Effect of graphene and ionic liquid additives on the tribological performance of epoxy resin

Journal ar
Tribology Letters
  • Volumen: 56
  • Número: 1
  • Fecha: 01 enero 2014
  • Páginas: 133-142
  • ISSN: 10238883
  • Tipo de fuente: Revista
  • DOI: 10.1007/s11249-014-0392-2
  • Tipo de documento: Artículo
  • Editorial: Springer New York
© 2014 Springer Science+Business Media.In the present study, we have determined the effect of graphene (PG), the ionic liquid (IL) and PG modified by mechanical blend with the IL 1-octyl-3-methylimidazolium tetrafluorobotate (IL + PG) on the tribological performance of epoxy resin (ER). IL + PG stable suspensions have been added to an epoxy resin (ER) matrix to obtain the new nanocomposite (ER + IL + PG), and its tribological performance has been compared with that of neat epoxy resin and with the nanocomposites containing PG (ER + PG) or IL (ER + IL). While neat ER presents a high dynamic friction coefficient of up to 0.31 and a severe wear with a specific wear rate of 8.1 × 10-4 mm3 N-1m-1, the new nanocomposites show negligible surface damage, as determined by surface roughness and profilometry. All nanocomposites show low friction coefficients and negligible wear. The maximum friction reduction, up to a 70 %, is obtained for ER + PG. Results are discussed upon the basis of TEM microscopy, SEM microscopy and EDX analysis, differential scanning calorimetry, thermogravimetric analysis and dynamic mechanical analysis. Addition of IL or IL + PG has a plasticizing effect on ER, while addition of PG increases the thermal stability and stiffness of ER. PG shifts the storage modulus onset and in the loss modulus and tan ¿ maximum peaks to higher temperatures, while a shift to lower values is observed with addition of IL or IL + PG.

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