咪唑类离子液体热不稳定性的试验研究  

Experimental study on thermal instability of imidazolium ionic liquids

作　　者：王干 郑忠宇 段玮嘉 潘勇[1] WANG Gan;ZHENG Zhongyu;DUAN Weijia;PAN Yong(Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control,Nanjing Tech University,Nanjing Jiangsu 211816,China)

机构地区：[1]南京工业大学危险化学品本质安全与控制技术江苏省重点实验室,江苏南京211816

出　　处：《中国安全科学学报》2021年第4期163-170,共8页China Safety Science Journal

基　　金：国家自然科学基金资助(51974165);江苏省自然科学基金杰出青年基金资助(BK20190036)。

摘　　要：为了进一步明确离子液体的热行为,试验研究离子液体在受热条件下可能存在的热分解、闪燃等热不稳定特性,分别采用同步热分析仪和闭口闪点仪测定16种咪唑类离子液体的热分解温度和50种咪唑类离子液体的闪燃温度等热不稳定特性指标。结果表明:咪唑类离子液体的闪燃温度与其阴、阳离子的结构和种类有关,阴离子对闪燃温度的影响较大;闪燃温度还受到阴阳离子间相互作用的影响,即受到离子的几何结构、大小和电荷分布的影响;咪唑类离子液体受热后的闪燃与热分解之间不存在明显的先后关系,都是其受热后分解产生的可燃物遇点火源发生闪燃。In order to further clarify thermal behavior of ionic liquids,experimental study was performed on their thermal instability,such as thermal decomposition and flashover,under heated conditions.Synchronous thermal analyzer and closed flash point tester were used to measure thermal decomposition temperature of 16 kinds of imidazolium ionic liquids and flash temperature of 50 kinds of them.The results show that flash temperature of imidazolium ionic liquids is related to structures and types of anions and cations with the former exerting a greater impact,and it is also affected by interaction between them,which stands for geometrical structure,size and charge distribution of ions.Moreover,there is no obvious sequence between flashover and thermal decomposition of imidazolium ionic liquids after heating,and flashover happens when combustible products generated from decomposition meet ignition sources.

关 键 词：咪唑类离子液体 热不稳定性 热分解温度 闪燃温度 离子间相互作用 

分 类 号：X937[环境科学与工程—安全科学]