Publicado

2018-10-01

Evaluation of the lubricating power of chemical modified Sesame oil additivated with Cu and Al2O3 nanoparticles

Evaluación del poder lubricante de aceite de Ajonjolí modificado por vía química y aditivado con nanopartículas de Cu y Al2O3

Palabras clave:

Al2O3 nanoparticles, biolubricants, Cu nanoparticles, sesame oil, tribology (en)
aceite de ajonjolí, biolubricantes, nanopartículas de Al2O3, nanopartículas de Cu, tribología (es)

Autores/as

Biolubricant from modified sesame oil (Sesamumindicum L.) was produced. The lubricant base consists of a mixture in a volume ratio of 74 parts of epoxidized sesame and 26 parts of transesterified sesame oil. This mixture was characterized by FT-IR, thermo-oxidative stability was determined and heating and cooling curves were performed, where a crystallization and solidification temperature of -8 °C was obtained. To improve the lubricating capacity of the oil blend concentrations of 0.05, 0.10, 0.15 and 0.20% of copper nanoparticles (NPsCu) and alumina nanoparticles (NPsAl2O3) were added, which had been subjected to tribological tests for the wear scar measurement and characterized by scanning electron microscopy (SEM). The addition of NPsCu and NPsAl2O3 improved the lubricating power of oil base-stock. The NPsCu percentage in modified sesame oil that showed the best lubricating performance was in the interval between 0.15-0.2; as for the oil with NPs2O3 better result was obtained with 0,05% of NPs.
Biolubricante a partir de aceite de ajonjolí modificado fue producido. La base lubricante consiste de una mezcla cuya relación en volumen fueron 74 partes de aceite epoxidado y 26 partes de aceite transesterificado de ajonjolí. Esta base lubricante fue caracterizada mediante FT-IR, se determinó la estabilidad termo-oxidativa y se realizaron curvas de calentamiento y enfriamiento, donde se obtuvo una temperatura de cristalización y solidificación de –8 °C. Para mejorar la capacidad lubricante de la mezcla de aceites se adicionaron las concentraciones de 0.05, 0.1, 0.15 y 0.20% de nanopartículas de cobre (NPsCu) y nanopartículas de alúmina (NPsAl2O3), a los cuales se les realizó ensayos tribológicos de medición del desgaste de huella y se caracterizó mediante microscopía de barrido electrónico (SEM). La adición de NPsCu y NPsAl2O3 mejoró el poder lubricante del aceite base. El porcentaje de NPsCu en el aceite de ajonjolí modificado que mostró el mejor desempeño estuvo en el intervalo entre 0.15-0.2. Para el aceite con NPsAl2O3 el mejor resultado fue obtenido con 0.05% de NPs.

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