https://doi.org/10.1007/s100510050826
SANS structural determination of a nonionic surfactant layer adsorbed on clay particles
1
CEA Saclay, Service de Chimie Moléculaire, bâtiment 125,
91191 Gif-sur-Yvette, France
2
CRMD, CNRS, 1bis rue de la Ferollerie, 45071 Orléans, France
Corresponding author: a grillo@ill.fr
Received:
4
August
1998
Published online: 15 July 1999
We study adsorption of two nonionic surfactants (C12E5 and C12E8) on a dispersed suspension of negatively charged laponite particles. First, we quantify adsorption, i.e. the amount of adsorbed molecules per gram of dried solid. Then, we show that contrast variation experiments under controlled conditions along the adsorption isotherm of the surfactant on dispersed laponite particles allow to determine the average thickness of a nonionic surfactant layer adsorbed on a solid anisotropic particle.
PACS: 61.80.Hg – Neutron radiation effects / 68.10.Jy – Kinetics (evaporation, adsorption, condensation, catalysis, etc.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999