Study on the Preparation of Organic Modified Montmorillonite

In order to improve the compatibility between montmorillonite and the organic, The preparations of organic modified montmorillonite were studied, with cetyl trimethyl ammonium bromide (CTAB) being intercalated into the layered silicate montmorillonite by cation exchange. The effects, on the ionic exchange rate, of mass ratio of the reactants, reaction time and reaction temperature were discussed. The optimum technics of preparation was analyzed. Their structure were characterized by XRD, IR result shows that CTAB has intercalated into the layers of montmorillonite, and the spacing of organic modified montmorillonite layers have increased from 1.45nm to 1.96nm. Therefore organic modified montmorillonite has high exchange capability and large spacing of layers.