Thermo-oxidation, friction-reducing and physicochemical properties of ricinoleic acid based-diester biolubricants

Nadia Salih, Jumat Salimon, Bashar Mudhaffar Abdullah, Emad Yousif

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A major global effort is currently underway to reduce dependence on petroleum products and minimize the impact of their derivatives on the environment. Plant oils are being investigated as a potential source of environmentally favorable lubricants given their combination of biodegradability, renewability and excellent lubrication performance. Low oxidation and thermal stability, poor low-temperature properties and a narrow range of available viscosities, however, limit their potential application as industrial biolubricants. The chemical modification of plant fatty acid structures has great potential for improving the physicochemical and friction-reducing properties of these compounds. This paper presents the thermo-oxidation, friction-reducing and physicochemical properties of a series of diester compounds derived from ricinoleic acid as biolubricant basestocks. The results indicated that among the synthesized ricinoleic acid-based diester compounds, octyl 10,12-dihydroxy-9-behenoxystearate 16 has the lowest pour point (-53.26 °C), while octyl 10,12-dihydroxy-9-octyloxystearate 10 has the highest onset temperature (128.98 °C) and the lowest volatile loss and quantity of insoluble deposits (68.78% and 77.25%, respectively). The friction-reducing results indicate an improvement occurred in the presence of longer mid-chain esters and an increased polarity in the ester functional group. The data indicate that some synthesized derivatives have significant potential as environmentally friendly biolubricant basestocks.

Original languageEnglish
JournalArabian Journal of Chemistry
DOIs
Publication statusAccepted/In press - 2014

Fingerprint

Friction
Oxidation
Acids
Esters
Low temperature properties
Derivatives
Petroleum products
Plant Oils
Biodegradability
Chemical modification
Fatty acids
Functional groups
Lubrication
Lubricants
Thermodynamic stability
Fatty Acids
Deposits
Viscosity
ricinoleic acid
Temperature

Keywords

  • Friction-reducing properties
  • Low-temperature properties
  • Oxirane ring opening
  • Ricinoleic acid-based diesters
  • TFMO test

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Thermo-oxidation, friction-reducing and physicochemical properties of ricinoleic acid based-diester biolubricants. / Salih, Nadia; Salimon, Jumat; Abdullah, Bashar Mudhaffar; Yousif, Emad.

In: Arabian Journal of Chemistry, 2014.

Research output: Contribution to journalArticle

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