SANS structural determination of a nonionic surfactant layer adsorbed on clay particles
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چکیده
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,
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تاریخ انتشار 1998