posted on 2022-12-28, 19:11authored byCarmen Almodovar, Héctor Artigas, Saoussen Wacharine, Kaïs Antar, Carlos Lafuente
The surface behavior of 18 binary mixtures at T = 298.15 K and at atmospheric pressure (p = 0.1
MPa) was measured with a drop volume tensiometer. These mixtures are
formed by alkyl lactates (methyl lactate and ethyl lactate) and alcohols
(n-alkanols from methanol to 1-hexanol and isomeric
butanols). Surface tension deviations for all these systems were calculated
and correlated with the mole fraction using the Myers–Scott
equation. For the mixtures alkyl lactate with methanol, the surface
tension deviations are positive. With regard to the mixtures containing
ethanol, the surface tension deviation is positive for methyl lactate
and slightly negative in the lactate-poor region for ethyl lactate.
For the rest of the mixtures, the surface tension deviations are negative.
A molecular interpretation of the different behaviors observed was
proposed.