Abstract
A variety of analytical techniques, such as scanning electron microscopy and 19F dynamic nuclear polarization (DNP) methods, are applied to characterize asphaltene extracted from MC-800 liquid asphalt in fluorobenzene derivatives at 1.53 mT and at room temperature. Different solvents show variable affinities for the asphaltene surface. The low field EPR spectrum of the asphaltene/hexafluorobenzene sample was recorded. The DNP parameters were determined. Additionally, the interactions between the nuclei of the solvent and the electrons delocalized on the asphaltene are interpreted. Not only dipolar but also scalar interactions between the nuclear spin and the electron spin were found.
Notes
Viscosity values in this table are taken from Yaws[ Citation 48 ] and dipole moment from Trudell[ Citation 49 ] and Narayan[ Citation 50 ] works.
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