Dear all,
Upto my current understandings, a dessipation of interfacial tension between interfaces describes the value of surface excess Γ (umol/m2), which could be obtained using Gibb's adsorption isotherm,
However, the equation predict the value well for air/water, and non polar organic solvent/water interfaces only.
However, the equation could not predict the value for a polar organic solvent/water interface. I hardly found any literature regarding this issue.
Kindly help me to find literature, addressing the specific issue, or suggest me about factors which influence on the value of surface excess else than dessipation of interfacial tension.
Regards
Gibbs equation is working for adsobtion on solid-- surfactant solution as well.
The Gibbs equation is a rigorous thermodynamic relationship. It does not predict anything, it relates interfacial tension and adsorption. Experimental problems may occur with polar|polar interfaces due to miscibility, partitioning and adsorption too low to detect, but Gibbs equation still holds there.
Gibbs equation is working for adsobtion on solid-- surfactant solution as well.
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