NDLI: Combined interfacial shear rheology and microstructure visualization of asphaltenes at air-water and oil-water interfaces

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Combined interfacial shear rheology and microstructure visualization of asphaltenes at air-water and oil-water interfaces

Content Provider	Semantic Scholar
Author	Lin, Yu Jiun Barman, Sourav He, Peng Zhang, Zhuqing Christopher, Gordon F. Biswal, Sibani Lisa
Copyright Year	2018
Abstract	Asphaltenes are surface-active polyaromatic molecules in crude oil that are known to deposit in pipelines or stabilize water droplets by flocculating at interfaces resulting highly viscous emulsions, leading to significant flow assurance problems. Commercial dispersants have been developed to disturb asphaltene aggregation to mitigate deposition, but their role on the interfacial properties of asphaltene films is unclear. In this study, we elucidate asphaltene interfacial rheology at air-water and oil-water interfaces at high and low asphaltene surface coverage and in the presence of dispersants. A modified Langmuir trough with double-wall ring rheometer is used to simultaneously visualize the microstructure of asphaltene interface and measure the rheological responses. Two surface coverages, 0.5 and 4 μg cm−2, show widely different rheological responses at air-water interfaces. Strong yielding behavior was observed for higher coverage while a less yielding behavior and wider linear viscoelastic regime we...
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF HTM / HTML
DOI	10.1122/1.5009188
Alternate Webpage(s)	http://osujilab-wiki.eng.yale.edu/@api/deki/pages/348/pdf
Alternate Webpage(s)	https://doi.org/10.1122/1.5009188
Volume Number	62
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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