Ion mobility and gel complex structure in dodecyl trimethylammonium/polyacrylate gel complexes
(English)Manuscript (preprint) (Other academic)
In the present study dielectric spectroscopy and small angle x-ray scattering were employed to evaluate temperature dependent ionic mobility and structural features in a dodecyltrimethylammonium/polyacrylate gel complex. A gradually transition of the gel complex from a structure exclusively consisting of discrete micelles arranged on a hexagonal close-packed lattice at 25 °C to a structure mainly consisting of a hexagonal phase of long rod-like micelles at ~ 65 °C was revealed. As well it was found that the mobility of the dodecyltrimethylammonium surfactant ions increased with an increasing fraction of hexagonal phase domains, something which was most likely due to a “residence time-hopping distance” mechanism of monomer ions moving between the micelles. The present findings should be useful for the understanding of the gel structure influence on the mechanisms for surfactant transport and shell formation in surfactant polyion gel complexes.
Dielectric Spectroscopy, SAXS, Dodecyltrimethyl ammonium ion, polyacrylate ion, surfactant-poly ion complexes, mobility
Research subject Engineering Science with specialization in Solid State Physics
IdentifiersURN: urn:nbn:se:uu:diva-205020OAI: oai:DiVA.org:uu-205020DiVA: diva2:640444