期刊
NANOMATERIALS
卷 11, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/nano11112987
关键词
sustainability; lubrication; friction coefficient; wear; nanocellulose; vegetable oil
类别
资金
- Programa Operativo FEDER Andalucia 2014-2020 [UHU-1255843]
- Consejeria de Economia y Conocimiento de la Junta de Andalucia
- program Ayudas para la promocion de empleo joven e implantacion de la Garantia Juvenil en I + D + i en el Subprograma Estatal de Incorporacion, del Programa Estatal de Promocion del Talento y su Empleabilidad en I + D + i [PEJ2018-003949-A]
Nanocellulose demonstrated noticeable friction-reducing and anti-wear properties in vegetable oil, depending on the nanocellulose concentration, base oil composition, and applied pressure. Adding 3.3 wt.% or higher nanocellulose in castor oil-rich mixtures can achieve excellent tribological performance.
Based on the response surface methodology, a rheological and tribological study carried out on eco-friendly lubricants is described. Such ecolubricants consisted of fibrillated or crystalline nanocellulose in vegetable oil (castor oil, high oleic sunflower oil or their mixtures). Cellulose nanoparticles showed noticeable friction-reducing and anti-wear properties within the boundary and mixed lubrication regimes, which were found to be dependent on nanocellulose concentration, base oil composition and applied normal force. In general, both types of nanocellulose performed equally well. An excellent tribological performance, with large wear scar diameter reductions, was achieved with 3.3 wt.% (or higher) nanocellulose dispersions in castor oil-rich mixtures. The observed behavior was explained on the basis of enhanced viscosity of castor oil-rich suspensions and the preferential action of the most polar components, nanocellulose and ricinoleic acid, in the vicinity of the contact surfaces.
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