论文部分内容阅读
以钠基蒙脱土和有机蒙脱土为研究对象,分别利用29Si魔角旋转核磁共振谱(29Si MASNMR)、1H-29Si交叉极化/魔角旋转核磁共振谱(1H-29Si CP/MAS NMR)和1H魔角旋转核磁共振谱(1H MAS NMR)对蒙脱土的纯度、蒙脱土片层间的有机插层反应、有机-无机界面相互作用、蒙脱土界面硅原子的受限运动以及有机改性剂的结构等进行了研究。实验结果表明,具有丰富质子自旋的有机改性剂十八烷基三甲基溴化铵已经进入蒙脱土(MMT)的层间,并与蒙脱土片层存在强相互作用,使其空间运动受到阻碍,偶极作用增强。
Using sodium montmorillonite and organic montmorillonite as the research objects, 29Si MASNMR, 1H-29Si cross-polarization / magic angle rotatory nuclear magnetic resonance spectroscopy (1H-29Si CP / MAS NMR ) And 1H magic angle NMR spectroscopy (1H MAS NMR) on the purity of montmorillonite, the organic intercalation reaction between montmorillonite layers, the organic-inorganic interface interaction, the limited movement of silicon atoms at the interface of montmorillonite As well as the structure of organic modifiers and so on. The experimental results show that octadecyltrimethylammonium bromide, an organic modifier with rich proton spins, has entered the interlayer of montmorillonite (MMT) and strongly interacts with the montmorillonite. Space movement is obstructed and dipole action is enhanced.