caa a22 4500 475763572 CHVBK 20180406123558.0 cr unu---uuuuu 170329e20000601xx s 000 0 eng 10.1007/s003960050551 doi (NATIONALLICENCE)springer-10.1007/s003960050551 An atomic force microscopy study of asphaltenes on mica surfaces. Influence of added resins and demulsifiers [Elektronische Daten] [M.-H. Ese, J. Sjöblom, J. Djuve, R. Pugh]  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 fractions 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 gradual increase in resin concentration leads to an opening of the rigid asphaltene structure towards a more resin like configuration. Increased aggregation when the two heavy functions are present in one film is seen as larger individual units in the AFM pictures. Addition of high-molecular-weight demulsifiers/inhibitors results in the same kind of influence on the asphaltene film as seen with the resins. Springer-Verlag Berlin Heidelberg, 2000 Key words Asphaltenes nationallicence Resins nationallicence Langmuir nationallicence Blodgett nationallicence Mica nationallicence Atomic force microscopy nationallicence Ese M.-H Department of Chemistry University of Bergen Allègt. 41, 5007 Bergen, Norway, NO aut Sjöblom J. Statoil A/S, R&D Centre Rotvoll, 7005 Trondheim, Norway, NO aut Djuve J. Institute for Surface Chemistry Box 5607, 114 86, Stockholm, Sweden, SE aut Pugh R. Institute for Surface Chemistry Box 5607, 114 86, Stockholm, Sweden, SE aut https://doi.org/10.1007/s003960050551 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s003960050551 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ese M.-H Department of Chemistry University of Bergen Allègt. 41, 5007 Bergen, Norway, NO aut NATIONALLICENCE 700 1- Sjöblom J. Statoil A/S, R&D Centre Rotvoll, 7005 Trondheim, Norway, NO aut NATIONALLICENCE 700 1- Djuve J. Institute for Surface Chemistry Box 5607, 114 86, Stockholm, Sweden, SE aut NATIONALLICENCE 700 1- Pugh R. Institute for Surface Chemistry Box 5607, 114 86, Stockholm, Sweden, SE aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer