Surface tension of bitumen from contact angle measurements on films of bitumen

Vargha-Butler, E.I.; Potoczny, Z. M.; Zubovits, T.K.; Budziak, C. J.; Neumann, A. W.

doi:10.1021/ef00011a009

Cited by 31 publications

(18 citation statements)

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“…Although adhesion between mineral aggregates and bitumen is a major topic in materials research [6,7,22,24,31,57], CLSM has not been used yet to investigate bitumen/mineral aggregate mixtures. Comparing five different bitumina by CLSM we were able to monitor the dependence of the microstructure on the phase composition.…”

Section: Introductionmentioning

confidence: 99%

The bitumen microstructure: a fluorescent approach

et al. 2014

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Five bituminous samples were carefully studied by confocal laser scanning microscopy using 488 nm excitation radiation and observing 500-530 nm of emission. The images revealed the microstructure of bitumen. The influence of the admixture of mineral aggregates concerning the microstructure was tested. For the minerals, no significant influence was found. For understanding the origin of fluorescent signals, the samples were separated into asphaltenes and maltenes and analyzed with fluorescence spectroscopy. Although former works have assumed the origin of fluorescent emissions in bitumen to be found in the asphaltene fraction, the asphaltenes produce little to no emissions, but the maltenes exhibit strong fluorescence in the observed spectral region. For deeper insight, fractionation of the bitumina into the SARA fractions by chromatographic column separation was necessary. The fluorescence spectra of these fractions were analyzed and revealed the aromatics and resin phases to be the only components capable of sufficiently intense fluorescent emission. This is a strong argument for a complex internal microstructure consisting of a mantle of aromatics surrounding an inner core.

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Section: Introductionmentioning

confidence: 99%

The bitumen microstructure: a fluorescent approach

et al. 2014

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“…Interfacial tensions for bitumen and water systems have been extensively studied at low temperatures and at various pressures [7][8][9][10][11][12][13][14][15][16]. Oil/aqueous equilibrium interfacial tensions were measured for a number of heavy crude oils at temperatures up to 200 • C using the spinning drop technique, and the effects of surfactant type, temperature, and NaCl and CaCl 2 concentrations on the interfacial tensions were studied by Isaacs et al [8].…”

Section: Introductionmentioning

confidence: 99%

Dynamic surface tensions of Athabasca bitumen vacuum residue including the effect of dissolved air

Elliott

McCaffrey

et al. 2005

Journal of Colloid and Interface Science

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“…The TOS should be considered in order to understand the reason for this phenomena. The TOS of data measured were 340,244, and 507 for pressure at 11,13.7,and 15 MPa,respectively. The data obtained at 244 and 340 h of TOS indicated j3 is 0.04. The positive value but close to zero of p is easily affected by deactivation of catalyst via increasing TOS.…”

Section: Removal Of Speciesmentioning

confidence: 99%