Surface Activity Research of Cationic Gemini Surfactants

摘要

Cationic Gemini surfactant concentration, the inorganic salts added and the pH value of surface tension obtained cationic gemini surfactant critical micelle concentration is 0.4mmol / L;by adding three kinds of inorganic salts NaCl, MgCl_2, and Na_2SO_4,which Na_2SO_4 has the greatest impact on surface tension, followed by MgCl2.The surface minimum tension of the pH ranged from 9 to 11, indicating that the surface activity of cationic gemini surfactants achieved the highest. Cationic Gemini surfactant is developed in recent years a new type of surfactant, had high surface activity than ordinary surfactants[1].Usually characterized by the surface tension of cationic gemini surfactants of the surfactant, and the lower the surface tension of surfactant, the better of surface activity.External factors affecting the surface activity of cationic gemini surfactants had a lot, this article studied three major factors:Through the impact of different concentrations on the surface tension [2],obtained the critical micelle concentration and critical micelle concentration corresponds to the lowest surface tension value;discussion of the cationic gemini surfactant surface tension changed in different types of inorganic salts [3] [4],studying the impact of different pH values on the surface tension of cationic gemini surfactants [5].