有机阳离子[C_(18)mim]^+在蒙脱土层间的物理化学吸附与聚集状态  

Physico Chemical Adsorption and Aggregative Structures of the Organic Cation [C_(18)mim]^+ in the Interlayer of Montmorillonite

作　　者：丁运生[1] 王僧山[1] 查敏[1] 王志刚[2] 

机构地区：[1]合肥工业大学化学工程学院高分子材料与工程系,合肥230009 [2]中国科学院化学研究所高分子科学与材料联合实验室工程塑料中国科学院重点实验室,北京100080

出　　处：《物理化学学报》2006年第5期548-551,共4页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金重大项目(10590355);安徽省自然科学基金(50440905);合肥工业大学博士专项基金(106-035013);中国科学"院百人计划"专项基金资助

摘　　要：咪唑基离子液体(N-十八烷基-N′-甲基溴化咪唑盐[C18mim]Br)中的[C18mim]+可以通过离子交换反应进入蒙脱土层间.本文用TGA、FTIR和XRD研究了[C18mim]+在蒙脱土层间的物理和化学吸附及其聚集状态.研究结果表明,蒙脱土存在着饱和的化学吸附量,其总吸附量随物理吸附量的增加而增加;随着[C18mim]+在蒙脱土层间吸附量的增加,其聚集态结构的有序性增加,并伴有分子链的构象变化,导致层间距的增加.An organic cation [C18mim]^＋ formed from [C18mim]Br, one type of ionic liquids, can go into the interlayer of sodium montmorillonite （MMT） through the ion-exchanging reaction. The adsorption state, the adsorption amount, and the aggregative structure of[C81mim]^＋ in the interlayer of MMT have been investigated by thermogravimetric analysis （TGA）, wide-angle X-ray diffraction （XRD）, and Fourier transform infrared spectroscopy （FTIR）. The results indicated that there is a maximum chemical adsorption of [C18mim]^＋ in the interlayer of MMT, but the total amount of adsorbed [C18mim]^＋ in the interlayer of MMT increases with the physical adsorption of [C18mim]^＋. With the increasing amount of adsorbed [C18mim]^＋ in the interlayer of MMT, the aggregative structures of [C18mim]^＋ become more ordered, leading to an obvious increase of the interlayer distance of MMT.

关 键 词：离子液体 蒙脱土 吸附 聚集态结构 

分 类 号：O647.3[理学—物理化学] O611.3[理学—化学]