铬簇合物及铬铝交联蒙脱石纳米复合材料的形成

利用XRD、IR、DTA、比表面和吸氨量等方法研究2:1型的蒙脱石粘土矿物和铬簇合物Cr3O(OOCCH3)6(OH2)3]Cl·6H2O(简记为CrC)交联剂的层间交联作用,并对铬铝交联蒙脱石纳米复合材料的制备方法、影响因素和性质作初步探讨.结果表明,交联剂分子种类、大小和Cr/Al比值对材料的层间距大小有十分重要的影响;而材料层间距大小、交联剂CrC/土的比例和Cr/Al比值则是影响材料的表面性质和热稳定性的重要因素.

Formation of Cross-Linking Montmorillonite Nanocomposites by Adopting Chromium Compound

The interlayered cross-linking of a 2:1 type montmorillonite with chromium cluster compoundCr30(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.