The functionalization of bentonite by intercalation of surfactants dodecylamine, hexadecylamine, octadecylamine, and the octadecyltrimethylammonium cation is described. Products are characterized by elemental analysis, thermal analysis, FT–IR spectra, and powder X-ray diffraction analysis. Laminar amine-clay nanocomposites contain about one mol amine per (Si,Al)4 clay unit, while the cationic s...