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An atomic force microscopy study of asphaltenes on mica surfaces. Influence of added resins and demulsifiers
YKI – Ytkemiska institutet.
2000 (English)In: Colloid and Polymer Science, ISSN 0303-402X, E-ISSN 1435-1536, Vol. 278, 532-538 p.Article in journal (Refereed)
Abstract [en]

Monolayers of asphaltene and resins on the water surface have been transferred at a surface pressure of 10 mN/m onto mica substrates using the Langmuir-Blodgett technique. Atomic force microscopy (AFM) has been used to examine the topography of these layers. Monolayers consisting of pure asphaltene fraction provide a rigid film with a close packed structure, while the resins build up a continuous open network. Mixed films of these two fractions, show that a gradually increase of resin concentration leads to an opening of the rigid asphaltene structure towards a more resin like configuration. Increased aggregation when the two heavy fractions are present in one film, is seen as larger individual units in the AFM-pictures. Addition of high molecular weight demulsifiers/inhibitors resulted in the same kind of influence on the asphaltene film as seen with the resins.

Place, publisher, year, edition, pages
2000. Vol. 278, 532-538 p.
Keyword [en]
Asphaltenes, resins, Langmuir-Blodgett, mica, atomic force microscopy
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26360OAI: oai:DiVA.org:ri-26360DiVA: diva2:1053362
Note
A1290Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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