Estudio experimental de la estabilidad y propiedades termofísicas de los nanolubricantes PEG 400-CuO, PEG 400-Grafeno y PEG 400-CuO/Grafeno

  • Jaime Felipe Moreno-Mendoza Grupo de Investigación Materiales Avanzados y Energía- MATyER
  • Juan Felipe Santa-Marín Grupo de Investigación Materiales Avanzados y Energía- MATyER
  • Robison Buitrago-Sierra Grupo de Investigación Materiales Avanzados y Energía- MATyER
  • Karen Cacua Grupo de Investigación Materiales Avanzados y Energía- MATyER

Resumen

La adición de nanomateriales a los lubricantes convencionales se ha presentado como una alternativa para modificar sus propiedades termofísicas y tribológicas, buscando incrementar su rendimiento. Este estudio presenta los resultados de la evaluación experimental de estabilidad, conductividad térmica y viscosidad dinámica de los nanolubricantes PEG400-CuO, PEG400-Grafeno y PEG400-CuO/Grafeno. Los nanolubricantes se prepararon por el método de dos pasos y se utilizaron dos concentraciones 0.1 y 0.5 % p/p de cada tipo de nanomaterial. Los resultados experimentales mostraron que las dispersiones con menor aglomeración y sedimentación durante el tiempo de evaluación fueron las preparadas con 0.1 % p/p de grafeno. La conductividad térmica de la dispersión PEG400-CuO no presentó diferencias significativas con respecto a la conductividad del PEG400. Sin embargo, la conductividad para las dispersiones PEG400-Grafeno y PEG400-CuO/Grafeno (0.5 % p/p), incrementó hasta un 13.5 % y 5.2 %, respectivamente. La viscosidad dinámica de las dispersiones con una concentración de 0.1 % p/p no presentó cambios significativos con respecto al PEG400, mientras que la viscosidad de la dispersión G-PEG para la concentración de 0.5 % p/p fue superior que la del PEG400 para todas las temperaturas evaluadas.

Palabras clave: polietilenglicol, PEG400, nanolubricantes biodegradables, conductividad térmica, viscosidad dinámica, estabilidad, nanofluidos

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Publicado
2021-06-28