Adsorption isotherms of cationic surfactants on silica particles measured by NMR spectroscopy
(English)Manuscript (preprint) (Other academic)
We present here a new method that employs NMR spectroscopy to quantify the adsorbed amount of surfactant on the surface of particles and thereby provide the adsorption isotherm. As demonstration, the adsorption isotherms for a series of cationic surfactants on silica particles are obtained. Those results are in general agreement with previous observations and the overall appearances of adsorption isotherms exemplify the interplay between electrostatic and hydrophobic interactions. Compared to other available methods, the experimental error is comparable or smaller in a very wide range of surfactant concentrations and there exist other potential advantages.
IdentifiersURN: urn:nbn:se:kth:diva-30471OAI: oai:DiVA.org:kth-30471DiVA: diva2:400352
QC 201102252011-02-252011-02-252011-02-25Bibliographically approved