Formation of Cross-Linking Montmorillonite Nanocomposites by Adopting Chromium Compound

The interlayered cross-linking of a 2:1 type montmorillonite with chromium cluster compound[Cr30(OOCCH3)6(OH2)3]Cl-6H2O (namely CrC) was studied by X-ray diffraction, infrared analysis, differential thermal analysis, specific surface and ammonia adsorption measurement. Its preparation method, various influencing factors and some physical and chemical properties were also dealt with. As indicated by the results, the synthesis conditions such as species, size and Cr/Al molecular ratio of cross-linking agent greatly affect an interlayer space(d001); whereas an interlayer space of nanocomposite, CrC/clay ratio and Cr/Al molecular ratio of cross-linking agent play a very important role, influencing on surface properties and thermal stability of cross-linking montmorillonite nanocomposites.