1-乙基-3-甲基咪唑丙氨酸盐离子液体的低温热容研究
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摘要
本文合成了1-乙基-3-甲基咪唑丙氨酸盐离子液体,并通过核磁共振氢谱(~1H NMR)和差示扫描量热仪(DSC)对其进行了表征,确定合成了目标产物.热重分析(TGA)测试结果显示1-乙基-3-甲基咪唑丙氨酸盐离子液体的初始分解温度约为473.15 K,说明该离子液体具有较好的热稳定性.以低温绝热量热仪测试了该离子液体在80～400 K温区下的低温热容,将实验热容值拟合处理,得到了1-乙基-3-甲基咪唑丙氨酸盐离子液体固液相区的热容多项式方程,并通过热容多项式计算了该离子液体在298.15～400 K的焓值、熵值以及吉布斯自由能.
The 1-ethyl-3-methyl imidazolium alanine ionic liquid was synthesized and characterized by nuclear magnetic resonance(~1 H NMR) and differential scanning calorimetry(DSC). The TGA results showed the initial decomposition temperature of 1-ethyl-3-methyl imidazolium alanine ionic liquid was about 473.15 K, which indicated that the ionic liquid has relatively good thermal stability. The low-temperature heat capacity data of 1-ethyl-3-methyl imidazolium alanine ionic liquid were tested by a low-temperature adiabatic calorimeter at the temperature range from80 to 400 K. The solid liquid phase polynomial equations of 1-ethyl-3-methyl imidazolium alanine ionic liquid were obtained by fitting experimental heat capacity data. And the thermodynamic functions of the compound in the experimental temperature range were also calculated.
The 1-ethyl-3-methyl imidazolium alanine ionic liquid was synthesized and characterized by nuclear magnetic resonance(~1 H NMR) and differential scanning calorimetry(DSC). The TGA results showed the initial decomposition temperature of 1-ethyl-3-methyl imidazolium alanine ionic liquid was about 473.15 K, which indicated that the ionic liquid has relatively good thermal stability. The low-temperature heat capacity data of 1-ethyl-3-methyl imidazolium alanine ionic liquid were tested by a low-temperature adiabatic calorimeter at the temperature range from80 to 400 K. The solid liquid phase polynomial equations of 1-ethyl-3-methyl imidazolium alanine ionic liquid were obtained by fitting experimental heat capacity data. And the thermodynamic functions of the compound in the experimental temperature range were also calculated.
引文
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2 Su P,Wu W,Gao X,Dai S,Zhao W,Meng Z.J Nanjing Normal Univ(Eng Technol Ed),2016,1:53-60(in Chinese)[苏鹏飞,吴薇,高旭娜,戴苏洲,赵文杰,孟志军.南京师范大学学报(工程技术版),2016,1:53-60]
3?ztürk HH.Energy Convers Manage,2005,46:1523-1542
4 Paul TC,Morshed AKMM,Fox EB,Visser AE,Bridges NJ,Khan JA.Exp Therm Fluid Sci,2014,59:88-95
5 Valkenburg MEV,Vaughn RL,Williams M,Wilkes JS.Thermochim Acta,2005,425:181-188
6 Bai L,Zhu J,Chen B.Fluid Phase Equilib,2011,312:7-13
7 Sharma A,Tyagi VV,Chen CR,Buddhi D.Renew Sustain Energy Rev,2009,13:318-345
8 Zhang Q.Synthesis and study on the physico-chemical properties of the acetic acid and alanine series of ionic liquids.Dissertation for the Master Degree.Liaoning:Liaoning University,2014(in Chinese)[张秋波.醋酸离子液体和丙氨酸离子液体的合成及物理化学性质的测定.硕士学位论文.辽宁:辽宁大学,2014]
9 Zhuo K,Ren H,Wei Y,Chen Y,Ma J.J Chem Eng Data,2014,59:640-648
10 Li N,Du W,Huang Z,Zhao W,Wang S.Chin J Catal,2013,34:769-780(in Chinese)[李娜,杜伟燕,黄卓楠,赵炜,王寿江.烷基咪唑离子液体对脂肪酶催化酯水解反应活性的影响.催化学报,2013,34:769-780]
11 Wang Z,Xi J,Kong L,Zuo Y.J Mol Catal(China),2016,30:354-362(in Chinese)[王志成,习海玲,孔令策,左言君.分子催化,2016,30:354-362]
12 Zhang S.Study on the thermodynamic properties of the interaction between ionic liquids and molecular solvents.Dissertation for the Master Degree.Xinxiang:Henan Normal University,2006(in Chinese)[张社利.离子液体与分子溶剂相互作用的热力学研究.硕士学位论文.新乡:河南师范大学,2006]
13 Zhan C,Xi W,Wang H,Wang Y,Ruan H.Appl Chem Ind,2016,45:1736-1738(in Chinese)[詹长娟,徐伟,王华,王翼,阮浩强.应用化工,2016,45:1736-1738]
14 Guo YG,Huang BH,Shi N,Ma XZ,Huo YP,Zhou JH,Zhang K.Appl Mech Mater,2013,291-294:379-382
15 Nishimura N,Ohno H.6 DNA Ionic Liquid.Materials Science of DNA.Boca Raton:CRC Press,2011.163-178
16 Wei J.Study on enthalpy of vaporization,polarity and molar surface gibbs free energy for ionic liquids.Dissertation for the Doctoral Degree.Liaoning:Liaoning University,2006(in Chinese)[魏杰.离子液体汽化焓、极性和摩尔表面Gibbs自由能研究.博士学位论文.辽宁:辽宁大学,2016]
17 Gu ZG,Wang BX,Pang CY,Zhou W,Li Z.Acta Chim Sin,2012,70:2501-2506(in Chinese)[顾志国,王宝祥,庞春燕,周文,李在均.化学学报,2012,70:2501-2506]
18 Wei J,Chang C,Zhang Y,Hou S,Fang D,Guan W.J Chem Thermodyn,2015,90:310-316
19 Fang DW,Guan W,Tong J,Wang ZW,Yang JZ.J Phys Chem B,2008,112:7499-7505
20 Tong J,Sun YC,Fang DW,Yang J.Chem J Chin Univ,2009,30:1210-1213(in Chinese)[佟静,孙迎春,房大维,杨家振.高等学校化学学报,2009,30:1210-1213]
21 Ben Ghanem O,Mutalib MIA,Lévêque JM,Gonfa G,Kait CF,El-Harbawi M.J Chem Eng Data,2015,60:1756-1763
22 Xue WF.Environment-friendly material:study on the thermodynamic properties of amino acid ionic liquids.Dissertation for the Master’s Degree.Liaoning:Liaoning University,2009[薛伟锋.环境友好材料:氨基酸离子液体的热力学性质研究.硕士学位论文.辽宁:辽宁大学,2009]
23 Shi Q.Study on the precise automatical adiabatic calorimetry in the temperature range from 80K-400K.Dissertation for the Doctoral Degree.Beijing:Graduate University of Chinese Academy of Sciences,2008[史全.80~400 K温区精密自动绝热量热学研究.博士学位论文.北京:中国科学院研究生院,2008]