二次柱撑蒙脱石的制备及表征

采用单链季铵盐对蒙脱石进行一次柱撑改性的基础上,再用双链季铵盐对一次柱撑蒙脱石进行二次柱撑改性,制备了系列蒙脱石样品,探讨了不同阳离子交换容量柱撑剂对蒙脱石二次柱撑改性的影响。用X射线衍射仪、Fourier红外光谱仪以及热重分析仪对样品进行表征,结果表明:二次柱撑蒙脱石层间距在一次柱撑基础上继续增大,这说明双链季铵盐进入了一次柱撑蒙脱石层间,达到了二次柱撑的效果。

Preparation and Characterization of Secondarily-Intercalated Montmorillonite

On the basis of modifying Na-montmorillonite with single-chain quaternary ammonium, prepared secondarily-intercalated montmorillonite by double-stranded quaternary ammonium.The influence of different cation exchange capacity (CEC) of agents on the organic intercalation was explored. The prepared samples were characterized by the X-ray diffraction, Fourier-transform infrared and thermo gravimetric differential thermal analysis. Results show that the basal spacing of secondarily-intercalated montmorillonite increased with the CEC of intercalation agents, and double-stranded quaternary ammonium was intercalated into the montmorillonite, which played an important role in the increasing of interlamellar space.