Chin.J.Chem.Eng. ›› 2016, Vol. 24 ›› Issue (3): 331-338.DOI: 10.1016/j.cjche.2015.11.024


Measurement of thermal conductivity, viscosity and density of ionic liquid [EMIM][DEP]-based nanofluids

Hua Xie1, Zongchang Zhao1, Jianhua Zhao1, Hongtao Gao2   

  1. 1 School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China;
    2 Institute of Marine Engineering and Thermal Science, Dalian Maritime University, Dalian 116026, China
  • Received:2015-06-30 Revised:2015-09-27 Online:2016-04-08 Published:2016-03-28
  • Supported by:

    Supported by the National Natural Science Foundation of China(51376036).

Abstract: This article studied experimentally the effect ofmulti-wall carbon nanotubes(MWCNTs) on the thermo physical properties of ionic liquid-based nanofluids.The nanofluids were composed of ionic liquid, 1-ethyl-3-methylimidazolium diethylphosphate [EMIM][DEP], or its aqueous solution [EMIM][DEP](1)+H2O(2) and MWCNTs without any surfactants.The thermal conductivity, viscosity and density of the nanofluids were measured experimentally.The effects of the mass fraction of MWCNTs, temperature and the mole fraction of water on the thermo physical properties of nanofluids were studied.Results show that the thermal conductivity of nanofluids increaseswithin the range of 1.3%-9.7% compared to their base liquids, and have a well linear dependence on temperature.The viscosity and density of the nanofluids exhibit a remarkable increase compared with those of the base liquids.Finally, the correlation of the effective thermal conductivity and viscosity of the nanofluids was made using the models in the literatures.

Key words: Nanofluid, Multi-wall carbon nanotubes, Thermal conductivity, Viscosity, Density