Fig. 5: Binary mixture characterisation of SOS with SDS. | npj Computational Materials

Fig. 5: Binary mixture characterisation of SOS with SDS.

From: An autonomous robotic module for efficient surface tension measurements of formulations

Fig. 5

a Surface tension isotherms of the binary mixture SOS/SDS at different molar fractions of SOS, with exploration points shown as circles and exploitation points as crosses. Surface tension isotherms were measured at 23 °C. b Critical micelle concentration (CMC) and c adsorption efficiency (C20) as a function of the molar fraction of SOS (α). The dashed line represents the ideal behaviour, the solid line is a fit using Rubingh’s model23 to determine the interaction parameter (β) between both surfactants, either for micellization (βM = −2.3) or adsorption (βσ = −1.1).

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