Abstract

The surface tension of ionic liquid (IL) C 5MIBF 4 (1-methyl-3-pentylimidazolium tetrafluoroborate) with various amount of water was measured by the forced bubble method at 278.15 to 338.15 ± 0.05 K . In terms of standard addition method, the surface tension of pure IL C 5MIBF 4 was obtained. The properties of surface for pure C 5MIBF 4 were discussed in terms of the principle of independent surface action and Glasser's theory of lattice energy. Using the surface tension data, the interstice model was examined.

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