The Scientific World Journal

Research Article

High Bulk Modulus of Ionic Liquid and Effects on Performance of Hydraulic System

Table 9

Chemical-physical characteristics of tested fluids.
PropertyMethod (unit)Sample
IL-EMIM-EtSO4Mineral oil VG 46Quintolubric 888-68
Density/15°CISO 12185 (g/cm3)1,2410,871/
Viscosity/40°CASTM D 445 (mm²/s)39,4447,0766,80
Viscosity /100°CASTM D 445 (mm²/s)7,667,36/
Viscosity indexASTM D 2270 (−)168119/
Neutralisation numberASTM D 974 (mg KOH/g)0,710,481,60
Compressibility/   
0 bar(Pa−1)3,24E − 106,09E − 105,27E − 10
50 bar 3,18E − 105,91E − 105,18E − 10
100 bar 3,13E − 105,74E − 105,09E − 10
200 bar 3,01E − 105,38E − 104,90E − 10
400 bar 2,78E − 104,66E − 104,54E − 10
Bulk modulus/   
0 bar(Pa)3,09E + 091,64E + 091,90E + 09
50 bar 3,14E + 091,69E + 091,93E + 09
100 bar 3,20E + 091,74E + 091,97E + 09
200 bar 3,32E + 091,86E + 092,04E + 09
400 bar 3,60E + 092,15E + 092,20E + 09