Dynamic structural organization of an asphaltene model compound at the air-water interface : a non-thermodynamic effect during compression-expansion experiments

Interfacial behavior of crude oil is largely dominated by asphaltenes. Understanding the interfacial activity of this fraction, characterized by its complexity, wide variety of chemical motifs and dynamic functionalities is thus a difficult task. Asphaltene model compounds are molecules of known structure developed to mimic certain interfacial properties, allowing a better understanding of how asphaltenes behave at various interfaces. In this work, the interfacial behavior of an acidic polyaromatic compound (C5PeC11), used as an asphaltene model compound, was evaluated at the air-water interface using a multi-scale approach. Compression-expansion experiments, using rectangular and radial Langmuir troughs, surface structural relaxation evaluations, and fluorescence microscopy imaging were transversally conducted seeking connections between molecular and microscopic phenomena in the interfacial behavior of the asphaltene model compound...

• Autores: Fajardo Rojas, Jair Fernando
• Fecha de publicación: 2020
• Institución: Universidad de los Andes
• Repositorio: Séneca: repositorio Uniandes
• Idioma: eng
• OAI Identifier: oai:repositorio.uniandes.edu.co:1992/51018
• Acceso en línea: http://hdl.handle.net/1992/51018
• Palabra clave: Asfalteno; Química de superficies; Refinación del petróleo; Ingeniería
• Rights: openAccess
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/