Two-Step Adsorption of a Switchable Tertiary Amine Surfactant Measured Using a Quartz Crystal Microbalance with Dissipation

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dc.citation.firstpage695en_US
dc.citation.issueNumber3en_US
dc.citation.journalTitleLangmuiren_US
dc.citation.lastpage701en_US
dc.citation.volumeNumber35en_US
dc.contributor.authorChen, Yi-Linen_US
dc.contributor.authorZhang, Leileien_US
dc.contributor.authorSong, Jinen_US
dc.contributor.authorJian, Guoqingen_US
dc.contributor.authorHirasaki, Georgeen_US
dc.contributor.authorJohnston, Keithen_US
dc.contributor.authorBiswal, Sibani Lisaen_US
dc.date.accessioned2019-08-12T17:16:51Zen_US
dc.date.available2019-08-12T17:16:51Zen_US
dc.date.issued2019en_US
dc.description.abstractThe adsorption of a switchable cationic surfactant, N,N,N′-trimethyl-N′-tallow-1,3-diaminopropane (DTTM, Duomeen TTM), at the silica/aqueous solution interface is characterized using a quartz crystal microbalance with dissipation (QCM-D). The adsorption isotherms reveal that changes in the solution pH or salinity affect surfactant adsorption in competing ways. In particular, the combination of the degree of protonation of the surfactant and electrostatic interactions is responsible for surfactant adsorption. The kinetics of adsorption is carefully measured using the real-time measurement of a QCM-D, allowing us to fit the experimental data with analytical models. At pH values of 3 and 5, where the DTTM is protonated, DTTM exhibits two-step adsorption. This is representative of a fast step in which the surfactant molecules are adsorbed with head-groups orientated toward the surface, followed by a slower second step corresponding to formation of interfacial surfactant aggregates on the silica surface.en_US
dc.identifier.citationChen, Yi-Lin, Zhang, Leilei, Song, Jin, et al.. "Two-Step Adsorption of a Switchable Tertiary Amine Surfactant Measured Using a Quartz Crystal Microbalance with Dissipation." <i>Langmuir,</i> 35, no. 3 (2019) American Chemical Society: 695-701. https://doi.org/10.1021/acs.langmuir.8b03150.en_US
dc.identifier.doihttps://doi.org/10.1021/acs.langmuir.8b03150en_US
dc.identifier.urihttps://hdl.handle.net/1911/106217en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.en_US
dc.titleTwo-Step Adsorption of a Switchable Tertiary Amine Surfactant Measured Using a Quartz Crystal Microbalance with Dissipationen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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