The activated clay was modified by using surfactant cetyl trimethyl ammonium bromide( CTAB)as modifier. Furthermore,the activated clay / chitosan composite was prepared by using the modified activated clay and chitosan as intial materials where the quantitative silane coupling agent was added into the reaction system to modify the activated clay. As-obtained composite was characterized by infrared spectrometer( FTIR),thermogravimetric analyzer( TG),X-ray diffraction( XRD) and transmission electron microscop...