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Surfactant‐mediated formation of alginate layers at the water‐air interface
Author(s) -
Degen Patrick,
Paulus Michael,
Zwar Elena,
Jakobi Victoria,
Dogan Susanne,
Tolan Metin,
Rehage Heinz
Publication year - 2019
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6691
Subject(s) - pulmonary surfactant , surface tension , rheology , cationic polymerization , viscoelasticity , zeta potential , chemical engineering , materials science , polymer , turbidity , reflectivity , chemistry , composite material , polymer chemistry , nanotechnology , optics , thermodynamics , nanoparticle , oceanography , physics , geology , engineering
The self‐organization process of polysaccharide alginate with different cationic surfactants at the water‐air interface was investigated over a wide concentration regime. The changes of surface properties determined by surface tension measurements, surface rheology, and X‐ray reflectivity are correlated with changes of bulk properties measured by turbidity, light scattering, and zeta potential measurements. We demonstrate that the interactions between the alginate and cationic surfactants result in significant changes of bulk and interfacial properties. The results of surface shear experiments point to the existence of highly viscoelastic interfacial films. In combination with X‐ray reflectivity, we demonstrate that these rheological features are related to polymer‐surfactant associations at the interface. In the regime of high surfactant concentrations, we observed the existence of multilayer structures.