Preparation and characterization of intercalated kaolinite with: Urea,dimethyl formamide and an alkylammonium saltusing guest displacement reaction

In recent years,authors are interested largely to the cation exchange method for modifying kaolinite clay using intercalation reaction. the purpose of this study is to do a comparison between kaolinite intercalates per formed with dmf and urea using guest displacement method in which new guest species alkylammonium salts can be intercalated between the layers of kaolinite by displacing previous species urea and dmf. untreated and treated kaolinite samples were examined by x-ray diffraction (xrd) and fourier transform infrared spectroscopy (ftir). the xrd spectra showed that the peak at 10.72å increases in urea/kaolin complex,and the kaolinite/dmf complex was characterized by the same basal distance (d001),but the treatment with the ammonium salt caused the return to the initial state of the clay. also,ftir results confirmed the hydrogen bonding between urea and kaolin which showed the occurrence of a partial delamination during dry milling of kaolin with urea and kaolinite,but no new bands were detected in the kaolinite/dmf complex,also after the treatment with alkyl ammonium salt two new adjacent bands were observed in both cases characterizing the vibrations of symmetric and asymmetric valence of the c-h bonding. the displacement reaction is the most efficient way to expand the interlayer spacing of kaolinite. © 2017,university of mohammed premier oujda morocco.