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Synthesis and Lubricant Properties of Vegetable Oil based on Estolides
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  • Journal title : Tribology and Lubricants
  • Volume 31, Issue 5,  2015, pp.195-204
  • Publisher : The Korean Society of Tribologists and Lubrication Engineers
  • DOI : 10.9725/kstle.2015.31.5.195
 Title & Authors
Synthesis and Lubricant Properties of Vegetable Oil based on Estolides
Son, Jeong-Mae; Kim, Nam-Kyun; Shin, Jihoon; Chung, Kunwo; Yoon, Byung-Tae; Kim, Young-Wun;
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 Abstract
Several researches are focused on improving the value of fine chemicals based on biomass resources due to environmental and other concerns associated with the use of petroleum-based products. Therefore, the synthesis and application of estolides derived from plant-based waste oil materials and their application as lubricants and as processing oil for butyl rubber products have been studied. Four kinds of estolide were prepared with conversions of 71~92% over 24h using various vegetable oils, as determined by size exclusion chromatography (SEC) and nuclear magnetic resonance (NMR) spectroscopy. FT-IR spectroscopy determines the esterification of estolides using 2-ethylhexyl alcohol. The estolides have iodine values of 35~90, α-ester/α-acid ratios of 0.45~0.55, and total acid number of 114~134 mg KOH g–1. Four ball wear tests show that the wear scar diameters (WSDs) of estolides as base oil significantly decreased to 0.328~0.494 mm, compared to WSDs of 0.735 and 0.810 mm of WSD for 150N and Yubase 6, respectively, as general base oil. Thus, the estolides have better wear resistance and satisfying design objectives for the engineering of a variety of lubricant base oils.
 Keywords
estolides;fatty acid;lubricants;wear scar diameter;
 Language
Korean
 Cited by
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