Surface tension and contact angle measurements of a hexadecyl imidazolium surfactant adsorbed on a clay surface
نویسندگان
چکیده
The surface tension of 1,2-dimethyl-3-N-hexadecyl imidazolium tetrafluoroborate (Im BF4) as a function of concentration has been measured. Between 10−5 and 4× 10−4 mol/L, the surface tension decreases with increasing imidazolium concentration. Aggregate formation appears to occur at a concentration near 4× 10−4 mol/L for temperatures between 50 and 75 ◦C. Small angle neutron scattering measurements show the aggregates to be micelles with an aggregation number ≈83. Advancing and receding contact angles of Im BF surfactant solutions
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