Surfactant mixing at hydrophilic solid/aqueous interfaces

DOI

By applying the regular solution model (RS) to the determination of composition in a mixed surfactant layer adsorbed at a hydrophilic solid/aqueous interfaceand combining it with the measurement of composition by NR gives us a means of measuring the surface CMC (CAC) of a surfactant, which approximately measures the concentration of the onset of cooperative adsorption. For most surfactants this will be greater than the CMC if their charge and the surface charge are identical, i.e. it is inaccessible to direct measurement. We propose to make systematic measurements on zwitterionic/charged mixtures to widen the range of known CACs. At the same time, there seem to be categories of systems for which the RS model is inappropriate and preliminary measurements suggest that zwitterionic/charged systems sometimes fall into this category. We propose to explore the reasons.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24081108
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24081108
Provenance
Creator Professor Jeff Penfold; Dr Bob Thomas; Dr Peixun Li; Dr Kun Ma
Publisher ISIS Neutron and Muon Source
Publication Year 2014
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2011-03-07T08:39:49Z
Temporal Coverage End 2011-03-11T09:01:51Z