Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (10): 2157-2161.doi: 10.3866/PKU.WHXB201307293


Density, Viscosity and Conductivity of Protic Ionic Liquid N,N-DimethylethanolammoniumPropionate

LI Chang-Ping1, LI Zhuo1,3, ZOU Ben-Xue2, LIU Qing-Shan2, LIU Xiao-Xia2   

  1. 1 College of Chemical Engineering and Environment, Dalian University, Dalian 116622, Liaoning Province, P. R. China;
    2 Department of Chemistry, Northeastern University, Shenyang 110819, P. R. China;
    3 Scholl of Sciences, Dalian Ocean University, Dalian 116023, Liaoning Province, P. R. China
  • Received:2013-05-21 Revised:2013-07-29 Published:2013-09-26
  • Contact: LIU Qing-Shan, LIU Xiao-Xia;
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21176033, 21006007, 21203193, 21273029) and Research Foundation for the Doctoral Programof Higher Education of China (20120042110024).


The density, viscosity, and conductivity of protic ionic liquid (PIL) N,N-dimethylethanolammonium propionate (DMEOAP) were determined in the temperature range of 283.15-333.15 K. The influence of temperature on density, viscosity, and conductivity is discussed. The thermal expansion coefficient, molecular volume, standard molar entropy, and lattice energy of DMEOAP were calculated using empirical and semiempirical equations. The molar conductivity of DMEOAP was determined fromdensity and conductivity data. The temperature dependence of viscosity and conductivity data was fitted using the Vogel-Fulcher-Tammann (VFT) equation. The relationship between molar conductivity and viscosity was determined by the Walden rule.

Key words: Protic ionic liquid, Density, Viscosity, Conductivity