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

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dc.citation.firstpage695
dc.citation.issueNumber3
dc.citation.journalTitleLangmuir
dc.citation.lastpage701
dc.citation.volumeNumber35
dc.contributor.authorChen, Yi-Lin
dc.contributor.authorZhang, Leilei
dc.contributor.authorSong, Jin
dc.contributor.authorJian, Guoqing
dc.contributor.authorHirasaki, George
dc.contributor.authorJohnston, Keith
dc.contributor.authorBiswal, Sibani Lisa
dc.date.accessioned2019-08-12T17:16:51Z
dc.date.available2019-08-12T17:16:51Z
dc.date.issued2019
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.
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.
dc.identifier.doihttps://doi.org/10.1021/acs.langmuir.8b03150
dc.identifier.urihttps://hdl.handle.net/1911/106217
dc.language.isoeng
dc.publisherAmerican Chemical Society
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.
dc.titleTwo-Step Adsorption of a Switchable Tertiary Amine Surfactant Measured Using a Quartz Crystal Microbalance with Dissipation
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpost-print
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