Friction and wear behavior of thioether hydroxy vegetable oil

Brajendra K. Sharma, A. Adhvaryu, Sevim Z. Erhan

Research output: Contribution to journalArticlepeer-review


This work describes the tribochemical evaluation of vegetable oil based antiwear additive obtained through chemical modification. The Sulfur was incorporated using a chemical reaction of epoxidized vegetable oil and common thiols, resulting in formation of a hydroxy thioether derivative of vegetable oils. The synthesis retains the vegetable oil structure, eliminates poly-unsaturation in the molecule, and adds polar functional groups that significantly improve adsorption on metal surfaces. These additives are obtained by chemical modification of oils originated from natural resources. The tribochemical behavior of sulfur incorporated vegetable oil was studied by measuring friction coefficient using ball-on-disk configuration and wear scar diameter using four-ball configuration. Comparative tests with commercial antiwear additives demonstrate the effectiveness of these derivatives. The derivatives were found useful as agriculturally based antiwear additives for lubricant applications.

Original languageEnglish (US)
Pages (from-to)353-358
Number of pages6
JournalTribology International
Issue number2
StatePublished - Feb 1 2009
Externally publishedYes


  • Antiwear additive
  • Ball-on-disk
  • Epoxidized vegetable oil
  • Four-ball
  • Lubricant additive
  • Sulfur

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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