Intercalation of montmorillonite based on dendritic quaternary ammonium: preparation and characterization

摘要

Three generations of dendritic quaternary ammonium (G1, G2 and G3) were intercalated into montmorillonite (MMT) layered silicates. X-ray diffraction (XRD) and transmission electron microscopy (TEM) indicate that the respective intercalations of dendrimer/MMT hybrids exhibited organized characteristics, and the interlayer spacings were 2.83, 2.62 and 2.89 nm for G1/MMT, G2/MMT and G3/MMT, respectively. Moreover, the preparation of dendrimer/MMT hybrids was investigated at different dendrimer/MMT molar ratios regarding the changes of interlayer distance, revealing a conformation change of the intercalating dendrimers. The dendritic structure with low molecular weight (G1) could effectively intercalate the layered silicates and enlarge the basal spacing to 2.83 nm.