1-烯丙基-3-甲基咪唑二氰胺盐的热稳定性和平衡蒸汽压研究  

Thermal Stability and Equilibrium Vapor Pressure of 1-Allyl-3-methylimidazolium dicyanamide

作　　者：梁蕊[1] 王晓燕[1] 杨美荣[1] 轩小鹏[1] 

机构地区：[1]河南师范大学化学与环境科学学院,新乡453007

出　　处：《化学通报》2012年第9期815-819,共5页Chemistry

基　　金：国家自然科学基金项目(20703014);河南省杰出青年基金项目(074100510005)资助

摘　　要：利用非等温、等温热重分析法,研究了高纯氮气气氛下1-烯丙基-3-甲基咪唑二氰胺盐([amim][N(CN)2])的热稳定性和平衡蒸汽压。非等温热重分析表明,其初始分解温度为551 K,而长期热重分析研究结果表明,[amim][N(CN)2]的最高可使用温度约为443 K。另外,利用基于热重的蒸发技术研究了该盐的平衡蒸汽压(Pe)与温度的关系并计算了标准蒸发焓。在423～473 K范围内,其Pe和温度的关系是:lgPe=14±1+(-(4.848±0.156)×103/T)。本文的结果为离子液体在高温下使用提供了理论依据。Thermal stability and equilibrium vapor pressure of 1-allyl-3-methylimidazolium dieyanamide （[amim] [ N （CN）2 ] ） were investigated by using both non-isothermal and isothermal thermogravimetric analysis （TGA） under high pure nitrogen as carrier gas. The non-isothermal TGA curve showed that the onset decomposition temperature was 551 K. However, the long-term isothermal TGA studies revealed that its highest use temperature should be 443 K. Moreover, the temperature dependence of the equilibrium vapor pressure and the standard enthalpy of vaporization of [amim] [ N（CN）2 ] were also investigated by TG-based transpiration.. In the temperature range of 423 -473K, the relationship between the equilibrium vapor pressure （Po） and temperature was lgPs = 14 ± 1 ＋ - （4. 848 ±0.156） × 103 The results provided a theoretical basis for the usage of ionic liquid at high T temperature.

关 键 词：离子液体 热稳定性 平衡蒸汽压 

分 类 号：O621.25[理学—有机化学]