金云母结构修饰及有机改性实验

用酸处理及热处理+钠化综合方法,对金云母进行了结构修饰,得到具有低剩余层电荷的金云母,用十六烷基三甲基溴化铵(HDTMAB)对结构修饰金云母进行了有机插层改性。利用X射线衍射、化学成分分析、差热等方法对制得的样品进行了表征。研究了硝酸用量对金云母层间剩余负电荷的影响。结果表明,随着硝酸用量的增加,金云母阳离子交换容量和层间剩余负电荷逐渐减小;硝酸用量也影响有机分子在金云母层间的插层行为,当硝酸用量为100 mL时,有机分子烷基链在层间呈双层倾斜排列;当硝酸用量为150 mL时,烷基链在层间呈单层倾斜排列。

Stucture Modification and Organic Intercalation of Phlogipite

The phlogopite from Hebei Province,China,was submitted to an acid treatment followed by calcinations.These structure modification treatments lead to a permanent reduction of the high net negative charge of the mineral layers.The solid is converted to the sodium form by ion exchange and organic intercalated with HDTMAB.XRD patterns show that the interlayer spacing of the organic modified phlogopite and CEC of the modified phlogopite are antiproportional to the amount of nitrate used in the structure modification.