Soybean oil-based lubricants: A search for synergistic antioxidants

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

Research output: Contribution to journalArticlepeer-review

86 Scopus citations


Vegetable oils can contribute toward the goal of energy independence and security due to their naturally renewable resource. They are promising candidates as base fluids for ecofriendly lubricants because of their excellent lubricity, biodegradability, good viscosity - temperature characteristics, and low evaporation loss. Their use, however, is restricted due to low thermo-oxidative stability and poor cold-flow behavior. This paper presents a systematic approach to improve their oxidation behavior by searching for a suitable additive combination. The study of antioxidant/antiwear additive synergism was investigated on a set of four antioxidants and three antiwear additives in vegetable oils using pressure differential scanning calorimetty (PDSC) and a rotary bomb oxidation test (RBOT). The results indicate that dialkyldithiocarbamate antioxidant performed better than diphenylamine and hindered phenol. The zinc dialkyldithiocarbamate antioxidant showed excellent synergism with antiwear additive antimony dithiocarbamates.

Original languageEnglish (US)
Pages (from-to)2408-2414
Number of pages7
JournalEnergy and Fuels
Issue number4
StatePublished - Jul 1 2007

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology


Dive into the research topics of 'Soybean oil-based lubricants: A search for synergistic antioxidants'. Together they form a unique fingerprint.

Cite this