Interaction Between Gemini Cationic Surfactants and Gelatin Investigated by Fluorescence

Steady-state fluorescence has been used to investigate the interaction between Gemini cationic surfactants and gelatin.The critical micelle concentration,micelle aggregation number and micelle micropolarity of Gemini cationic surfactants have been determined.With increasing of the hydrophobic group of the Gemini cationic surfactants,the cmc and the micelle micropolarity decrease,Nagg increases.Addition of gelatin has the effect on the micelles of the Gemini cationic surfactants: the cmc value and the micelle micropolarity increase,Nagg decreases.