物理化学学报 >> 2006, Vol. 22 >> Issue (05): 548-551.doi: 10.1016/S1872-1508(06)60020-X

研究论文 上一篇    下一篇

有机阳离子[C18mim]在蒙脱土层间的物理化学吸附与聚集状态*

丁运生;王僧山;查敏;王志刚   

  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;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
  • 收稿日期:2005-11-07 修回日期:2005-12-09 发布日期:2006-04-28
  • 通讯作者: 丁运生 E-mail:dingys@hfut.edu.cn

Adsorption and Aggregative Structures of an Organic Cation [C18mim] of the Ionic Liquid in the Interlayer of Montmorillonite

Ding Yun-Sheng;Wang Seng-Shan;Zha Min;Wang Zhi-Gang   

  1. Department of Polymer Materials and Engineering, College of Chemistry and Engineering, Hefei University of Technology,Hefei 230009, P. R. China; CAS Key Laboratory of Engineering Plastics, Joint Laboratory of Polymer Science and Materials,Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China
  • Received:2005-11-07 Revised:2005-12-09 Published:2006-04-28
  • Contact: Ding Yun-Sheng E-mail:dingys@hfut.edu.cn

摘要: 咪唑基离子液体(N鄄十八烷基鄄N忆鄄甲基溴化咪唑盐[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.

关键词: 离子液体, 蒙脱土, 吸附, 聚集态结构

Abstract: 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 [C18mim]+ in the interlayer ofMMThave been investigated by thermogravimetric analysis (TGA), wide-angle X-ray diffraction (XRD), and Fourier transforminfrared 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.

Key words: Ionic liquid, Montmorillonite, Absorption, Aggregative structure