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Determination of the Physical Properties of Oil Sands Components using Scanning Probe Microscopy

  • Ravi Gaikwad
  • , Tinu Abraham
  • , Aharnish Hande
  • , Fatemeh Bakhtiari
  • , Siddhartha Das
  • , Thomas Thundat
  • University of Alberta
  • University of Maryland, Baltimore County

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Atomic force microscopy is employed to study the structural changes in the morphology and physical characteristics of asphaltene aggregates as a function of temperature. The exotic fractal structure obtained by evaporation-driven asphaltene aggregates shows an interesting dynamics for a large range of temperatures from 25°C to 80°C. The changes in the topography, surface potential and adhesion are unnoticeable until 70°C. However, a significant change in the dynamics and material properties is displayed in the range of 70°C - 80°C, during which the aspahltene aggregates acquire 'liquid-like' mobility and fuse together. This behaviour is attributed to the transition from the pure amorphous phase to a crystalline liquid phase which occurs at approximately 70°C as shown by using Differential Scanning Calorimetry (DSC). Additionally, the charged nature of asphaltenes and bitumen is also explored using kelvin probe microscopy. Such observations can lead to the development of a rational approach to the fundamental understanding of asphaltene aggregation dynamics and may help in devising novel techniques for the handling and separation of asphaltene aggregates using dielectrophoretic methods.

Original languageEnglish
Title of host publicationState-of-the-Art Developments in Materials Characterization
EditorsYunseok Kim, Dongsheng Li, Ali Passian, Rozaliya Barabash, Ulrich Lienert, Vassilia Zorba, Klaus-Dieter Liss, Klaus-Dieter Liss, Masato Ohnuma, Renato Zenobi, Arda Genc, Aude Lereu, Olga Ovchinnikova, Liane G. Benning, Jeffrey D. Rimer, Laurene Tetard, Thomas Thundat
PublisherMaterials Research Society
Pages69-74
Number of pages6
ISBN (Electronic)9781605117317
DOIs
StatePublished - 2016
Event2014 MRS Fall Meeting - Boston, United States
Duration: Nov 30 2014Dec 5 2014

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1754
ISSN (Print)0272-9172

Conference

Conference2014 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston
Period11/30/1412/5/14

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