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The impact of the hydrophobicity of oppositely charged additives on the stability of C 14 TAB foam films has been studied using a thin film pressure balance (TFPB). Disjoining pressure isotherms of 10 −4 M C 14 TAB solutions containing negatively charged sodium alkanoates C n OONa with increasing chain length from n=4 to n=12 are measured. The results of disjoining...