Soybean oil based greases: Influence of composition on thermo-oxidative and tribochemical behavior

Brajendra K. Sharma, Atanu Adhvaryu, Joseph M. Perez, Sevim Z. Erhan

Research output: Contribution to journalArticlepeer-review


The biodegradable properties and lubricating ability of greases depend on both the base oil and the thickener. Mineral oils are the most widely used lubricant base fluids due to their inherent lubricity and low cost, but recent environmental awareness has forced consideration of the use of biodegradable fluids such as vegetable oils and certain synthetic fluids in grease formulations. This study presents data on the thermo-oxidation behavior and tribology of biodegradable greases formulated with soybean oil and different compositions of metal soap thickener. The composition of thickener has been varied by using fatty acids with different degrees of unsaturation and fatty acids of different chain lengths. The improvement of thermo-oxidation and tribological properties as a result of changing thickener/ base oil ratio and the antioxidative effect of some suitable additives have also been evaluated.

Original languageEnglish (US)
Pages (from-to)2961-2968
Number of pages8
JournalJournal of Agricultural and Food Chemistry
Issue number8
StatePublished - Apr 20 2005
Externally publishedYes


  • Friction
  • Grease
  • Oxidative stability
  • Soybean oil
  • Vegetable oils

ASJC Scopus subject areas

  • General Chemistry
  • General Agricultural and Biological Sciences


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