Synthesis and characterisation of calixarene-stabilised calcium carbonate overbased detergents

摘要

Anew mixed calixarate/stearate calcium carbonate overbased detergent has been prepared and characterised by H-1 NMR, C-13 NMR, IR, Raman and UV-Vis spectroscopic methods. In addition, Langmuir trough and dynamic light scattering experiments have been carried out. These are interpreted in terms of a calcium stearate- and calcium calixarate-stabilised CaCO3 particle of ca. 6 nm diameter; there is evidence for a reservoir of excess surfactant inverse micelles. (C) 2003 Elsevier B.V. All rights reserved. [References: 18]