I am looking forward to analyze the contact angle (sessile drop method) data and determine the solid surface energy using Owen-Wendt (modified Fowkes) analysis. I will be using diidomethane-Hexadecane or diidomethane-ethylene glycol as probe fluids.
I am sure that neither SDS nor CTAB are soluble in hexadecane because they are not even soluble in benzene. I think that both are soluble in ethylene glycol because they are soluble in water and lower alcohols.