were added to commercial sunflower oil. All fatty acid additives were shown to be effective in lowering the wear rate and coefficient of friction in ball‐on‐disc tribological tests. The overall carbon chain length was not observed to have a consistent influence on the effectiveness of the additive. All additives were less effective at temperatures above 100°C. Copyright © 2010 John Wiley & Sons, Ltd.