RT Journal Article
T1 Equilibration of a Polycation–Anionic Surfactant Mixture at the Water/Vapor Interface
A1 Akanno, Andrew
A1 Guzmán Solís, Eduardo
A1 Fernández Peña, Laura
A1 Llamas, Sara
A1 Ortega Gómez, Francisco
A1 González Rubio, Ramón
AB The adsorption of concentrated poly(diallyldimethylammonium chloride) (PDADMAC)–sodium lauryl ether sulfate (SLES) mixtures at the water/vapor interface has been studied by different surface tension techniques and dilational viscoelasticity measurements. This work tries to shed light on the way in which the formation of polyelectrolyte–surfactant complexes in the bulk affects the interfacial properties of mixtures formed by a polycation and an oppositely charged surfactant. The results are discussed in terms of a two-step adsorption–equilibration of PDADMAC–SLES complexes at the interface, with the initial stages involving the diffusion of kinetically trapped aggregates formed in the bulk to the interface followed by the dissociation and spreading of such aggregates at the interface. This latter process becomes the main contribution to the surface tension decrease. This work aids our understanding of the most fundamental basis of the physicochemical behavior of concentrated polyelectrolyte–surfactant mixtures which present complex bulk and interfacial interactions with interest in both basic and applied sciences.
PB American Chemical Society
SN 0743-7463
YR 2018
FD 2018
LK https://hdl.handle.net/20.500.14352/94686
UL https://hdl.handle.net/20.500.14352/94686
LA eng
NO Andrew Akanno, Eduardo Guzmán, Laura Fernández-Peña, Sara Llamas, Francisco Ortega, and Ramón G. Rubio Langmuir 2018 34 (25), 7455-7464DOI: 10.1021/acs.langmuir.8b01343
NO Ministerio de Economía y Competitividad (España)
NO European Commisssion
DS Docta Complutense
RD 5 abr 2025