BONDING AND ORIENTATION OF BENZAMIDE IN KAOLINITE-BENZAMIDE INTERCALATION

The structures of the two types of kaolinite and their benzamide intercalation compounds were characterized by the powder X-ray diffraction and Fourier-transformed infrared spectroscopy. The results show the basal spacing of the kaolinite-benzamide inter- calation compound expands to 1.437 nm and 1.444 nm respectively, and the benzamide molecules both adopt a perpendicular stance between the layers of kaolinite, but the states of the intercalation are different. The inner-surface hydroxyls of the kaolinite form hy- drogen bonds with both the amino groups and carbonyl groups in the Foshan kaolinite-benzamide intercalation compound, but the amino groups in the Suzhou compound form sufficient bonds, with the benzamide moleculaes partly are embedded into the ditrigonal hole of kaolinite.