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United States Department of Agriculture

Agricultural Research Service

Title: Estolide Anti-Oxidant Compatibility Investigation

Authors
item Cermak, Steven
item Biresaw, Girma
item Isbell, Terry

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: May 3, 2006
Publication Date: May 3, 2006
Citation: Cermak, S.C., Biresaw, G., Isbell, T. 2006. Estolide anti-oxidant compatibility investigation [abstract]. 97th AOCS Annual Meeting & Expo Abstracts. p. 76.

Technical Abstract: Estolides have shown great promise as a biodegradable lubricant when compared to commercially available industrial products such as petroleum-based hydraulic fluids, soy-based fluids, and petroleum oils. A series of estolides (oleic estolide 2-ethylhexyl esters and coco-oleic estolide 2-ethylhexyl esters) and estolide based products (distilled monomer fractions) were formulated with different concentrations of experimental and commercial anti-oxidant packages. The experimental packages were binary mixtures of hindered phenol (HP) and aromatic amine (AA) type anti-oxidants, with varying HP to AA ratios. The estolide formulations were evaluated for their oxidative stability using the rotating bomb oxidative test (RBOT) following ATSM D-2272-98 Method. Low concentrations of the experimental anti-oxidant packages greatly improved the thermal stabilities of the estolides, and showed promise for formulating a competitive bio-based lubricant. The oxidative stabilities of the formulated estolides and estolide based products will be compared to those of commercially available lubricants and experimental lubricant samples.

Last Modified: 10/25/2014
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