蛭石的热双氧水膨胀性和有机插层性能研究

Investigation of Thermal Chemical Expantion Performance and Organic Intercalation Technique on Vermiculite

采用XRD、IR等分析手段进行了工业蛭石的热双氧水化学膨胀性及用十六烷基三甲基溴化铵(HDTMA.B r)为插层剂的蛭石的有机插层性能研究。结果表明:30%浓度的双氧水使蛭石层间距由1.46 nm增大到2.68 nm,膨胀效果显著;在240%(质量分数)CEC(阳离子交换容量)的HDTMA.B r加入量、加热温度80℃、保温时间0.5 h的最佳有机插层条件下,原样蛭石层间距从1.46 nm增加到4.32 nm,膨胀蛭石由2.68 nm增加到4.36 nm,表明经双氧水膨胀后的蛭石插层效果更显著。

In this article, the expansion performance of the industry vermiculite was performed by using heat hydrogen peroxide solution, and gained the best conditions for expansion. Subsequently, we used HDTMA ·Br for intercalation reagent to study the intercalation properties of vermiculite. All the species were characterized by analysis of SEM, XRD, IR. The result indicates that, the vermiculite layer space increases from 1.46 nm to 2.61 nm and the inflation effect is remarkable. The vermiculite and the expanded vermiculite inserted experiment shows that vermiculite layer space increase from 1.46 nm to 4.32 nm and the vermiculite exerted above increase from 2.68 nm to 4.36 nm under conditions of 240 % CEC （Cation Exchange Capacity ）for HDTMA ·Br content, at heat temperature 80℃ and reaction time 0.5 h, which demonstrates that the intercalation effect of vermiculite expanded by hydrogen peroxide solution is better than industrial vermiculite.