物理化学学报 >> 2004, Vol. 20 >> Issue (12): 1465-1468.doi: 10.3866/PKU.WHXB20041213

研究简报 上一篇    下一篇

1-正丁基-3-甲基咪唑溴化物离子液体TGA-FTIR研究

李雪辉; 张磊; 李琼; 耿卫国; 叶玉嘉; 王乐夫   

  1. 华南理工大学化学工程系,广州　510640
  • 收稿日期:2004-05-12 修回日期:2004-07-13 发布日期:2004-12-15
  • 通讯作者: 李雪辉 E-mail:cexhli@scut.edu.cn

TGA-FTIR Study of 1-n-butyl-3-methylimidazolium Bromide Ionic Liquid

Li Xue-Hui; Zhang Lei; Li Qiong; Geng Wei-Guo; Ye Yu-Jia; Wang Le-Fu   

  1. Department of Chemical Engineering, South China University of Technology, Guangzhou　510640
  • Received:2004-05-12 Revised:2004-07-13 Published:2004-12-15
  • Contact: Li Xue-Hui E-mail:cexhli@scut.edu.cn

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摘要： 利用TGA-FTIR技术,研究了空气及氮气气氛下1-正丁基-3-甲基咪唑溴化物的热性能.结果表明,在不同的气氛下,在离子液体的沸点附近,存在一定的蒸汽压,随着温度的升高,1-正丁基-3-甲基咪唑溴化物主要以蒸气的形式汽化.在离子液体汽化过程中,未观察到离子液体发生明显的分解现象.在受热过程中,离子液体可能发生碳化作用,在空气气氛中,离子液体可能发生氧化作用,并且,离子液体的碳化速率与氧化速率基本接近.随着温度的升高,离子液体的氧化及碳化产物被进一步深度氧化.

关键词: 离子液体, 　1-正丁基-3-甲基咪唑溴化物, 　热分析（TGA), 　傅立叶变换红外光谱（FTIR), 　TGA-FTIR

Abstract: Under the atmosphere of air and nitrogen, the thermal properties of 1-n-butyl-3-methylimidazolium bromide ionic liquid were studied with TGA-FTIR technique. Experimental results showed that the ionic liquid had certain vaporization pressure around its boiling point. This ionic liquid was mainly evaporated with increasing scanning temperature and no obvious decomposition was observed during the vaporization process. In the process of TGA, carbonization may occur. At the same time, oxidation may occur under the air atmosphere and the rates of carbonization and oxidation were nearly the same. In higher temperature, the carbonization and oxidation products were oxidized thoroughly.

Key words: Ionic liquid, 　1-n-butyl-3-methylimidazolium bromide, 　TGA, 　FTIR, 　TGA-FTIR