2,4,6-三(二甲胺基甲基)苯酚有机改性蒙脱土

以2,4,6-三(二甲胺基甲基)苯酚(DMP-30)作为插层剂, 采用阳离子交换法对钠基蒙脱土进行了有机改性; 研究了DMP -30与盐酸的摩尔比对蒙脱土有机改性效果的影响; 采用SEM、 TEM、 IR和XRD等对样品的微观形貌和结构进行了表征。结果表明: DMP-30与盐酸的摩尔比对蒙脱土有机改性具有明显的影响, 在合适的摩尔比(1 ∶ 2)时, DMP-30分子插入到蒙脱土片层间, 片层间距由1.34nm 增加至1.81nm。对改性后蒙脱土与环氧基体的复合效果进行了研究, 结果显示, 复合材料中蒙脱土的d₀₀₁衍射峰消失, 表明有机改性蒙脱土在环氧树脂基体中得到了充分剥离。 

On the organic modification of Na-montmorillonite by 2,4,6-tris-phenol

Na-montmorillonite was organically modified by the cationic exchange method using 2, 4, 6-tris-(dimethylaminomethyl) phenol (DMP-30) as the modifier. The influence of the molar ratio of DMP-30 to HCl was stu-died on the organic treatment of Na-montmorillonite. The morphologies and structures of the as-obtained samples were characterized by SEM, TEM, IR and XRD. The results show that at a proper molar ratio (1 ∶ 2) of DMP-30 to HCl, the DMP-30 molecules are successfully intercalated into the layers of montmorillonite, and the space of organically modified montmorillonite layers increases from 1.34nm to 1.81nm. Nanocomposites were prepared by the in situ polymerization of epoxy resins in the presence of the organo-modified montmorillonite (OMMT). The structure of the nanocomposites was studied by XRD. The d001 peak of the organic montmorillonite disappeared, indicating that the organo-modified montmorillonite was completely exfoliated in the epoxy matrix.