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RESEARCH PRODUCT

Self-assembly in surfactant-based liquid mixtures: Bis(2-ethylhexyl)phosphoric acid/bis(2-ethylhexyl)amine systems

Pietro CalandraAngela RuggirelloAndrea MeleVincenzo Turco Liveri

subject

ChemistryAnalytical chemistryInfrared spectroscopyConductivitySurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsBiomaterialschemistry.chemical_compoundColloid and Surface ChemistryPulmonary surfactantChemical engineeringAmphiphileX-ray crystallographyAmine gas treatingSelf-assemblyPhosphoric acidSurfactants Conducting materials Self-assembly Liquid mixturesSettore CHIM/02 - Chimica Fisica

description

Surfactant-based liquid mixtures constitute an interesting class of nanostructured materials with promising potential in specialized applications. Here, structural and conductometric properties of liquid mixtures composed of bis(2-ethylhexyl)amine (BEEA) and bis(2-ethylhexyl)phosphoric acid (HDEHP) have been thoroughly investigated with the aim to correlate structural features with system charge transport capability. The evolution of self-assembled local nanostructures with system composition has been investigated by FT-IR and XRD while the conductometric properties were probed by conventional AC complex impedance. Both pure components exhibit nano-segregation due to their amphiphilic nature but with only very low proton conductivities. However their mixtures, characterized by local organization of polar and apolar domains driven by acid-base interactions between HDEHP PO(4)H and BEEA NH groups, show enhanced structural order and proton conductivity.

yearjournalcountryeditionlanguage
2010-01-01
10.1016/j.jcis.2010.04.031http://hdl.handle.net/10447/50808