Abstract: The silane grafted kaolinite was prepared by the wet milling mechanochemical technique.XRD, FT-IR, scanning electron microscopy and physical adsorption technique were employed to characterize the wet milled kaolinite and silane modified samples.The crystal structure and size were calculated according to HI index and Scherrer method.The results show that the staked kaolinite sheets are peeled into fine particle sheets by the wet milling, the crystal structure changes to much more disordered, the stacking body is stripped into tiny kaolinite layer, and the grain size is significantly reduced.Fourier transform infrared spectroscopy confirmes the existence of-CH3,-CH2-, C=O and Si-C from silane agent for the wet milling silane modified kaolinte rather than the directrly silane modified samples.

Key words: kaolinite;silane;wet milling;mechanochemistry