Fig. 5. The adsorption/desorption isotherms of EASA films produced using (a) C₁₈TAB (Mohamed et al.¹⁹), (b) C₁₈DMEAB, (c) C₁₈DEMAB and (d) C₁₈TEAB surfactants using toluene as the adsorptive. The pore size distribution curves are shown in the insets.