4.4 Article

Influence of the Nanoclay Concentration and Oil Viscosity on the Rheological and Tribological Properties of Nanoclay-Based Ecolubricants

Journal

LUBRICANTS
Volume 9, Issue 1, Pages -

Publisher

MDPI
DOI: 10.3390/lubricants9010008

Keywords

ecolubricants; friction coefficient; wear; nanoclays; sepiolite; castor oil

Funding

  1. Programa Operativo FEDER-Andalucia [UHU-1255843]
  2. Consejeria de Economia y Conocimiento de la Junta de Andalucia [UHU-1255843]

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This study demonstrates that fiber-like nanoclay Pangel B20 acts as a good anti-wear and load-carrying additive in eco-friendly lubricants, while Cloisite 15A has friction reducing properties. These anti-wear and friction reducing properties are influenced by both nanoclay concentration and oil viscosity.
This manuscript describes a rheological and tribological study carried out on eco-friendly lubricants. These ecolubricants were made up of nanoclays as dispersed phase (a layered nanosilicate (montmorillonite Cloisite 15A) and a fiber-like nanoclay (sepiolite Pangel B20)) and vegetable-based oil as continuous phase (castor oil (CO), high oleic sunflower oil (HOSO) and their mixtures). A series of nanoclay-based ecolubricants were prepared by varying both nanoclay concentration and base oil, and thus, its viscosity. Friction and wear behaviors were assessed by using a ball-on-three plates tribometer cell. The results showed that the fiber-like sepiolite Pangel B20 yielded an important reduction in the wear scar diameter, thus revealing its potential as anti-wear and load-carrying additive in ecolubricant formulations, while Cloisite 15A proved to have friction improving properties. These anti-wear and friction reducing properties were found to be influenced by both nanoclay concentration and oil viscosity.

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