Reason for Ionic Liquids to be Combustible
Recently,ionic liquids were verified to be combustible instead of nonflammable; the contrary was thought to be true due their extremely low vapor pressure.Flash point is one of the most important variables used to characterize the fire and explosion hazards of liquids.Because of extremely low vapor pressure and decomposition at elevated temperatures,the reason for ionic liquids to be combustible should be different from that of traditionally defined liquids.The flash point of ionic liquids in relation to their decomposition was investigated in this study by the estimation of vapor pressure and by use of thermogravimetric analysis (TGA),differential scanning calorimetry (DSC),Fourier transform infrared spectroscopy (FTIR),and flash point analyzer apparatus.The ionic liquids 1-ethyl-3-methylimidazolium ethylsulfate (EmimEtSO4),1-hexyl-3-methylimidazolium chloride (C6mimCl) and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BmimNTf2),were selected as test examples.Results revealed that the flammability of ionic liquids was mainly attributed to the decomposition of the ionic liquids generating flammable substances instead of themselves vaporizing,as do traditionally defmed combustible/flammable liquids.
ionic liquids flash point decomposition flammability thermogravimetric analysis
Horng-Jang LIAW Shih-Kai HUANG Hao-Ying CHEN Sheng-Nan LIU
Department of Occupational Safety and Health,China Medical University,Taichung,Taiwan,China Bureau of Standards,Metrology,and Inspection,Ministry of Economic Affairs,Taipei,Taiwan,China
国际会议
2012 International Symposium on Safety Science and Technology (2012安全科学与技术国际会议)
南京
英文
502-506
2012-10-23（万方平台首次上网日期，不代表论文的发表时间）