Interaction of aliphatic diamines with vermiculite in aqueous solution

Abstract Vermiculite was reacted with aliphatic diamines (ethyl-, propyl-, butyl- and hexyldiamines). The products were characterized by elemental analysis, infrared spectroscopy and X-ray diffraction. The amounts of amines adsorbed were 0.89, 0.86, 0.79, and 0.68 mmol g − 1 , respectively, for NH 2 (CH 2 ) 2 NH 2 where n  = 2, 3, 4, 6. The basal spacings of the intercalated vermiculites varied between 1.28 and 1.47 nm.