STUDY OF THERMAL STRESS IN A LUBRICANT BASE OIL USING FIELD-CYCLING NMR RELAXOMETRY

GERBINO, L.; FRAENZA, CARLA C.; ERRO, EUSTAQUIO M.; ANOARDO, E.

Buenos Aires

Simposio; Humboldt Colloquium ?Shaping the Future of German-Argentinian Scientific Cooperation ? The Role of Curiosity-Driven Research?; 2018

Alexander Von Humboldt Foundation

Lubricant oils are complex mixtures of hydrocarbons composed of a base oiland additives [1]. A variety of physical and chemical factors combination changes the lubricant atmolecular level. Heating is present in all internal combustion engines, and has an active role inprocesses as, nitrogen, oxygen and sulfur incorporation, hydrocarbon chains ruptures andramifications [2-7]. In this work, proton fast field-cycling nuclear magnetic resonance (1H FFCNMR)is used to study the effect of thermal stress in a lubricant base oil.[1] R. A. Meyers, Handbook of petroleum refining processes (New York, NY: McGraw-Hill Professional, 2004), [2] J. Igarashi, Japan. J. Tribol. 35, 1095 (1990), [3] S. S. Wang, S. H. Lee, D. J. Smolenski, Sens. Actuators B 17, 179 (1994), [4] R. M.Mortier, S. T. Orszulik, Chemistry and Technology of Lubricants (Suffolk, UK: Edmundsbury, 1997), [5] M. F. Fox, D. J. Picken, M. C. R. Symons, A. L. Thomson, Tribol. Int. 30,417 (1997), [6] M. A. Al-Ghouti, L. Al-Atoum, J. Environ. Manag. 90, 187-95 (2009) pp 98?144, [7] E. Förster, H. Nirchl, G. Guthausen, Appl. Magn. Reson. 48, 51 (2016), [8] C. R. Jones, M. D. Greenhalgh, J. R. Bame, T. J. Simpson, R. J. Cox, J. W. Marshall, C. P. Butts, Chem. Commun. 52, 2920 (2016). [9] A. Abragam, Principles of Nuclear Magnetism(Oxford, Clarendon, 1961), p. 298-302, [10] L. P. Hwang, J. H. Freed. J. Chem. Phys. 63, 4017 (1975), [11] J. H. Freed. J. Chem. Phys. 68, 4034 (1978).