Study on Hydrazine Intercalation of Kaolinite (I)——effect of Hydrazine Concentration on Intercalation

The effect of hydrazine concentration on the intercalation rate is investigated as the Maoming kaolinite is intercalated by hydrazine. It has been found that there exist a low threshold and optimized value of hydrazine concentration for the kaolinite intercalation. In addition to the common space 1.04 nm, a new interlayer space distance 0.97 nm, was observed when the kaolinite was intercalated by high concentration hydrazine (≥24 mol/L). The appearance of such new space is attributed to keying of the —NH 2 moiety of hydrazine into the siloxane ditrigonal cavity, according to infrared spectroscopy.